The Padlock Patent Archive

Three centuries of keeping things shut

All 150 patents

Patent drawing of a 19th-century padlock and door lock showing an internal toothed bolt rack, four spring-loaded sliding pieces in a rack box, a special multi-pin key, and adaptations to a rotary door lock and a liquor cask tap lock.LOCK AND KEYWilliam Morrett Williams · December 1, 1840Technical patent drawing showing nine figures of a padlock: an exterior view with U-shaped shackle and escutcheon, two cutaway interior views revealing internal hook and latch mechanisms, two individual hook pieces of differing weight, a latch piece, two keys with hollow bow handles, and a small bent spring trap.PADLOCKWilliam Ball · April 16, 1842Technical patent drawing showing three cutaway views of a padlock case with spring tumblers and a hidden safety bolt engaging a notched hasp, plus detail views of the bolt, bearings, and a double-bitted key.PADLOCK.George McGregor, Robert Lee, and Thos. G. Clinton · August 26, 1851Two front-view line drawings of a padlock, one showing the exterior with shackle labeled B, and one with the front plate removed revealing internal springs, levers, and a rotating disk mechanism, plus a small horizontal cross-section below.PADLOCKI. J. Oldis · January 1, 1856Patent drawing showing a semicircular metal lock case mounted on a door jamb pin, with internal bolt and tumbler mechanism labeled with letters, alongside a separate bit key and a side elevation of the door and jamb assembly.LockWilliam H. Butler · October 28, 1856Patent drawing showing an oval metal lock-and-label sheath (Fig. 1) with a circular padlock mechanism at top labeled 'WASHINGTON,' alongside several other oval and rectangular sheath shells, edge views, and detachable printed city-name labels including BALTIMORE, PHILADELPHIA, NEW YORK, NEW ORLEANS, and FREDERICKSBURG.COMPOUND LOCK AND LABEL-SHEATH.Samuel W. Marsh · April 3, 1860Patent drawing sheet showing eleven figures of a shackle padlock, including exterior front views, interior mechanism views with bolt, tumbler, and spring, an edge cross-section, and detached parts like the bolt shank and tumbler.IMPROVEMENT IN PADLOCKSMoses T. Ridout · September 9, 1862Patent drawing of a heart-shaped padlock shown in three cross-sectional views with shackle up and down, plus separate detail drawings of three tumblers, a bolt, a lever, and a barrel key.IMPROVEMENT IN PADLOCKSConrad Liebrich · August 11, 1863Patent drawing of a round padlock with a curved shackle, shown in exterior view, sectioned interior with divided stop-pins and a turning block, a separate flat key with two pins, and a rectangular door-lock variant with a similar pin mechanism.IMPROVEMENT IN LOCKS.Thomas George Harold · November 24, 1863Four line-drawing diagrams of a padlock's internal mechanism labeled Fig. 1 through Fig. 4, showing a curved shackle B pivoted into a rounded case A, with internal parts including a spring-pawl b, catch-plate d', hook d, tumblers g and g', and various numbered teeth and slots illustrating the locking and unlocking sequence.IMPROVEMENT IN PADLOCKSWilson Bohannan · February 28, 1865Line drawing of a semicircular padlock shown in four views: an interior cutaway with the hinged two-part casing and spring-hook mechanism locked together, a side plan view, a vertical cross-section, and a fourth view showing the casing partially opened with its key.IMPROVEMENT IN PADLOCKSHenry D. Blake · August 15, 1865Patent drawing sheet showing seven numbered figures of a round padlock body with an oscillating bolt frame, notched sliders, a slotted flat key, and cross-sections revealing internal locking mechanism.IMPROVEMENT IN PADLOCKS, &c.Wilson Bohannan · August 6, 1867Patent drawing showing four views of a padlock's internal mechanism: three oval-shaped interior views (Figs. 1-3) revealing pivoted bolts, a coiled spring, and the shackle in various locked/unlocked positions, plus a fourth figure showing two separate curved bolt pieces labeled D and C with pivot holes and notches.IMPROVED PADLOCKWilliam Harvey · February 11, 1868Technical patent drawing of a heart-shaped padlock body with a curved shackle, hinged hasp, internal sliding bolts, springs, and a separate bit key, shown in nine labeled figures illustrating the lock's construction and operation.IMPROVEMENT IN PADLOCKSJacob E. Kohout · April 14, 1868Patent drawing of a hasp lock showing a hinged latch-hook engaging a staple, a lock-case with internal spring-loaded bolt and multiple lever tumblers, and a flat key used to release the mechanism, illustrated in five labeled figures with a signature block for inventor Joseph S. Elliott.IMPROVEMENT IN HASP-LOCKSJoseph S. Elliott · May 12, 1868Patent drawing sheet showing nine figures of a padlock's internal cylinder mechanism, shackle, tumblers, and a socket key, with lettered parts and an inventor's signature at bottom.IMPROVEMENT IN PADLOCKSFrank F. Landis · May 12, 1868Patent drawing sheet showing a heart-shaped padlock with a rounded shackle, internal cutaway views revealing the spring-loaded bolt and detent screw, and an elongated ridged key with a T-shaped handle.IMPROVEMENT IN PADLOCKSDavid F. Randall · July 14, 1868Cutaway drawing of a curved-frame padlock showing an internal spindle, sliding cup, cone, and pivoted catch bar, with a circular cross-section view below labeled with letters A through F.IMPROVEMENT IN PADLOCKSAmos S. Blake · November 17, 1868Patent drawing sheet showing an egg-shaped padlock in multiple perspective and cutaway views (Figs. 1-13), revealing internal rotating disks, springs, a curved bail, and two ornate extension keys with notched wards.IMPROVED PADLOCKSamuel G. Cabell · December 14, 1869Patent drawing of an umbrella handle with a curved crook top, showing a cutaway of the internal locking tube, spring-catch hooks, and cylindrical key, plus a small circular cross-section below labeled Fig. 2.IMPROVEMENT IN LOCKS FOR UMBRELLASHiram Plumb · January 11, 1870Patent drawing of a heart-shaped padlock showing its back plate, internal arc-shaped spring bolt, tumbler, hasp, and separate key, across ten labeled figures.PadlockAndy M. Adams · April 12, 1870Patent drawing sheet showing a round padlock mechanism in three states (locked, unlocked, hasp open), labeled internal parts including bolt C, dog D, rising-block E, and pinion F, alongside a bit key, individual component details, and two cutaway views of a trunk-lock variant with double hasps.IMPROVEMENT IN PAD AND TRUNK-LOCKSAndy M. Adams · November 8, 1870Patent drawing showing an oval padlock with a curved shackle, internal ring tumblers, a bolt mechanism, and an accompanying stepped key, presented in six labeled figures.IMPROVEMENT IN PADLOCKSJoseph Corbett · November 29, 1870Patent drawing of a padlock with rounded shackle labeled B, an internal oscillating tumbler with numbered sliders, a circular notched fence, a hooked lever, and a flat multi-bitted key, alongside a separate hasp piece and cross-section details.IMPROVEMENT IN PADLOCKSJohn H. Ames · January 17, 1871Patent drawing showing an oval padlock in six figures: two face views with the case cut away to reveal an internal hook-shaped bolt, pivoted tumbler, and sliding slotted plate, a cross-section showing the key channel, and three detail views of the bolt, plate, and tumbler components.IMPROVEMENT IN PADLOCKSGeorge Merkel and Charles H. Meyer · April 4, 1871Patent drawing sheet showing fifteen numbered figures of a heart-shaped padlock case, including cross-sections revealing stacked lever tumblers, a pivoted bolt, a U-shaped shackle with slotted prongs, and detail views of individual tumbler and bridge-plate components.IMPROVEMENT IN PADLOCKSSamuel W. Budd · January 23, 1872Patent drawing sheet showing six figures of a 19th-century padlock with a curved shackle arm, rotating face-plate with multiple key-holes, internal sliding bolt, tumbler, pinion and spring lever mechanisms, and a detachable key.IMPROVEMENT IN PADLOCKSDaniel Zeiler · February 27, 1872Patent drawing showing a round padlock with a J-shaped hooked staple, an interior view of the bolt mechanism, three variant sliding bolts, a cross-section of the case, the staple alone, and a separate key with a notched bit.IMPROVEMENT IN PADLOCKSHenry Essex · August 6, 1872Patent drawing of a padlock mechanism showing four figures: a circular lock case interior with pivoting lever tumblers and a curved hasp, a flat sliding key with a toothed bit, and a side view of a similar lock with an alternate curved tumbler arrangement.IMPROVEMENT IN PADLOCKS, &c.Daniel K. Miller · October 28, 1873Patent drawing of a round padlock showing its exterior with a curved shackle and hasp, plus two internal views revealing pivoted slotted tumblers and springs in locked and unlocked positions, alongside a flat key.IMPROVEMENT IN PADLOCKSFredrick Egge · December 23, 1873Patent drawing of a padlock showing eight labeled figures: interior views of the lock case with shackle open and closed, the spring-bolt with a stepped stud, pivoted tumblers, and a beveled-ward key.IMPROVEMENT IN PADLOCKSHerrmann Ahrend · January 27, 1874Patent drawing of a heart-shaped padlock interior mechanism alongside detailed views of a rotating key-hub and matching flat key with a bit-receiving slot.IMPROVEMENT IN PADLOCKSWilliam Wilcox · January 27, 1874Patent drawing of a round padlock showing six figures: the shackle and tumbler mechanism in locked and unlocked states, an exploded view of the lifted mechanism, a front elevation of the assembled lock, an edge view of the case, and a flat sheet-steel key shown from front and edge.IMPROVEMENT IN PADLOCKSFredrick Egge · July 14, 1874Patent drawing showing a railroad freight-car door seal-lock with a sliding bolt, staple, spring-detent pin, and a metal tag reading NYC&HRRR NY TO CHICAGO E234, plus detail views of the bolt mechanism and alternate tag/seal designs.IMPROVEMENT IN SEAL-LOCKSTheodore M. Foote and Charles A. Randall · August 4, 1874Patent drawing showing a padlock hasp with a hooked eye, a rounded rectangular case, and cross-sections revealing internal notched tumblers and pivoting dogs that lock the bolt in place.IMPROVEMENT IN PADLOCKS, &c.Daniel K. Miller · December 22, 1874Patent drawing of a heart-shaped padlock with an oval body, showing an internal spring, bolt, dog, tumblers, and a warded key, across ten labeled figures.IMPROVEMENT IN PADLOCKSBodo Wallmann · October 26, 1875Patent drawing showing a round padlock with a curved hasp, an internal circular spring bolt, and a series of small circular disk diagrams illustrating a rotating keyhole guard cap.IMPROVEMENT IN PADLOCKSGeorge R. Cutbirth · December 28, 1875Patent drawing sheet showing eleven figures of a cylindrical padlock, including exploded internal views with a rotating dust-cover plate, spring-loaded hook staple, tumbler mechanisms labeled E, and a bit key shown from side and end views.IMPROVEMENT IN PADLOCKSJacob L. Hirsch · January 4, 1876Two cutaway diagrams of a round padlock showing the internal bolt, tumblers, and spring mechanism with the shackle at top, alongside a drawing of the irregularly-shaped thrust key.IMPROVEMENT IN PADLOCKSIsrael Donald Boyer · April 25, 1876Patent drawing of a round padlock showing its exterior case, an internal cutaway with a hinged hasp secured by pivoting dogs and tumblers, a sliding bolt, and a corresponding notched key.IMPROVEMENT IN PADLOCKSRosewell Thompson · August 1, 1876Patent drawing showing a railroad car seal-lock mounted on a wooden door, with a hasp, staple, clevis, and pivoted bolt assembly, plus detailed cross-sections of the lock's casing, clasp, bolt, sealing tool, and lead seal with paper stamp.IMPROVEMENT IN SEAL-LOCKSJ. Nottingham Smith · April 17, 1877Patent drawing of a padlock showing the bow-shaped shackle, internal locking bolt with teeth, sliding plug, and a dovetail-mounted sliding guard covering the key-hole on the underside of the case.IMPROVEMENT IN KEY-HOLE GUARDSChristian Eisele · May 22, 1877Patent drawing of a U.S.-marked padlock showing exterior view, internal cross-section with bolt and tumblers, and a double-bitted key.IMPROVEMENT IN PADLOCKSWarren H. Taylor · July 10, 1877Patent drawing of a round padlock showing internal dog, tumblers, and pivoted shackle mechanisms across five figures, with a separate key illustration.IMPROVEMENT IN PADLOCKSFriend W. Smith and Fredrick Egge · September 4, 1877Patent drawing sheet showing nine figures of variously shaped padlock cases—round, heart-shaped, and shield-shaped—each with corrugated or ribbed surfaces, plus cross-sectional views labeled with letters A through E indicating shackle, bearings, and protecting plates.IMPROVEMENT IN PADLOCK-CASESFriend W. Smith and Fredrick Egge · September 4, 1877A whimsical padlock cast in the shape of a hooded child's head and shoulders, with one arm bent so the hooked hand is inserted into the open mouth to lock the shackle.IMPROVEMENT IN PADLOCKS.John Gérard · September 11, 1877Patent drawing of a heart-shaped padlock showing the internal mechanism with a pivoted tumbler, hooked arm, sliding bolt, springs, and a key inserted into the keyhole, alongside separate detail views of the tumbler/pawl assembly and the bolt.IMPROVEMENT IN PADLOCKSJames J. Turner · December 4, 1877Patent drawing of a padlock with a curved shackle and round case, showing internal bolt, tumbler, and key mechanism in Fig. 1 and Fig. 2, with two small detail views (Fig. 3 and Fig. 4) of the tumbler component.IMPROVEMENT IN PADLOCKS.James J. Turner · December 25, 1877Three sectional elevation drawings of a padlock showing internal mechanism including a pivoted shackle, spring-loaded lock-bolt, swinging dog, and key pin, labeled with letters A through L across Figures 1, 2, and 3.IMPROVEMENT IN PADLOCKSWilliam P. Yoe · January 1, 1878Patent drawing of a round combination padlock with a chain looped through two side holes, a dial and knob on top, and internal cutaway views revealing nested permutation rings and a locking bolt.IMPROVEMENT IN COMBINATION-PADLOCKS.Herbert M. King and S. Dermott Pierce · February 26, 1878Patent drawing of a tubular padlock showing a cylindrical lock case with a U-shaped shackle, internal cross-section revealing the bolt, spring, cam spindle and tumbler, plus separate detail views of the sliding clasp, spindle, tumbler, and a flat key with notched stem.IMPROVEMENT IN PADLOCKSHippolite A. Deraismes · March 5, 1878Patent drawing of a hasp-lock showing a long hasp arm H attached to a circular lock case c containing an internal bolt mechanism with tumblers, teeth, and a staple, alongside a cross-sectional view and an inverted bolt view labeled Fig. 1 through Fig. 4.IMPROVEMENT IN HASP-LOCKS.Conrad Fichter · April 2, 1878Patent drawing of a heart-shaped padlock case with a pivoted curved shackle, internal spring-loaded bolt and tumbler mechanism, and separate detail views of the tumbler and bolt components.IMPROVEMENT IN PADLOCKSWilson Bohannan · June 25, 1878Patent drawing of a padlock showing its rounded U-shaped shackle, internal bolt mechanism in cross-section, lock cover with a cross-shaped keyhole, and two distinct flat keys used to operate the locking bolts and an independent shackle-retaining bolt.IMPROVEMENT IN PADLOCKSLouis Hillebrand · July 23, 1878Patent drawing of an oval cast-iron padlock shown with its side plate removed, revealing a central shackle spindle surrounded by spring-loaded sliding tumblers, alongside separate views of the shackle and tumbler details.IMPROVEMENT IN PADLOCKSWilliam H. Bramble · July 30, 1878Patent drawing of a round padlock showing internal hooked dog, tumbler springs, and lettered parts, with a separate flat push key and cutaway views of the shackle open and closed.IMPROVEMENT IN PADLOCKS.Frederick Egge · August 27, 1878Patent drawing of a padlock-like lock mechanism (Fig. 1) with a curved internal passage, bolt, staple, and springs labeled A through R, alongside a flexible key (Fig. 2) with a handle, coiled wire shank, and toothed head labeled H through O.Flexible Key for Locks.Legrand J. Roberts · September 17, 1878Patent drawing sheet showing a heart-shaped padlock with internal spring tumblers, a hinged shackle, and two flat keys with stepped bits, labeled with reference letters for the case, dog, tumblers, and springs.IMPROVEMENT IN PADLOCKSWilliam Baldwin · November 19, 1878Patent drawing of a padlock showing cross-sections of the shell with tumblers, the U-shaped shackle with a lug, a locking-plate, key-tube, and an inverted view of the case.IMPROVEMENT IN PADLOCKSCharles W. A. Romer · March 18, 1879Patent drawing showing a padlock's oval case with U-shaped notched shackle, internal stacked latch plates with springs, and an ornate warded key.IMPROVEMENT IN PADLOCKSWilliam P. Wirth and Theodor H. Wichert · April 1, 1879Patent drawing of a padlock showing its rounded shackle and body in Figure 1 alongside a tapered screw-key, with internal cross-section views in Figures 2 and 3 revealing a row of sliding threaded tumblers and springs, and Figure 4 showing the lock's interior lever and bolt mechanism with the side plate removed.IMPROVEMENT IN PADLOCKSWilliam C. McGill · April 1, 1879Patent drawing of a cylindrical padlock with a heart-shaped hasp on the left, a key inserted into a raised chamber on top, and cutaway views below showing two interlocking sliding bolts with flanges and coiled springs.IMPROVEMENT IN PADLOCKSTheodor Heinrich Wichert · April 22, 1879Patent drawing showing a padlock's internal cross-latch mechanism, a U-shaped shackle, a warded key, and several small toothed latch pieces labeled with reference letters.IMPROVEMENT IN PADLOCKSWilliam P. Wirth and Theodor Heinrich Wichert · April 22, 1879Patent drawing of a freight-car door seal-lock showing an outer face-plate with a rectangular seal window labeled g, an inner latch-bar and hinged plate mechanism with pivoted lever and knob, and sectional views revealing the box-shaped metal seal-frame with shoulders holding a glass or wax seal.IMPROVEMENT IN SEAL-LOCKSEdgar F. Hotchkiss · July 29, 1879Patent drawing of a hexagonal padlock showing internal bolt, tumbler, spring-trigger plate, curved operating arm, and a key with notched projections, alongside an exterior perspective view of the locked case with staple.Padlock.William F. Hofmann · July 29, 1879Patent drawing of a padlock showing its rounded shackle, tubular metal shell, and internal locking mechanism with lever tumblers, bolt, and springs in cross-section.IMPROVEMENT IN PADLOCKSWarren H. Taylor · August 5, 1879Patent drawing of a round padlock with a hinged hasp (Fig. 1), two enlarged cross-sections of the internal bolt and key mechanism (Figs. 2 and 3), and a perspective view of the notched key cylinder (Fig. 4).IMPROVEMENT IN PADLOCKSHenry A. Dodge · August 19, 1879Patent drawing of a padlock showing an internal rotating notched disk, gear segment, spring, anchor, and key mechanism in cross-section, with a shackle and a separate bent key illustrated below.IMPROVEMENT IN PADLOCKSConrad Jensen · September 30, 1879Technical patent drawing showing the circular internal mechanism of a padlock with a curved vibrating bolt, pivoted lever, spring-loaded blocking piece, and a separate key-post and tumbler piece, alongside a cross-section view showing a barrel key inserted into the lock.Padlock.Frank W. Mix · March 9, 1880Patent drawing showing four views of a trunk permutation lock: a scalloped cover plate with tumbler recess, a hinged hasp with numbered dial and knob, the closed locked assembly, and a cross-sectional view revealing internal tumblers and pins.Permutation-Lock.Benjamin F. Kelly · January 11, 1881Patent drawing showing a trunk lock assembly with a front plate containing a keyhole and rotary bolt, a hinged hasp with a lettered permutation dial, internal lever and bolt mechanisms on the reverse plate, and separate detail views of a bit key and small locking plates.PERMUTATION TRUNK-LOCKJohn Kubler · December 6, 1881Patent drawing of a combined hasp lock showing three views: a plan view of the assembled hasp with pivoted hammer, an exploded plan view revealing the internal locking bar and pawl mechanism, and a side edge view showing the key engaging the locking bolt.HASP-LOCK.Joseph F. Robinson · March 21, 1882Patent drawing of a padlock with the side wall removed, showing an arched shackle, two hooked dogs labeled C and D engaging catches on the shackle, a slotted plate-lever G, tumblers E and F, and a separate detail view of a bit key with a notched blade.PADLOCKElihu L. Perkins · April 11, 1882Patent drawing showing a freight car door lock with a hatched bolt and pivoting hook catch mechanism in cross-section, plus side and front elevations and a small inverted catch plan view.SEAL-LOCKVirgil A. Krepps · October 23, 1883Patent drawing showing a car-door seal lock with a hook-headed sliding bolt, a pivoted gravity catch inside a lock-case mounted on the wood door jamb, and a separate hook-plate for holding the catch up and securing it with a wire seal, illustrated across five labeled figures.SEAL-LOCK FOR CAR-DOORS.Virgil A. Krepps · December 25, 1883Patent drawing showing a metal hasp with a circular broken locking ring mounted at one end, plus detailed cross-sections of the internal spring-loaded locking pin and a key-operated padlock variant.HASP-LOCK.Byron D. West · February 19, 1884Patent drawing showing an oval padlock connected to a long chain with two loop rings, alongside a cutaway view of the lock's internal spring mechanism and two illustrations of the chain securing luggage to a bench and a rack.CHAIN-LOCK OR BAGGAGE-GUARD.Myron J. Clark · February 26, 1884Patent drawing showing a metal hasp bar with a pivoted hook, a circular key-operated lock mechanism, and a locking staple slot, illustrated in three views: front elevation, plan section, and front elevation with lock-plate removed.HASP-LOCKWilliam Fry · May 20, 1884Patent drawing of a padlock showing five figures: cutaway side views of the lock body with shackle, spring bolt, and pivoted tumbler mechanism, plus a cross-sectional view of the key.PADLOCK.Wilson Bohannan · May 19, 1885Patent drawing showing a pair of paneled double doors with an ornate pivoted lock hasp and hook mounted at their meeting edge, plus enlarged detail views of the hook's wedge-shaped head, spring-lock housing, and key.COMBINED LOCK HASP AND HOOK.Frank N. Mihills · June 9, 1885Patent drawing showing a long curved hasp with a hook-prong end, a cutaway lock mechanism with an internal sliding bolt and spring, a cam-notched key head, and a modified chain-attached hasp variant.HASP-LOCK.Charles P. Pond · June 30, 1885Patent drawing of a Scandinavian-style padlock showing a cutaway body with shackle B, notched tumbler C, clutch plate D, interchangeable wards G H I, and a spring-loaded key E with double bits, alongside smaller face-view details of the tumbler, clutch, and wards.PADLOCK.Samuel McCarter · July 28, 1885Patent drawing showing four figures: two plan views of an oval whip-socket lock casing with internal bolt, springs, and a toothed shackle labeled with letters B through F, an edge view showing the lock's layered construction, and a side view of the split semi-cylindrical whip socket with a key inserted at the top.WHIP-SOCKET LOCK.Robert McDougall · September 29, 1885Patent drawing of a cylindrical portable door-securer showing a threaded hasp, combination disks with letter markings, and a ring for attaching to a key chain, with ten labeled cross-sectional and detail figures.DOOR-SECURER.Daniel Bromley · January 19, 1886Patent drawing of a cylindrical padlock with a U-shaped shackle, a flat notched key, and an internal cross-section showing stacked rotating tumbler plates and a locking collar.PADLOCK.Clarence L. Wheeler · April 13, 1886Patent drawing of a padlock showing a curved metal shackle, internal notched tumblers, a pivoted dog, and a sliding bolt mechanism in cross-section, with separate detail views of the tumbler stack and key.PADLOCK.Milton Jackson · April 20, 1886Patent drawing of a padlock showing four figures: two face views of the lock body with shackle open and closed revealing internal bolt and tumbler mechanism, a cross-section with the key inserted, and a detached perspective of the tumbler piece.PADLOCK.Arthur Stewart · July 6, 1886Patent drawing showing a round padlock with a curved hasp in both locked and unlocked positions, an internal spring-actuated bolt and tumbler mechanism visible through a cutaway casing, a cross-sectional view of the lock body, and a separate illustration of the notched key with a round head and stepped tip.PADLOCK.Frank W. Mix · October 26, 1886Patent drawing of a round padlock with an arched hasp, showing internal locking-tumblers and guard-tumblers arranged around a central pivot stud, plus a detail of two tumblers and the notched key used to operate it.PADLOCKFrank W. Mix · April 12, 1887An isometric line drawing of a wooden shipping box with a small rotary rod fastener mounted on its top edge, accompanied by six smaller detail drawings showing the fastener's bracket, rod, plate, and seal mechanism.BOX-FASTENER.Charles W. Beehler · April 19, 1887Patent drawing sheets showing a cylindrical car door lock with a grooved and cam-projected bolt, a socket with spring dogs mounted on an escutcheon plate, a locking-pin with lugs, and a frangible cast-iron seal fitted over the bolt, illustrated in multiple cross-sectional and elevation views labeled Fig. 1 through Fig. 14.CAR LOCK AND SEAL.Joseph Chapman · May 31, 1887Patent drawing of a hasp-lock plate with an internal rotating lock-bolt, key-post, and button, alongside smaller detail views labeled Fig. 2 through Fig. 11 showing the stamped sheet-metal parts including the collet, button, and key-post assembly.HASP-LOCK.Frank W. Mix · June 28, 1887Patent drawing showing an elongated metal hasp plate with a recessed slot displaying the words NEW YORK as an address tag, alongside a separate lock case with an internal pivoted hook and bolt mechanism shown in cutaway view.COMBINED TAG-HOLDER AND HASP-LOCK.Robert W. Greene · February 21, 1888Patent drawing sheets showing a padlock with a round hinged shackle, internal bolt and lever tumbler mechanism, and a key inserted into the case, with multiple cross-sectional and detail views labeled with reference letters.PADLOCKDavid Waine and Isaac Waine · April 10, 1888Patent drawing sheet showing twelve figures of a U-shaped shackle padlock, including exterior views, cross-sections revealing internal tumbler plates C and springs H, the key F, and a rotating guard plate L covering the keyhole.PADLOCK.William F. Troast · July 24, 1888Patent drawing of a round padlock with its face plate removed, showing an internal pivoted shackle, a hooked dog engaging tumbler notches, a detent-piece with an angled arm crossing the keyhole, and a stepped key with a notched shank labeled with numbered reference parts.PADLOCKWillard D. Doremus · May 7, 1889Patent drawing of a cylindrical padlock showing a cross-section with a U-shaped shackle, stacked internal tumbler plates labeled with letters, and several smaller diagrams of the individual tumblers, plates, and a bit key.PADLOCK.Jacob B. Amwake · October 29, 1889Patent drawing of a padlock in cross-section showing a rounded shackle, internal tumblers, a sliding bolt, and a key-cylinder, accompanied by smaller figures of keys and internal gear-like tumbler mechanisms.PERMUTATION-LOCK.Eugene C. Smith · November 5, 1889Patent drawing of a U-shaped shackle padlock showing internal spring-steel tumblers, a key inserted from below, and cross-sectional views labeled Fig. 1 through Fig. 8 with lettered parts such as A (case), B (shackle), C (tumblers), and F (key).PADLOCK.William F. Troast · December 31, 1889Patent drawing of a padlock showing the shackle, an internal eccentric dog and toothed tumbler mechanism, and a separate corrugated key with matching teeth.PADLOCK.Andrew S. Fisher · March 4, 1890Patent drawing sheet showing eight figures of a padlock: several face-on cutaway views of the lock body with numbered internal parts labeled with letters, a small ring-shaped tumbler guard, a tubular barrel key with a round handle, and a flat key variant, along with inventor's signature and witness signatures at bottom.PADLOCK.Frederick Egge · May 13, 1890Patent drawing of a padlock showing its curved shackle, internal pivoted tumblers with lugs and springs, and a flat stepped key used to release the mechanism.PADLOCKSamuel P. Stein · November 4, 1890Patent drawing of a railway switch padlock showing the internal mechanism with shackle, tumblers, spring-loaded bolt, lever, and bell alarm, along with detail views of the key, tumbler-locking device, and case components labeled with reference letters.PADLOCK.George William Lucas · January 13, 1891Patent drawing sheet showing a round padlock with a curved hasp (B) and casing (A), plus eight numbered figures illustrating the internal sliding plate, pivoted tumbler sections, locking bolt, gears, and a flat key, with inventor's signature and witness signatures at bottom.PADLOCK.Willard D. Doremus · April 28, 1891Patent drawing of a padlock showing a U-shaped shackle, internal transverse bolt, springs, revoluble key-guide, and a barrel key with notched wards.PADLOCKJacob S. Peacock · May 26, 1891Patent drawing showing an oval metal lock case with a swinging multi-section locking dog engaging a two-shouldered bolt attached to chains, plus a small key and a padlock variant with a hook-shaped hasp.LOCK.Anson Parker Merrill · December 29, 1891Patent drawing of a shield-shaped bicycle lock showing internal tumblers and bolts, a U-shaped hasp passing through the lock body, and a mounting clamp attaching the lock to a bicycle's steering head with the hasp threaded between wheel spokes.BICYCLE-LOCK.Edwin W. Macauley · August 23, 1892Patent drawing showing an umbrella secured by a chain-and-ring lock to the arm of a train car-seat, with a satchel also attached, alongside detailed close-up views of the split ring-lock mechanism in open and closed positions.COMBINED UMBRELLA-LOCK AND SATCHEL-FASTENER.Timothy J. Leehey and James O'Connell · November 15, 1892Patent drawing of a padlock showing a U-shaped shackle inserted into a casing containing pivoted tumblers, sliding dogs, springs, and a twisted key mechanism, with seven labeled figures illustrating the internal parts and key.PADLOCK.Frederick W. Schultze · February 21, 1893Patent drawing of a round padlock with a curved shackle, shown in open and closed sections revealing internal ward posts, a rotating boss, and a hollow tubular key with a pivoted bit designed to fit only matching corrugations, alongside detail views of the key and lock mechanism parts.PADLOCKFranz Meinke · March 28, 1893Patent drawing of a chain padlock showing an oval body with internal spring and pin mechanism, a detachable notched plug, a right-angle key, and chain links attached at both ends.PADLOCK.Peter Brust · April 11, 1893Patent drawing sheets showing a U-shaped shackle padlock in exploded and assembled perspective views, with internal bolt, spring, plunger, and key-guide components labeled with letters and numbers.PADLOCKWilliam F. Troast and Samuel R. Slaymaker · January 23, 1894Patent drawing of an 1894 padlock showing five figures: a cutaway shackle-and-casing assembly with numbered internal tumblers and springs, a perspective view of the internal locking frame with stacked notched tumblers, and a bottom plan view of the lock casing with keyhole and slot details.PADLOCK.Benjamin F. Loughmiller · April 10, 1894Patent drawing of a padlock with side plate removed showing internal shackle, spring-loaded tumblers, locking-dog, and key-locking bar, plus a separate key and locking-dog detail views.PADLOCKGeorge M. Hathaway · September 25, 1894Technical patent drawing showing exploded and sectional views of a padlock's internal casing, shackle, tumblers, dogs, catches, and a threaded key, with numbered reference lines identifying each part.PADLOCK.Ernst Wagenknecht · February 26, 1895Cross-section drawings of a padlock showing an arched hasp, internal pivoted tumblers, coil springs, and a multi-notched push key beside detailed tumbler and plate components.PADLOCK.Cornelius S. Van Wagoner · June 11, 1895An exploded and assembled set of technical patent drawings showing a ring-shaped padlock formed of two hinged semicircular jaws with interlocking spear-shaped heads, a sliding spring bolt, a keyhole, and a warded key, labeled with reference letters A through S.LOCK.Woodbury D. Roberts · September 29, 1896Patent drawing of a round padlock showing four figures: a perspective view with a hinged keyhole cover raised revealing internal pins and screws, a rear view with a pivoted back plate, a cross-sectional interior view with numbered mechanical parts including bolt, springs, and blocks, and an enlarged sectional diagram of the casing's internal layered components.PADLOCK.Theodor Grabowski, Kazimierz Jurkowski · February 16, 1897Patent drawing sheet showing ten figures of a padlock design, including exterior side views, internal mechanism with levers, catches, and springs, individual component plates, a locking-bar assembly, and a specially shaped key with cut-away shank.PADLOCKMartin H. Lutz and Morrow Moore · June 15, 1897Patent drawing of a padlock showing exterior view, internal bolt-and-tumbler mechanism with numbered parts, cross-sections, individual component details, and the setting key.PADLOCK.Warren H. Taylor · July 20, 1897Patent drawing of a circular padlock mechanism showing a rotary bolt, spring tumbler, pivoted dog, and hasp slot, with eight labeled cross-section and elevation figures.PADLOCK.Henry Roland · August 3, 1897Patent drawing of a round padlock showing two interlocking hinged jaws with internal tumbler mechanism, pivot-bolt, spring, and a flat key with notched wards.LOCKWoodbury D. Roberts · April 12, 1898Patent drawing of a railroad freight-car door seal lock showing a side elevation of the door and jamb with the bolt and hasp assembly, plus three cross-sectional views (Figs. 2-4) illustrating the internal tumblers, follower, and frangible seal numbered 308.SEAL-LOCKSidney T. Nickerson · November 1, 1898Patent drawing of a padlock and cylinder lock cross-sections showing a shackle, tumbler-case, rotatable locking-bar, and numbered tumbler projections, with several keys and washers illustrated separately.LOCK.Ira J. Babcock · November 29, 1898Patent drawing of a padlock with a U-shaped shackle atop a cylindrical lock body, showing internal cross-sections of a rotating tumbler cylinder, stacked disc tumblers, a locking bar, and a key with multiple bit slots, along with detail views of washers, caps, and an alternate pin-tumbler cylinder variant with a winged bolt.LOCKIra J. Babcock · November 29, 1898Patent drawing of a padlock showing the case interior with pivoted shackle, swinging dog, three concentric tumblers, and a flat multi-winged key, alongside detail views of each tumbler and ward-plate.PADLOCK.Henry G. Voight · January 31, 1899Patent drawing sheet showing eleven figures of a hasp padlock, including side elevations, sections, and detail views of the bolt, retaining-bar, ward-plate, key, and staple, with numbered reference lines pointing to internal parts.PADLOCKDaniel Krekes · May 16, 1899Patent drawing of a wrench with an adjustable jaw casing and a pivoted circular shackle at the handle end, shown in closed (Fig. 1) and open (Fig. 2) positions, with detail views of the locking bolt, key, and shackle mechanism in Figures 3 through 7.COMBINED LOCK AND WRENCHFrank Lombard and Charles Miller · May 23, 1899A patent drawing of a wrench with adjustable jaws and a sharpened locking rod, connected by a chain to secure a bicycle wheel, alongside detail views of the internal locking mechanism and face-plate.COMBINED BICYCLE-LOCK AND WRENCH.Lemuel L. Powell · January 2, 1900Patent drawing showing a chain lock assembly with a round casing housing internal tumblers, a key, and an open link, alongside a diagram of the device mounted on a spoked wagon wheel securing it to the wagon body.LOCKING-CHAINJohn U. Barr · August 16, 1910Patent drawing sheet showing an exploded padlock with an arc-shaped shackle, circular actuator plate with teeth and slots, cam members, connecting links, and a multi-pronged key, alongside cross-sectional and detail views labeled with numbered reference lines.LOCKYancey Q. Caldwell · September 12, 1911Patent drawing of a Lewis A. Brown padlock showing two pivoted半-round members with an internal spring hook, shoulder, marked disk guard, and cross-sectional views labeled Figures 1 through 9.PADLOCKLewis A. Brown · January 11, 1916Patent drawing of a cylindrical permutation padlock showing an exploded barrel with letter-marked rotary tumbler rings, a threaded end cap, a shackle with locking projections, and a key-shaped pull, all labeled with numbered reference lines.PERMUTATION-PADLOCKCharles J. Evans · March 28, 1916Patent drawing showing a cone-shaped automobile lock with a hinged shackle bar, internal bell-crank levers and bolts, and a rotatable protective ring at the base, plus a view of the lock applied to a steering wheel with gas lever clamp.LOCK MECHANISM FOR AUTOMOBILES.Samuel H. Fish · December 18, 1917Three patent drawings of a padlock: an exterior perspective view marked 'WZ' with a keyhole, a vertical cross-section showing internal sliding bars, springs, and pins, and a horizontal cross-section showing the pinion and rack-toothed bars inside the casing.TRICK-LOCKWasyl Zadorozny · September 23, 1919Patent drawing showing a hooked padlock body with a threaded locking screw hidden inside a cylindrical socket, along with several triangular and lugged keys and screw-head variants used to operate the concealed locking mechanism.SCREW PADLOCKSamuel P. Hull and Edward A. Everett · December 28, 1920Patent drawing of a round padlock showing internal tumbler mechanism, pivoted shackle, springs, and numbered parts across five figures, with the inventor's signature at the bottom.PADLOCKSamuel R. Fraim · May 31, 1921Patent drawing showing a chain-and-block locking device with a rectangular casing, U-shaped link, chain, sliding key-operated block, and internal bolt mechanism, illustrated in four figures labeled Fig.1 through Fig.4.LOCKING DEVICERaymond K. Gray · August 9, 1921Patent drawing of a padlock showing the internal latch, spring, and lever mechanism in Fig. 1, and a vertical cross-section of the same lock with the shackle and dummy button in Fig. 2.SECRET COMBINATION LOCKJoseph Ciotola and Dominick Polidoro · May 23, 1922Patent drawing showing a chain-and-plug lock device attached to an automobile wheel rim and body, with cross-sectional views of the internal plunger bolt and key-actuated cylinder lock, plus a faucet fitted with a similar lock mechanism.AUTOMATIC SAFETY LOCK DEVICE.Otto H. Paschke · June 13, 1922Patent drawing sheet showing nine figures of a circular padlock mechanism: an assembled front view with looped hasp links, an exploded interior view revealing stacked tumblers and a pivoting locking bolt, a separate cover plate with slots, a perspective locking bolt with curved ends, a hasp element, a tumbler and spring, a latching device, a bitted key, and a modified door-mounting hasp assembly with screws.LOCKAngelo C. Messina and Joseph Messina · October 2, 1923Patent drawing of a cylindrical combination chain lock showing a sectioned body with rotating letter collars marked A through K, an internal sliding bolt with keeper lugs, and end views of the bolt and locking collar.COMBINATION CHAIN LOCKWilliam Burkle · October 30, 1923Patent drawing of an egg-shaped padlock housing shown applied to a hinged hasp with a staple, plus a cutaway longitudinal section revealing an internal spring-loaded tumbler, bolt, and key mechanism.PADLOCKWilliam Gordon Parmele · July 14, 1925Cutaway drawing of a padlock showing a rounded shackle, internal rotating lock cylinder with spring-loaded bolt, and a flat notched key beside smaller detail views of the crown, sleeves, and bore cross-sections.PADLOCKHeinrich Biemer · March 15, 1927Patent drawing of a spare tire chain lock showing a wheel with a chain looped through the spider and rim, connected to a small cylindrical lock casing with eyebolts, key slot, and internal locking bolt mechanism shown in cross-section.TIRE CHAIN LOCKJames F. Raleigh · January 3, 1928Patent drawing of a cylindrical padlock with a pivoted shackle, showing internal spring-loaded tumbler, stacked guide plates, and a fluted key with transverse notches designed to align with the internal plates.PADLOCKPeter Sczepczenski · February 17, 1931Patent drawing showing a curved chain with hook ends looping around a tire and rim, with a detailed cylinder lock and sliding bolt mechanism, plus separate sectional views of the chain links, studs, and lock body.LOCK MECHANISMColvin L. Johnson · April 21, 1931Patent drawing sheet showing six figures of a laminated padlock: an assembled side view with shackle and rivets, an end view, a bottom view with keyhole, two cutaway sectional views revealing internal spring, shackle arms, and locking plate, and a plan section showing the key and internal guard mechanism.LAMINATE LOCKJulius G. Sabo · December 15, 1931Patent drawing sheet showing a padlock with a U-shaped shackle and rectangular body, alongside detailed exploded and sectional views of the internal disc-tumbler lock insert, casing, bolt, and key plug components labeled with numbered reference lines.PADLOCKSamuel R. Fraim · January 31, 1933Patent drawing of a cylindrical padlock mechanism showing the main lock-member with a threaded plug, key slot, spring tumblers, and a complemental screw-driven member with mating jaws, illustrated in perspective, cross-section, and detail views labeled Fig. 1 through Fig. 5.LOCKLyle B. Shinn · August 28, 1934