Skip to content

The Padlock Patent Archive

Three centuries of keeping things shut

Browse Dates Inventors Types About

Rotating face-plate

Patent 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, 1872

United States patent drawings and specifications are works of the U.S. government and are in the public domain — they were never copyrighted. Download them, print them, frame them. Our commentary and descriptions are © 2026 The Padlock Patent Archive.

About · Terms · Privacy · Corrections welcome — this archive gets better when collectors write in.