Time Lock Manufacturer - Sargent & Greenleaf Dates of patent: 1875 -1877 Date of Manufacturing: Early 1900's Number of movements: 1. 72 hours. This Timelock was used by Mosler on it's Corliss Safes. Each safe had 2 of the locks. The use of a single clock was limiting and soon gave way to the introduction of 2,3 and 4 movements with increased time spans.