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Padlocks with modular locking mechanisms can often be taken apart to change the tumblers or to service the lock. Modular locking mechanism cylinders frequently employ pin, wafer, and disc tumblers. Padlocks with modular mechanisms are usually automatic, or self-locking (that is, the key is not required to lock the padlock)
The lock company, Slaymaker, Barry and Company, was founded in 1888 by Samuel R. Slaymaker and John F. Barry of Connellsville, Pennsylvania.Samuel Slaymaker had become interested in switch and signal locks while working for the Pennsylvania Railroad as a civil engineer.
ASTM F883 is a standard performance specification for padlocks.. This standard was created by the American Standard for Testing and Materials (ASTM). ASTM International, founded in 1898, is an international standards developing organization that develops and publishes standards for a wide range of materials, products, systems, and services.
Master Lock is an American company that sells padlocks, combination locks, safes, and related security products.Now a subsidiary of Fortune Brands Innovations, Master Lock Company LLC was formed in 1921 by locksmith-inventor Harry Soref and is headquartered in Oak Creek, Wisconsin.
The Wilson Bohannan Lock Company (Marion, Ohio) has been manufacturing padlocks for almost 160 years. This makes them America's oldest continuous padlock maker. The founder Wilson Bohannan received his first padlock patent (No. 27,883) on April 17, 1860. In that patent his first name is spelled 'Wilsin', while in subsequent patents (Nos. 46,539 ...
The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.