Sargent and Greenleaf
Sargent and Greenleaf, more commonly known among locksmithing circles as S&G, is a U.S. company that manufactures combination locks, key-operated safe and safe deposit box locks and associated equipment.
The company was established in 1865 when James Sargent and Halbert Greenleaf became partners. A manufacturing facility was built in Rochester, New York, and the company remained in that city until 1975. Since then, the company has been in Nicholasville, Kentucky.
In 1857 Sargent had designed the Sargent’s Magnetic Bank Lock, said to be the first successful key changeable combination lock.
In 1873 Sargent created the first time lock, using parts from eight-day clocks.
In 1880 Sargent connected one of his combination locks to a delay timer, creating the first time-delay combination lock.
Locks are sold around the world through associated distributors.
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