Joseph Hall

Joseph Hall (1823–1889) was among the most significant figures of the safe, lock, and time lock world. After being a name partner in a number of safe-making companies beginning in 1846, he founded Hall’s Safe & Lock Co. in 1867 and would go on to spin off the highly...

Sargent & Greenleaf

[More coming]

• overview
• organization
• litigation v. Yale
• litigation with Yale
• later changes

Contest Guidelines

As an introduction to our site during our first year, each month during 2011, we at time-lock.com will run a contest and give away two copies of our book, American Genius: Bank Locks and Time Locks of the Nineteenth Century. Identify the time lock—related patent that we give an excerpt from and you could get your signed copy. All correct entrants will receive a collectable certificate.

Beta Contest: December, 2010

Difficulty: ♦ ♦ ◊ ◊ (Moderate)

This is a test run for our monthly contest that will run throughout 2011, but the prizes are 100% real!

Just as we will each month next year, we are giving away a crisp, new copy of our book, American Genius: Bank Locks...