Archive for 'Locks'

Consolidated's Dalton Triple Guard

Consolidated's Dalton Triple Guard

For a number of years, we were aware of an advertising page from Joseph Hall’s Consolidated Time Lock Company that showed the image of a large, single-case time and combination lock, incorporating a single-movement Dual Guard [link] with a Hall combination lock. The overall construction appeared incredibly complex, with...

S&G’s Auxiliary Bolt

S&G’s Auxiliary Bolt

One of the most notable aspects of Sargent & Greenleaf’s rollerbolt time lock design was that it was quite successful, not because of simplicity and ease, but rather despite its somewhat cumbersome and inelegant manner of use. The rollerbolt itself worked admirably when controlled by a combination lock which...


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