Archive for 'Sargent & Greenleaf'

Sargent & Greenleaf

Sargent & Greenleaf

[More coming]

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

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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