Closure fasteners – Bolt casings
Patent
1986-03-05
1988-03-08
Moore, Richard E.
Closure fasteners
Bolt casings
292DIG60, 29216913, E05C 116
Patent
active
047295856
ABSTRACT:
A trumpet lock has an extending shell and a rotating shell which are disposed about a cylinder. The rotating shell and extending shell can be manipulated by a projection-and-slot arrangement into two positions, namely a short position and a long position. The trumpet lock has a dead bolt and an anti-burglar bolt which are linked by a guarding plate, linking-plate, pulling plate, and extending plate. When a door is closed, the anti-burglar bolt is pushed into the shell and remains there so as to prevent entry of the dead bolt into the shell by the obstruction of the guarding plate against the rear portion of the dead bolt.
REFERENCES:
patent: 4372594 (1983-02-01), Gater
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