High safety bolt control devices
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United States of America Patent
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-
Feb 23, 1982
Grant Date -
N/A
app pub date -
Jan 18, 1980
filing date -
Jan 18, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bolt assembly used for locking and unlocking a door-leaf, which comprises a bolt movable from the outside by a key introduced into the barrel of a safety cylinder, the housing of the barrel comprising a flange which can be immobilized in rotation and translation by three plates fixed to the outer surface of the door by bolt means, a fourth plate covering said bolt means. This plate is treated against drilling, and the last three plates are soldered to each other and lodged in a housing. By loosening the bolt means and removing the first plate, the safety cylinder can be replaced.
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