Door installation and a locking device used therein
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United States of America Patent
Stats
-
Apr 14, 1987
Grant Date -
N/A
app pub date -
May 31, 1983
filing date -
May 31, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A door installation and a locking device used therein. The door installation consisting of a door provided with the body of a lock a of the locking device, and frame members fitted with a receiving plate thereof. The body of lock has a bolt built-in. This bolt is held optionally in the half-projecting position between the wholly projecting position and the door-opening position by handling operating units. The bolt in turn puts a controlling means in motion, whereby it is possible to make an electric circuit operate automatically ON or OFF, which electric circuit is arranged to interpose in itself electric appliances, for example, such as lighting apparatuses being disposed indoors or outdoors, therefore giving practical effect to the simplification of operating the lighting on-and-off and to the power saving, and further contributing to the safety problem through preventing overheating and leakage caused by the possible neglect of not turning lighting off.
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