Movable or removable closures – Closure condition signal or indicator
Patent
1997-05-14
2000-02-15
Redman, Jerry
Movable or removable closures
Closure condition signal or indicator
200 6169, G08B 1308
Patent
active
060238879
ABSTRACT:
A door opening/closing detector for detecting an opening or closing of a double door of a housing, which has a low cost construction and can improve safety of equipment. A tool for the device is to be used for the maintenance of an apparatus covered by the housing. The door opening/closing detector comprises a first projection provided in the side of a first door of the double door, a second projection provided in the side of a second door thereof, a detecting switch being actuated by the second projection, a shutter located in front of the switch and switchable between a block position for blocking the actuation of the switch by the second projection and an unblock position for allowing the actuation, and a plate spring for keeping the shutter urged toward the block position; wherein the shutter is switched by the first projection to the unblocked position when the first door is closed.
REFERENCES:
patent: 2408213 (1946-09-01), Huber
patent: 4300025 (1981-11-01), Prada
patent: 4707684 (1987-11-01), Janke et al.
patent: 5464954 (1995-11-01), Kimura et al.
patent: 5479152 (1995-12-01), Walker et al.
patent: 5672857 (1997-09-01), Frost et al.
OKI Electric Industry Co., Ltd.
Redman Jerry
LandOfFree
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