Signals and indicators – Indicators – Magnetically actuated
Patent
1992-12-07
1993-08-17
Cuchlinski, Jr., William A.
Signals and indicators
Indicators
Magnetically actuated
G01D 512
Patent
active
052359336
ABSTRACT:
There is described an improved device for indicating the status of a room or adjoining space, the device including first and second plates hingedly connected to one another along adjacent edges thereof, a spring urging the second plate into a normally closed position overlying and parallel to the first plate to the surface of a door. A magnet or equivalent devices are used to temporarily connect the second plate to a second surface, such as a door frame, adjacent to and extending at an angle to the surface of the door, wherein relative movement of the door away from the second surface breaks the connection between the second plate and the second surface, whereupon the second plate automatically returns to its normally closed position.
REFERENCES:
patent: 823782 (1904-03-01), Holden
patent: 2002725 (1935-05-01), Wyatt et al.
patent: 2730298 (1956-01-01), Haserodt
patent: 3343784 (1967-09-01), Waldhaus et al.
patent: 3516036 (1969-01-01), Lea
patent: 3698352 (1972-10-01), Forman
patent: 3915112 (1975-10-01), Forester
patent: 4040381 (1977-08-01), Keogh, Sr. et al.
patent: 4316575 (1982-02-01), Van Darwarka
patent: 4401050 (1977-08-01), Britt et al.
patent: 4567846 (1986-02-01), Kurtz
patent: 4702411 (1987-10-01), Yager
patent: 4840307 (1989-06-01), Hartman
patent: 4899683 (1990-02-01), Cuffaro
patent: 4976214 (1990-12-01), Lee et al.
Pare Robert
Stanzel Mervin
Waddell Richard
Weatherall Allan
Beres John L.
Cuchlinski Jr. William A.
Mann Michael A.
LandOfFree
Indicator device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Indicator device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Indicator device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2237146