Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-03-19
1999-01-19
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340545, 340556, G08B 1318
Patent
active
058618066
ABSTRACT:
When installed on a door to a room, e.g. a restroom, or other area where it is desired to monitor occupancy status of the room or other area, a light source (e.g. a light emitting diode) outside the room or area provides a visual signal to those outside the room or area whether it is occupied (flashing) or not (dark). Optionally there is a second light source, or other indicator, inside the room or area that signals, simultaneously with the outside light, to an occupant of the room or area that the device is properly working. Optionally "occupied" and "unoccupied" signals are sent to a remote station to keep a remote observer informed of the occupancy status of an out-of-sight room or area. For example, the remote signalling option can be used by persons to avoid useless trips to a distant restroom that is already occupied. Preferably an infrared sensor mounted in a cylindrical reflector in a casing mounted on the door senses movement of an occupant during a pre-set time period, i.e. window, after the door closes, the sensor's signals when the door is open are disabled. The movement of an occupant within the window causes a valid detection signal which latches an oscillator which in turn periodically energizes the light sources, indicating that the room is occupied. When the door opens the oscillator is stopped and the cycle repeats when the door closes.
REFERENCES:
patent: 3560950 (1971-02-01), Peters
patent: 3611333 (1971-10-01), Conigliaro
patent: 4023151 (1977-05-01), Markham
patent: 4679034 (1987-07-01), Kamada
patent: 4797657 (1989-01-01), Vorzimmer et al.
patent: 4808974 (1989-02-01), Cantley
patent: 4993049 (1991-02-01), Cupps
patent: 5153560 (1992-10-01), Ichikawa
patent: 5221919 (1993-06-01), Hermans
patent: 5243326 (1993-09-01), Disabato
patent: 5266807 (1993-11-01), Neiger
patent: 5268670 (1993-12-01), Brasch et al.
patent: 5309146 (1994-05-01), Kenet
patent: 5428345 (1995-06-01), Bruno
patent: 5476221 (1995-12-01), Seymour
patent: 5499016 (1996-03-01), Pantus
Bondell James A.
Vories Dennis L.
Bondell James A.
Hofsass Jeffery A.
La Anh
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