Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1998-10-06
1999-11-23
Wu, Daniel J.
Communications: electrical
Condition responsive indicating system
Specific condition
340666, 3405734, 200 85R, 338114, G08B 2100
Patent
active
059907991
ABSTRACT:
A chair occupancy monitoring device having pressure sensitive switch housed within a flexible cover. A cushion formed by a pair of foam pads positioned between the cover and the switch protects the switch and increases patient comfort. The switch includes first and second oppositely disposed base members. First and second electrical conductors are mounted to an interior portion of the first and second base members, respectively, on the surface facing the opposing base member. A gap is created between the electrical conductors by a pair of separator members which are disposed intermediate the oppositely disposed surfaces of the first and second base members and are mounted to a side portion of at least one of the base members. At least one electrically non-conductive contact limiter member is disposed intermediate the electrical conductors, covering a portion of the second electrical conductor. The separator members and contact limiter each have a compressibility defining a spring constant where the spring constant of the contact limiter is greater than the spring constant of the separator members. When the patients weight is applied to the device the separator member and the contact limiter member are compressed allowing the first electrical conductor to contact an uncovered portion of the second electrical conductor. When the patient's weight is removed the contact limiter and separator expand to break the contact and reopen the gap.
REFERENCES:
patent: 3704352 (1972-11-01), Fontaine
patent: 3879586 (1975-04-01), DuRocher et al.
patent: 3952173 (1976-04-01), Tsuji et al.
patent: 3960044 (1976-06-01), Nagai et al.
patent: 4164634 (1979-08-01), Gilano
patent: 4304991 (1981-12-01), Weber
patent: 4308439 (1981-12-01), Itoh
patent: 4317012 (1982-02-01), Itoh
patent: 4390758 (1983-06-01), Hendrickson
patent: 4401896 (1983-08-01), Fowler et al.
patent: 4500757 (1985-02-01), Rooney
patent: 4661664 (1987-04-01), Miller
patent: 4845323 (1989-07-01), Beggs
patent: 4907845 (1990-03-01), Wood
patent: 5796059 (1998-08-01), Boon
patent: 5886615 (1999-03-01), Burgess
Boon Stephen W.
Charles Keith P.
La Anh
Wu Daniel J.
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