Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-10-29
1998-09-15
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340686, 340545, 340528, G08B 2300
Patent
active
058085530
ABSTRACT:
An apparatus for unlocking the door to a hygienic area is formed by a circuit having a pair of series connected, normally open push button switches disposed in spaced apart relation at lateral limits of a lavatory. When the switch buttons are simultaneously depressed for a predetermined time, as by the little finger of each hand of a worker, soap sprays from overhead spray heads on the worker's hands, and after the predetermined time delay, unlocks the door.
REFERENCES:
patent: 3967478 (1976-07-01), Guinn
patent: 4896144 (1990-01-01), Bogstad
patent: 5202666 (1993-04-01), Knippscheer
patent: 5610589 (1997-03-01), Evans et al.
Hofsass Jeffery A.
Lee Benjamin C.
Rhea Robert K.
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