Seat cushion switch with delay circuit

Details Seat cushion switch with delay circuit Seat cushion switch with delay circuit

1990-05-08

1992-06-09

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural load circuit systems

Common conductor or return type

200 85A, 307116, 3071414, 340529, 340667, H01H 314

Patent

active

051209802

ABSTRACT:
A general purpose time delay weight activated switch is disclosed. A foam seat cushion contains wire mesh electrical switch closing contacts. Sitting or rising from the cushion opens and closes the switch. A solid state adjustable timer is also imbedded in the cushion, or adjacent to the cushion. Its purpose is to delay the opening of the switch several seconds. An ideal application for the device is to automaticlly lock an emergency brake in a delivery van. The driver leaving the parked vehicle automatically locks the parking brake or vehicle brakes when leaving the vehicle when the present invention is combined with a parking brake or vehicle brake locking means. The invention's delay circuit allows the driver to bounce up and down on a bumpy road without setting off the switch. Other uses for this special purpose seat cushion include railroad, farm equipment, industrial and power boat safety systems.

REFERENCES:
patent: 3487451 (1969-12-01), Fontaine
patent: 3704352 (1972-11-01), Fontaine
patent: 3718791 (1973-02-01), Szablowski
patent: 3860773 (1975-01-01), Fontaine
patent: 3893698 (1975-07-01), Fontaine
patent: 4137116 (1979-01-01), Miller
patent: 4661664 (1987-04-01), Miller
patent: 4844196 (1989-07-01), Clevenger, Jr. et al.

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