Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1989-11-13
1991-02-26
Kamen, Noah P.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
123196S, F02B 7700
Patent
active
049953575
ABSTRACT:
An ignition-powered engine shut-off circuit is provided for power-driven apparatus such as lawn mowers, pumps, generators, tractors and the like. The shut-off circuit preferably includes a first switch, such as a low oil or toggle switch, which is activated when a particular condition exists. The circuit also includes an electronic switch that is subject to the control of a switch control means. When the first switch senses that a particular condition exists, the switch control means gates on the electronic switch, grounding the ignition pulses and shutting off the engine. The first switch is preferably a reed switch used to sense low oil levels, and the electronic switch is preferably a high-power SCR or other thyristor. An indicator means consisting of an LED and a shunt resistor indicates that the ignition pulses are being grounded.
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Gonnering John B.
Tharman Paul A.
Briggs & Stratton Corporation
Kamen Noah P.
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