G - Physics – 05 – B
Patent
G - Physics
05
B
342/13
G05B 11/32 (2006.01) F01M 1/22 (2006.01) F01P 5/14 (2006.01) F02B 3/06 (2006.01)
Patent
CA 1066389
ABSTRACT OF THE DISCLOSURE This invention relates to a safety apparatus for causing an internal combustion engine to stop automatically when irregularities occur in the oil pressure or in the water temperature. The apparatus includes an oil pressure- actuated switch having normally closed contacts which are held open when an oil-pressure of the engine is above a minimum value and a water temperature-actuated switch having normally open contacts which are closed when the temperature of a cooling liquid for the engine reaches a high temperature. An electrical relay is provided and has an armature winding and a pair of normally open contacts which are closed by energization of the armature winding. The oil pressure- actuated switch and the water temperature-actuated switch are connected in parallel to one side of the armature winding for controlling energization of the relay. A normally open electrically operated valve is connected in series with a fuel line to the engine and the valve is electrically con- nected in series with the relay contact. The apparatus also includes a manual switch which is normally closed and which is connected in series with the relay contacts and the elec- trically operated valve for disabling the operation of the valve to allow the engine to be started, the manual switch being free of any starter circuit so that the engine can be started and operated in the event of an irregularity when the manual switch is opened.
253512
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