Central oil feeding automatic control device for vehicles

Claim 1

A central automatic control device for supplying oil to a vehicle comprising an oil supply pump; an electromagnetically controlled valve for controlling the output of said pump; and an electrical control circuit comprising a cam-operated switch opened and closed responsive to the movement of a cam which rotates with the drive shaft of the vehicle, a further switch including a normally closed, fixed contact, a normally open, fixed contact and a relay-controlled, movable contact for opening and closing said normally open contact and said normally closed contact, means for connecting said movable contact to ground through said cam-operated switch, an electromagnetic relay coil for controlling movement of said movable contact, a further electromagnetic coil for controlling actuation of said valve, a bimetal coil, means for connecting said further electromagnetic coil and said bimetal coil in parallel and for connecting one side of the parallel-connected coils to said normally closed contact of said further switch, a DC source, means for connecting the other side of said parallel-connected coils to the nongrounded side of said source, means for connecting the first mentioned electromagnetic relay coil between the said normally open contact of said further switch and said nongrounded side of said source, a hydraulic pressure responsive switch actuated responsive to the pressure output of said oil supply pump, and a bimetal switch actuated responsive to said bimetal coil and connected between said normally open contact of said further switch and ground for, when actuated, limiting current flow through said further electromagnetic coil.