Control circuit for a multiple power level solenoid

Details Control circuit for a multiple power level solenoid Control circuit for a multiple power level solenoid

H - Electricity

01

F

272/93, 341/97

H01F 7/18 (2006.01) A63F 7/02 (2006.01) A63F 7/26 (2006.01) H01H 47/04 (2006.01)

Patent

CA 2033534

Abstract of The Disclosure The control circuit of the invention consists of a solenoid which generates a high propelling force when the player closes a flipper switch. A primary timer circuit decreases the power when the flipper switch is held closed by a player for more than a predetermined length of time such that only a lower holding power is delivered. Thereafter, if the flipper begins to slip from its holding or static position, a sensor activates a maintenance timer circuit which again generates the higher propelling force. The maintenance timer circuit lowers the power after another predetermined length of time has expired. If the flipper again begins to slip, the maintenance timer circuit is reactivated and the cycle is repeated. Once the player releases the flipper switch, the solenoid is de-energized and both timer circuits are reset until such time as the player again depresses the flipper switch. In this manner, only the power necessary to maintain the desired mode of operation is delivered to the solenoid such that overheating and failure of the solenoid is avoided.

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