Controlled and energization circuit for electrically heated vehicle windows
First Claim
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1. A circuit for use in a vehicle having an engine operated electrical energy generator with rotor windings and a field winding fed from a voltage regulator, at least one window provided with an electrical resistance heating element, and a battery;
- the circuit comprising;
first switching means operable to electrically interconnect the heating element to the generator output;
second switching means normally occupying a first state electrically connecting the generator output to the battery and to the voltage regulator, and switchable to a second state in which the battery is disconnected from the generator output and the field winding is electrically connected to the battery;
third switching means; and
a control circuit responsive to manual actuation of said third switching means to controllably switch said second switching means to said second state for a period of time and thereafter to return the second switching means to said first state.
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Abstract
A control and energization circuit for applying the vehicle alternator output directly to the resistive window heaters is disclosed. By disconnecting the alternator output from the vehicle battery, thereby temporarily interrupting the charging cycle of the battery, substantially the full alternator output may be applied to the window heaters to deice the vehicle windows.
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Citations
9 Claims
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1. A circuit for use in a vehicle having an engine operated electrical energy generator with rotor windings and a field winding fed from a voltage regulator, at least one window provided with an electrical resistance heating element, and a battery;
- the circuit comprising;
first switching means operable to electrically interconnect the heating element to the generator output; second switching means normally occupying a first state electrically connecting the generator output to the battery and to the voltage regulator, and switchable to a second state in which the battery is disconnected from the generator output and the field winding is electrically connected to the battery; third switching means; and a control circuit responsive to manual actuation of said third switching means to controllably switch said second switching means to said second state for a period of time and thereafter to return the second switching means to said first state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- the circuit comprising;
Specification