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US 4,227,132 AGranted
Thyristor interlock and indicator light circuit for electric vehicles
AssigneeOutboard Marine Corporation
InventorsDavid T. Cavil, Gerald N. McAuliffe
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AssigneeOutboard Marine Corporation
InventorsDavid T. Cavil, Gerald N. McAuliffe
Estimating the term…
Disclosed herein is a thyristor interlock circuit for energizing a DC motor, the circuit comprising a solenoid switch including an actuating coil, the solenoid switch and the motor being connected in series relation between the opposed terminals of the DC source, a thyristor having an anode, a cathode, and a gate, an ignition switch which connects the anode to one terminal of the DC source, a start switch normally biased to an open position, the start switch being linked to close after closing of the ignition switch, the start switch being connected to the one terminal of the DC source and to the gate, a resistor for limiting the gate current, a controller having a switch with two terminals, and a sub-circuit comprising a first lead including a first resistor and connecting the first resistor and the actuating coil in series relation between the thyristor cathode and the other terminal of the DC source, a second lead connecting one terminal of the controller switch to the start switch and the gate, a third lead connecting the other terminal of the controller switch to the first lead between the first resistor and the actuating coil, a fourth lead including a second resistor and a diode connected in parallel relation, the fourth lead connecting the resistor between the gate and the thyristor cathode, and connecting the cathode of the diode to the gate and the anode of the diode to the thyristor cathode, the sub-circuit forcing an operator to close the ingition switch and the start switch in order to gate the thyristor and then to close the controller switch in order to energize the actuating coil and the DC motor. Also disclosed herein is an interlock circuit modified to include indicator lights and to force an indicator light check.
A thyristor interlock circuit for energizing a DC motor, which circuit comprises a solenoid switch including an actuating coil, means for connecting said solenoid switch and the motor in series relation between the terminals of a DC source, a thyristor having an anode, a cathode, and a gate, means for connecting said anode to one terminal of the DC source, a first switch, means for connecting said first switch to the one terminal of the DC source and to said gate, a second switch including two terminals, and sub-circuit means for connecting said cathode and said actuating coil in series relation to the other terminal of the DC source, and for connecting one terminal of said second switch to said first switch and said gate, and for connecting the other terminal of said second switch to said cathode and said actuating coil, said sub-circuit means forcing an operator to sequentially close said first switch in order to gate said thyristor and close said second switch in order to energize said actuating coil and the DC motor.
A vehicle including a source of direct current having opposed terminals, a DC motor, and a thyristor interlock circuit for energizing said DC motor, said circuit comprising a solenoid switch including an actuating coil, means for connecting said solenoid switch and said motor in series relation between said opposed terminals of said DC source, a thyristor having an anode, a cathode, and a gate, means including an ignition switch for connecting said anode to one terminal of said DC source, a start switch normally biased to an open position, said start switch being linked to close after closing of said ignition switch, means for connecting said start switch to the one terminal of said DC source and to said gate and including resistance means for limiting the gate current, a controller having a switch with two terminals, and sub-circuit means comprising a first lead including a first resistor and connecting said resistor and said actuating coil in series relation between said thyristor cathode and said other terminal of said DC source, a second lead connecting one terminal of said controller switch to said start switch and said gate, a third lead connecting the other terminal of said controller switch to said first lead between said first resistor and said actuating coil, a fourth lead including a second resistor and a diode connected in parallel relation, said fourth lead connecting said resistor between said gate and said thyristor cathode, and connecting the cathode of said diode to said gate and the anode of said diode to said thyristor cathode, said sub-circuit means forcing an operator to close said ignition switch and said start switch in order to gate said thyristor and then to close said controller switch in order to energize said actuating coil and said DC motor.
A thyristor interlock circuit for energizing a DC motor, which circuit comprises a solenoid switch including an actuating coil, means for connecting said solenoid switch and the motor in series relation between the terminals of a DC source, a thyristor having an anode, a cathode, and a gate, means including a first switch connected in series relation between said anode and one terminal of the DC source, a transmission switch linked to a vehicle transmission so as to be open when the vehicle is enabled in reverse and so as to be closed when the vehicle is not enabled in reverse, means for connecting said transmission switch to the one terminal of the DC source and to said gate, a controller switch including two terminals, and sub-circuit means for connecting said cathode and said actuating coil in series relation to the other terminal of the DC source, and for connecting one terminal of said controller switch through a resistor to said transmission switch and to said gate, and for connecting the other terminal of said controller switch to said cathode and said actuating coil, said sub-circuit means forcing an operator to close said first switch and said transmission switch in order to gate said thyristor and to close said controller switch in order to energize said actuating coil and the DC motor.
A vehicle including a source of direct current having opposed terminals, a transmission, a DC motor, and a thyristor interlock circuit for energizing a DC motor, comprising a solenoid switch including an actuating coil, means for connecting said solenoid switch and said motor in series relation between said terminals of said DC source, a thyristor having an anode, a cathode, and a gate, means including an ignition switch and a seat switch connected in series relation between said anode and one terminal of the DC source, a transmission switch linked to said vehicle transmission so as to be open when the vehicle is enabled in reverse and so as to be closed when the vehicle is not enabled in reverse, means including a current limiting resistance for connecting said transmission switch to the one terminal of the DC source and to said gate, a controller switch including two terminals, and sub-circuit means comprising a first lead including a first resistor connecting said actuating coil in series relation between said thyristor cathode and the other terminal of the DC source, a second lead including a second resistor connecting one terminal of said controller switch to said transmission switch and to said gate, a third lead connecting the other terminal of said controller switch to said first lead between said first resistor and said actuating coil, and a fourth lead connecting said second resistor between said gate and said thyristor cathode, said sub-circuit means forcing an operator to close said ignition and seat switch and to shift from reverse into one of forward and neutral in order to gate said thyristor and to close said controller switch in order to energize said actuating coil and said DC motor.
A thyristor interlock circuit for energizing a DC motor, which circuit comprises a solenoid switch including an actuating coil, means for connecting said solenoid switch and the motor in series relation between the terminals of a DC source, a thyristor having an anode, a cathode, and a gate, means for connecting said anode to one terminal of the DC source, a first switch, means for connecting said first switch to the one terminal of the DC source and to said gate, a second switch including two terminals, and sub-circuit means connected in circuit with said thyristor and said actuating coil and said first and second switches for forcing an operator to sequentially close said first and second switches in order to energize the DC motor.
A thyristor interlock circuit for energizing a DC motor, which circuit comprises a solenoid switch including an actuating coil, means for connecting said solenoid switch and the motor in series relation between the terminals of a DC source, a thyristor having an anode, a cathode, and a gate, means including a first switch connected in series relation between said anode and one terminal of the DC source, a transmission switch linked to a vehicle transmission so as to be open when the vehicle is enabled in reverse and so as to be closed when the vehicle is not enabled in reverse, means for connecting said transmission switch to the one terminal of the DC source and to said gate, a controller switch including two terminals, and sub-circuit means connected in circuit with said thyristor and said actuating coil and said controller and transmission switches for forcing an operator to close said first switch and said transmission switch in order to gate said thyristor and to close said controller switch in order to energize said actuating coil and the DC motor.
Dependencies are inferred from the claim text.