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US 6,147,466 AGranted
Synchronization system for motors
AssigneeCommercial Vehicle Systems, Inc.
InventorSteven J. Stronczek
Life of this patent
Estimating the term…
Abstract
A synchronization system according to the present invention includes a signal generator that provides a "RUN" signal simultaneously to two or more windshield wiper motors in response to simultaneous receipt of position signals generated by the motors. Each motor generates a position signal when the windshield wiper controlled by the motor is at a predetermined position. A gate circuit monitors the output of each motor to determine whether the motor is in the predetermined position. The gate circuit provides a trigger signal to the signal generator of the present invention only when each motor outputs a position signal. The trigger signal causes the signal generator to produce a subsequent "RUN" signal initiating another wipe cycle. Accordingly, the motors begin each cycle in synchronization.
Claims78
A windshield wiper control system comprising:
- a first motor connected to a first wiper,
- a first detector that generates a first position signal when the first wiper is in a predetermined position;
- a second motor connected to a second wiper,
- a second detector that generates a second position signal when the second wiper is in a predetermined position;
- a synchronizer connected to the first and second detectors, the synchronizer simultaneously enabling the first and second motors in response to the coexistence of both the first and second position signals, thereby initiating a wipe cycle only when the first wiper is in its predetermined position and the second wiper is in its predetermined position.
2 more elements
A system for simultaneously enabling a first and a second motor connected to a pair of windshield wipers thereby synchronizing the movement of the windshield wipers, each of the first and second motors generating a position signal when its respective windshield wiper is in a predetermined position, the system comprising:
- a gate circuit having inputs to receive the position signals, the gate circuit generating a trigger signal when the position signals coexist;
- and
- a signal generator connected to the gate circuit, the signal generator outputting a run signal upon receipt of the trigger signal to simultaneously enable the pair of motors, thereby initiating a synchronized wipe cycle.
A synchronization system comprising:
- a first motor which moves when enabled through a cycle from a starting position to a second position and back to the starting position, the first motor causing a first position signal when in a first predetermined position;
- a second motor which moves when enabled through a cycle from a starting position to a second position and back to the starting position, the second motor causing a second position signal when in a second predetermined position;
- and
- a signal generator connected to the first and the second motors, the signal generator simultaneously enabling the first and second motors to move through their respective cycles in response to the coexistence of both the first and second position signals.
1 more element
A windshield wiper control system comprising:
- first motor means for moving a first wiper, the first motor means generating a first position signal when the first wiper is in a predetermined position;
- second motor means for moving a second wiper, the second motor means generating a second position signal when the second wiper is in a predetermined position;
- gate circuit means connected to the first motor means and the second motor mens for receiving the first and second position signals, the gate circuit means generating a trigger signal upon the coexistence of both the first and second position signals;
- signal generator means connected between the gate circuit means and the first and second motor means for simultaneously enabling the first and second motor means upon receiving the trigger signal thereby initiating a wipe cycle only when the first wiper is in its predetermined position and the second wiper is in its predetermined position;
- and
- switch means connected to the first and second motor means for controlling the speed of operation of the first and second motor means.
3 more elements
A windshield wiper control system comprising:
- a first motor connected to a first wiper;
- a first detector that generates a first position signal when the first wiper is in a predetermined position;
- a second motor connected to a second wiper;
- a second detector that generates a second position signal when the second wiper is in a predetermined position;
- a synchronizer connected to the first and second detectors, the synchronizer enabling the first and second motors in response to the presence of both the first and second position signals, thereby initiating a wipe cycle only when the first wiper is in its predetermined position and the second wiper is in its predetermined position;
- a first switch connected between the synchronizer and the first motor and a second switch connected between the synchronizer and the second motor, the synchronizer outputting a run signal to the first and second switches in response to the presence of both the first and second position signals, the first and second switches enabling the first and second motors, respectively, upon receiving the run signal;
- and
- a gate circuit connected to the first and second detectors to receive the first and second position signals, the gate circuit outputting a trigger signal to the synchronizer upon receiving both the first and second position signals;
- the gate circuit including a logic gate connected to the first detector for receiving the first position signal, and the second detector for receiving the second position signal;
- the logic gate being a NOR gate, the gate circuit including a first invertor and a second invertor cascaded with the logic gate, the first invertor being configured to invert the output of the logic gate, the second invertor being configured to invert the output of the first inverter.
7 more elements
A synchronizer system comprising:
- a first motor which moves when enabled through a cycle from a starting position to a second position and back to the starting position, the first motor causing a first position signal when in a first predetermined position;
- a second motor which moves when enabled through a cycle from a starting position to a second position and back to the starting position, the second motor causing a second position signal when in a second predetermined position;
- a signal generator connected to the first and the second motors, the signal generator enabling the first and second motors to move through their respective cycles in response to the simultaneous presence of both the first and second position signals;
- and
- a gate circuit connected to the first and second motors for receiving the first and second position signals, the gate circuit outputting a trigger signal to the signal generator upon simultaneous receipt of the first and second position signals, thereby causing the signal generator to enable the first and second motors;
- the gate circuit including a first NOR gate having an output, a first input connected to the first motor for receiving the first position signal, and a second input connected to the second motor for receiving the second position signal.
3 more elements
Dependencies are inferred from the claim text.