Patent US3628041A successfully refreshed from Google Patents.
US3628041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cranking motor automatic disconnect and lockout circuit
Assignee: Motors Liquidation Co
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Filing: 1970-11-23
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Granted: 1971-12-14
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Expires: 1990-11-23
Abstract
Abstract An electric cranking motor automatic disconnect and lockout circuit. The normally open contacts of a cranking motor solenoid operated switch are connected in series with the electric cranking motor across a source of direct current supply potential. Upon the closure of an electric switch, the source of direct current supply potential, applied across the gate-cathode electrodes of a first silicon controlled rectifier, triggers this device conductive through the anode-cathode electrodes to establish a circuit for base-emitter current flow through a first transistor. The conductive first transistor establishes an energizing circuit for the operating coil of an electric relay which, in turn, establishes an energizing circuit for the operating coil of the solenoid operated switch. The output potential of an electrical generator driven by the cranking motor armature is applied across the gate-cathode electrodes of a second silicon controlled rectifier. When the generator output potential is of sufficient magnitude to produce gate-cathode current through the second silicon controlled rectifier, the resulting anode-cathode current flow therethrough shunts base current from the first transistor to extinguish this device, thereby interrupting the energizing circuit for the operating coil of the electric relay and, in turn, the solenoid operated switch to provide automatic disconnect of the cranking motor upon engine start. A vibration transducer mounted upon the cranked engine produces an alternating current potential signal which triggers a second transistor conductive to shunt gate current from the first silicon controlled rectifier thereby preventing the retriggering of the first transistor while the engine is running to provide a lockout of the cranking motor.
Inventors
- 👤 Donald L Cummins
- 👤 Morris Esche
- 👤 Robert W Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:38
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/08; F02N11/0848; F02N11/10; F02N11/101; F02N11/105
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
375 words
An electric cranking motor automatic disconnect and lockout circuit comprising in combination with a source of direct current supply potential, an electric cranking motor connected thereacross through the normally open contacts of a solenoid operated switch having at least one operating coil and an associated engine cranked thereby, an electric relay having an operating coil, a movable contact and a stationary contact, a first transistor having a control electrode and two current carrying electrodes, means for connecting said operating coil of said electric relay across said source of direct current supply potential througH said current carrying electrodes of said first transistor, means for connecting said operating coil of said solenoid operated switch across said source of direct current supply potential through said movable contact and said stationary contact of said electric relay, a first silicon controlled rectifier having anode, cathode and gate electrodes, means for connecting said control electrode and a selected one of said current carrying electrodes of said first transistor across said source of direct current supply potential through said anodecathode electrodes of said first silicon controlled rectifier, a second silicon controlled rectifier having anode, cathode, and gate electrodes, means for producing a control potential of a magnitude which increases with the speed of the cranked engine, means for connecting said anode-cathode electrodes of said second silicon controlled rectifier in shunt across said control electrode and a selected one of said current carrying electrodes of said first transistor, means for applying said control potential across said gate-cathode electrodes of said second silicon controlled rectifier, a second transistor having a control and two current carrying electrodes, a resistor, means for connecting said current carrying electrodes of said second transistor and said resistor in series across said source of direct current supply potential, means for connecting said gate electrode of said first silicon controlled rectifier to the junction between said resistor and said current carrying electrodes of said second transistor, means for producing an alternating current potential signal in response to engine start, means for converting said alternating current potential signal to a series of square waveform potential signals, and means for applying said square waveform potential signals across said control electrode and a selected one of said current carrying electrodes of said second transistor.
Claim 2
Dependent Claim
375 words
An electric cranking motor automatic disconnect and lockout circuit comprising in combination with a source of direct current supply potential, an electric cranking motor connected thereacross through the normally open contacts of a solenoid operated switch having at least one operating coil and an associated engine cranked thereby, an electric relay having an operating coil, a movable contact and a stationary contact, a first transistor having a control electrode and two current carrying electrodes, means for connecting said operating coil of said electric relay across said source of direct current supply potential througH said current carrying electrodes of said first transistor, means for connecting said operating coil of said solenoid operated switch across said source of direct current supply potential through said movable contact and said stationary contact of said electric relay, a first silicon controlled rectifier having anode, cathode and gate electrodes, means for connecting said control electrode and a selected one of said current carrying electrodes of said first transistor across said source of direct current supply potential through said anodecathode electrodes of said first silicon controlled rectifier, a second silicon controlled rectifier having anode, cathode, and gate electrodes, means for producing a control potential of a magnitude which increases with the speed of the cranked engine, means for connecting said anode-cathode electrodes of said second silicon controlled rectifier in shunt across said control electrode and a selected one of said current carrying electrodes of said first transistor, means for applying said control potential across said gate-cathode electrodes of said second silicon controlled rectifier, a second transistor having a control and two current carrying electrodes, a resistor, means for connecting said current carrying electrodes of said second transistor and said resistor in series across said source of direct current supply potential, means for connecting said gate electrode of said first silicon controlled rectifier to the junction between said resistor and said current carrying electrodes of said second transistor, means for producing an alternating current potential signal in response to engine start, means for converting said alternating current potential signal to a series of square waveform potential signals, and means for applying said square waveform potential signals across said control electrode and a selected one of said current carrying electrodes of said second transistor.
Claim 3
Dependent Claim
340 words
An electric cranking motor automatic disconnect and lockout circuit comprising in combination with a source of direct current supply potential, an electric cranking motor connected thereacross through the normally open contacts of a solenoid operated switch having at least one operating coil and an associated engine cranked thereby, an electric relay having an operating coil, a movable contact and a stationary contact, a first transistor having base, collector and emitter electrodes, means for connecting said operating coil of said electric relay across said source of direct current supply potential through said collector-emitter electrodes of said first transistor, means for connecting said operating coil of said solenoid operated switch across said source of direct current supply potential through said movable contact and said stationary contact of said electric relay, a first silicon controlled rectifier having anode, cathode and gate electrodes, means for connecting said base-emitter electrodes of said first transistor across said source of direct current supply potential through said anode-cathode electrodes of said first silicon controlled rectifier, a second silicon controlled rectifier having anode, cathode, and gate electrodes, means for producing a control potential of a magnitude which increases with the speed of the cranked engine, means for connecting said anode-cathode electrodes of said second silicon controlled rectifier in shunt across said base-emitter electrodes of said first transistor, means for applying said control potential across said gate-cathode electrodes of said second silicon controlled rectifier, a second transistor having base, collector and emitter electrodes, a resistor, means for connecting said collector-emitter electrodes of said second transistor and said resistor in series across said source of direct current supply potential, means for connecting said gate electrode of said first silicon controlled rectifier to the junction between said resistor and said collector-emitter electrodes of said second transistor, means for produCing an alternating current potential signal in response to engine start, means for converting said alternating current potential signal to a series of square waveform potential signals, and means for applying said square waveform potential signals across said base-emitter electrodes of said second transistor.
Claim 4
Dependent Claim
340 words
An electric cranking motor automatic disconnect and lockout circuit comprising in combination with a source of direct current supply potential, an electric cranking motor connected thereacross through the normally open contacts of a solenoid operated switch having at least one operating coil and an associated engine cranked thereby, an electric relay having an operating coil, a movable contact and a stationary contact, a first transistor having base, collector and emitter electrodes, means for connecting said operating coil of said electric relay across said source of direct current supply potential through said collector-emitter electrodes of said first transistor, means for connecting said operating coil of said solenoid operated switch across said source of direct current supply potential through said movable contact and said stationary contact of said electric relay, a first silicon controlled rectifier having anode, cathode and gate electrodes, means for connecting said base-emitter electrodes of said first transistor across said source of direct current supply potential through said anode-cathode electrodes of said first silicon controlled rectifier, a second silicon controlled rectifier having anode, cathode, and gate electrodes, means for producing a control potential of a magnitude which increases with the speed of the cranked engine, means for connecting said anode-cathode electrodes of said second silicon controlled rectifier in shunt across said base-emitter electrodes of said first transistor, means for applying said control potential across said gate-cathode electrodes of said second silicon controlled rectifier, a second transistor having base, collector and emitter electrodes, a resistor, means for connecting said collector-emitter electrodes of said second transistor and said resistor in series across said source of direct current supply potential, means for connecting said gate electrode of said first silicon controlled rectifier to the junction between said resistor and said collector-emitter electrodes of said second transistor, means for produCing an alternating current potential signal in response to engine start, means for converting said alternating current potential signal to a series of square waveform potential signals, and means for applying said square waveform potential signals across said base-emitter electrodes of said second transistor.
Claim 5
Dependent Claim
340 words
An electric cranking motor automatic disconnect and lockout circuit comprising in combination with a source of direct current supply potential, an electric cranking motor connected thereacross through the normally open contacts of a solenoid operated switch having at least one operating coil and an associated engine cranked thereby, an electric relay having an operating coil, a movable contact and a stationary contact, a first transistor having base, collector and emitter electrodes, means for connecting said operating coil of said electric relay across said source of direct current supply potential through said collector-emitter electrodes of said first transistor, means for connecting said operating coil of said solenoid operated switch across said source of direct current supply potential through said movable contact and said stationary contact of said electric relay, a first silicon controlled rectifier having anode, cathode and gate electrodes, means for connecting said base-emitter electrodes of said first transistor across said source of direct current supply potential through said anode-cathode electrodes of said first silicon controlled rectifier, a second silicon controlled rectifier having anode, cathode, and gate electrodes, an electrical generator having an armature driven by said cranking motor and output terminals, means for connecting said anode-cathode electrodes of said second silicon controlled rectifier in shunt across said base-emitter electrodes of said first transistor, means for connecting said gate-cathode electrodes of said second silicon controlled rectifier across said output terminals of said electrical generator, a second transistor having base, collector and emitter electrodes, a resistor, means for connecting said collector-emitter electrodes of said second transistor and said resistor in series across said source of direct current supply potential, means for connecting said gate electrode of said first silicon controlled rectifier to the junction between said resistor and said collector-emitter electrodes of said second transistor, means for producing an alternating current potential signal in response to engine start, means for converting said alternating current potential signal to a series of square waveform potential signals, and means for applying said square waveform potential signals across said base-emitter electrodes of said second transistor.
Claim 6
Dependent Claim
340 words
An electric cranking motor automatic disconnect and lockout circuit comprising in combination with a source of direct current supply potential, an electric cranking motor connected thereacross through the normally open contacts of a solenoid operated switch having at least one operating coil and an associated engine cranked thereby, an electric relay having an operating coil, a movable contact and a stationary contact, a first transistor having base, collector and emitter electrodes, means for connecting said operating coil of said electric relay across said source of direct current supply potential through said collector-emitter electrodes of said first transistor, means for connecting said operating coil of said solenoid operated switch across said source of direct current supply potential through said movable contact and said stationary contact of said electric relay, a first silicon controlled rectifier having anode, cathode and gate electrodes, means for connecting said base-emitter electrodes of said first transistor across said source of direct current supply potential through said anode-cathode electrodes of said first silicon controlled rectifier, a second silicon controlled rectifier having anode, cathode, and gate electrodes, an electrical generator having an armature driven by said cranking motor and output terminals, means for connecting said anode-cathode electrodes of said second silicon controlled rectifier in shunt across said base-emitter electrodes of said first transistor, means for connecting said gate-cathode electrodes of said second silicon controlled rectifier across said output terminals of said electrical generator, a second transistor having base, collector and emitter electrodes, a resistor, means for connecting said collector-emitter electrodes of said second transistor and said resistor in series across said source of direct current supply potential, means for connecting said gate electrode of said first silicon controlled rectifier to the junction between said resistor and said collector-emitter electrodes of said second transistor, means for producing an alternating current potential signal in response to engine start, means for converting said alternating current potential signal to a series of square waveform potential signals, and means for applying said square waveform potential signals across said base-emitter electrodes of said second transistor.
Claim 7
Dependent Claim
347 words
An electric cranking motor automatic disconnect and lockout circuit comprising in combination with a source of direct current supply potential, an electric cranking motor connected thereacross through the normally open contacts of a solenoid operated switch having at least one operating coil and an associated engine cranked thereby, an electric relay having an operating coil, a movable contact a stationary contact, a first transistor having base, collector and emitter electrodes, means for connecting said operating coil of said electric relay across said source of direct current supply potential through said collector-emitter electrodes of said first transistor, means for connecting said operating coil of said solenoid operated switch across said source of direct current supply potential through said movable contact and said stationary contact of said electric relay, a first silicon controlled rectifier having anode, cathode and gate electrodes, means for connecting said base-emitter electrodes of said first transistor across said source of direct current supply potential through said anode-cathode electrodes of said first silicon controlled rectifier, a second silicon controlled rectifier having anode, cathode, and gate electrodes, an electrical generator having an armature driven bY said cranking motor and output terminals, means for connecting said anode-cathode electrodes of said second silicon controlled rectifier in shunt across said base-emitter electrodes of said first transistor, means for connecting said gate-cathode electrodes of said second silicon controlled rectifier across said output terminals of said electrical generator, a second transistor having base, collector and emitter electrodes, a resistor, means for connecting said collector-emitter electrodes of said second transistor and said resistor in series across said source of direct current supply potential, means for connecting said gate electrode of said first silicon controlled rectifier to the junction between said resistor and said collector-emitter electrodes of said second transistor, a vibration transducer mounted upon said associated cranked engine for producing an alternating current potential signal in response to engine start, means for converting said alternating current potential signal to a series of square waveform potential signals, and means for applying said square waveform potential signals across said base-emitter electrodes of said second transistor.
Claim 8
Dependent Claim
347 words
An electric cranking motor automatic disconnect and lockout circuit comprising in combination with a source of direct current supply potential, an electric cranking motor connected thereacross through the normally open contacts of a solenoid operated switch having at least one operating coil and an associated engine cranked thereby, an electric relay having an operating coil, a movable contact a stationary contact, a first transistor having base, collector and emitter electrodes, means for connecting said operating coil of said electric relay across said source of direct current supply potential through said collector-emitter electrodes of said first transistor, means for connecting said operating coil of said solenoid operated switch across said source of direct current supply potential through said movable contact and said stationary contact of said electric relay, a first silicon controlled rectifier having anode, cathode and gate electrodes, means for connecting said base-emitter electrodes of said first transistor across said source of direct current supply potential through said anode-cathode electrodes of said first silicon controlled rectifier, a second silicon controlled rectifier having anode, cathode, and gate electrodes, an electrical generator having an armature driven bY said cranking motor and output terminals, means for connecting said anode-cathode electrodes of said second silicon controlled rectifier in shunt across said base-emitter electrodes of said first transistor, means for connecting said gate-cathode electrodes of said second silicon controlled rectifier across said output terminals of said electrical generator, a second transistor having base, collector and emitter electrodes, a resistor, means for connecting said collector-emitter electrodes of said second transistor and said resistor in series across said source of direct current supply potential, means for connecting said gate electrode of said first silicon controlled rectifier to the junction between said resistor and said collector-emitter electrodes of said second transistor, a vibration transducer mounted upon said associated cranked engine for producing an alternating current potential signal in response to engine start, means for converting said alternating current potential signal to a series of square waveform potential signals, and means for applying said square waveform potential signals across said base-emitter electrodes of said second transistor.
References Cited (Backward Citations)
US3514621A
Cited
US3530846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |