US3866960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine cranking motor energizing circuit
Assignee: Motors Liquidation Co
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Filing: 1974-02-04
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Granted: 1975-02-18
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Expires: 1994-02-04
Abstract
Abstract The pull-in coil of a cranking motor solenoid, having pull-in and hold-in coils, and a resistor connected in parallel therewith are connected in series with the cranking motor of an internal combustion engine electrical crqnking system. Upon the energization of the cranking motor solenoid, the solenoid aramture is actuated in a direction to effect the operation, through a shift mechanism, of the cranking motor pinion gear, slidably mounted upon the cranking motor shaft, into engagement with the cranking gear of the engine. In the event of the abutment of the teeth of the pinion and cranking gears, the cranking motor is energized at low power through the parallel combination of the solenoid pull-in coil and resistor to provide sufficient torque to slowly rotate the pinion gear until the teeth thereof are in register with and, consequently, mesh with, the teeth of the cranking gear. Upon the meshing of the teeth of the pinion and cranking gears, the solenoid armature is actuated to the full extent of its travel to a position at which an electrically conductive member carried thereby bridges two electrical contacts located in the cranking motor solenoid housing to complete the energizing circuit of a power relay which connects the cranking motor directly across the direct current potential source.
Inventors
- 👤 Satish M Chohan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:39
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/08; F02N11/0851; F02N11/087; Y; Y10; Y10T; Y10T74/00; Y10T74/13
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
353 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including an electric cranking motor having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended motor shaft and a shift mechanism operable to axially slide the pinion gear in one direction to engge and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a Source of direct current potential: an electrical solenoid having a pull-in coil connected in series with said cranking motor, a hold-in coil, an armature member in operative engagement with said shift mechanism which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of said pinion and engine cranking gears, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across said pull-in coil; an electrical switching device of the type having normally open current carrying elements operable to the electrical circuit closed condition in response to an electrical signal; means for connecting said current carrying elements of said electrical switching device and said cranking motor in series across said source of direct current potential; a relay having two movable and stationary contact pairs and an operating coil; an energizing circuit including one of said movable and stationary contact pairs of said second relay for each said pull-in coil and parallel connected resistor and said cranking motor in series and said hold-in winding; an electrical circuit including said same one movable and stationary contact pair of said second relay, said pair of electrical contacts of said solenoid and the other said movable and stationary contact pair of said second relay through which an electrical signal may be supplied to said electrical switching device; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 2
Dependent Claim
353 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including an electric cranking motor having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended motor shaft and a shift mechanism operable to axially slide the pinion gear in one direction to engge and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a Source of direct current potential: an electrical solenoid having a pull-in coil connected in series with said cranking motor, a hold-in coil, an armature member in operative engagement with said shift mechanism which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of said pinion and engine cranking gears, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across said pull-in coil; an electrical switching device of the type having normally open current carrying elements operable to the electrical circuit closed condition in response to an electrical signal; means for connecting said current carrying elements of said electrical switching device and said cranking motor in series across said source of direct current potential; a relay having two movable and stationary contact pairs and an operating coil; an energizing circuit including one of said movable and stationary contact pairs of said second relay for each said pull-in coil and parallel connected resistor and said cranking motor in series and said hold-in winding; an electrical circuit including said same one movable and stationary contact pair of said second relay, said pair of electrical contacts of said solenoid and the other said movable and stationary contact pair of said second relay through which an electrical signal may be supplied to said electrical switching device; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 3
Dependent Claim
340 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including an electric cranking motor having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft and a shift mechanism operable to axially slide the pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electrical solenoid having a pull-in coil connected in series with said cranking motor, a hold-in coil, an armature member in operative engagement with said shift mechanism which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of said pinion and engine cranking gears, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across said pull-in coil; a first relay having a movable and stationary contact pair and an operating coil; means for connecting said movable and stationary contact pair of said first relay and said cranking motor in series across said source of direct current potential; a second relay having two movable and stationary contact pairs and an operating coil; an energizing circuit including one of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor and said cranking motor and for said hold-in coil; an energizing circuit including said same one movable and stationary contact pair of said second relay, said pair of electrical contacts of said solenoid and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 4
Dependent Claim
340 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including an electric cranking motor having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft and a shift mechanism operable to axially slide the pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electrical solenoid having a pull-in coil connected in series with said cranking motor, a hold-in coil, an armature member in operative engagement with said shift mechanism which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of said pinion and engine cranking gears, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across said pull-in coil; a first relay having a movable and stationary contact pair and an operating coil; means for connecting said movable and stationary contact pair of said first relay and said cranking motor in series across said source of direct current potential; a second relay having two movable and stationary contact pairs and an operating coil; an energizing circuit including one of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor and said cranking motor and for said hold-in coil; an energizing circuit including said same one movable and stationary contact pair of said second relay, said pair of electrical contacts of said solenoid and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 5
Dependent Claim
396 words
An internal combustion engine cranking motor energizing circuit comprising in combustion with a crAnking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solenoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having a movable and stationary contact pair and an operating coil; means for connecting said movable and stationary contact pair of said first relay and said two cranking motors across said source of direct current potential: a second relay having two movable and stationary contact pairs and an operating coil; an energizing circuit including one of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same one of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 6
Dependent Claim
396 words
An internal combustion engine cranking motor energizing circuit comprising in combustion with a crAnking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solenoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having a movable and stationary contact pair and an operating coil; means for connecting said movable and stationary contact pair of said first relay and said two cranking motors across said source of direct current potential: a second relay having two movable and stationary contact pairs and an operating coil; an energizing circuit including one of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same one of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 7
Dependent Claim
413 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solenoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil connected in series with the said cranking motor to which it corresponds, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having a movable and stationary contact pair and an operating coil; means for connecting said movable and stationary contact pair of said first relay and said two cranking motors in series across said source of direct current potential: a second relay having two movable and stationary contact pairs and an operating coil; an energizing circuit including one of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid, in that order, and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same one of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 8
Dependent Claim
413 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solenoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil connected in series with the said cranking motor to which it corresponds, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having a movable and stationary contact pair and an operating coil; means for connecting said movable and stationary contact pair of said first relay and said two cranking motors in series across said source of direct current potential: a second relay having two movable and stationary contact pairs and an operating coil; an energizing circuit including one of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid, in that order, and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same one of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 9
Dependent Claim
408 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solenoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil connected in series with the said cranking motor to which it corresponds, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having a movable and stationary contact pair and an operating coil; means for connecting said movable and stationary contact pair of said first relay and said two cranking motors across said source of direct current potential: a second relay having three movable and stationary contact pairs and an operating coil; an energizing circuit including two of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same two of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 10
Dependent Claim
408 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solenoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil connected in series with the said cranking motor to which it corresponds, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having a movable and stationary contact pair and an operating coil; means for connecting said movable and stationary contact pair of said first relay and said two cranking motors across said source of direct current potential: a second relay having three movable and stationary contact pairs and an operating coil; an energizing circuit including two of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same two of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 11
Dependent Claim
424 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solEnoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil connected in series with the said cranking motor to which it corresponds, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having two movable and stationary contact pairs and an operating coil; means for connecting one of said movable and stationary contact pairs of said first relay, said two cranking motors and the other one of said movable and stationary contact pairs of said first relay across said source of direct current potential: a second relay having three movable and stationary contact pairs and an operating coil; an energizing circuit including two of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same two of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 12
Dependent Claim
424 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solEnoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil connected in series with the said cranking motor to which it corresponds, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having two movable and stationary contact pairs and an operating coil; means for connecting one of said movable and stationary contact pairs of said first relay, said two cranking motors and the other one of said movable and stationary contact pairs of said first relay across said source of direct current potential: a second relay having three movable and stationary contact pairs and an operating coil; an energizing circuit including two of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same two of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 13
Dependent Claim
433 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solenoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil connected in series with the said cranking motor to which it corresponds, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having two movable and stationary contact pairs and an operating coil; means for connecting one of said movable and stationary contact pairs of said first relay, said two cranking motors and the other one of said movable and stationary contact pairs of said first relay in series across said source of direct current potential, in that order; a second relay having three movable and stationary contact pairs and an operating coil; an energizing circuit including two of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid, in that order, and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same two of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both of said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
Claim 14
Dependent Claim
433 words
An internal combustion engine cranking motor energizing circuit comprising in combination with a cranking system including two electric cranking motors, each having an extended shaft, a pinion gear slidably mounted upon and rotated by the extended shaft of each motor and a shift mechanism for each motor operable to axially slide the corresponding pinion gear in one direction to engage and in an opposite direction to disengage the pinion gear and the cranking gear of the associated internal combustion engine and a source of direct current potential: an electric solenoid corresponding to each of said cranking motors, each of said solenoids having a pull-in coil connected in series with the said cranking motor to which it corresponds, a hold-in coil, an armature member in operative engagement with the said shift mechanism for the motor to which it corresponds which is operated to a first position by a spring and to a second position upon the energization of said pull-in and hold-in coils to effect, respectively, the disengagement and engagement of the corresponding said pinion gear and engine cranking gear, an electrically conductive member carried by said armature and a pair of electrical contacts bridged by said electrically conductive member when said armature is operated to said second position; a resistor connected in parallel across the said pull-in coil of each of said electric solenoids; a first relay having two movable and stationary contact pairs and an operating coil; means for connecting one of said movable and stationary contact pairs of said first relay, said two cranking motors and the other one of said movable and stationary contact pairs of said first relay in series across said source of direct current potential, in that order; a second relay having three movable and stationary contact pairs and an operating coil; an energizing circuit including two of said movable and stationary contact pairs of said second relay for each the series combination of said pull-in coil and parallel connected resistor of one of said solenoids, said two cranking motors and said pull-in coil and parallel connected resistor of said second solenoid, in that order, and the series combination of said hold-in coil of both said solenoids; an energizing circuit including said same two of said movable and stationary contact pairs of said second relay, said pair of electrical contacts of both of said solenoids and the other said movable and stationary contact pair of said second relay for said operating coil of said first relay; an electric crank switch; and an energizing circuit including said electric crank switch for said operating coil of said second relay.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |