Patent US3652901A successfully refreshed from Google Patents.
US3652901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing simultaneous energization of electromagnetic coils in an automatic speed change control system for automobiles
Assignee: Denso Corp
•
Filing: 1970-03-16
•
Granted: 1972-03-28
•
Expires: 1990-03-16
Abstract
Abstract A device for preventing the simultaneous energization of electromagnetic coils used for driving the speed change gears in the automatic speed control system for an automobile, which device comprises resistors having one end thereof connected with the positive terminal of electromagnetic coils of electromagnetic valves, the other ends of the resistors being connected in common with the magnetic pole of a constant-voltage diode, and a power control circuit provided between a battery and a load, the positive pole of the constant-voltage diode being connected with the control signal input terminal of the power control circuit, whereby when two or more of the electromagnetic coils are about to be energized simultaneously, a current is passed through the constant-voltage diode to the control signal input terminal of the power control circuit to thereby cut off a current in the power control circuit and therefore the current to electromagnetic coils. The device is simple in circuit arrangement and free of the malfunction resulting from the qualitative irregularity of electrical components in use, or from variations in the ambient temperature or the source voltage.
Inventors
- 👤 Hisato Wakamatsu
- 👤 Akira Kitano
- 👤 Hisasi Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:28
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W30/19; B60W30/1819; B60W2710/00; B60W2710/10; B60W2710/1005; F; F16; F16H; F16H61/00; F16H61/12; F16H2061/1204; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19437
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
A device for preventing the simultaneous energization of a plurality of electromagnetic valves in an automatic speed change control system of an automobile, wherein electromagnetic coils of the electromagnetic valves are each respectively connectable to a power source through a power control circuit means, each of the electromagnetic coils being operable when energized to actuate a respectively corresponding electromagnetic valve in the automatic speed change control system, said device comprising: a plurality of resistors, each being connected at one end to a first terminal of a respectively corresponding one of said electromagnetic coils, and a constant-voltage diode having one pole thereof connected to a control terminal of the power control circuit means and having the other pole thereof connected in common to all the other ends of said plurality of resistors whereby the voltages supplied to said electromagnetic coils are effectively summed to cause conduction of said diode whenever more than one electromagnetic coil is energized whereby the power control circuit means control terminal is energized to thereafter cause cessation of power supply to the electromagnetic coils whenever more than one is simultaneously energized.
Claim 2
Independent Claim
184 words
A device for preventing the simultaneous energization of a plurality of electromagnetic valves in an automatic speed change control system of an automobile, wherein electromagnetic coils of the electromagnetic valves are each respectively connectable to a power source through a power control circuit means, each of the electromagnetic coils being operable when energized to actuate a respectively corresponding electromagnetic valve in the automatic speed change control system, said device comprising: a plurality of resistors, each being connected at one end to a first terminal of a respectively corresponding one of said electromagnetic coils, and a constant-voltage diode having one pole thereof connected to a control terminal of the power control circuit means and having the other pole thereof connected in common to all the other ends of said plurality of resistors whereby the voltages supplied to said electromagnetic coils are effectively summed to cause conduction of said diode whenever more than one electromagnetic coil is energized whereby the power control circuit means control terminal is energized to thereafter cause cessation of power supply to the electromagnetic coils whenever more than one is simultaneously energized.
Claim 3
Dependent Claim
28 words
A device as in claim 1 wherein the said one pole of said constant-voltage diode comprises a positive pole and said other pole coMprises a negative pole thereof.
Claim 4
Dependent Claim
51 words
A device as in claim 2 wherein said electromagnetic coils are normally energized with a positive polarity voltage on said first terminals thereof whereby said constant-voltage diode is forced into reverse conduction whenever more than one of said first terminals is supplied with a positive DC voltage of the normal magnitude.
Claim 5
Dependent Claim
167 words
In an automatic speed change control system of an automobile comprising a power source and a plurality of electromagnetic valves with respectively corresponding electromagnetic coils individually connectable thereto through a power control circuit capable of preventing coil energization when triggered by a control signal input at a control terminal thereof, a device for preventing the simultaneous energization of more than one of the electromagnetic coils, said device comprising: a plurality of resistors, each resistor being connected at one end thereof to an energizable terminal of a respectively corresponding one of said electromagnetic coils, and a constant-voltage diode having one pole thereof connected to said control terminal of the power control circuit and having the other pole thereof connected in common to all the other ends of said plurality of resistors whereby the voltages individually supplied to said electromagnetic coils are effectively summed to cause conduction of said diode and hence triggering of said power control circuit whenever more than one of said electromagnetic coils in energized simultaneously.
Claim 6
Dependent Claim
167 words
In an automatic speed change control system of an automobile comprising a power source and a plurality of electromagnetic valves with respectively corresponding electromagnetic coils individually connectable thereto through a power control circuit capable of preventing coil energization when triggered by a control signal input at a control terminal thereof, a device for preventing the simultaneous energization of more than one of the electromagnetic coils, said device comprising: a plurality of resistors, each resistor being connected at one end thereof to an energizable terminal of a respectively corresponding one of said electromagnetic coils, and a constant-voltage diode having one pole thereof connected to said control terminal of the power control circuit and having the other pole thereof connected in common to all the other ends of said plurality of resistors whereby the voltages individually supplied to said electromagnetic coils are effectively summed to cause conduction of said diode and hence triggering of said power control circuit whenever more than one of said electromagnetic coils in energized simultaneously.
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |