US4238716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature vehicle dispenser spin-up speed control system
Assignee: United States Department of the Air Force
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Filing: 1978-09-27
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Granted: 1980-12-09
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Expires: 1998-09-27
Abstract
Abstract A precision motor speed control system where a reference generator produces pulses for each revolution of a dispenser shaft, the time between pulses is measured and compared to a preselected standard, a time greater than standard will generate a pulse causing a transistor circuit to apply an accelerating voltage to the motor, a time less than the standard will generate a pulse causing a transistor circuit to apply a decelerating voltage to the motor.
Inventors
- 👤 William G. Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:15
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02P7/291; H02P23/00; H02P23/20; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
A miniature vehicle dispenser spin-up control system, for use in combination with a gas reaction acceleration system, including an electric motor having a shaft, connected through a gear system, to a dispenser and further including means for generating an electronic pulse for each revolution of the motor shaft and means for measuring the time interval between pulses, comparing it with a standard time interval and producing a first output when the time interval is more than the standard and a second output when the time interval is less than the standard, the improvement comprising: a first transistor circuit connecting a line voltage with the motor and controlled by said first output whereby a signal will cause the motor shaft to accelerate; a resistor connected in parallel with the transistor, providing a current to allow the motor to overcome its' inherent friction and a diode connected in parallel with the first transistor and resistor for preventing induced voltages; a second transistor circuit connecting a line voltage, with the motor and controlled by the second output, a limiting resistor connected in series between the transistor and the motor whereby a back emf is created causing the motor shaft to decelerate, and a diode connected in parallel with the transistor reactor for preventing induced voltages.
Claim 2
Dependent Claim
212 words
A miniature vehicle dispenser spin-up control system, for use in combination with a gas reaction acceleration system, including an electric motor having a shaft, connected through a gear system, to a dispenser and further including means for generating an electronic pulse for each revolution of the motor shaft and means for measuring the time interval between pulses, comparing it with a standard time interval and producing a first output when the time interval is more than the standard and a second output when the time interval is less than the standard, the improvement comprising: a first transistor circuit connecting a line voltage with the motor and controlled by said first output whereby a signal will cause the motor shaft to accelerate; a resistor connected in parallel with the transistor, providing a current to allow the motor to overcome its' inherent friction and a diode connected in parallel with the first transistor and resistor for preventing induced voltages; a second transistor circuit connecting a line voltage, with the motor and controlled by the second output, a limiting resistor connected in series between the transistor and the motor whereby a back emf is created causing the motor shaft to decelerate, and a diode connected in parallel with the transistor reactor for preventing induced voltages.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |