Patent US3753066A successfully refreshed from Google Patents.
US3753066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital two-speed motor control
Assignee: United States Department of the Navy
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Filing: 1972-05-08
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Granted: 1973-08-14
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Expires: 1992-05-08
Abstract
Abstract A remote digital two-speed motor control, for controlling frequency or bandwidth tuning of a jamming transmitter. A digitally controlled transistor switches the speed of a motor after a predetermined time delay. The motor may be retained in the initial speed by continuous resetting of the digital circuit before the timing circuit reaches a firing voltage.
Inventors
- 👤 H Sailer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:06
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/288
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
196 words
A digital two-speed motor control comprising: a motor; a power source connected to said motor; resistive means connected between said power source and said motor for opeRating the motor at a predetermined slow speed; a transistor control connected in parallel with said resistive means for changing the motor to fast speed; means for switching said transistor control on; said switching means comprising a flip-flop adapted to switch said transistor control on when it produces a high output; a power gate for amplifying the output of the flip-flop and applying it to the transistor control; means for changing the output of the flip-flop to a low state and back to a high state after a predetermined time; said means comprising a switch for changing the input of the flip-flop to a high state; timing means for producing a pulse after a predetermined time constant expires; pulse inverting means connected to said timing means for applying said pulse to said flip-flop; and inhibiting means for preventing the timing means from reaching firing voltage; said inhibiting means connected to the flip-flop through the power gate and adapted to be energized by said flip-flop when it receives a high input.
Claim 2
Dependent Claim
196 words
A digital two-speed motor control comprising: a motor; a power source connected to said motor; resistive means connected between said power source and said motor for opeRating the motor at a predetermined slow speed; a transistor control connected in parallel with said resistive means for changing the motor to fast speed; means for switching said transistor control on; said switching means comprising a flip-flop adapted to switch said transistor control on when it produces a high output; a power gate for amplifying the output of the flip-flop and applying it to the transistor control; means for changing the output of the flip-flop to a low state and back to a high state after a predetermined time; said means comprising a switch for changing the input of the flip-flop to a high state; timing means for producing a pulse after a predetermined time constant expires; pulse inverting means connected to said timing means for applying said pulse to said flip-flop; and inhibiting means for preventing the timing means from reaching firing voltage; said inhibiting means connected to the flip-flop through the power gate and adapted to be energized by said flip-flop when it receives a high input.
Claim 3
Dependent Claim
30 words
The control system of claim 1 wherein said transistor is a PNP transistor whereby said motor is initially in slow speed and switches to high speed after a predetermined time.
Claim 4
Dependent Claim
30 words
The control system of claim 1 wherein said transistor is an NPN transistor whereby said motor is initially in fast speed and switches to slow speed after a predetermined time.
Claim 5
Dependent Claim
16 words
The control system of claim 1 wherein said timing means has an adjustable resistive-capacitive time constant.
Claim 6
Dependent Claim
26 words
The control system of claim 4 wherein said inhibiting means is a silicon controlled rectifier with its gate connected to the flip-flop through the power gate.
Claim 7
Dependent Claim
13 words
The control system of claim 5 including means for tuning a jamming transmitter.
Claim 8
Dependent Claim
19 words
The control system of claim 6 wherein said tuning means comprises a series of clutches connected to said motor.
Claim 9
Dependent Claim
14 words
The control system of claim 7 including means for selecting frequency or bandwidth tuning.
Claim 10
Dependent Claim
17 words
The control system of claim 8 including means for operating said motor in forward or reverse direction.
Claim 11
Dependent Claim
42 words
The control system of claim 9 wherein said means for selecting frequency or bandwidth tuning and operating said motor in the forward or reverse direction comprises a plurality of NAND gates; power gates and relays connected to the input of said flip-flop.
References Cited (Backward Citations)
US3546530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |