Patent US3617849A successfully refreshed from Google Patents.
US3617849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control damping circuit
Assignee: Teledyne Inc
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Filing: 1970-08-14
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Granted: 1971-11-02
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Expires: 1990-08-14
Abstract
Abstract The circuit controlling the motor which actuates a control potentiometer or the like is made up of operational amplifiers and resistors connected so that, at stall, the feedback loop is not effective and the feedback loop is effective only when the motor is turning, which provides the desired rate feedback for servo damping.
Inventors
- 👤 Robert L Charlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:51
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
In a motor control circuit for proViding rate damping of said motor, a first operational amplifier and a second operational amplifier connected in series therewith, a series connected first resistor in the input of said first amplifier and a second resistor connected in parallel with said first amplifier, a third resistor connecting the output of said first amplifier with the input of said second amplifier, a fourth resistor connected in parallel with said second operational amplifier, the ratio of the resistance of said fourth resistor to the resistance of said third resistor being one, a fifth resistor connected with the output of said first amplifier and in series with the armature of said motor which is connected to the output of said second amplifier, and a sixth resistor electrically connecting the input of said first operational amplifier with the junction of said motor armature and said fifth resistor.
Claim 2
Dependent Claim
148 words
In a motor control circuit for proViding rate damping of said motor, a first operational amplifier and a second operational amplifier connected in series therewith, a series connected first resistor in the input of said first amplifier and a second resistor connected in parallel with said first amplifier, a third resistor connecting the output of said first amplifier with the input of said second amplifier, a fourth resistor connected in parallel with said second operational amplifier, the ratio of the resistance of said fourth resistor to the resistance of said third resistor being one, a fifth resistor connected with the output of said first amplifier and in series with the armature of said motor which is connected to the output of said second amplifier, and a sixth resistor electrically connecting the input of said first operational amplifier with the junction of said motor armature and said fifth resistor.
Claim 3
Dependent Claim
26 words
The motor control circuit as described in claim 1, the ratio of the resistance of said fifth resistor to the resistance of said armature being one.
Claim 4
Dependent Claim
22 words
The motor control circuit as described in claim 1, and including a variable resistance connecting said sixth resistor with said motor armature.
Claim 5
Dependent Claim
26 words
The motor control circuit as described in claim 1, and including a potentiometer connected in parallel with said motor armature and connected with said sixth resistor.
Claim 6
Dependent Claim
31 words
The motor control circuit as described in claim 1, the ratio of the resistance of said second resistor to the resistance of said first resistor being, optionally, from one to 1,000.
Claim 7
Dependent Claim
24 words
The motor control circuit as described in claim 3, the resistance of said fifth resistor being less than the resistance of said motor armature.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |