US3673483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way drive for optical systems and the like
Assignee: Jos Schneider Optische Werke GmbH
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Filing: 1970-10-12
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Granted: 1972-06-27
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Expires: 1990-10-12
Abstract
Abstract A load, such as a servomotor for the positioning (e.g. tilting) of a television camera, is operable by a control circuit provided with an input (E1) for a position signal and another input (E3) for a speed signal. The positioning signal is applied, together with a feedback signal (E2) from a position sensor, to a comparator whose positive or negative output generates an error signal of corresponding polarity and of a magnitude determined by the speed signal. A reversible load motor, coupled with the position sensor, also drives a generator to produce a reference signal of either polarity, the difference between the error signal and the reference signal producing a drive voltage of one or the other polarity for the load motor until the system is in balance.
Inventors
- 👤 Karl Gunter Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:05
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445; G05D3/1427
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
184 words
A control system for the positioning of a reversible load, comprising: a reversible drive motor for said load provided with an input circuit; a tachometer coupled with said motor for producing a reference signal of a polarity and magnitude determined by the direction and speed of motor rotation; position-sensing means coupled with said motor for generating a feedback signal indicative of load position; a source of adjustable control voltage; comparison means connected to receive said feedback signal together with a positioning signal and for deriving a bipolar error sigNal from the difference thereof; a limiter stage connected in the output of said comparison means for making the magnitude of said error signal independent of the value of said difference, said limiter stage having an input connected to said source for selectively varying the magnitude of said error signal; and differential circuitry in said input circuit connected to receive said reference signal from said tachometer and a modified error signal from said limiter stage for deriving therefrom a driving voltage of either polarity to actuate said motor in a sense tending to reduce said difference.
Claim 2
Dependent Claim
184 words
A control system for the positioning of a reversible load, comprising: a reversible drive motor for said load provided with an input circuit; a tachometer coupled with said motor for producing a reference signal of a polarity and magnitude determined by the direction and speed of motor rotation; position-sensing means coupled with said motor for generating a feedback signal indicative of load position; a source of adjustable control voltage; comparison means connected to receive said feedback signal together with a positioning signal and for deriving a bipolar error sigNal from the difference thereof; a limiter stage connected in the output of said comparison means for making the magnitude of said error signal independent of the value of said difference, said limiter stage having an input connected to said source for selectively varying the magnitude of said error signal; and differential circuitry in said input circuit connected to receive said reference signal from said tachometer and a modified error signal from said limiter stage for deriving therefrom a driving voltage of either polarity to actuate said motor in a sense tending to reduce said difference.
Claim 3
Dependent Claim
23 words
A system as defined in claim 1 wherein the coupling between said motor, said tachometer and said position-sensing means includes a mechanical transmission.
Claim 4
Dependent Claim
20 words
A system as defined in claim 2, further comprising a common housing for said comparison means, differential circuitry and transmission.
Claim 5
Dependent Claim
14 words
A system as defined in claim 1 wherein said limiter stage comprises an amplifier.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |