US3384797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positioning apparatus with controls employing resistor increments
Assignee: Chemcut Corp
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Filing: 1964-12-24
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Granted: 1968-05-21
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Expires: 1984-12-24
Abstract
No abstract record available.
Inventors
- 👤 Robert C Benton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:46
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/33; G05B19/35; G05B19/351; G05B19/39; G05B2219/00; G05B2219/30; G05B2219/37; G05B2219/37007; G05B2219/37262; G05B2219/37463; G05B2219/42; G05B2219/42199; G05B2219/50; G05B2219/50044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A CONTROL SYSTEM FOR OPERATING A MACHINE ELEMENT TO BE CONTROLLED POSITIONALLY IN ACCORDANCE WITH A NUMERICAL CODE, COMPRISING: POWER MEANS FOR MOVING SAID ELEMENT; FOLLOWER MEANS TO OPERATED SAID POWER MEANS AND HAVING CONTROL MEANS, SAID CONTROL MEANS INCLUDING A MACHINE-ELEMENT POSITION-RESPONSIVE POTENTIOMETER AND A REFERENCE CONTACTOR ELEMENT THEREFOR CONNECTED TO SAID FOLLOWER MEANS; CURRENT SOURCE MEANS IN CIRCUIT WITH THE POTENTIOMETER FOR FLOWING CURRENT FROM END TO END THEREOF TO ESTABLISH A VOLTAGE GRADIENT WHICH INCLUDES ZERO VOLTAGE; AND AN IMPEDANCE CREATING CIRCUIT CONNETING ONE END OF THE POTENTIOMETER THROUGH IMPEDANCE TO A ZERO POTENTIAL GROUND, THE VOLTAGE LEVEL OF THE POTENTIOMETER SHIFTING IN DEPENDENCE UPON THE MAGNITUDE OF IMPEDANCE PRESENT IN SAID CIRCUIT AND ESTABLISHING THE ZERO VOLTAGE AT A DESIRED POINT ALONG THE POTENTIOMETER AT WHICH THE POTENTIOMETER IS TO BE IN CONTACT WITH THE REFERENCE CONTACTOR ELEMENT.
Claim 2
Dependent Claim
142 words
A CONTROL SYSTEM FOR OPERATING A MACHINE ELEMENT TO BE CONTROLLED POSITIONALLY IN ACCORDANCE WITH A NUMERICAL CODE, COMPRISING: POWER MEANS FOR MOVING SAID ELEMENT; FOLLOWER MEANS TO OPERATED SAID POWER MEANS AND HAVING CONTROL MEANS, SAID CONTROL MEANS INCLUDING A MACHINE-ELEMENT POSITION-RESPONSIVE POTENTIOMETER AND A REFERENCE CONTACTOR ELEMENT THEREFOR CONNECTED TO SAID FOLLOWER MEANS; CURRENT SOURCE MEANS IN CIRCUIT WITH THE POTENTIOMETER FOR FLOWING CURRENT FROM END TO END THEREOF TO ESTABLISH A VOLTAGE GRADIENT WHICH INCLUDES ZERO VOLTAGE; AND AN IMPEDANCE CREATING CIRCUIT CONNETING ONE END OF THE POTENTIOMETER THROUGH IMPEDANCE TO A ZERO POTENTIAL GROUND, THE VOLTAGE LEVEL OF THE POTENTIOMETER SHIFTING IN DEPENDENCE UPON THE MAGNITUDE OF IMPEDANCE PRESENT IN SAID CIRCUIT AND ESTABLISHING THE ZERO VOLTAGE AT A DESIRED POINT ALONG THE POTENTIOMETER AT WHICH THE POTENTIOMETER IS TO BE IN CONTACT WITH THE REFERENCE CONTACTOR ELEMENT.
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |