US3155277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling control system
Assignee: Cutler Hammer Inc
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Filing: 1961-09-13
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Granted: 1964-11-03
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Expires: 1981-09-13
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Fath
- 👤 Frank J Kleewein
- 👤 Kraschinsky Theodore
- 👤 Gene C Lutsch
- 👤 Corners Hales
- 👤 Carl J Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:42
CPC Classifications
G; G05; G05D; G05D5/00; G05D5/02; G05D5/03; C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; C22B1/205; G05D9/00; G05D9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A MOTOR CONTROL SYSTEM HAVING AN ELECTRICAL POWER SUPPLY SOURCE AND MEANS FOR ADJUSTING THE POWER SUPPLIED FROM THE SOURCE TO THE MOTOR TO CONTROL THE SPEED THEREOF: A FIRST CONTROL SIGNAL SOURCE COMPRISING MEANS PROVIDING A FIRST ELECTRICAL CONTROL SIGNAL WHICH VARIES IN PROPORTION TO A FIRST VARIABLE EXTERNAL CONDITION HAVING A FIRST VARYING CHARACTERISTIC; A SECOND CONTROL SIGNAL SOURCE COMPRISING MEANS PROVIDING A SECOND ELECTRICAL CONTROL SIGNAL WHICH VARIES IN PROPORTION TO A SECOND VARIABLE EXTERNAL CONDITION HAVING A DIFFERENT VARYING CHARACTERISTIC; CONTROL MEANS RESPONSIVE TO SAID FIRST AND SECOND CONTROL SIGNALS FOR CONTROLLING SAID POWER ADJUSTING MEANS TO ADJUST THE SPEED OF THE MOTOR; AND UNITARY SELECTING MEANS OPERABLE TO SELECT A DESIRED RATIO OF SAID FIRST AND SECOND CONTROL SIGNALS FOR APPLICATION TO SAID CONTROL MEANS AND BEING EFFECTIVE WHEN OPERATED TO INCREASE ONE OF SAID CONTROL SIGNALS AND SIMULTANEOUSLY AND PROPORTIONATELY TO DECREASE THE OTHER OF SAID CONTROL SIGNALS.
Claim 2
Dependent Claim
155 words
IN A MOTOR CONTROL SYSTEM HAVING AN ELECTRICAL POWER SUPPLY SOURCE AND MEANS FOR ADJUSTING THE POWER SUPPLIED FROM THE SOURCE TO THE MOTOR TO CONTROL THE SPEED THEREOF: A FIRST CONTROL SIGNAL SOURCE COMPRISING MEANS PROVIDING A FIRST ELECTRICAL CONTROL SIGNAL WHICH VARIES IN PROPORTION TO A FIRST VARIABLE EXTERNAL CONDITION HAVING A FIRST VARYING CHARACTERISTIC; A SECOND CONTROL SIGNAL SOURCE COMPRISING MEANS PROVIDING A SECOND ELECTRICAL CONTROL SIGNAL WHICH VARIES IN PROPORTION TO A SECOND VARIABLE EXTERNAL CONDITION HAVING A DIFFERENT VARYING CHARACTERISTIC; CONTROL MEANS RESPONSIVE TO SAID FIRST AND SECOND CONTROL SIGNALS FOR CONTROLLING SAID POWER ADJUSTING MEANS TO ADJUST THE SPEED OF THE MOTOR; AND UNITARY SELECTING MEANS OPERABLE TO SELECT A DESIRED RATIO OF SAID FIRST AND SECOND CONTROL SIGNALS FOR APPLICATION TO SAID CONTROL MEANS AND BEING EFFECTIVE WHEN OPERATED TO INCREASE ONE OF SAID CONTROL SIGNALS AND SIMULTANEOUSLY AND PROPORTIONATELY TO DECREASE THE OTHER OF SAID CONTROL SIGNALS.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |