US3414786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping motor servo
Assignee: International Business Machines Corp
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Filing: 1965-10-22
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Granted: 1968-12-03
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Kasmer
- 👤 William C Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:53
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/27; G05B19/29; G05B19/291; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41326; G05B2219/43; G05B2219/43006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
A COMPUTER-CONTROLLED STEPPING MOTOR SERVO COMPRISING A STEPPING MOTOR INCLUDING A FIXED MEMBER AND A ROTATABLE MEMBER MOVEABLE BY INCREMENTAL STEPS UPON THE APPLICATION OF COMMANDS TO THE MOTOR, ONE STEP PER COMMAND, SAID MOTOR BEING MOVABLE BETWEEN INITIAL AND DESIRED STEP POSITIONS, ENCODER MEANS HAVING A RUNNING TRACK OF EQUALLY SPACED INDICIA CORRESPONDING IN NUMBER TO THE NUMBER OF STEPS OF SAID MOTOR AND OTHER INDICIA GIVING A UNIQUE REPRESENTATION OF THE ACTUAL ANGULAR POSITION OF THE ROTATABLE MEMBER FOR EACH OF ITS STEPS, MEANS FOR DETECTING SAID INDICIA AS SAID ROTATABLE MEMBER MOVES, AND FOR GENERATING A COMMAND CORRESPONDING TO EACH OF THE RUNNING TRACK INDICIA WHICH ARE DETECTED, MEANS FOR PROVIDING A START COMMAND TO THE MOTOR, MEANS FOR SUPPLYING A REPRESENTATION OF THE DESIRED STEP POSITION TO WHICH THE MOTOR IS TO BE MOVED, AND MEANS FOR COMPUTING THE DIFFERENCE IN STEPS BETWEEN THE INITIAL AND DESIRED STEP POSITIONS AND FOR DRIVING THE MOTOR A NUMBER OF STEPS EQUAL TO THIS COMPUTED DIFFERENCE LESS ONE STEP WHICH IS SKIPPED TO ACCOUNT FOR THE EXTRA STEP INTRODUCED BY THE START COMMAND, THE COMMAND CORRESPONDING TO SAID SKIPPED STEP BEING SKIPPED AT A PREDETERMINED DISTANCE IN STEPS BEFORE THE DESIRED STEP POSITION TO CAUSE THE MOTOR TO DECELERATE.
Claim 2
Dependent Claim
210 words
A COMPUTER-CONTROLLED STEPPING MOTOR SERVO COMPRISING A STEPPING MOTOR INCLUDING A FIXED MEMBER AND A ROTATABLE MEMBER MOVEABLE BY INCREMENTAL STEPS UPON THE APPLICATION OF COMMANDS TO THE MOTOR, ONE STEP PER COMMAND, SAID MOTOR BEING MOVABLE BETWEEN INITIAL AND DESIRED STEP POSITIONS, ENCODER MEANS HAVING A RUNNING TRACK OF EQUALLY SPACED INDICIA CORRESPONDING IN NUMBER TO THE NUMBER OF STEPS OF SAID MOTOR AND OTHER INDICIA GIVING A UNIQUE REPRESENTATION OF THE ACTUAL ANGULAR POSITION OF THE ROTATABLE MEMBER FOR EACH OF ITS STEPS, MEANS FOR DETECTING SAID INDICIA AS SAID ROTATABLE MEMBER MOVES, AND FOR GENERATING A COMMAND CORRESPONDING TO EACH OF THE RUNNING TRACK INDICIA WHICH ARE DETECTED, MEANS FOR PROVIDING A START COMMAND TO THE MOTOR, MEANS FOR SUPPLYING A REPRESENTATION OF THE DESIRED STEP POSITION TO WHICH THE MOTOR IS TO BE MOVED, AND MEANS FOR COMPUTING THE DIFFERENCE IN STEPS BETWEEN THE INITIAL AND DESIRED STEP POSITIONS AND FOR DRIVING THE MOTOR A NUMBER OF STEPS EQUAL TO THIS COMPUTED DIFFERENCE LESS ONE STEP WHICH IS SKIPPED TO ACCOUNT FOR THE EXTRA STEP INTRODUCED BY THE START COMMAND, THE COMMAND CORRESPONDING TO SAID SKIPPED STEP BEING SKIPPED AT A PREDETERMINED DISTANCE IN STEPS BEFORE THE DESIRED STEP POSITION TO CAUSE THE MOTOR TO DECELERATE.
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |