US3572175A
Expired / Lapsed
US
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Indexing mechanism
Assignee: Gleason Works
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Filing: 1969-03-03
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Granted: 1971-03-23
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Expires: 1989-03-03
Abstract
Abstract AN ELECTRO-OPTICAL SYSTEM IS USED FOR PRECISELY CONTROLLING THE POSITION OF A ROTARY MEMBER DURING INTERMITTENT INDEXING MOVEMENTS THEREOF. A LINEAR GRATING OR SCALE IS ARRANGED ON THE PERIPHERY OF A ROTARY MEMBER AND AN ELECTRICAL CONTROLLER IS OPERATIVELY CONNECTED TO A CORRECTION INDEX MOTOR FOR TURNING THE ROTARY MEMBER IN ACCORDANCE WITH READINGS TAKEN OF THE LINEAR GRATING TO EFFECT CORRECTIVE INDEXING OF THE ROTARY MEMBER AFTER IT HAS BEEN INITIALLY PARTIALLY INDEXED BY A SEPARATE MECHANICAL INDEX DRIVE. THERE IS ALSO PROVIDED AN ANTIBACKLASH FEATURE, AND AN INDEX LOCK-UP DEVICE ACTING DIRECTLY ON THE DRIVE WORM.
Inventors
- 👤 Thomas A Deprez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:28
CPC Classifications
B; B23; B23F; B23F23/00; B23F23/08; Y; Y10; Y10T; Y10T74/00; Y10T74/14; Y10T74/1418; Y10T74/1424; Y10T74/1447; Y10T74/1453; Y10T74/1471
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |