Patent DE283397C successfully refreshed from Google Patents.
US3277288A
Expired / Lapsed
US
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Automatic control mechanism for machine tools
Assignee: EMI Ltd
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Filing: 1962-02-19
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Granted: 1966-10-04
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Expires: 1982-02-19
Abstract
No abstract record available.
Inventors
- 👤 Hartley Frederick Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/41; G05B19/4105; B; B23; B23Q; B23Q15/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
AUTOMATIC CONTROL MECHANISM FOR MACHINE TOOLS COMPRISING MEANS FOR DERIVING COMMAND SIGNALS REPRESENTING VALUES OF A CO-ORDINATE AT SUCCESSIVE POINTS WHICH DETERMINE THE PATH OF A CUTTER RELATIVE TO A WORKPIECE, A SERVO-MOTOR, RESOLVING MEANS COUPLED TO SAID SERVOMOTOR FOR COMBINING SAID COMMAND SIGNALS TO PRODUCE AN ERROR SIGNAL FOR SAID SERVO-MOTOR, WHEREBY SAID SERVOMOTOR SETS UP AN INDICATION OF THE DIRECTION OF SAID PATH, MEANS FOR DERIVING A MONITORING SIGNAL REPRESENTING THE DIFFERENCE BETWEEN SAID INDICATION AND A SIGNAL DEPENDENT ON THE DIRECTION OF SAID PATH AT A POINT SPACED FROM THAT CORRESPONDING TO SAID INDICATION, AND MEANS FOR PRODUCING AN ACTION SIGNAL WHEN SAID MONITORING SIGNAL EXCEEDS A PREDETERMINED LIMIT.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |