US3300701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control apparatus
Assignee: AT&T Inc
•
Filing: 1963-11-29
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Granted: 1967-01-24
•
Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Robert A Miller
- 👤 Charles M Taris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18; H02P3/20; G; G11; G11B; G11B15/00; G11B15/18; G11B15/22; G11B15/44; H02P3/02; H02P3/04; H02P3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
APPARATUS FOR STOPPING AN ELECTRIC MOTOR HAVING A SHAFT AND A POWER SOURCE COMPRISING, IN COMBINATION, A MOTOR STOP CONTROL DEVICE, CIRCUIT MEANS RESPONSIVE TO THE OPERATION OF SAID DEVICE FOR SHIFTING THE DIRECTION OF ROTATION OF SAID MOTOR FROM A FORWARD DIRECTION OF A REVERSE DIRECTION, SWITCH MEANS FOR OPENING SAID CIRCUIT MEANS THEREBY TO DISCONNECT SAID MOTOR FROM SAID SOURCE, AND DUAL FUNCTION CAM FOLLOWER MEANS UNIFORMLY RESPONSIVE TO A RELATIVELY SMALL FRACTION OFA REVOLUTION OF SAID SHAFT IN SAID REVERSE DIRECTION (A) FOR OPERATING SAID SWITCH MEANS AND (B) FOR ABRUPTLY BEARING AGAINST SAID SHAFT WITH PROGRESSIVELY INCREASING FORCE UNTIL SAID SHAFT IS BROUGHT TO REST.
Claim 2
Dependent Claim
109 words
APPARATUS FOR STOPPING AN ELECTRIC MOTOR HAVING A SHAFT AND A POWER SOURCE COMPRISING, IN COMBINATION, A MOTOR STOP CONTROL DEVICE, CIRCUIT MEANS RESPONSIVE TO THE OPERATION OF SAID DEVICE FOR SHIFTING THE DIRECTION OF ROTATION OF SAID MOTOR FROM A FORWARD DIRECTION OF A REVERSE DIRECTION, SWITCH MEANS FOR OPENING SAID CIRCUIT MEANS THEREBY TO DISCONNECT SAID MOTOR FROM SAID SOURCE, AND DUAL FUNCTION CAM FOLLOWER MEANS UNIFORMLY RESPONSIVE TO A RELATIVELY SMALL FRACTION OFA REVOLUTION OF SAID SHAFT IN SAID REVERSE DIRECTION (A) FOR OPERATING SAID SWITCH MEANS AND (B) FOR ABRUPTLY BEARING AGAINST SAID SHAFT WITH PROGRESSIVELY INCREASING FORCE UNTIL SAID SHAFT IS BROUGHT TO REST.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |