US3344327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-speed motor control circuit with brake
Assignee: Devlieg Bullard Inc
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Filing: 1965-01-07
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Granted: 1967-09-26
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Expires: 1985-01-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas K Hutchinson
- 👤 Hutchinson Oliver C Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:21
CPC Classifications
B; B22; B22C; B22C19/00; B22C19/04; H; H02; H02P; H02P25/00; H02P25/16; H02P25/18; H02P25/20; H02P3/00; H02P3/02; H02P3/04; H02P3/06; H02P7/00; H02P7/06; H02P7/18; H02P7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A MOTOR CONTROL CIRCUIT FOR DRIVING A LOAD ALONG A PATH FROM AN INITIAL POSITION TOWARD A SECOND POSITION AND IS BROUGHT TO REST IN SAID SECOND POSITION, A TWO-SPEED MOTOR THAT HAS A HIGH SPEED WINDING AND A LOW SPEED WINDING AND CONNECTED TO MOVE SAID LOAD, A BRAKE CONNECTED TO SAID MOTOR, SAID BRAKE APPLYING BRAKING FORCES TO AND HALTING MOVEMENT OF SAID MOTOR AND LOAD WHENEVER SAID HIGH SPEED WINDING AND SAID LOW SPEED WINDING ARE DEENERGIZED, SAID BRAKE FREEING SAID MOTOR AND LOAD FOR ROTATION WHENEVER EITHER SAID HIGH SPEED WINDING OR SAID LOW SPEED WINDING IS ENERGIZED, FIRST LIMIT SWITCH MEANS ADJACENT SAID INITIAL POSITION OF SAID LOAD, FURTHER LIMIT SWITCH MEANS ADJACENT SAID SECOND POSITION OF SAID LOAD,
Claim 2
Dependent Claim
125 words
IN A MOTOR CONTROL CIRCUIT FOR DRIVING A LOAD ALONG A PATH FROM AN INITIAL POSITION TOWARD A SECOND POSITION AND IS BROUGHT TO REST IN SAID SECOND POSITION, A TWO-SPEED MOTOR THAT HAS A HIGH SPEED WINDING AND A LOW SPEED WINDING AND CONNECTED TO MOVE SAID LOAD, A BRAKE CONNECTED TO SAID MOTOR, SAID BRAKE APPLYING BRAKING FORCES TO AND HALTING MOVEMENT OF SAID MOTOR AND LOAD WHENEVER SAID HIGH SPEED WINDING AND SAID LOW SPEED WINDING ARE DEENERGIZED, SAID BRAKE FREEING SAID MOTOR AND LOAD FOR ROTATION WHENEVER EITHER SAID HIGH SPEED WINDING OR SAID LOW SPEED WINDING IS ENERGIZED, FIRST LIMIT SWITCH MEANS ADJACENT SAID INITIAL POSITION OF SAID LOAD, FURTHER LIMIT SWITCH MEANS ADJACENT SAID SECOND POSITION OF SAID LOAD,
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |