Patent US3305714A successfully refreshed from Google Patents.
US3305714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-braking devices
Assignee: Brunswick Corp
•
Filing: 1964-01-08
•
Granted: 1967-02-21
•
Expires: 1984-01-08
Abstract
No abstract record available.
Inventors
- 👤 Jr William Henry Plumpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:53
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18; H02P3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A BRAKING DEVICE FOR USE WITH AN ALTERNATING-CURRENT MOTOR HAVING A FIELD WINDING, SAID DEVICE COMPRISING A SOURCE OF ALTERNATING CURRENT TO SUPPLY POWER TO THE MOTOR, MEANS FOR INTERRUPTING THE FLOW OF ALTERNATING CURRENT TO THE MOTOR, A SOURCE OF DIRECT CURRENT INCLUDING A CAPACITOR CONNECTED IN PARALLEL ACROSS THE FIELD WINDING OF THE MOTOR, RECTIFIER MEANS IN SERIES WITH THE CAPACITOR FOR CHARGING SAID CAPACITOR FROM THE SOURCE OF ALTERNATING CURRENT, A TWO TERMINAL SWITCHING DIODE OF THE AVALANCHE TYPE INTERPOSED BETWEEN THE CAPACITOR AND THE FIELD WINDING FOR NORMALLY BLOCKING THE FLOW OF DIRECT CURRENT TO THE FIELD WINDING, MEANS OPERABLE RESPONSIVE TO INTERRUPTION OF THE FLOW OF ALTERNATING CURRENT TO SAID MOTOR FOR CAUSING THE SWITCHING DIODE TO BECOME CONDUCTIVE THEREBY TRANSMITTING A DIRECT-CURRENT IMPULSE FROM THE CAPACITOR TO THE MOTOR THEREBY CAUSING THE MOTOR TO STOP.
Claim 2
Dependent Claim
141 words
A BRAKING DEVICE FOR USE WITH AN ALTERNATING-CURRENT MOTOR HAVING A FIELD WINDING, SAID DEVICE COMPRISING A SOURCE OF ALTERNATING CURRENT TO SUPPLY POWER TO THE MOTOR, MEANS FOR INTERRUPTING THE FLOW OF ALTERNATING CURRENT TO THE MOTOR, A SOURCE OF DIRECT CURRENT INCLUDING A CAPACITOR CONNECTED IN PARALLEL ACROSS THE FIELD WINDING OF THE MOTOR, RECTIFIER MEANS IN SERIES WITH THE CAPACITOR FOR CHARGING SAID CAPACITOR FROM THE SOURCE OF ALTERNATING CURRENT, A TWO TERMINAL SWITCHING DIODE OF THE AVALANCHE TYPE INTERPOSED BETWEEN THE CAPACITOR AND THE FIELD WINDING FOR NORMALLY BLOCKING THE FLOW OF DIRECT CURRENT TO THE FIELD WINDING, MEANS OPERABLE RESPONSIVE TO INTERRUPTION OF THE FLOW OF ALTERNATING CURRENT TO SAID MOTOR FOR CAUSING THE SWITCHING DIODE TO BECOME CONDUCTIVE THEREBY TRANSMITTING A DIRECT-CURRENT IMPULSE FROM THE CAPACITOR TO THE MOTOR THEREBY CAUSING THE MOTOR TO STOP.
References Cited (Backward Citations)
US2428390A
Cited
US2512354A
Cited
US2519043A
Cited
US2767362A
Cited
US2812484A
Cited
US2818539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |