Patent US3757166A successfully refreshed from Google Patents.
US3757166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for controlling acceleration of a wheel
Assignee: Girling Ltd
•
Filing: 1971-03-03
•
Granted: 1973-09-04
•
Expires: 1991-03-03
Abstract
Abstract The acceleration of a wheel on a rail vehicle is controlled by using the wheel to drive a generator which produces an electrical signal, the magnitude of which depends on the acceleration of the wheel. This signal is applied to a d.c. control circuit which includes means operable to prevent transmission of driving power to the wheel. The control circuit includes a d.c. source charged by the generator and providing power to the control circuit, and the arrangement also includes a delay network for maintaining the circuit in a condition to prevent transmission of power in the event that the wheels should lock before the power is released.
Inventors
- 👤 S Clifford
- 👤 L Hiscox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:00
CPC Classifications
B; B60; B60L; B60L3/00; B60L3/10; B60L3/106; B60L3/108; B60T; B60T8/00; B60T8/17; B60T8/1701; B60T8/1705; B60T8/176; B60T8/1761; B60T8/17613; B60T8/32; B60T8/88; B60T8/885; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
Means for controlling the acceleration of a wheel, comprising a generator driven by the wheel, means for producing an electrical signal having a magnitude dependent on the acceleration of the wheel, a d.c. control circuit to which said signal is supplied, said control circuit including means operable in use to prevent transmission of driving power to said wheel when the magnitude of said signal reaches a predetermined value, a d.c. source which is charged by said generator and provides the sole power to said control circuit, a voltage regulator controlling the charging of said d.c. source by said generator, and a delay network within said control circuit for maintaining the circuit in a condition to prevent supply of power to said wheel in the event that the wheel should start to slip before said power is released.
Claim 2
Dependent Claim
137 words
Means for controlling the acceleration of a wheel, comprising a generator driven by the wheel, means for producing an electrical signal having a magnitude dependent on the acceleration of the wheel, a d.c. control circuit to which said signal is supplied, said control circuit including means operable in use to prevent transmission of driving power to said wheel when the magnitude of said signal reaches a predetermined value, a d.c. source which is charged by said generator and provides the sole power to said control circuit, a voltage regulator controlling the charging of said d.c. source by said generator, and a delay network within said control circuit for maintaining the circuit in a condition to prevent supply of power to said wheel in the event that the wheel should start to slip before said power is released.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |