Patent US3909072A successfully refreshed from Google Patents.
US3909072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection circuitry for monitoring a vehicle wheel anti-skid and/or anti-spin control apparatus
Assignee: Westinghouse Bremsen und Apparatebau GmbH
•
Filing: 1973-09-04
•
Granted: 1975-09-30
•
Expires: 1993-09-04
Abstract
Abstract A protection control device for monitoring the controlling members of a wheel anti-skid and/or anti-spin system of a railway vehicle, for example, in which the normal digital output state of a flip-flop is switched when the output level of an integrator connected to drive the flip-flop reaches a predetermined value, thereby interrupting the voltage supply to the controlling members to render them inoperative. The integrator input is connected to circuitry arranged to feed a signal to the integrator in response to the occurrence of certain malfunctions associated with the controlling members.
Inventors
- 👤 Georg Geier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:58
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/88; B60T8/885; B60L; B60L3/00; B60L3/10; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
332 words
A wheel anti-skid and/or anti-spin control system for a vehicle comprising: a. at least one electro-magnetic control valve device for modulating the braking or driving force on said wheel; b. positive and negative feed lines via which electric power is provided; c. power supply switch means to which said electric power is connected; d. bistable flip-flop means for controlling operation of said power supply switch, said flip-flop means having a normal output condition in which said power supply switch is operated to conduct electrical power to said control valve device; e. electrical switching means interposed between said control valve device and said power supply switch for controlling the supply of power to said control valve device in accordance with a wheel skid and/or wheel spin signal being provided; and f. integrator means connected to the output of said switching means for providing a control signal to switch said flip-flop means from said normal output condition to another output condition in which said power supply switch is operated to interrupt the supply of power to said control valve device when the frequency of operation of said control valve device exceeds a predetermined measure. g. a control resistor connected between said power supply switch and said positive feed line; h. a first voltage divider across said feed lines consisting of a first resistor connected to said positive feed line and a second resistor connected to said negative feed line; i. a current limiting switch in parallel with said power supply switch and having an output connected to the control input of said power supply switch and a control input connected between said pair of resistors so as to be activated in response to the voltage drop across said control Resistor becoming greater than the voltage drop across said first resistor; and j. cut-off switch means for providing a second control signal to switch said flip-flop means from said normal output condition to said another output condition responsive to activation of said current limiting switch.
Claim 2
Dependent Claim
332 words
A wheel anti-skid and/or anti-spin control system for a vehicle comprising: a. at least one electro-magnetic control valve device for modulating the braking or driving force on said wheel; b. positive and negative feed lines via which electric power is provided; c. power supply switch means to which said electric power is connected; d. bistable flip-flop means for controlling operation of said power supply switch, said flip-flop means having a normal output condition in which said power supply switch is operated to conduct electrical power to said control valve device; e. electrical switching means interposed between said control valve device and said power supply switch for controlling the supply of power to said control valve device in accordance with a wheel skid and/or wheel spin signal being provided; and f. integrator means connected to the output of said switching means for providing a control signal to switch said flip-flop means from said normal output condition to another output condition in which said power supply switch is operated to interrupt the supply of power to said control valve device when the frequency of operation of said control valve device exceeds a predetermined measure. g. a control resistor connected between said power supply switch and said positive feed line; h. a first voltage divider across said feed lines consisting of a first resistor connected to said positive feed line and a second resistor connected to said negative feed line; i. a current limiting switch in parallel with said power supply switch and having an output connected to the control input of said power supply switch and a control input connected between said pair of resistors so as to be activated in response to the voltage drop across said control Resistor becoming greater than the voltage drop across said first resistor; and j. cut-off switch means for providing a second control signal to switch said flip-flop means from said normal output condition to said another output condition responsive to activation of said current limiting switch.
Claim 3
Dependent Claim
23 words
The control system as recited in claim 1, further comprising reset switch means for switching said flip-flop means to said normal output condition.
Claim 4
Dependent Claim
34 words
The control system as recited in claim 1, further comprising damping means subject to said second control signal in parallel with said flip-flop means for delaying the switching thereof to said another output condition.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |