Patent US3899216A successfully refreshed from Google Patents.
US3899216A
Expired / Lapsed
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Braking system for a multi-car vehicle
Assignee: Bombardier Transportation Holdings USA Inc
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Filing: 1974-01-28
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Granted: 1975-08-12
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Expires: 1994-01-28
Abstract
Abstract In a multi-car vehicle system, there are transducer means operative with the coupler at each end of each car for sensing the coupling forces acting on the respective couplers. A common braking reference signal is applied to each of the cars, with the magnitude of the reference signal being indicative of the braking effort required for each of the cars. On a given car, the reference signal is modified an amount dependent on the coupling forces sensed. For example, if the sensed coupling forces tend to accelerate the given car, the reference signal is modified such that the brakes are released on the given car, and if the sensed coupling forces tend to decelerate the given car the reference signal is modified such that the brakes are applied on the given car.
Inventors
- 👤 Thomas H Putman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:29
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/24; B60T8/248; B60T13/00; B60T13/10; B60T13/12; B60T7/00; B60T7/12; B60T7/20; B60T8/17; B60T8/1701; B60T8/1705; B60T8/32; B60T8/321; B60T8/323; G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/0891
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
200 words
In apparatus for controlling the application of brakes on one car of a coupled multi-car vehicle, the combination comprising: valve means, including first and second valves; means for causing said second and first valves to move towards one valve condition and the opposite valve condition respectively in response to a sensed deceleraTion when said vehicle is moving in one direction, and for causing said second and first valves to move towards said opposite valve condition and one valve condition respectively in response to a sensed deceleration when said vehicle is moving in the opposite direction; means for applying the brakes on said one car in response to said first valve being in said one condition when said vehicle moves in said one direction and in response to said second valve being in said one condition when said vehicle moves in said opposite direction; means for sensing the coupling forces acting on at least one end of said one car; and means for releasing the brakes on said one car if the sensed coupling forces tend to accelerate said one car, and for applying the brakes on said one car if the sensed coupling forces tend to decelerate said one car.
Claim 2
Dependent Claim
200 words
In apparatus for controlling the application of brakes on one car of a coupled multi-car vehicle, the combination comprising: valve means, including first and second valves; means for causing said second and first valves to move towards one valve condition and the opposite valve condition respectively in response to a sensed deceleraTion when said vehicle is moving in one direction, and for causing said second and first valves to move towards said opposite valve condition and one valve condition respectively in response to a sensed deceleration when said vehicle is moving in the opposite direction; means for applying the brakes on said one car in response to said first valve being in said one condition when said vehicle moves in said one direction and in response to said second valve being in said one condition when said vehicle moves in said opposite direction; means for sensing the coupling forces acting on at least one end of said one car; and means for releasing the brakes on said one car if the sensed coupling forces tend to accelerate said one car, and for applying the brakes on said one car if the sensed coupling forces tend to decelerate said one car.
Claim 3
Dependent Claim
96 words
In apparatus for controlling the application of brakes on one car of a coupled multi-car vehicle, the combination comprising: means for providing a reference braking signal common to each car of said multi-car vehicle and having a magnitude indicative of the desired braking effort for each car; means for sensing the coupling forces acting on each end of said one car; means for modifying said reference braking signal for said one car dependent on the sensed coupling forces; and means for braking said one car an amount determined by the magnitude of the modified reference signal.
Claim 4
Dependent Claim
96 words
In apparatus for controlling the application of brakes on one car of a coupled multi-car vehicle, the combination comprising: means for providing a reference braking signal common to each car of said multi-car vehicle and having a magnitude indicative of the desired braking effort for each car; means for sensing the coupling forces acting on each end of said one car; means for modifying said reference braking signal for said one car dependent on the sensed coupling forces; and means for braking said one car an amount determined by the magnitude of the modified reference signal.
Claim 5
Dependent Claim
146 words
In apparatus for controlling the application of brakes on one car of a coupled multi-car vehicle, the combination comprising: means for providing a reference braking signal common to each car of said multi-car vehicle which has a magnitude indicative of the desired common braking effort for each car; means for sensing the coupling forces acting on one end of said one car for providing a first signal having a magnitude indicative of the sensed coupling forces; means for sensing the coupling forces acting on the other end of said one car for providing a second signal having a magnitude indicative of the sensed coupling forces; means for summing said reference braking signal with said first and second signals for providing a modified braking signal for said one car; and means for braking said one car an amount determined by the magnitude of said modified braking signal.
Claim 6
Dependent Claim
146 words
In apparatus for controlling the application of brakes on one car of a coupled multi-car vehicle, the combination comprising: means for providing a reference braking signal common to each car of said multi-car vehicle which has a magnitude indicative of the desired common braking effort for each car; means for sensing the coupling forces acting on one end of said one car for providing a first signal having a magnitude indicative of the sensed coupling forces; means for sensing the coupling forces acting on the other end of said one car for providing a second signal having a magnitude indicative of the sensed coupling forces; means for summing said reference braking signal with said first and second signals for providing a modified braking signal for said one car; and means for braking said one car an amount determined by the magnitude of said modified braking signal.
Claim 7
Dependent Claim
44 words
The combination claimed in claim 3, wherein said means for sensing the coupling forces acting on one end of said one car and said means for sensing the coupling forces acting on the other end of said one car each comprises a force transducer.
Claim 8
Dependent Claim
16 words
The combination claimed in claim 4, wherein each said force transducer comprises a linear differential transformer.
Claim 9
Dependent Claim
15 words
The combination claimed in claim 5, wherein said means for summing comprises a summing amplifier.
Claim 10
Dependent Claim
19 words
The combination claimed in claim 6 including demodulator means connected between each linear differential transformer, and said summing amplifier.
Claim 11
Dependent Claim
65 words
The combination claimed in claim 7, wherein said means for braking includes an inertial mass, the movement of which is controlled by said modified braking signal, with the movement of said inertial mass in one direction tending to release the brakes on said one car, and the movement of said inertial mass in the opposite direction tending to apply the brakes on said one car.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |