US3784813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test apparatus for pneumatic brake system
Assignee: General Electric Co
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Filing: 1972-06-06
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Granted: 1974-01-08
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Expires: 1992-06-06
Abstract
Abstract An apparatus for cyclical testing in integrity of a railway pneumatic brake system. A transmitter and receiver with associated induction loops are situated on opposite sides of the track, and are magnetically coupled to respective inductive coils located on opposite sides of a rearward track car. A switch electrically couples the inductive coils in response to the pneumatic pressure in the brake system, the signal reception from the transmitter to receiver thereby providing an indication of system integrity. In an automatic railroad operation the test can be made by a single person at the remote operation station, or be programmed as part of the control cycle.
Inventors
- 👤 P Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:50
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/228
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
An apparatus for testing a pneumatic system on a tracked vehicle, the apparatus comprising: a. a signal producing means disposed on the track wayside in close proximity to the track; b. a first inductive device located on the vehicle for selective stationing adjacent said signal producing means so as to be magnetically coupled thereto when a signal is produced therein; c. a second inductive device located on the vehicle in spaced relationship to said first inductive device; d. coupling means located on the vehicle for electrically coupling said first and second inductive devices in response to the condition of a pneumatic system aboArd the vehicle; and e. a signal receiving means disposed on the track wayside in spaced relationship to said signal producing means, said signal receiving means being adjacent and magnetically coupled to said second inductive device when the vehicle is selectively stationed, so as to be responsive to said signal producing means through said coupling means.
Claim 2
Independent Claim
158 words
An apparatus for testing a pneumatic system on a tracked vehicle, the apparatus comprising: a. a signal producing means disposed on the track wayside in close proximity to the track; b. a first inductive device located on the vehicle for selective stationing adjacent said signal producing means so as to be magnetically coupled thereto when a signal is produced therein; c. a second inductive device located on the vehicle in spaced relationship to said first inductive device; d. coupling means located on the vehicle for electrically coupling said first and second inductive devices in response to the condition of a pneumatic system aboArd the vehicle; and e. a signal receiving means disposed on the track wayside in spaced relationship to said signal producing means, said signal receiving means being adjacent and magnetically coupled to said second inductive device when the vehicle is selectively stationed, so as to be responsive to said signal producing means through said coupling means.
Claim 3
Dependent Claim
45 words
An apparatus as set forth in claim 1 wherein said pneumatic system comprises a pneumatic brake system having an air supply line extending the length of the train, and further wherein said inductive devices and said coupling device are located proximate the rearward end thereof.
Claim 4
Dependent Claim
30 words
An apparatus as set forth in claim 2, wherein said signal producing means and said signal receiving means have associated elongate inductive loops aligned in parallel relationship with the trackway.
Claim 5
Independent Claim
181 words
A system for testing the integrity of a pneumatic brake system of a railway train having an air supply line extending the length thereof, the supply line adapted to have the pressure varied therein to effect braking of the train, the system comprising: a. a signal producing means disposed on the track wayside in close proximity to the track; b. a first inductive device located on the train for selective stationing adjacent to said signal producing means so as to be magnetically coupled thereto when a signal is produced therein; c. a second inductive device located on the train in spaced relationship to said first inductive device; d. a pressure switch located on the train for electrically coupling said first and second inductive devices in response to the pressure in the air supply line; and e. a signal receiving means disposed on the track wayside in spaced relationship to said signal producing means said signal receiving means being adjacent and magnetically coupled to said second inductive device, so as to be responsive to said signal producing means through said coupling means.
Claim 6
Independent Claim
181 words
A system for testing the integrity of a pneumatic brake system of a railway train having an air supply line extending the length thereof, the supply line adapted to have the pressure varied therein to effect braking of the train, the system comprising: a. a signal producing means disposed on the track wayside in close proximity to the track; b. a first inductive device located on the train for selective stationing adjacent to said signal producing means so as to be magnetically coupled thereto when a signal is produced therein; c. a second inductive device located on the train in spaced relationship to said first inductive device; d. a pressure switch located on the train for electrically coupling said first and second inductive devices in response to the pressure in the air supply line; and e. a signal receiving means disposed on the track wayside in spaced relationship to said signal producing means said signal receiving means being adjacent and magnetically coupled to said second inductive device, so as to be responsive to said signal producing means through said coupling means.
Claim 7
Dependent Claim
41 words
A system as set forth in claim 4 wherein said signal producing means and said signal receiving means are disposed on opposite sides of the trackway, and said first and second inductive devices are located on opposite sides of the train.
Claim 8
Dependent Claim
33 words
A system as set forth on claim 4 wherein said inductive devices and said coupling devices are located proximate the rearward end of the train and comprise the sole brake test apparatus thereon.
Claim 9
Dependent Claim
30 words
A system as set forth in claim 4 wherein said signal producing means and said signal receiving means have associated elongate inductive loops aligned in parallel relationship with the trackway.
Claim 10
Dependent Claim
32 words
A system as set forth in claim 7 and including a plurality of transpositions coupled across said elongate inductive loop of said transmitter, to minimize the induction of current into the railway.
Claim 11
Dependent Claim
32 words
A system as set forth in claim 4 wherein said first and second inductive devices are capacitance tuned to the frequency of said signal producing means to maximize the current flow therein.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |