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Patent US5016840A successfully refreshed from Google Patents.
US5016840A
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Method to authorize a head of train unit to transmit emergency commands to its associated rear unit
Assignee: Westinghouse Air Brake Co
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Filing: 1989-10-30
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Granted: 1991-05-21
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Expires: 2009-10-30
Abstract
Abstract An EOT emergency arming apparatus and method in which an engineer at the HOT operates a standard air brake control and responds to a resulting report of change in air pressure from the EOT within a prescribed short interval. The response is a signal which includes the EOT unique identification code, and if received within the short interval is interpreted by the EOT as if the EOT ARM switch had been activated.
Inventors
- 👤 Angel P. Bezos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:37
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/228; B60L; B60L15/00; B60L15/32; B60T13/00; B60T13/10; B60T13/66; B60T13/665; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
A method for arming a head of train unit to control emergency functions at a rear of train unit upon command over a telecommunication unit link, comprising the steps of: manually initiating at the head of train unit a change in pressure in the brake pressure pipe coupled between the head of train unit and the rear of train unit; sensing at said rear of train unit said change in pressure; transmitting from said end of train unit an indication of said change in pressure to said head of train unit; displaying said indication of said change in pressure at said head of train unit; and manually initiating the transmission of a predetermined signal to said end of train unit over said telecommunications link within a predetermined short time interval following the display of said pressure change.
Claim 2
Independent Claim
137 words
A method for arming a head of train unit to control emergency functions at a rear of train unit upon command over a telecommunication unit link, comprising the steps of: manually initiating at the head of train unit a change in pressure in the brake pressure pipe coupled between the head of train unit and the rear of train unit; sensing at said rear of train unit said change in pressure; transmitting from said end of train unit an indication of said change in pressure to said head of train unit; displaying said indication of said change in pressure at said head of train unit; and manually initiating the transmission of a predetermined signal to said end of train unit over said telecommunications link within a predetermined short time interval following the display of said pressure change.
Claim 3
Dependent Claim
25 words
A method for arming a head of train unit as in claim 1 wherein said predetermined signal is a standard Manual Communications Test Link signal.
Claim 4
Dependent Claim
27 words
A method for arming a head of train unit as in claim 2 further including the step of inhibiting automatic transmission of a Communications Test Link signal.
Claim 5
Dependent Claim
22 words
A method for arming a head of train unit as in claim 1 wherein said predetermined signal is a special arming signal.
Claim 6
Dependent Claim
83 words
A method for arming a head of train unit as in claim 1 including further the step responding to said predetermined signal and transmitting to said head of train unit over said telecommunications link an identifier specifically for arming the system to allow the end of train unit to respond to emergency control commands from the head of train unit when said manually initiated predetermined signal is received at said end of train unit within a predetermined short interval follow said pressure change.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |