US4415134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hall effect track circuit receiving element
Assignee: Siemens Industry Inc
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Filing: 1982-02-01
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Granted: 1983-11-15
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Expires: 2002-02-01
Abstract
Abstract A railroad signal circuit includes a transmitter and a receiver which have a common connection to the track rails at one end of a signal block. There will be a similar transmitter and receiver at the opposite end of the signal block. A transmit/receive switch is connected in circuit with the transmitter and there is a code following element connecting the receiver to the transmit/receive switch and transmitter. The code following element comprises a Hall effect cell whose output is connected to the receiver.
Inventors
- 👤 H. James Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:57
CPC Classifications
B; B61; B61L; B61L1/00; B61L1/18; B61L1/181; B61L1/188
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
A railroad signal circuit including a transmitter and receiver having a common connection to the track rails at one end of a signal block, a transmit/receive switch connected to said transmitter and a code following element connected to said receiver and connected to said transmit/receive switch and transmitter, said code following element comprising a Hall effect cell whose output is connected to said receiver, said transmit/receive switch preventing signals from said transmitter being received by said receiver.
Claim 2
Dependent Claim
77 words
A railroad signal circuit including a transmitter and receiver having a common connection to the track rails at one end of a signal block, a transmit/receive switch connected to said transmitter and a code following element connected to said receiver and connected to said transmit/receive switch and transmitter, said code following element comprising a Hall effect cell whose output is connected to said receiver, said transmit/receive switch preventing signals from said transmitter being received by said receiver.
Claim 3
Dependent Claim
20 words
The signal circuit of claim 1 further characterized in that said transmit/receive switch is connected in parallel with said transmitter.
Claim 4
Dependent Claim
28 words
The railroad signal circuit of claim 1 further characterized in that said Hall effect cell has a coil, which coil is in series connection with said transmit/receive switch.
Claim 5
Dependent Claim
106 words
The railroad signal circuit of claim 1 further characterized by and including a second transmitter and a second receiver having a common connection to the track rails at the other end of a signal block, said second transmitter and second receiver having a second transmit/receive switch connected to said second transmitter and a second code following element connected to said second receiver and connected to said second transmit/receive switch and second transmitter, said second code following element comprising a Hall effect cell whose output is connected to said second receiver, said second transmit/receive switch preventing signals from said second transmitter being received by said second receiver.
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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |