GB922295A - A detector for hot axle-boxes - Google Patents
A detector for hot axle-boxesInfo
- Publication number
- GB922295A GB922295A GB372461A GB372461A GB922295A GB 922295 A GB922295 A GB 922295A GB 372461 A GB372461 A GB 372461A GB 372461 A GB372461 A GB 372461A GB 922295 A GB922295 A GB 922295A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- radiation
- hot
- pulses
- rotated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/04—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
- B61K9/06—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault by detecting or indicating heat radiation from overheated axles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Spectrometry And Color Measurement (AREA)
- Photovoltaic Devices (AREA)
- Silicon Compounds (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
922,295. Hot axle-box detectors. SOCIETE ANONYME DE TELECOMMUNICATIONS, and COMPAGNIE DE SIGNAUX ET D'- ENTREPRISES ELECTRIQUES. Jan. 31, 1961 [Feb. 1, 1960], No. 3724/61. Class 40 (3). [Also in Group XX] A stationary hot axlebox detector comprises an indium antimonide cell on to which the radiation from the hot boxes is focused. The radiation beam is modulated by a chopper disc. By means of a calcium fluoride lens 1 and a band-pass filter 2 radiation only of wavelengths 5-9 microns passes to the cell 4, thus reducing the effect of ambient solar radiation on the cell. A perforated disc 3 is rotated at high speed to modulate the radiation beam. The pulses from the cell are of short duration for a fast-moving vehicle so, after amplification, the pulses are elongated in a pulse-stretching unit 7. The signals then pass to a relay 9 which can trigger an alarm, and to a temperature recording device 8. In a second embodiment the cell output is mixed with a high-frequency signal in a ring modulator, the chopper disc 3 being rotated at low speed and the difference frequency signal being eliminated before amplification and utilization.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR817233A FR1256004A (en) | 1960-02-01 | 1960-02-01 | Hot box detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB922295A true GB922295A (en) | 1963-03-27 |
Family
ID=8724588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB372461A Expired GB922295A (en) | 1960-02-01 | 1961-01-31 | A detector for hot axle-boxes |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE639245A (en) |
| ES (1) | ES293234A3 (en) |
| FR (1) | FR1256004A (en) |
| GB (1) | GB922295A (en) |
-
1960
- 1960-02-01 FR FR817233A patent/FR1256004A/en not_active Expired
-
1961
- 1961-01-31 GB GB372461A patent/GB922295A/en not_active Expired
-
1963
- 1963-10-28 BE BE639245D patent/BE639245A/xx unknown
- 1963-11-06 ES ES0293234A patent/ES293234A3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES293234A3 (en) | 1964-02-16 |
| BE639245A (en) | 1964-02-17 |
| FR1256004A (en) | 1961-03-17 |
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