GB1136440A - Improvements in or relating to devices for the detection of the presence of metal - Google Patents

Improvements in or relating to devices for the detection of the presence of metal

Info

Publication number
GB1136440A
GB1136440A GB5720866A GB5720866A GB1136440A GB 1136440 A GB1136440 A GB 1136440A GB 5720866 A GB5720866 A GB 5720866A GB 5720866 A GB5720866 A GB 5720866A GB 1136440 A GB1136440 A GB 1136440A
Authority
GB
United Kingdom
Prior art keywords
train
signal
oscillator
coils
generation
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
Application number
GB5720866A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie des Freins et Signaux Westinghouse SA
Original Assignee
Compagnie des Freins et Signaux Westinghouse SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Compagnie des Freins et Signaux Westinghouse SA filed Critical Compagnie des Freins et Signaux Westinghouse SA
Publication of GB1136440A publication Critical patent/GB1136440A/en
Expired legal-status Critical Current

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 vehicle train, e.g. pedals
    • B61L1/16—Devices for counting axles; Devices for counting vehicles
    • B61L1/163—Detection devices
    • B61L1/165—Electrical
    • 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 vehicle train, e.g. pedals
    • B61L1/02—Electric devices associated with track, e.g. rail contacts
    • B61L1/10—Electric devices associated with track, e.g. rail contacts actuated by electromagnetic radiation; actuated by particle radiation
    • 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 vehicle train, e.g. pedals
    • B61L1/16—Devices for counting axles; Devices for counting vehicles
    • B61L1/167—Circuit details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L13/00—Operation of signals from the vehicle or by the passage of the vehicle
    • B61L13/04—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors
    • B61L13/047—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors controlling inductively or magnetically

Abstract

1,136,440. Train detector. COMPAGNIE DES FREINS ET SIGNAUX WESTING- HOUSE. 21 Dec., 1966 [5 Jan., 1966], No. 57208/66. Heading B7N. An arrangement for detecting the presence of a metallic mass, e.g. a train, comprises a number, e.g. three transistor oscillator circuits 1, 2 and 3 of similar form but operating at different frequencies arranged such that their respective tuning coils 20, 21; 51, 52 and 70, 71 are disposed in line adjacent and parallel to a railway track and connected such that the output signal of each oscillator controls the generation of a signal in the following oscillator and the last oscillator controls the generation of a signal from an output stage 82. The presence of a train wheel adjacent a tuning coil stops the associated circuit oscillating with the result that the following oscillators are cut off and the output stage, in the absence of an input signal, signals the presence of a train. The detection zones of the respective tuning coils overlap and the overall length of the arrangement is greater than the length of a train vehicle wheel base. The tuning coils are wound on ferrite rods 100 and supported on a plate 109 beneath the head of rail 107. The coils are partially screened by a metal bracket 108 and the associated circuits are embedded in a block 110 of epoxy resin disposed beneath the plate 109.
GB5720866A 1966-01-05 1966-12-21 Improvements in or relating to devices for the detection of the presence of metal Expired GB1136440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR44958A FR1476638A (en) 1966-01-05 1966-01-05 Metal presence detector device

Publications (1)

Publication Number Publication Date
GB1136440A true GB1136440A (en) 1968-12-11

Family

ID=8597877

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5720866A Expired GB1136440A (en) 1966-01-05 1966-12-21 Improvements in or relating to devices for the detection of the presence of metal

Country Status (2)

Country Link
FR (1) FR1476638A (en)
GB (1) GB1136440A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001064494A1 (en) * 2000-02-28 2001-09-07 Urzua Ochoa Alejandro Cesar Train derailment detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001064494A1 (en) * 2000-02-28 2001-09-07 Urzua Ochoa Alejandro Cesar Train derailment detector

Also Published As

Publication number Publication date
FR1476638A (en) 1967-04-14

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