GB1216160A - The detection of obstacles - Google Patents

The detection of obstacles

Info

Publication number
GB1216160A
GB1216160A GB4578169A GB4578169A GB1216160A GB 1216160 A GB1216160 A GB 1216160A GB 4578169 A GB4578169 A GB 4578169A GB 4578169 A GB4578169 A GB 4578169A GB 1216160 A GB1216160 A GB 1216160A
Authority
GB
United Kingdom
Prior art keywords
barriers
beams
sept
relay
detection
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
GB4578169A
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.)
Societe de Fabrication dInstruments de Mesure SFIM SA
Original Assignee
Societe de Fabrication dInstruments de Mesure SFIM 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 Societe de Fabrication dInstruments de Mesure SFIM SA filed Critical Societe de Fabrication dInstruments de Mesure SFIM SA
Publication of GB1216160A publication Critical patent/GB1216160A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L29/00—Safety means for rail/road crossing traffic
    • B61L29/02—Guards or obstacles for preventing access to the route

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1,216,160. Level crossings. SOC. DE FABRICATION D'INSTRUMENTS DE MESURE. 17 Sept., 1969 [17 Sept., 1968], No. 45781/69. Heading B7N. The presence of a vehicle between the barriers 3, 4, 5, 6 of a level crossing is signalled by the interruption of one or more beams 7-10 &c. of electromagnetic radiation extending between emitters 11-14 &c. on barriers 5 and 6 to receivers on barriers 3 and 4. The beams which have a wavelength of 3 cm. are alternately vertically and horizontally polarized and similarly polarized beams are modulated at different frequencies. Each receiver has an associated relay and the relay contacts are connected in series to an alarm circuit. Relay time constants are adjusted to prevent detection of pedestrians.
GB4578169A 1968-09-17 1969-09-17 The detection of obstacles Expired GB1216160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR166447 1968-09-17

Publications (1)

Publication Number Publication Date
GB1216160A true GB1216160A (en) 1970-12-16

Family

ID=8654621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4578169A Expired GB1216160A (en) 1968-09-17 1969-09-17 The detection of obstacles

Country Status (7)

Country Link
BE (1) BE738785A (en)
CH (1) CH492596A (en)
DE (1) DE1947076C3 (en)
FR (1) FR1587373A (en)
GB (1) GB1216160A (en)
LU (1) LU59437A1 (en)
NL (1) NL153485B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2656706C2 (en) * 1976-12-15 1986-04-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Device for detecting obstacles between the barriers of a level crossing on the same rails

Also Published As

Publication number Publication date
NL6914063A (en) 1970-03-19
LU59437A1 (en) 1970-01-08
DE1947076B2 (en) 1978-04-27
DE1947076C3 (en) 1978-12-21
DE1947076A1 (en) 1970-03-26
BE738785A (en) 1970-02-16
NL153485B (en) 1977-06-15
CH492596A (en) 1970-06-30
FR1587373A (en) 1970-03-20

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