GB1114518A - Vehicle identification apparatus - Google Patents

Vehicle identification apparatus

Info

Publication number
GB1114518A
GB1114518A GB2012566A GB2012566A GB1114518A GB 1114518 A GB1114518 A GB 1114518A GB 2012566 A GB2012566 A GB 2012566A GB 2012566 A GB2012566 A GB 2012566A GB 1114518 A GB1114518 A GB 1114518A
Authority
GB
United Kingdom
Prior art keywords
receiver
transmitter
transponder
crystals
wagon
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
GB2012566A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB1114518A publication Critical patent/GB1114518A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or trains
    • B61L25/04—Indicating or recording train identities

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

1,114,518. Inductive signalling; transponder apparatus. RADIO CORPORATION OF AMERICA. 6 May, 1966 [17 May, 1965], No. 20125/66. Headings H4U and H4L. [Also in Division B7] In a system for identifying vehicles, e.g. railway wagons, as they pass a given point, each wagon 10 carries a transponder comprising a plurality of piezo-electric crystals 16, each tuned to a different frequency and connected in parallel to a loop aerial 18. A stationary transmitting loop 20 is positioned between the rails 12 and is connected to a transmitter 24 and via gate to a receiver 26. At the transmitter, pulses are generated at 28, shaped at 30 and modulate a carrier of about 2 Mc/s. at 32, the input to the receiver being blocked for the duration of each pulse from shaper 30. This excites the crystals 16 in the transponder and they continue to oscillate for a short time when the pulse from the transmitter ceases, the resulting signals being transmitted via loops 18, 20 to the receiver 26. Each wagon is allotted a characteristic combination of frequencies which energize corresponding crystals 40 at the receiver and via detectors 42 operate appropriate indicators 44.
GB2012566A 1965-05-17 1966-05-06 Vehicle identification apparatus Expired GB1114518A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US39826465A 1965-05-17 1965-05-17

Publications (1)

Publication Number Publication Date
GB1114518A true GB1114518A (en) 1968-05-22

Family

ID=23574696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2012566A Expired GB1114518A (en) 1965-05-17 1966-05-06 Vehicle identification apparatus

Country Status (1)

Country Link
GB (1) GB1114518A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3104013A1 (en) * 1980-02-07 1982-02-25 Meisei Electric Co., Ltd., Tokyo System for detecting an abnormal internal tyre pressure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3104013A1 (en) * 1980-02-07 1982-02-25 Meisei Electric Co., Ltd., Tokyo System for detecting an abnormal internal tyre pressure

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