GB1242218A - Improvements in or relating to proximity switches - Google Patents

Improvements in or relating to proximity switches

Info

Publication number
GB1242218A
GB1242218A GB4625067A GB4625067A GB1242218A GB 1242218 A GB1242218 A GB 1242218A GB 4625067 A GB4625067 A GB 4625067A GB 4625067 A GB4625067 A GB 4625067A GB 1242218 A GB1242218 A GB 1242218A
Authority
GB
United Kingdom
Prior art keywords
rail
magnet
polepiece
oct
gap
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
GB4625067A
Inventor
Michael Leo George Hill
Lionel Raymond Frank Thompson
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.)
Hawker Siddeley Dynamics Ltd
Original Assignee
Hawker Siddeley Dynamics Ltd
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 Hawker Siddeley Dynamics Ltd filed Critical Hawker Siddeley Dynamics Ltd
Priority to GB4625067A priority Critical patent/GB1242218A/en
Publication of GB1242218A publication Critical patent/GB1242218A/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 train
    • B61L1/16—Devices for counting axles; Devices for counting vehicles
    • B61L1/163—Detection devices
    • B61L1/165—Electrical

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1,242,218. Wheel detector. HAWKER SIDDELEY DYNAMICS Ltd. 8 Oct., 1968 [10 Oct., 1967], No. 46250/67. Heading B7N. A rail vehicle wheel detector comprises a permanent magnet 11, a first polepiece 12 which secures the magnet to rail web 13, a second polepiece 15 which with member 17 is tapered 26, 27 to form a gap 18 in which a magnetic flux dependent resistance or Hall voltage plate 23 is inserted and an extension 21 of the member 17 which lies immediately below the position occupied by a passing wheel flange. The gap 18 is filled with a plastics moulding compound 24. In a further arrangement, Figs. 4 and 5 (not shown), a single magnet is used with three detector elements spaced along the rail.
GB4625067A 1967-10-10 1967-10-10 Improvements in or relating to proximity switches Expired GB1242218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4625067A GB1242218A (en) 1967-10-10 1967-10-10 Improvements in or relating to proximity switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4625067A GB1242218A (en) 1967-10-10 1967-10-10 Improvements in or relating to proximity switches

Publications (1)

Publication Number Publication Date
GB1242218A true GB1242218A (en) 1971-08-11

Family

ID=10440464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4625067A Expired GB1242218A (en) 1967-10-10 1967-10-10 Improvements in or relating to proximity switches

Country Status (1)

Country Link
GB (1) GB1242218A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1899209A1 (en) * 2005-07-01 2008-03-19 Portec Rail Products, Inc. Railway wheel sensor
WO2021004800A1 (en) * 2019-07-05 2021-01-14 Build Connected B.V. Device for detecting a wheel on a rail track

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1899209A1 (en) * 2005-07-01 2008-03-19 Portec Rail Products, Inc. Railway wheel sensor
EP1899209A4 (en) * 2005-07-01 2010-06-30 Portec Rail Products Ltd Railway wheel sensor employing hall effect devices
AU2006265719B2 (en) * 2005-07-01 2011-07-07 Portec, Rail Products Ltd. Railway wheel sensor employing hall effect devices
WO2021004800A1 (en) * 2019-07-05 2021-01-14 Build Connected B.V. Device for detecting a wheel on a rail track
NL2023451B1 (en) * 2019-07-05 2021-02-02 Build Connected B V Device for detecting a wheel on a rail track
CN114340971A (en) * 2019-07-05 2022-04-12 构建互联有限公司 Device for detecting wheels on a rail
EP3994045B1 (en) 2019-07-05 2023-08-02 Build Connected B.V. Device for detecting a wheel on a rail track

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