GB521386A - Magnetic apparatus for detecting the passage of vehicles and other traffic - Google Patents

Magnetic apparatus for detecting the passage of vehicles and other traffic

Info

Publication number
GB521386A
GB521386A GB14440/39A GB1444039A GB521386A GB 521386 A GB521386 A GB 521386A GB 14440/39 A GB14440/39 A GB 14440/39A GB 1444039 A GB1444039 A GB 1444039A GB 521386 A GB521386 A GB 521386A
Authority
GB
United Kingdom
Prior art keywords
traffic
passage
detecting
vehicles
aug
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
GB14440/39A
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.)
AUTOMATIC SIGNAL CORP
Original Assignee
AUTOMATIC SIGNAL CORP
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 AUTOMATIC SIGNAL CORP filed Critical AUTOMATIC SIGNAL CORP
Publication of GB521386A publication Critical patent/GB521386A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Traffic Control Systems (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

521,386. Road signals for controlling traffic ; magnetic tests. AUTOMATIC SIGNAL CORPORATION. Aug. 15, 1938, No. 14440/39. Convention date, Aug. 14, 1937. Divided out of 521,339. [Class 118 (ii)] [Also in Group XXXVI] A detector for detecting the passage of traffic containing magnetisable material comprises coils 12, 13 connected in parallel and linked with the field produced by magnetic bars 10 arranged transversely to the direction of traffic. A third coil 14 may be connected in series opposition, the coils being mounted in a watertight casing 17 on a tube 15, held in position by cones 16.
GB14440/39A 1937-08-14 1938-08-15 Magnetic apparatus for detecting the passage of vehicles and other traffic Expired GB521386A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US159059A US2201146A (en) 1937-08-14 1937-08-14 Traffic detector

Publications (1)

Publication Number Publication Date
GB521386A true GB521386A (en) 1940-05-20

Family

ID=22570911

Family Applications (2)

Application Number Title Priority Date Filing Date
GB24005/38A Expired GB521339A (en) 1937-08-14 1938-08-15 Magnetic apparatus for detecting the passage of vehicles and other traffic
GB14440/39A Expired GB521386A (en) 1937-08-14 1938-08-15 Magnetic apparatus for detecting the passage of vehicles and other traffic

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB24005/38A Expired GB521339A (en) 1937-08-14 1938-08-15 Magnetic apparatus for detecting the passage of vehicles and other traffic

Country Status (3)

Country Link
US (1) US2201146A (en)
FR (1) FR841919A (en)
GB (2) GB521339A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448020A (en) * 1943-05-17 1948-08-31 Richard C Darnell Device for hidden explosive mines
FR956774A (en) * 1944-05-18 1950-02-07
US2996663A (en) * 1944-08-17 1961-08-15 Bell Telephone Labor Inc Magnetic field gradiometer
US2450166A (en) * 1944-08-18 1948-09-28 Nicholas S Rich Electrical detection apparatus
USRE29019E (en) * 1969-01-22 1976-10-26 Yeda Research & Development Co. Ltd. Intruder detection system
US3754223A (en) * 1970-01-21 1973-08-21 Yeda Res & Dev Intruder detection system
US3747036A (en) * 1972-01-17 1973-07-17 Honeywell Inc Magnetic line sensor
US4943805A (en) * 1986-11-13 1990-07-24 Dennison James L Conduit-enclosed induction loop for a vehicle detector
EP1647959B1 (en) * 2004-10-16 2006-10-11 SkiData AG Vehicle detection system
US11712637B1 (en) 2018-03-23 2023-08-01 Steven M. Hoffberg Steerable disk or ball

Also Published As

Publication number Publication date
GB521339A (en) 1940-05-20
US2201146A (en) 1940-05-21
FR841919A (en) 1939-06-01

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