GB607868A - 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
GB607868A
GB607868A GB14617/45A GB1461745A GB607868A GB 607868 A GB607868 A GB 607868A GB 14617/45 A GB14617/45 A GB 14617/45A GB 1461745 A GB1461745 A GB 1461745A GB 607868 A GB607868 A GB 607868A
Authority
GB
United Kingdom
Prior art keywords
traffic
coils
vehicles
passage
detecting
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
GB14617/45A
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 GB607868A publication Critical patent/GB607868A/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)

Abstract

607,868. Impedance networks. AUTOMATIC SIGNAL CORPORATION. June 8, 1945, No. 14617. Convention date, May 18, 1944. [Class 40 (viii)] [Also in Groups XXXVI and XXXVIII] A road traffic detector employs two oppositely wound sets of coils 14, 140 and 15, 150 spaced beneath the roadway in the direction of traffic flow. Each coil is wound on a vertical rod of magnetic material so that with the passing of traffic an E.M.F. is induced. The coils 14, 140 and 15, 150 are associated with resistance-capacity delay networks 40, 42, 44, 46 and 41, 43, 45, 47 respectively so that for traffic in one direction the successive impulses due to the respective coils are superimposed and neutralize one another as shown in Fig. 8, whereas for traffic in the other direction separate impulses are effective on an amplifier to cause the operation of a relay, Fig. 7 (not shown). Sizes are given in the Specification for the components of each network, whereby for any speed between 3 and 60 m.p.h. the result described above may be achieved.
GB14617/45A 1944-05-18 1945-06-08 Magnetic apparatus for detecting the passage of vehicles and other traffic Expired GB607868A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US536129A US2441554A (en) 1944-05-18 1944-05-18 Traffic detector

Publications (1)

Publication Number Publication Date
GB607868A true GB607868A (en) 1948-09-07

Family

ID=24137275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14617/45A Expired GB607868A (en) 1944-05-18 1945-06-08 Magnetic apparatus for detecting the passage of vehicles and other traffic

Country Status (3)

Country Link
US (1) US2441554A (en)
FR (1) FR956774A (en)
GB (1) GB607868A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496031A (en) * 1947-12-30 1950-01-31 Rca Corp Dual microphone sound detector system
US2532231A (en) * 1949-05-21 1950-11-28 Streeter Amet Co Traffic detector
US3798743A (en) * 1972-03-09 1974-03-26 E Griswold Method of installing photoelectric cell in a driveway
US4943805A (en) * 1986-11-13 1990-07-24 Dennison James L Conduit-enclosed induction loop for a vehicle detector

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1062361A (en) * 1906-01-03 1913-05-20 Malcolm P Ryder Generator of intermittent electric currents.
US2014410A (en) * 1927-01-03 1935-09-17 George W Pierce Electromagnetostrictive vibrator
US1992214A (en) * 1928-11-12 1935-02-26 Katz David Traffic detector
US2064882A (en) * 1931-05-21 1936-12-22 Henry B Brainerd Traffic signal control
US2166090A (en) * 1935-08-03 1939-07-11 Cooper Benjamin Treadle controlled system
US2119811A (en) * 1935-08-20 1938-06-07 Frank D Hayes Resilient induction magnet
BE424877A (en) * 1937-02-06
US2201146A (en) * 1937-08-14 1940-05-21 Automatic Signal Corp Traffic detector

Also Published As

Publication number Publication date
FR956774A (en) 1950-02-07
US2441554A (en) 1948-05-18

Similar Documents

Publication Publication Date Title
GB607868A (en) Magnetic apparatus for detecting the passage of vehicles and other traffic
FR1087498A (en) Vehicle Operated Traffic Signal Control System
US2201145A (en) Traffic detector
FR1090026A (en) Signal representation system, in particular for television and radar
CH323785A (en) Signal generator for telegraph transmitter
FR1073593A (en) Trap and barrier for all vehicles
FR1114732A (en) Traffic control system
CH317751A (en) Suspension device for rail vehicle axle
GB661631A (en) Improvements in or relating to frequency selective circuits
CH323786A (en) Signal generator for telegraph transmitter
FR1409596A (en) Receiver enhancements for an aircraft landing system
FR1093546A (en) Television signal transmission system
FR1168079A (en) Traffic signaling system
FR1080991A (en) Device for the separation of mixtures of particles of different specific gravities, by the method of flotation and deposition
FR1023756A (en) Hydro-mechanical brake system for road vehicles
FR1107127A (en) Transmission system for television signals
CA486555A (en) Traffic signal control system
FR1061091A (en) Selective signal transmission system
FR1068112A (en) Anti-roll system for road vehicles
FR904977A (en) Signal receiver for powerline telephone system
FR1095339A (en) Adjustable suspension system for shutters
CA490632A (en) Traffic counting apparatus
CA490500A (en) Railway signal control system
FR1088702A (en) Magnetic amplifier control system
FR1351753A (en) Magnetic signal transmission device for pneumatic tube