GB410527A - Improvements in or relating to apparatus for signalling the passage of vehicles - Google Patents

Improvements in or relating to apparatus for signalling the passage of vehicles

Info

Publication number
GB410527A
GB410527A GB3328432A GB3328432A GB410527A GB 410527 A GB410527 A GB 410527A GB 3328432 A GB3328432 A GB 3328432A GB 3328432 A GB3328432 A GB 3328432A GB 410527 A GB410527 A GB 410527A
Authority
GB
United Kingdom
Prior art keywords
passage
copper bar
transformer
amplifier
vehicle
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
GB3328432A
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 ELECTRIC CO Ltd
Original Assignee
AUTOMATIC ELECTRIC CO 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 AUTOMATIC ELECTRIC CO Ltd filed Critical AUTOMATIC ELECTRIC CO Ltd
Priority to GB3328432A priority Critical patent/GB410527A/en
Publication of GB410527A publication Critical patent/GB410527A/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

Abstract

410,527. Road signals for controlling traffic; counting railway vehicles. AUTOMATIC ELECTRIC CO., Ltd., Strowger Works, and WOODHEAD, H. S., 23, Watergate Lane, Woolton, both in Liverpool. Nov. 24, 1932, No. 33284. [Class 118 (ii).] The passage of a vehicle is detected or counted by its effect on a balanced magnetic circuit. The detector comprises a loop A of copper bar, fed with alternating current from transformer D, and two loops B and C of copper bar connected in series in opposition and connected to an amplifier over transformer E. Normally the currents in B and C are equal but of opposite phase so that no current flows to the amplifier. When a vehicle passes, the magnetic balance is disturbed and current passes through E to controlling or counting mechanism. The two coils B and C may be mounted at an angle to A or may be replaced by a single coil mounted at right angles to A.
GB3328432A 1932-11-24 1932-11-24 Improvements in or relating to apparatus for signalling the passage of vehicles Expired GB410527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3328432A GB410527A (en) 1932-11-24 1932-11-24 Improvements in or relating to apparatus for signalling the passage of vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3328432A GB410527A (en) 1932-11-24 1932-11-24 Improvements in or relating to apparatus for signalling the passage of vehicles

Publications (1)

Publication Number Publication Date
GB410527A true GB410527A (en) 1934-05-24

Family

ID=10350921

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3328432A Expired GB410527A (en) 1932-11-24 1932-11-24 Improvements in or relating to apparatus for signalling the passage of vehicles

Country Status (1)

Country Link
GB (1) GB410527A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348501A (en) * 1999-03-31 2000-10-04 Diamond Consult Serv Ltd Loop sensing apparatus for traffic detection
US6337640B2 (en) 1999-03-31 2002-01-08 Diamond Consulting Services Limited Inductive loop sensor for traffic detection, and traffic monitoring apparatus and method using such a loop sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348501A (en) * 1999-03-31 2000-10-04 Diamond Consult Serv Ltd Loop sensing apparatus for traffic detection
US6337640B2 (en) 1999-03-31 2002-01-08 Diamond Consulting Services Limited Inductive loop sensor for traffic detection, and traffic monitoring apparatus and method using such a loop sensor
US6483443B1 (en) * 1999-03-31 2002-11-19 Diamon Consulting Services Limited Loop sensing apparatus for traffic detection
GB2348501B (en) * 1999-03-31 2003-07-30 Diamond Consulting Services Lt Loop sensing apparatus for traffic detection

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