GB809574A - Improvements in or relating to electrical signal light systems - Google Patents

Improvements in or relating to electrical signal light systems

Info

Publication number
GB809574A
GB809574A GB183/57A GB18357A GB809574A GB 809574 A GB809574 A GB 809574A GB 183/57 A GB183/57 A GB 183/57A GB 18357 A GB18357 A GB 18357A GB 809574 A GB809574 A GB 809574A
Authority
GB
United Kingdom
Prior art keywords
photo
cell
resistor
relating
jan
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
GB183/57A
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.)
Svenska AB Gasaccumulator
Original Assignee
Svenska AB Gasaccumulator
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 Svenska AB Gasaccumulator filed Critical Svenska AB Gasaccumulator
Publication of GB809574A publication Critical patent/GB809574A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Traffic Control Systems (AREA)

Abstract

809,574. Photo-electric control systems. SVENSKA AKTIEBOLAGET GASACCUMULATOR. Jan. 2, 1957 [Jan. 26, 1956], No. 183/57. Class 40 (3). In the control of the brightness of signal lights, particularly road traffic signals, by the variation of the general lighting and by approaching car &c. lights, a photo-cell 8 in employed in conjunction with a transductor 19-21, a transistor or a relay which shortcircuits a resistor in the circuit of a lamp 1. The circuit also includes a variable resistor 9. In a modification, Fig. 6, two photo-electric cells 81, 8<SP>11</SP> to receive light from directions 14, 13 are arranged in series with a non-linear resistor 26 and a variable resistor 9. In another form, light from two directions falls on a single photo-cell, on adjustable shutter being provided from one direction. The cell 8 is screened from direct sunlight.
GB183/57A 1956-01-26 1957-01-02 Improvements in or relating to electrical signal light systems Expired GB809574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE809574X 1956-01-26

Publications (1)

Publication Number Publication Date
GB809574A true GB809574A (en) 1959-02-25

Family

ID=20342792

Family Applications (1)

Application Number Title Priority Date Filing Date
GB183/57A Expired GB809574A (en) 1956-01-26 1957-01-02 Improvements in or relating to electrical signal light systems

Country Status (3)

Country Link
DE (1) DE1116582B (en)
FR (1) FR1164851A (en)
GB (1) GB809574A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277442A (en) * 1963-03-06 1966-10-04 Gen Motors Corp Signal brightness control

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2634339B1 (en) * 1988-07-13 1995-09-01 Guillot Francis SELF-REGULATED ROAD SIGNALING LANTERN
GB0220581D0 (en) 2002-09-04 2002-10-09 Novartis Ag Organic Compound

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1939436A (en) * 1929-01-10 1933-12-12 Westinghouse Electric & Mfg Co Traffic control system
FR736972A (en) * 1932-05-11 1932-12-05 Method and devices for automatically triggering the operation of lighting, signaling, advertising or other apparatus by an illuminated mobile
DE908161C (en) * 1951-09-21 1954-04-01 Deutsche Bundesbahn Automatic lighting control for traffic, airfield, track field and signal systems
FR1085343A (en) * 1952-10-22 1955-01-31 Fisher Pierce Company Photo-electric lighting control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277442A (en) * 1963-03-06 1966-10-04 Gen Motors Corp Signal brightness control

Also Published As

Publication number Publication date
DE1116582B (en) 1961-11-02
FR1164851A (en) 1958-10-15

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