CA1013448A - Control circuit having load and power source isolation usable for traffic light intensity control - Google Patents

Control circuit having load and power source isolation usable for traffic light intensity control

Info

Publication number
CA1013448A
CA1013448A CA177,930A CA177930A CA1013448A CA 1013448 A CA1013448 A CA 1013448A CA 177930 A CA177930 A CA 177930A CA 1013448 A CA1013448 A CA 1013448A
Authority
CA
Canada
Prior art keywords
load
power source
light intensity
traffic light
control circuit
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
CA177,930A
Other versions
CA177930S (en
Inventor
Peter A. Lind
William J.E. Anton
John E. Collins
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Application granted granted Critical
Publication of CA1013448A publication Critical patent/CA1013448A/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
CA177,930A 1972-09-15 1973-08-01 Control circuit having load and power source isolation usable for traffic light intensity control Expired CA1013448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00289444A US3800185A (en) 1972-09-15 1972-09-15 Control circuit having load and power source isolation

Publications (1)

Publication Number Publication Date
CA1013448A true CA1013448A (en) 1977-07-05

Family

ID=23111560

Family Applications (1)

Application Number Title Priority Date Filing Date
CA177,930A Expired CA1013448A (en) 1972-09-15 1973-08-01 Control circuit having load and power source isolation usable for traffic light intensity control

Country Status (4)

Country Link
US (1) US3800185A (en)
JP (1) JPS5226999B2 (en)
CA (1) CA1013448A (en)
GB (1) GB1432830A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384314A (en) * 1981-04-30 1983-05-17 Minnesota Mining And Manufacturing Company Control system for plural transformer relays
US4587457A (en) * 1982-02-19 1986-05-06 Minnesota Mining And Manufacturing Company Multiple intensity lamp controller and lighting system
JPH0676961A (en) * 1992-08-26 1994-03-18 Matsushita Electric Works Ltd Variable color lighting system
US10193322B2 (en) 2015-11-13 2019-01-29 Silicon Power Corporation Low-loss and fast acting solid-state breaker
US10193324B2 (en) 2015-11-13 2019-01-29 Silicon Power Corporation Low-loss and fast acting solid-state breaker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414878A (en) * 1965-12-17 1968-12-03 Gen Signal Corp Traffic signal lamp control circuit
US3483429A (en) * 1967-05-16 1969-12-09 Westinghouse Electric Corp Low cost,solid state photocontrol circuit
US3500455A (en) * 1968-07-05 1970-03-10 Minnesota Mining & Mfg Light responsive electrical lamp dimming means

Also Published As

Publication number Publication date
GB1432830A (en) 1976-04-22
JPS5226999B2 (en) 1977-07-18
JPS4968248A (en) 1974-07-02
US3800185A (en) 1974-03-26

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