GB853007A - Improvements in and relating to the control of traffic signals - Google Patents

Improvements in and relating to the control of traffic signals

Info

Publication number
GB853007A
GB853007A GB1761758A GB1761758A GB853007A GB 853007 A GB853007 A GB 853007A GB 1761758 A GB1761758 A GB 1761758A GB 1761758 A GB1761758 A GB 1761758A GB 853007 A GB853007 A GB 853007A
Authority
GB
United Kingdom
Prior art keywords
switches
traffic
motor
resistor
speed
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
GB1761758A
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.)
BARRIE QUILLIAM
FOREST CITY ELECTRIC Co L
Original Assignee
BARRIE QUILLIAM
FOREST CITY ELECTRIC Co L
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 BARRIE QUILLIAM, FOREST CITY ELECTRIC Co L filed Critical BARRIE QUILLIAM
Priority to GB1761758A priority Critical patent/GB853007A/en
Publication of GB853007A publication Critical patent/GB853007A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/08—Controlling traffic signals according to detected number or speed of vehicles

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

853,007. Road signals for controlling traffic. FOREST CITY ELECTRIC CO. Ltd., and QUILLIAM, B. June 1, 1959 [June 3, 1958], No. 17617/58. Class 118 (2). A traffic signal has a constantly rotating electric motor actuating a cam-shaft whose cams operate four switches which control the traffic lights and also the speed of the motor and cam-shaft, the speed regulating the period of time during which a respective traffic light is illuminated. In a portable traffic signal, a motor M drives a cam-shaft which operates four micro-switches X, Y, C, D, the cams being so cut that the switches remain in their operated condition for one quarter of a revolution of the cam-shaft. With the switches as shown (all unoperated) the signals at both ends of a road show red R A , R B , and the speed of rotation of the motor is controlled by resistor R 1 . During the next quadrant of rotation (interval 1) switches X, C are operated, giving a green signal at one end G A , and controlling the motor speed by resistor R 2 . For the third quadrant all switches are again unoperated, and for the fourth switches X, Y, D are operated giving a green signal G B at the other end, and connecting resistor R 4 in the motor circuit. Vehicleoperated switches P A , P B at either end of the road are also included in the circuit to operate relays E, F. If light G A is illuminated, traffic passing over pad P A will cause relay E to operate to change-over contacts e, substituting resistor R 3 for resistor R 2 , to decrease the speed of the motor, allowing a longer period of " green " during periods of high traffic density in one direction. Relay F and resistor R 5 similarly extend the period of " green " for traffic moving in the opposite direction. The pads may comprise flexible tubes closed at one end, and having diaphragms at the other end which operate switch contacts.
GB1761758A 1958-06-03 1958-06-03 Improvements in and relating to the control of traffic signals Expired GB853007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1761758A GB853007A (en) 1958-06-03 1958-06-03 Improvements in and relating to the control of traffic signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1761758A GB853007A (en) 1958-06-03 1958-06-03 Improvements in and relating to the control of traffic signals

Publications (1)

Publication Number Publication Date
GB853007A true GB853007A (en) 1960-11-02

Family

ID=10098277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1761758A Expired GB853007A (en) 1958-06-03 1958-06-03 Improvements in and relating to the control of traffic signals

Country Status (1)

Country Link
GB (1) GB853007A (en)

Similar Documents

Publication Publication Date Title
BR7400579D0 (en) MAGNETIC ACTUATOR CIRCUIT BREAKER
CA971611A (en) Selector switch actuator
CA988131A (en) Butt-contact speed control trigger switch
GB1268295A (en) Hall motor
CA966179A (en) Circuit breaker with improved auxiliary switch actuator
CA924358A (en) Armature structure for reed switches
GB853007A (en) Improvements in and relating to the control of traffic signals
CA1008157A (en) Control circuit for an electromechanical actuator
AU463964B2 (en) Selector switch mechanism and switch actuating mechanism therefor
CA957848A (en) Momentary switch control
JPS5248064A (en) Breaker operating mechanism control valve
CA994022A (en) Magnetically controlled reed relay crosspoint matrix switch
AU5285873A (en) Signal control circuit
JPS5589642A (en) Air conditioner
CA1028051A (en) Open switch bypass circuit
CA1012632A (en) Switching network control circuit
CA1009377A (en) Solid state control switch
CA1005881A (en) Solid state stack switch control system
CA1035855A (en) Preference lockout circuit for common control switching system
JPS566589A (en) Multifrequency signal sending circuit
JPS532013A (en) Cross point switch matrix circuit
CA900853A (en) Fluidic control circuit for operating gas blast circuit breaker
CA861037A (en) Resistor switch for air blast circuit breaker
JPS51142904A (en) Semiconductor crosspoint switch
AU486762B2 (en) Solid state control switch