GB521451A - Improvements relating to electric switch mechanisms suitable for controlling road traffic signals - Google Patents

Improvements relating to electric switch mechanisms suitable for controlling road traffic signals

Info

Publication number
GB521451A
GB521451A GB3341538A GB3341538A GB521451A GB 521451 A GB521451 A GB 521451A GB 3341538 A GB3341538 A GB 3341538A GB 3341538 A GB3341538 A GB 3341538A GB 521451 A GB521451 A GB 521451A
Authority
GB
United Kingdom
Prior art keywords
spindle
gate
projection
switch
projections
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
GB3341538A
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.)
ARTHUR LESTER MARKLEW
GOWSHALL Ltd
Original Assignee
ARTHUR LESTER MARKLEW
GOWSHALL 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 ARTHUR LESTER MARKLEW, GOWSHALL Ltd filed Critical ARTHUR LESTER MARKLEW
Priority to GB3341538A priority Critical patent/GB521451A/en
Publication of GB521451A publication Critical patent/GB521451A/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
    • G08G1/085—Controlling traffic signals using a free-running cyclic timer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D21/00—Machines or devices for shearing or cutting tubes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Traffic Control Systems (AREA)

Abstract

521,451. Snap-action switches; actuation of switches. GOWSHALL, Ltd., and MARKLEW, A. L. Nov. 17, 1938, No. 33415. [Class 38 (v)] In a switch specially suitable for controlling road traffic signals, a motor- or hand-driven spindle n is connected by a spring q to a switch spindle or sleeve j, the latter having projections p adapted to engage in turn one of two projections 12 on a gate 4 and hold the spindle j against movement until the spring q has been sufficiently strained when a projection 9 fixed on the spindle n engages a lever 10 and causes a movement of the gate 4 against the action of springs 8 thus releasing the projection p and allowing the spindle j to rotate until another projection p comes to rest against a second projection 12 on the gate. Further rotation of the spindle n causes the gate 4 to move back and release the projection p. The projections p when released pass through gaps 11 in the gate. The switch spindle j carries cams k operating switch arms. When the spindle n is hand operated a spring-pressed plunger engages a cam disc to determine the switch positions of the spindle n. The plunger may be withdrawn when the device is motor driven. The motor drives a ratchet wheel on the spindle n by reciprocating a pawl.
GB3341538A 1938-11-17 1938-11-17 Improvements relating to electric switch mechanisms suitable for controlling road traffic signals Expired GB521451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3341538A GB521451A (en) 1938-11-17 1938-11-17 Improvements relating to electric switch mechanisms suitable for controlling road traffic signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3341538A GB521451A (en) 1938-11-17 1938-11-17 Improvements relating to electric switch mechanisms suitable for controlling road traffic signals

Publications (1)

Publication Number Publication Date
GB521451A true GB521451A (en) 1940-05-22

Family

ID=10352655

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3341538A Expired GB521451A (en) 1938-11-17 1938-11-17 Improvements relating to electric switch mechanisms suitable for controlling road traffic signals

Country Status (1)

Country Link
GB (1) GB521451A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9177769B2 (en) 2006-09-26 2015-11-03 Owlstone Limited Interdigitated electrode configuration for ion filter
US10012614B2 (en) 2007-09-25 2018-07-03 Owlstone Medical Limited Interdigitated electrode configuration for ion filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9177769B2 (en) 2006-09-26 2015-11-03 Owlstone Limited Interdigitated electrode configuration for ion filter
US10012614B2 (en) 2007-09-25 2018-07-03 Owlstone Medical Limited Interdigitated electrode configuration for ion filter

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