FR696220A - Improvements to traffic control devices - Google Patents

Improvements to traffic control devices

Info

Publication number
FR696220A
FR696220A FR696220DA FR696220A FR 696220 A FR696220 A FR 696220A FR 696220D A FR696220D A FR 696220DA FR 696220 A FR696220 A FR 696220A
Authority
FR
France
Prior art keywords
control devices
traffic control
traffic
devices
control
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
Other languages
French (fr)
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 SIGNAL CORP
Original Assignee
AUTOMATIC SIGNAL CORP
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 SIGNAL CORP filed Critical AUTOMATIC SIGNAL CORP
Application granted granted Critical
Publication of FR696220A publication Critical patent/FR696220A/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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
FR696220D 1930-04-23 1930-05-28 Improvements to traffic control devices Expired FR696220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US446462A US2188348A (en) 1930-04-23 1930-04-23 Traffic control system

Publications (1)

Publication Number Publication Date
FR696220A true FR696220A (en) 1930-12-27

Family

ID=23772672

Family Applications (1)

Application Number Title Priority Date Filing Date
FR696220D Expired FR696220A (en) 1930-04-23 1930-05-28 Improvements to traffic control devices

Country Status (4)

Country Link
US (1) US2188348A (en)
DE (1) DE567974C (en)
FR (1) FR696220A (en)
GB (1) GB351703A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056107A (en) * 1958-06-20 1962-09-25 Lab For Electronics Inc Traffic actuated control apparatus
US3146421A (en) * 1960-08-04 1964-08-25 Crouse Hinds Co Traffic signal controller

Also Published As

Publication number Publication date
US2188348A (en) 1940-01-30
GB351703A (en) 1931-07-02
DE567974C (en) 1933-01-12

Similar Documents

Publication Publication Date Title
FR713802A (en) Improvements made to thermostatic switches
FR727451A (en) Improvements to filtration devices
FR715101A (en) Improvements to ventilation devices
FR696220A (en) Improvements to traffic control devices
FR725012A (en) Improvements to distributors
FR690277A (en) Improvements to faucets
FR717143A (en) Improvements to thermal switches
FR695970A (en) Improvements to automatic traffic control devices
FR706783A (en) Improvements to ventilation devices
FR710778A (en) Improvements to flow regulating devices
FR716710A (en) Improvements to levels
FR688320A (en) Improvements to evaporators
FR716844A (en) Improvements to beams
FR694634A (en) Improvements to electric selectors
FR688070A (en) Improvements to gavanoplasty devices
FR724497A (en) Improvements to indicating devices
FR688215A (en) Improvements to filing devices
FR696752A (en) Improvements to thermostatic devices
FR39408E (en) Improvements to projection devices
FR711571A (en) Improvements to projection devices
FR707832A (en) Improvements to refrigeration devices
FR694775A (en) Improvements to lifting devices
FR705794A (en) Improvements to tapping devices
FR721167A (en) Improvements to hydraulic braking devices
FR725990A (en) Improvements to ventilation devices