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Publication numberUS3638179 A
Publication typeGrant
Publication dateJan 25, 1972
Filing dateApr 16, 1968
Priority dateApr 16, 1968
Publication numberUS 3638179 A, US 3638179A, US-A-3638179, US3638179 A, US3638179A
InventorsBraschwitz Harold J, Coll Edward T, Grace Charles, Hunter Stephen A, Manchester Michael J
Original AssigneeMartha H Egly
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Emergency vehicle control of traffic signals
US 3638179 A
Abstract
The present system provides a traffic light control system which enables an emergency vehicle such as a fire engine, ambulance or the like to control all traffic lights at each intersection through which it will pass in the course of its intended travel. The traffic lights can be rendered one green and three red at each said intersection along the route with the green light facing the oncoming emergency vehicle. In the alternative the system provides a means for rendering the traffic lights all red at each intersection thereby stopping the traffic in all directions and enabling the emergency vehicle to weave in and out of the stopped traffic.
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Description  (OCR text may contain errors)

United States Patent Coll et a1. [451 Jan.- 25, 1972 [54] EMERGENCY VEHICLE CONTROL ()F 3,1 14,13; 15/1923 Ramsey ..340/33 TRAFFI SIGNALS 3,2093 19 5 Mentzer et a ..340/33 C 3,247,482 4/1966 Lesher ..340/32 X [72] Inventors: Edward T. Coll, Philadelphia, Pa.; Hamid 3,257,641 6/1966 Campana et a1 ..340/33 J. Braschwitz, North Royalton; Charles Grace, Bracksville, both of Ohio; Michael Primary ExaminerWilliam C. Cooper J. Manchester, Philadelphia, Pa.; Stephen Anomey-Zachary T. Wobensmith," A. Hunter, Ill, Charlotte, NC. [73] Assignee: Martha H. Egly, Philadelphia,- Pa. [57] ABSTRACT The present system provides a traffic light control system [22] Filed 1968 which enables an emergency vehicle such as a fire engine, am- [21] Appl. No.: 721,668 bulance or the like to control all traffic lights at each intersection through which it will pass in the course of its intended travel. The traffic lights can be rendered one green and three [52] US. Cl. ..340/32 red at each said intersection along the route with the green [5 Cl 1/00 light facing the oncoming emergency vehicle. In the altema- [58] Field ofSearch ..340/3l-33 five the system provides a means for rendering the "at-fie lights all red at each intersection thereby stopping the traffic [56] Rderences Cned in all directions and enabling the emergency vehicle to weave UNITED STATES PATENTS in and out of the stopped traffic.

2,203,871 6/1940 Koch ..340 33 8 claims, 17 Drawing Figures 2,355,607 8/1944 Shepherd... ....340/33 2,903,674 9/1959 Schwab ..340/33 ALARM INPUTS FROM eusmselvzv RECEIVER EMERGENC Y og NORMAL AMBER LAMP i F i I CONTROLLER CONTROL MON/T02 EMERGENCY "A omr V o/vs (IECUIT W RED LAMP 1 0 ,uomrozs /021. 7 SECOND GREEN DELAY ACTUlT/ON 9' RESET S/03 TIME: E 0NTEOL J I EMERGENCY I08 )407 AMbEZ TIMER M09 ALARM MEMORY 4' 5/04, L kEsET ACTUA 7'02 ;I/I BEACON I I l i555 LAMP FLASI-IEE EMERGENCY MP 5/20 [MN/T025 CONDITION H5 ONTZUL zsu Y5 1 msrsz ,1/3 EMERGENCY EMERGENCY TRANSFER msrez 62EEN LAMP 422 SAFETY CIRCUIT TRANSFER CONTROL EME Y r/I8 (mussel/E2 EELAYs PATENTEU JAMES I972 SHEET 03 [1F 21 PATENTED m2 5:912

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Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2203871 *Oct 13, 1936Jun 11, 1940Rca CorpRadio traffic control
US2355607 *Mar 25, 1940Aug 15, 1944O'd Shepherd JudsonControl system
US2903674 *Aug 30, 1954Sep 8, 1959North American Aviation IncRemote emergency traffic control system
US3114127 *Mar 5, 1962Dec 10, 1963Electronic Traffic Control IncTraffic light controller
US3209325 *Apr 3, 1961Sep 28, 1965Electro Controls IncSystem for emergency remote control of traffic signals
US3247482 *May 26, 1961Apr 19, 1966Rad O Lite IncTraffic control systems
US3257641 *May 31, 1963Jun 21, 1966Chrys Camp Controller IncEmergency traffic control system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3824469 *Jun 16, 1972Jul 16, 1974M RistenbattComprehensive automatic vehicle communication, paging, and position location system
US3881169 *Jun 1, 1973Apr 29, 1975Traffic Control Products IncEmergency vehicle traffic controller
US4223295 *Oct 18, 1978Sep 16, 1980Nelson A. FaerberEmergency control system for traffic signals
US4352086 *May 1, 1980Sep 28, 1982Siemens AktiengesellschaftMethod and a circuit arrangement for modifying control information in a traffic signal system, particularly a street traffic signal system
US4463339 *Jul 1, 1981Jul 31, 1984Ralph E. FrickState/interval redundant controller system for traffic signals
US4704610 *Dec 16, 1985Nov 3, 1987Smith Michel REmergency vehicle warning and traffic control system
US4864297 *Oct 14, 1987Sep 5, 1989Tekedge Development Corp.Siren detector
US4914434 *Jun 13, 1988Apr 3, 1990Morgan Rodney KTraffic signal preemption system
US20100153002 *Jul 21, 2009Jun 17, 2010Electronics And Telecommunications Research InstituteRoute guidance system and method for emergency vehicle using telematics
EP0461960A1 *Jun 6, 1991Dec 18, 1991Automobiles PeugeotMotor vehicle traffic management system at crossroads
EP0797179A1 *Mar 21, 1997Sep 24, 1997Eric CadenheadImprovements in or relating to traffic control
Classifications
U.S. Classification340/906
International ClassificationG08G1/087, G08G1/07
Cooperative ClassificationG08G1/087
European ClassificationG08G1/087