US3257642A - Several-phase signalling installation for street crossing - Google Patents

Several-phase signalling installation for street crossing Download PDF

Info

Publication number
US3257642A
US3257642A US9473A US947360A US3257642A US 3257642 A US3257642 A US 3257642A US 9473 A US9473 A US 9473A US 947360 A US947360 A US 947360A US 3257642 A US3257642 A US 3257642A
Authority
US
United States
Prior art keywords
output terminals
signalling
impedance
contacts
winding
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 - Lifetime
Application number
US9473A
Other languages
English (en)
Inventor
Lazerges Paul Louis
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.)
Eclairage des Vehicules Sur Rail EVR SA
Original Assignee
Eclairage des Vehicules Sur Rail EVR SA
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 Eclairage des Vehicules Sur Rail EVR SA filed Critical Eclairage des Vehicules Sur Rail EVR SA
Application granted granted Critical
Publication of US3257642A publication Critical patent/US3257642A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • a signal-light installation provided for regulating the vehicle traffic in a two-way crossing or a multiple-way square comprises a number of groups of three lamps which provide a green, an amber and a red light, respectively. Each of these groups constitutes a so-called phase.
  • cam-shaft controlled switch means It has already been proposed to control several phases by means of a single installation utilizing a cam-shaft controlled switch means.
  • the number of phases may, however, be so large in certain cases that all phases cannot be controlled by a cam-shaft controlled switch means of the conventional design.
  • the cam-shaft controlled switch means does not always permit adjustment or varying of the control pattern as is necessary under varying conditions of trafiic.
  • An object of this invention is to provide a signalling installation which does not present any of the above mentioned draw backs. 1
  • FIG. 1 the parts of the installation which belong to a lamp and the parts which are common to the different lamps.
  • FIG. 2 a number of similar parts which belong to an installation.
  • P and N are a positive and a negative terminal of a source of direct current, respectively, I an intermediate point of the source, 1 a contact of a first plurality of input contacts, which are shown aligned along a vertical line, and 2 a contact of a second plurality of input contacts, which are also shown aligned along a vertical line.
  • 11 is similarly a wiper of another rotary switch 27, which is connected with the negative terminal N by a conductor 17 and can pass over each contact 2 successively. All these elements are common to the whole installation,
  • the numeral 3 represents one of a first plurality of output contacts shown aligned along a vertical line
  • 4 is one of a second plurality of output contacts, also shown aligned along a vertical line.
  • A is one of the conductors connecting a contact 1 with a corresponding contact 3
  • B is one of the conductors connecting a contact 2 with a corresponding contact 4.
  • V is a signalling lamp, for instance a green one.
  • the other elements 30 and 31 of FIG. 1 constitute a bistable saturable core switching unit individual to lamp V.
  • the element 30 includes a magnetic core 5 having oriented crystals and windings 6, 7, 8, and 9 which are wound around the core 5.
  • M is an alternating-current 3,257,642 Patented June 21, 1966 "ice source and 31 is a rectifying bridge which connects source M to the bias winding 7.
  • the winding 6 is connected by a conductor 12 with one of the output contacts 3, and the winding 8 is similarly connected by a conductor 13 with one of the output contacts 4.
  • the sense of winding 8 considered in the direction from I to 13 is the opposite of the sense of winding of 6 considered in the direction from 12 to I.
  • the magnetic core 5 is made of a known magnetic material having oriented crystals presenting a substantially rectangular hysteresis curve; as follows from the description hereinabove the magnetic core 5 is bistable, i.e., in absence of excitation it will maintain either a saturated condition in which the im pedance of winding 9 is negligible or an unsaturated condition in which this impedance is sufficient to maintain the lamp V in series therewith etfectively deenergized. Saturation of the core 5 is effected by energization of the winding 6 with a predetermined polarity as indicated in the drawings over wiper contact 10 and the appropriate connecting conductor A.
  • the saturated condition of the core 5 remains, even though winding 6 is deenergized, until winding 8 is subsequently energized with an appropriate polarity as indicated via wiper contact 11 and the appropriate connecting conductor B to render the core 5 unsaturated and the impedance of winding 9 sufficient to effectively block the current through lamp V.
  • the unsaturated condition of the core 5 will remain until the winding 6 is again energized.
  • lamp V is alternately lit and goes out when wipers 19 and 11 pass over the corresponding contacts 1 and 2 which control the windings 6 and 8, respectively, of the element 30 associated with the particular lamp V.
  • reference numeral 18 designates a socalled pulse sender which comprises voltage sources P and N, the conductors 16 and 17, the rotary switches 26 and 27 with the wipers 10 and 11 thereof, and the contacts 1 and 2 connected as has been indicated in FIG- URE 1.
  • the reference numerals 28 and 29 designate two parts of a distribution board comprising, respectively, the two series of terminals 3 and 4. These series of terminals 3 and 4 are selectively connected to series of contacts 1 and 2 of the rotary switches by corresponding conductors which are shown schematically in the figures, respectively, by the conductors A and B.
  • Reference numeral 24 designates a board on which there are disposed units 19, 22, and 23. These units are constituted by elements 30 and 31 of FIGURE 1 which have been defined as blocking circuits hereinabove.
  • Each of these units such as 19, 22, and 23 is connected, respectively, to a pair of terminals 3 and 4 by the series of conductors 12-13, 12a-13a, and 12b-13b.
  • the board 24 comprises any desired number of blocking circuits, such as 19, 22, and 23, three of these circuits only having been represented in order not to confuse the illustration of the invention.
  • Each blocking circuit such as 19, 22, and 23 is connected, respectively, to a pair of terminals disposed on a plate 25 by pairs of conductors shown at 21, 20a21a, and 20b21 b.
  • the pairs of terminals of the plate are connected to lamps G, Y, and R which corresponds to the green, yellow, and red lights of a phase.
  • a plural phase signalling installation for street intersections comprising a first set of input contacts, a second set of input contacts, switch means for successively and repeatedly energizing said first contacts individually from a power source, switch means for successively and repeatedly energizing said second input contacts individually from a power source, a first set of output terminals for said switch means, means for selectively interconnecting said first input contacts with said first output terminals, a second set of output terminals for said switch means, means for selectively interconnecting said second input contacts with said second output terminals, a plurality of signalling devices, and means for individually energizing each of said signalling devices from an alternating current source including for each signalling device a bistable impedance means having stable states of high and low impedance connected in series with said signalling device and said alternating current source for selectively presenting said high and low impedance to said signalling device in the respective stable states, each said bistable impedance means including control means connected to one of said first output terminals and responsive to energ
  • each bistable impedance means includes a saturable magnetic core having magnetically oriented crystals with a first winding thereon in series with said signalling de-, vice to provide said high and low impedance and wherein each of said control means includes a further winding on said core.
  • each of said first input contacts and said second input contacts are the fixed contacts of'a first and second rotary switch and the means for energizing said contacts include rotary wiper contacts of said respective rotary switches repeatedly movable over said input contacts.
  • a multi-phase signalling installation with a cyclic commutation, and more particularly, multi-phase signalling equipment for control of street intersections comprising first and second direct current sources of opposite polarity, potential and a reference potential, a pair of rotary switches, each having plural fixed contacts with output terminals and a movable wiper, said wipers be ing connected, respectively, to said first and second direct current sources of opposite polarity, a plurality of saturable magnetic cores having magnetically oriented crystals, each of these cores having at least four windings, two of these windings being coiled in the opposite direction with respect to each other and connected in series, the free terminals of these two windings being connected, respectively, to one of the output terminals of each of said rotary switches, a center point between these two first windings being connected to said common reference potential, a plurality of signalling devices, the third winding of each of said cores being connected in series with a signalling device to a source of alternating current, a rectif
  • a signalling installation in accordance with claim 6 characterized in that it is constituted by three panel units interconnected by electrical connections, the first panel unit comprising said sources of direct current, and said rotary switches, the second panel unit being constituted by a distribution board carrying terminals connected to the output terminals of the rotary switches, the third panel unit comprising said saturable magnetic cores with their windings and the rectifying bridge, the two first windings of each of said cores being connected, respectively, to the terminals of the second panel unit, the rectifying bridges corresponding to each of these elements being connected each to the terminals of a signalling device constituted by a colored electric lamp.
  • a multi-phase signalling installation with a cyclic commutation comprising a plurality of saturable magnetic cores having magnetically oriented crystals, first and second windings on each core being coiled in the opposite direction with respect to each other, control means for selectively pulsing said first and second windings on each of said cores in a sequential manner with direct current including a current source and a pair of rotary switches each having plural fixed contacts with output terminals and a movable wiper connected to said current course, said first and second windings on each core being connected, respectively, to one of the output terminals on each of said rotary switches, a plurality of signalling devices, a source of alternating current and a third winding of each of said cores being connected in series with a respective signalling device to said source of alternating current, a rectifying bridge connected in parallel with said signalling device and having its output terminals connected to said fourth winding, a first of said rotary switches being positionable to energize a first of said four windings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
US9473A 1959-02-26 1960-02-18 Several-phase signalling installation for street crossing Expired - Lifetime US3257642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR787778A FR1226653A (fr) 1959-02-26 1959-02-26 Installation de signalisation pour carrefour multiphase

Publications (1)

Publication Number Publication Date
US3257642A true US3257642A (en) 1966-06-21

Family

ID=8711737

Family Applications (1)

Application Number Title Priority Date Filing Date
US9473A Expired - Lifetime US3257642A (en) 1959-02-26 1960-02-18 Several-phase signalling installation for street crossing

Country Status (3)

Country Link
US (1) US3257642A (fr)
FR (1) FR1226653A (fr)
OA (1) OA01569A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544911A (en) * 1968-11-20 1970-12-01 Lfe Corp Phase shift cycle generator for a traffic control unit
US3614318A (en) * 1968-09-03 1971-10-19 Ibm Data transmission system
US4355295A (en) * 1980-11-13 1982-10-19 Gulf & Western Manufacturing Company Method and device for connecting terminals of a traffic control unit
US5088010A (en) * 1989-10-31 1992-02-11 Siemens Aktiengesellschaft Fastening means for a transformer module and a signal generator for mounting at a signal tower

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2021099A (en) * 1932-12-02 1935-11-12 Gerald Alan S Fitz Electric control system
US2129920A (en) * 1936-05-15 1938-09-13 Gerald Alan S Fitz Electric control system
US2178112A (en) * 1936-12-23 1939-10-31 Automatic Signal Corp Control apparatus
US2531153A (en) * 1949-12-29 1950-11-21 Gen Electric Traffic signal control system
US2722603A (en) * 1951-11-03 1955-11-01 Bell Telephone Labor Inc Peak voltage limiter
US2743405A (en) * 1955-03-17 1956-04-24 Westinghouse Electric Corp Variable voltage motor control
US2834001A (en) * 1956-03-23 1958-05-06 Eastern Ind Inc Traffic cycle selector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2021099A (en) * 1932-12-02 1935-11-12 Gerald Alan S Fitz Electric control system
US2129920A (en) * 1936-05-15 1938-09-13 Gerald Alan S Fitz Electric control system
US2178112A (en) * 1936-12-23 1939-10-31 Automatic Signal Corp Control apparatus
US2531153A (en) * 1949-12-29 1950-11-21 Gen Electric Traffic signal control system
US2722603A (en) * 1951-11-03 1955-11-01 Bell Telephone Labor Inc Peak voltage limiter
US2743405A (en) * 1955-03-17 1956-04-24 Westinghouse Electric Corp Variable voltage motor control
US2834001A (en) * 1956-03-23 1958-05-06 Eastern Ind Inc Traffic cycle selector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614318A (en) * 1968-09-03 1971-10-19 Ibm Data transmission system
US3544911A (en) * 1968-11-20 1970-12-01 Lfe Corp Phase shift cycle generator for a traffic control unit
US4355295A (en) * 1980-11-13 1982-10-19 Gulf & Western Manufacturing Company Method and device for connecting terminals of a traffic control unit
US5088010A (en) * 1989-10-31 1992-02-11 Siemens Aktiengesellschaft Fastening means for a transformer module and a signal generator for mounting at a signal tower

Also Published As

Publication number Publication date
FR1226653A (fr) 1960-07-15
OA01569A (fr) 1969-09-20

Similar Documents

Publication Publication Date Title
US3257642A (en) Several-phase signalling installation for street crossing
US3072883A (en) Traffic controllers employing static, logic control elements
US3794888A (en) Remote control switch circuit
AT258173B (de) Schaltungsanordnung für Verkehrssignalanlagen mit einer zentralen Steuervorrichtung und mehreren, von dieser beeinflußbaren Pufferschaltern
GB1271360A (en) Flux gate switches
US2853693A (en) Switching devices
US3359463A (en) Multi-pole reed switch relay
GB1000061A (en) Improvements in or relating to electrical control apparatus for energising and deenergising loads at predetermined times
US3134055A (en) Voltage level detector circuits
US2214253A (en) Traffic signaling system
US3291999A (en) Isolated multiple output circuit
US2506368A (en) Vehicole actuated traffic controller
GB1264769A (fr)
US3652865A (en) Electrical systems for road vehicles
US2249481A (en) Traffic signal controller
US2090655A (en) Traffic control system and apparatus
US1821205A (en) Electric motor control system
SU427446A1 (ru) Устройство автоматическогопереключения регулируемогопод нагрузкой трансформатораэлектростанцииi2
US3908131A (en) Control circuit having load and power source isolation
GB1197071A (en) Improvements in and relating to apparatus for Remote Control and Signalling
US3099752A (en) Matrix switch utilizing magnetic structures as crosspoints
US3134052A (en) Voltage level detector
SU1141033A1 (ru) Устройство дл управлени стрелками и сигналами
US3289197A (en) Character display system
US2199572A (en) Traffic signal