GB1041682A – Traffic light control system
– Google Patents
GB1041682A – Traffic light control system
– Google Patents
Traffic light control system
Info
Publication number
GB1041682A
GB1041682A
GB12003/65A
GB1200365A
GB1041682A
GB 1041682 A
GB1041682 A
GB 1041682A
GB 12003/65 A
GB12003/65 A
GB 12003/65A
GB 1200365 A
GB1200365 A
GB 1200365A
GB 1041682 A
GB1041682 A
GB 1041682A
Authority
GB
United Kingdom
Prior art keywords
counter
phase
central processor
clock pulses
register
Prior art date
1964-04-28
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
GB12003/65A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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.)
1964-04-28
Filing date
1965-03-22
Publication date
1966-09-07
1965-03-22
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1966-09-07
Publication of GB1041682A
publication
Critical
patent/GB1041682A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G08—SIGNALLING
G08G—TRAFFIC CONTROL SYSTEMS
G08G1/00—Traffic control systems for road vehicles
G08G1/07—Controlling traffic signals
G08G1/081—Plural intersections under common control
Abstract
1,041,682. Road signals for controlling traffic. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 22, 1965 [April 28, 1964], No. 12003/65. Heading G4Q. Traffic lights 11a-11c, Fig. 1 (not shown), at different junctions are advanced by respective stepper-switches 25a-25c which receive advance signals from buffer controllers 13a-13c which control the lengths of the phases in response to instructions received from a central processor 15. Each buffer controller, Fig. 2 (not shown), comprises three six-stage binary registers 31-33 which are set in accordance with the required phase lengths by signals from the central processor. At each phase the content of the respective register is fed to a counter 57 which is counted down from its setting by clock pulses, which may be supplied from the central processor. When the counter reaches zero an advance signal is sent to the stepper switch and the register for the next phase is connected to the counter. A three-stage ring circuit 65 determines which register is connected to the counter, and its three stages are connected to three AND gates 71 which are supplied with inputs from the respective traffic lights according to the actual phase of the lights. If the actual phase differs from the required phase a circuit 73 connected to gates 71 supplies no output, and this null output is inverted to supply an output which advances the traffic lights. The buffer controllers may be offset from each other by delaying the initial clock pulses supplied by the central processor. A counter 57<1> is set to the required offset and counted down by the clock pulses-when the counter reaches zero an AND gate 69 is opened to allow the clock pulses to pass to counter 57.
GB12003/65A
1964-04-28
1965-03-22
Traffic light control system
Expired
GB1041682A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US363147A
US3302170A
(en)
1964-04-28
1964-04-28
Traffic light control buffer
Publications (1)
Publication Number
Publication Date
GB1041682A
true
GB1041682A
(en)
1966-09-07
Family
ID=23429015
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB12003/65A
Expired
GB1041682A
(en)
1964-04-28
1965-03-22
Traffic light control system
Country Status (4)
Country
Link
US
(1)
US3302170A
(en)
AT
(1)
AT258173B
(en)
DE
(1)
DE1278298B
(en)
GB
(1)
GB1041682A
(en)
Families Citing this family (14)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3375494A
(en)
*
1963-09-11
1968-03-26
Siemens Ag
Control units for programmed operation of traffic signals
US3363185A
(en)
*
1965-05-04
1968-01-09
Sperry Rand Corp
Auxiliary reference signal generating means for controlling vehicular traffic flow or other moving elements
US3482208A
(en)
*
1966-02-21
1969-12-02
Gen Signal Corp
Traffic signal control system
US3434115A
(en)
*
1966-07-15
1969-03-18
Ibm
Timed operation sequence controller
US3579207A
(en)
*
1967-11-14
1971-05-18
Gulf & Western Industries
Load sequencer controller
CA933254A
(en)
*
1970-04-14
1973-09-04
Omron Tateisi Electronics Co.
Traffic signal control device
US3675196A
(en)
*
1971-01-25
1972-07-04
Computer Systems Eng Inc
Traffic signal control system
US3754210A
(en)
*
1971-03-30
1973-08-21
Fabrication D Instr De Mesure
Traffic light control systems
US3828307A
(en)
*
1971-06-29
1974-08-06
Georgia Tech Res Inst
Automatic traffic control system
JPS5225077B2
(en)
*
1972-03-16
1977-07-05
CH558966A
(en)
*
1972-06-15
1975-02-14
Siemens Ag
ROAD TRAFFIC SIGNAL SYSTEM.
USRE31044E
(en)
*
1977-10-19
1982-09-28
TRAC, Inc.
Traffic coordinator for arterial traffic system
US4167785A
(en)
*
1977-10-19
1979-09-11
Trac Incorporated
Traffic coordinator for arterial traffic system
US6331824B1
(en)
2000-08-10
2001-12-18
Paul A. Firestone
Traffic control signal with displayed time-elapse
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB824781A
(en)
*
1956-08-29
1959-12-02
Vickers Electrical Co Ltd
Improvements in or relating to automatic traffic signalling systems
USRE26150E
(en)
*
1958-07-03
1967-01-31
Traffic controllers khfi.oy i.ng static, logic control lllwlnts
1964
1964-04-28
US
US363147A
patent/US3302170A/en
not_active
Expired – Lifetime
1965
1965-03-22
GB
GB12003/65A
patent/GB1041682A/en
not_active
Expired
1965-04-09
AT
AT330665A
patent/AT258173B/en
active
1965-04-09
DE
DEJ27877A
patent/DE1278298B/en
not_active
Withdrawn
Also Published As
Publication number
Publication date
AT258173B
(en)
1967-11-10
DE1278298B
(en)
1968-09-19
US3302170A
(en)
1967-01-31
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None