GB335936A - Electrical system for communicating with moving vehicles - Google Patents

Electrical system for communicating with moving vehicles

Info

Publication number
GB335936A
GB335936A GB20387/29A GB2038729A GB335936A GB 335936 A GB335936 A GB 335936A GB 20387/29 A GB20387/29 A GB 20387/29A GB 2038729 A GB2038729 A GB 2038729A GB 335936 A GB335936 A GB 335936A
Authority
GB
United Kingdom
Prior art keywords
line
currents
demodulator
pass filter
shows
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
GB20387/29A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Priority to US266091A priority Critical patent/US1803453A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to GB20387/29A priority patent/GB335936A/en
Priority to FR680486D priority patent/FR680486A/en
Publication of GB335936A publication Critical patent/GB335936A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

335,936. Standard Telephones & Cables, Ltd., (Western Electric Co., Inc.). July 3, 1929. Inductive signalling. - In an inductive high frequency signalling system between a moving vehicle and a line L series inductances 1, 2 are provided to sectionalize the line as regards currents passing longitudinally over the line wires in parallel with earth return and means are provided to apply the longitudinal currents to the line as a metallic circuit, such as the translating device 3. The translating device may additionally include an amplifier, a filter and a demodulator to reduce the frequency. Fig. 3 shows a system in which the longitudinal currents after translation are applied to a second circuit so that different trains in different sections may be signalled. The demodulator 7 may be switched on by a train entering the section in conjunction with the automatic train control or the signal currents may be applied to rectifier 19, Fig. 5, and operate relay 10. Fig. 6 shows a modified arrangement of the line sectionalizing means by which reflection losses may be obviated comprising a low pass filter 12 bridged by a high pass filter 13, the mid point of the coils 14 of which is grounded through an impedance 16.
GB20387/29A 1928-03-30 1929-07-03 Electrical system for communicating with moving vehicles Expired GB335936A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US266091A US1803453A (en) 1928-03-30 1928-03-30 System for communicating with moving vehicles
GB20387/29A GB335936A (en) 1929-07-03 1929-07-03 Electrical system for communicating with moving vehicles
FR680486D FR680486A (en) 1929-07-03 1929-08-19 Electrical signaling system for establishing communications with mobile vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20387/29A GB335936A (en) 1929-07-03 1929-07-03 Electrical system for communicating with moving vehicles

Publications (1)

Publication Number Publication Date
GB335936A true GB335936A (en) 1930-10-03

Family

ID=10145107

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20387/29A Expired GB335936A (en) 1928-03-30 1929-07-03 Electrical system for communicating with moving vehicles

Country Status (3)

Country Link
US (1) US1803453A (en)
FR (1) FR680486A (en)
GB (1) GB335936A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510066A (en) * 1946-01-16 1950-06-06 Standard Telephones Cables Ltd Vehicle communication system
US2499180A (en) * 1946-06-25 1950-02-28 Union Switch & Signal Co Communication system
US2550957A (en) * 1946-09-26 1951-05-01 Union Switch & Signal Co Means for increasing the range of inductive train communication systems
US2550958A (en) * 1946-11-27 1951-05-01 Union Switch & Signal Co Line circuit repeater and transfer apparatus for communication systems
DE2901994C2 (en) * 1979-01-19 1981-01-29 Standard Elektrik Lorenz Ag, 7000 Stuttgart Device for linear influencing of track-bound vehicles

Also Published As

Publication number Publication date
US1803453A (en) 1931-05-05
FR680486A (en) 1930-05-01

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