GB207535A - Improvements in radio receiving systems - Google Patents

Improvements in radio receiving systems

Info

Publication number
GB207535A
GB207535A GB29414/23A GB2941423A GB207535A GB 207535 A GB207535 A GB 207535A GB 29414/23 A GB29414/23 A GB 29414/23A GB 2941423 A GB2941423 A GB 2941423A GB 207535 A GB207535 A GB 207535A
Authority
GB
United Kingdom
Prior art keywords
aerials
signals
couplers
signal
intensity
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
GB29414/23A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB207535A publication Critical patent/GB207535A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
    • B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
    • B61L3/125—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using short-range radio transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
    • B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/30—Time-delay networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Near-Field Transmission Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

207,535. British Thomson - Houston Co., Ltd., (Assignees of Rice, C. W.). Nov. 21, 1922, [Convention date]. Aerials; directive signalling; multiplex signalling.-A sharply-directive receiving- system comprises a number of antennµ arranged either endon or athwart the direction of the desired signals, and spaced apart from each other by a substantial fraction of the signal wave-length. Fig. 1 shows a series of three " wave aerials " 1, 2, 3 of the type described in Specification 173,315, arranged end-on to the incoming signals. Reflection transformers R1, R2, R3 transfer the cumulative effects to the rear end of the aerials, where output transformers T1, T2, T3 supply signalling and compensating currents to balanced transmission lines L1, M1 - - L3, M3, which feed through intensity-couplers 11, K1 - - 13, K3 the input circuits of coupling tubes 10, 11, 12. The output from these tubes is Fed through artificial lines PI, P2, P3 and intensity-couplers VI, V2, V3 to a combining tube 16 and thence to the receiver 18. In operation the necessary tune and phase adjustments are first made for optimum signals from each separate aerial by means of the sliders 19 - - 24, and similar adjustments are then made for the combined currents at the points 25, 26, 27 in the second series of artificial lines. For receiving multiplex signals, additional sliders 28 - - 33 are provided to obtain the necessary phase adjustments, and a separate set of coupling tubes, combining-tube and intensity-couplers is installed for each separate signal to be received. Fig. 8 shows two multiple tuned or " infinite velocity " aerials 37, 38 spaced apart broadside on to the incoming signal. Each aerial is bi-directional, but the combination results in a unidirectional receiver. The method is also described in connection with a series of ground antennµ spaced apart in the signal direction and also laterally thereof.
GB29414/23A 1922-11-21 1923-11-21 Improvements in radio receiving systems Expired GB207535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US602426A US1658740A (en) 1922-11-21 1922-11-21 Radio receiving system

Publications (1)

Publication Number Publication Date
GB207535A true GB207535A (en) 1924-04-03

Family

ID=24411302

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29414/23A Expired GB207535A (en) 1922-11-21 1923-11-21 Improvements in radio receiving systems

Country Status (3)

Country Link
US (1) US1658740A (en)
FR (1) FR30524E (en)
GB (1) GB207535A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725533A (en) * 1941-01-28 1955-11-29 Wilmer L Barrow Bridge circuit embodying artificial transmission lines
US2423085A (en) * 1943-03-05 1947-07-01 Standard Telephones Cables Ltd Delay device
BE479622A (en) * 1943-08-12
US4906006A (en) * 1989-04-28 1990-03-06 Phil Sigunick Practice golf device

Also Published As

Publication number Publication date
FR30524E (en) 1926-07-18
US1658740A (en) 1928-02-07

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