GB989781A - Improvements in or relating to tuning arrangements for television receivers - Google Patents

Improvements in or relating to tuning arrangements for television receivers

Info

Publication number
GB989781A
GB989781A GB1445261A GB1445261A GB989781A GB 989781 A GB989781 A GB 989781A GB 1445261 A GB1445261 A GB 1445261A GB 1445261 A GB1445261 A GB 1445261A GB 989781 A GB989781 A GB 989781A
Authority
GB
United Kingdom
Prior art keywords
tuning
coils
band
rod
channels
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
GB1445261A
Inventor
Richard Geoffrey Kenwright
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB1445261A priority Critical patent/GB989781A/en
Publication of GB989781A publication Critical patent/GB989781A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/26—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection operated by hand
    • H03J5/32—Stationary tuning circuits or elements selected by push-button
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
    • H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole
    • H01F21/065—Measures for obtaining a desired relation between the position of the core and the inductance

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

989,781. Radio receiving apparatus. PLESSEY CO. Ltd. April 24, 1962 [April 21, 1961], No. 14452/61. Heading H3Q. [Also in Division H1] The aerial, radio-frequency and local-oscillalator tuning coils for a television receiver adapted to receive on one or more channels in both band I and band III are mounted upon a single common former, tuning of the coils being effected by the movement along the axis of the former of a plurality of aluminium slugs carried by an axially-disposed insulating rod. In the arrangement shown, the coils C, F, I, L are used for tuning the receiver to channels within band I and coils A, B, D, E, G, H, J, K for tuning to channels within band III. Tuning is effected by movement of a glass rod 2 carrying aluminium slugs 3, 4, 5, 6; in the full-line positions of the slugs tuning is within band I while in the broken-line positions tuning is within band III. Fig. 3 (not shown) illustrates a push-button mechanism in which an adjustable nylon nut screwed on to a threaded portion of the shaft extending from each pushbutton determines the extent of movement of rod 2 and hence the channel to which the receiver is tuned. A slide switch is associated with the rod 2 to switch over from one set of coils to the other as the tuning elements move between the two positions indicated in Fig. 2. A further push-button provides for frequencymodulation reception.
GB1445261A 1961-04-21 1961-04-21 Improvements in or relating to tuning arrangements for television receivers Expired GB989781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1445261A GB989781A (en) 1961-04-21 1961-04-21 Improvements in or relating to tuning arrangements for television receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1445261A GB989781A (en) 1961-04-21 1961-04-21 Improvements in or relating to tuning arrangements for television receivers

Publications (1)

Publication Number Publication Date
GB989781A true GB989781A (en) 1965-04-22

Family

ID=10041436

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1445261A Expired GB989781A (en) 1961-04-21 1961-04-21 Improvements in or relating to tuning arrangements for television receivers

Country Status (1)

Country Link
GB (1) GB989781A (en)

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