GB792878A - Improvements in or relating to switch mechanism for electrical tuning devices for wireless receiving apparatus - Google Patents

Improvements in or relating to switch mechanism for electrical tuning devices for wireless receiving apparatus

Info

Publication number
GB792878A
GB792878A GB3646255A GB3646255A GB792878A GB 792878 A GB792878 A GB 792878A GB 3646255 A GB3646255 A GB 3646255A GB 3646255 A GB3646255 A GB 3646255A GB 792878 A GB792878 A GB 792878A
Authority
GB
United Kingdom
Prior art keywords
spring
key
preh
lever
pivoted
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
GB3646255A
Inventor
Rudolf Hinkelmann
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.)
AGNES PREH
Original Assignee
AGNES PREH
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 AGNES PREH filed Critical AGNES PREH
Priority to GB3646255A priority Critical patent/GB792878A/en
Publication of GB792878A publication Critical patent/GB792878A/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

Landscapes

  • Auxiliary Devices For Music (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

792,878. Keyboard switches; snap-action switches. PREH, W., and PREH, A., [trading as PREH, ELEKTROFEINMECHANISCHE WERKE, J. PREH NACHF.]. Dec. 20, 1955, No. 36462/55. Class 38 (5). A switch assembly comprises a main switch and a number of wave-change switches (not shown) mounted side-by-side with their operating keys 7 pivoted on a common spindle 6. The main switch comprises a vertically-slidable contact carrier 4 connected to the key 7 by a spring 15 and engaged by a projection 11 of a lever 10 also pivoted at 6 and having an arm 12 co-operating with a part 13 of a pivoted. locking rail 14. The latter is spring-urged to hold the lever 10 in each end position. When the main key 7 is depressed, the spring 15 is strained until a cam 19 on the key raises the rail 14 to release the lever 10, so that the carrier 4 moves with a snap-action. When released, the key 7 is restored by a coil-spring 18, thereby re-straining the spring 15. Depression of any wave-change key then raises the rail 14 to release the lever 10 again, and the carrier 4 snaps in the opposite direction.
GB3646255A 1955-12-20 1955-12-20 Improvements in or relating to switch mechanism for electrical tuning devices for wireless receiving apparatus Expired GB792878A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3646255A GB792878A (en) 1955-12-20 1955-12-20 Improvements in or relating to switch mechanism for electrical tuning devices for wireless receiving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3646255A GB792878A (en) 1955-12-20 1955-12-20 Improvements in or relating to switch mechanism for electrical tuning devices for wireless receiving apparatus

Publications (1)

Publication Number Publication Date
GB792878A true GB792878A (en) 1958-04-02

Family

ID=10388366

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3646255A Expired GB792878A (en) 1955-12-20 1955-12-20 Improvements in or relating to switch mechanism for electrical tuning devices for wireless receiving apparatus

Country Status (1)

Country Link
GB (1) GB792878A (en)

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