US2820366A - Tuning device for use in radio receivers having push-buttons - Google Patents

Tuning device for use in radio receivers having push-buttons Download PDF

Info

Publication number
US2820366A
US2820366A US515495A US51549555A US2820366A US 2820366 A US2820366 A US 2820366A US 515495 A US515495 A US 515495A US 51549555 A US51549555 A US 51549555A US 2820366 A US2820366 A US 2820366A
Authority
US
United States
Prior art keywords
shaft
disc
push
button
buttons
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 - Lifetime
Application number
US515495A
Other languages
English (en)
Inventor
Spakman Geert
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2820366A publication Critical patent/US2820366A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H03J5/02—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 variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/04—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 variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings operated by hand
    • H03J5/12—Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings

Definitions

  • rI he invention relates to a tuning device for use in radio receivers having push-buttons for the adjustment of predetermined positions of the tuning member by means of primarily semi-circular discs seated on the shafts of the push-buttons; each of these discs may be locked in any position relative to the shaft of the pushbutton by means of a clamping device and may be locked J'y pulling out the push-button.
  • each disc In the unlocked position each disc is freely rotatable and its position may be caused to correspond to the adjustment of the tuning member for the reception of a particular, desired station.
  • the button concerned this position may be fixed.
  • Such a device is known for example from British patent specification No. 649,360.
  • the invention has for its object to provide a simple and readily controllable device of the aforesaid kind.
  • a plate which is displaceable closely along the semi-circular disc is mechanically coupled with the part of the push-button which can be pulled out, a tag-shaped part of this plate being bent obliquely out of the plane of this plate in a manner such that upon pushing in the button the edge of the disc is clamped tight in a resilient manner between the slanting tag and an adjacent wall portion of the push-button shaft.
  • Fig. l is a horizontal view partly in section of the invention in the depressed position.
  • Fig. 2 is a plan view, partly in section, of Fig. l showing the normal depressed and extended positions.
  • Fig. 3 is a plan view, partly in section, of Fig. 1 showing the invention in the maximum extended position during tuning adjustment.
  • Fig. 4 is a plan view, partly in section, of Fig. 1 showing the invention in the mid position during tuning adjustment.
  • Figs. l and 2 are each an axial sectional view taken at right angles to one another, of a push-button 1 having a shaft 3, forming part of a radio reciever, the pushbutton being shown in the depressed position.
  • the shaft 3 Over part of its length the shaft 3 has a slot 5, which is bridged by a laterally introduced transverse stud 7, which operates as a shaft for a primarily semi-circular metal disc 9.
  • this disc is in contact at two points with a transmission member or swipe 11, which is journalled rotatably in the frame (not shown) of the radio receiver; the rotary shaft of the swipe 11 may coincide approximately with the centre line of the stud 7 in the position shown in Fig. 1.
  • the swipe may be coupled with a tuning member, for example with the cores of a plurality of moving-core coils 15. Owing to the contact at two areas the swipe 11 occupies a position which is determined by the position of the disc 9, so that in a conventional manner the tuning of the coils 15 to a particular desired station is obtained.
  • the position of the disc 9 relative to the shaft of the push-button must, of course, be xed, i. e. the disc must not be rotatable about the stud 7 or be rotatable about it only with difficulty.
  • the locking In order to permit an adjustment of the position of the disc 9, the locking must be detachable. This may be carried out by a displacement of the disc 9 relative to the shaft 3 in the direction of the centre line thereof.
  • the front part (shown on the right-hand side of the figures) of the shaft 3 is tubular and comprises a fitting ⁇ auxiliary shaft 21, t-o one end of which the push-button is secured. The other end is coupled mechanically with the aid of a stud 23 with the plate 17.
  • the push-button 1 If the push-button 1 is released, it returns into the rest position under the action of a pressure spring 25 (this position is designated by 1' in Fig. 2 and shown in broken lines); then a lug 27 seated on the shaft engages ⁇ the front plate 29 of the receiver. While the shaft 3 remains in its place, the auxiliary shaft 21 and the plate 17 may be drawn to the right by means of the button 1 until the position shown in Fig. 3 is reached, the disc 9 then being no longer locked and being freely rotatable about the stud 7.
  • the push-button 1 is depressed.
  • a screw spring 31 provided about the auxiliary shaft--which spring is stronger than the spring ZS-ensures that in this case the shaft 3 follows the movement of the button 1 against the force of the spring 25 and the friction of the shaft 3 in its bearing (see Fig. 4).
  • the disc 9 occupies the desired position. If the button 1 is further depressed, in this case against the force of the spring 31, the conditions shown in Figs. 1 and 2, in which the disc 9 is locked, are re-established.
  • the shaft 3 has preferably a circular sectional area; with this shape of the shaft and of the apertures in the frame of the receiver (for example in the plate 29), in which apertures the shaft is guided, the comparatively severe requirements for accuracy may be fulfilled Without great expense.
  • the push-button 1 is provided with an axial prolongation 33, which is adapted to slide in a fitting recess of the front plate 29.
  • the slot 5 which may be provided in the shaft 3 by a cheap milling operation, the disc and the plate 17 are rigidly supported and protected from the comparatively great lateral forces occurring during the locking operation.
  • the plate 17 should move accurately in the direction to the stud 7, when the disc 9 is locked, since otherwise a small turn of the disc 9 may be produced.
  • the plate 17 has a guide slot 35, extending in the direction of displacement, this slot 35 comprising the stud 7 and having a width which corresponds to-i. e. slightly exceeds-the diameter of the stud.
  • a layer having a rough surface for example a layer of emery paper may be applied to the disc 9 and/or to the adjacent wall portion of the shaft 3.
  • said clamping device including a displaceable plate element ,having a. struck-outzportion whereby when said pushbutton isdepressed a portion of saiddiscis clamped between said struckoutportion Iand the adjacent 1 portion of the pushbutton shaft, and when said :pushkbuttonis kpulled outsaidclamping deviceis unlocked.
  • a tuning device as set forth in claim 2 further comprising a slot in said displaceable plate element, a stud in said slot of said pushfbutton shaft and extending transversely to the axis thereof, said stud also extending nthrough said-s1ot in the displaceable plateielement to serve as a guide for the latter.

Landscapes

  • Structure Of Receivers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
US515495A 1954-06-15 1955-06-14 Tuning device for use in radio receivers having push-buttons Expired - Lifetime US2820366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL778981X 1954-06-15

Publications (1)

Publication Number Publication Date
US2820366A true US2820366A (en) 1958-01-21

Family

ID=19830057

Family Applications (1)

Application Number Title Priority Date Filing Date
US515495A Expired - Lifetime US2820366A (en) 1954-06-15 1955-06-14 Tuning device for use in radio receivers having push-buttons

Country Status (5)

Country Link
US (1) US2820366A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE538956A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1134427A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB778981A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (2) NL88266C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928283A (en) * 1957-10-14 1960-03-15 Radio Condenser Co Tuner
US3357265A (en) * 1966-01-18 1967-12-12 Trw Inc Actuating device
US3508176A (en) * 1967-02-18 1970-04-21 Wolfgang Labude Push-button channel selecting units for multiband receivers having capacitance diode tuning means

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503006A (en) * 1945-04-24 1950-04-04 Edward A Stalker Gas turbine engine with controllable auxiliary jet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503006A (en) * 1945-04-24 1950-04-04 Edward A Stalker Gas turbine engine with controllable auxiliary jet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928283A (en) * 1957-10-14 1960-03-15 Radio Condenser Co Tuner
US3357265A (en) * 1966-01-18 1967-12-12 Trw Inc Actuating device
US3508176A (en) * 1967-02-18 1970-04-21 Wolfgang Labude Push-button channel selecting units for multiband receivers having capacitance diode tuning means

Also Published As

Publication number Publication date
GB778981A (en) 1957-07-17
BE538956A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL188405B (nl)
NL88266C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR1134427A (fr) 1957-04-11

Similar Documents

Publication Publication Date Title
DE2538552C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
US3602051A (en) Pushbutton tuning mechanism
DE2538552B2 (de) Kombinationsgeraet mit einem tonbandund einem rundfunkempfangsteil
US2820366A (en) Tuning device for use in radio receivers having push-buttons
US4041422A (en) Fine tuning assembly for preset tuner
US2301090A (en) Radio tuning mechanism
US3403564A (en) Pushbutton apparatus for radios and the like
US3233470A (en) Decoupling apparatus for a push-button tuner
US3065642A (en) Fine tuning attachment
US2161183A (en) Preselector
US4079631A (en) 5-10 Pushbutton tuner
US2503121A (en) Tuning and push button control
US3724280A (en) Manual tuning apparatus for radio receiver
US2957356A (en) Fine tuning attachment for index type of tuner
US2853882A (en) Fine-tuning mechanism
US3308382A (en) Tuning control system for radio receivers
USRE27179E (en) Tuner actuating mechanism
US3298350A (en) Dial pointer assembly
US4161707A (en) Pushbutton tuner having linkage operated tuning slider
US3995242A (en) Tuning device for switching a plurality of broadcast bands and for selecting any of them
US2237487A (en) Adjustable tuning mechanism
US3172062A (en) Tuner having cam-driven vernier and having snap-spring detenting means for bypassingthe cam's return profile
US3648526A (en) Pushbutton selector structure
US3550459A (en) Pushbutton tuner
US3276274A (en) Switch