US2489544A - Radio tuning means - Google Patents

Radio tuning means Download PDF

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Publication number
US2489544A
US2489544A US774868A US77486847A US2489544A US 2489544 A US2489544 A US 2489544A US 774868 A US774868 A US 774868A US 77486847 A US77486847 A US 77486847A US 2489544 A US2489544 A US 2489544A
Authority
US
United States
Prior art keywords
bar
cam
bars
locking means
assembly
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
US774868A
Other languages
English (en)
Inventor
Bertram A Schwarz
Howard M Stelzl
Manfred G Wright
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.)
Motors Liquidation Co
Original Assignee
General Motors 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
Priority to BE484330D priority Critical patent/BE484330A/xx
Application filed by General Motors Corp filed Critical General Motors Corp
Priority to US774868A priority patent/US2489544A/en
Priority to GB15751/48A priority patent/GB649360A/en
Priority to FR968894D priority patent/FR968894A/fr
Priority to CH277838D priority patent/CH277838A/fr
Application granted granted Critical
Publication of US2489544A publication Critical patent/US2489544A/en
Priority to DEG1999U priority patent/DE1650552U/de
Priority to DEG4238A priority patent/DE862921C/de
Priority to US400433A priority patent/US2800027A/en
Priority to FR67200D priority patent/FR67200E/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/06—Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control
    • H03J1/066—Constructional details regarding potentiometric setting of voltage or current variable reactances
    • 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

  • This invention relates .to'indexing means. and more particularly to adjustable indexing means of the general nature of those used for push button tuning of radio receiving apparatus. Many dierent mechanisms have been designed and used to bring a radio receiver into various points of resonance for the reception of a plurality of pre-set or adjusted stations. One form which has achieved considerable popularity has been the reciprocating rod or bei. push button type, which lends itself well to a ilat compact assembly and requires a minimum amount of space.
  • These reciprocating rods usually carry an adjustable cam which is pivoted thereto and which engages a mechanism to transmit motion to the tuning means.
  • This 'cam may be adjusted about this pivot and locked at different angular positions to index the tuning mechanism and bring in the station desired by the operator.
  • Various locking means have heretofore been provided, most of which require considerable manipulation before the cam unlocked, the set tuned to a new position, the cam brought to itsinnermost limit to move it to its new position and then re-locked in that position.
  • Figure 1 is a top plan view of an indexing tuning means embodying our invention.
  • Figure 2 is a longitudinal side view of one of 6 Claims. (Cl. 'i4-10.33)
  • Figure3 is a sectional view taken on the line l, I of Figure 2.
  • Figure 4 is a sectional view taken'on the line 4, 4 of Figure 3;
  • Figure 5 isa view similar to Figure 4, showing the parts in releasing position.
  • FIG. 1 a box frame 2
  • coil and core combination in which the core 'is made of very finely divided or comminuted pieces of iron, which core can be slid into or out of the coil to change the inductance thereof.
  • Coils l2, i4 and I6 are utilized in the present tuner for this purpose, coils l2 and IB varying the inductance in the radio frequency circuits, and I4 varying the inductance in the oscillator circuit.
  • the adjustable cores I8, which cooperate with the coils just mentioned, are secured to a movable transverse member 2li and as it moves back and forth within the frame, the cores are either inserted into or Withdrawn from the coils to change the inductance as desired.
  • The'ends of the transverse member 20 extend through guide slots (not shown) in the side frame members 4 and 6, which act as a track to keep thetransverse member in position.
  • Two vertical members 22 and 24 are provided on opposite sides of the frame. Member 24 is pivoted on pivot 26, mounted in said frame member 4, and threadedly adjusted so that axial pressure can be brought to bear on the part.
  • Member 22 is in like manner pivoted in the opposite frame member li, and in that case the pivot consists of a shaft 28, rigidly connected to the member 22, and extending through side member 6 in a bearing assembly 30.
  • This shaft 28 extends to a manually operable tuning mechanism, not
  • the cam is unlocked and the push button retracted to the left to the limit of its travel.
  • the set may now be tuned to a desiredl station by manual means (not shown),
  • each assembly is identical, only one will be described, and that is best shown in detail in Figures 2 and 3, and consists of the main bar 44, which extends through both the front and rear frame members and. can slide back and forth.
  • a second similar member 46 In longitudinal slidable relation to this member 44 is a second similar member 46, which is so secured thereto that it may slide longitudinally with respect to the first under certain conditions, and which extends further to the front and carries atits outer end a manually engageable push button 48.
  • This bar 46 is provided with a relatively long slot 50, through which passes one portion of a rivet 52, carried by the outer end of the bar 44, the rivet having under one enlarged head a spring washer 54, providing axial pressure on the rivet and tending to hold the two bars together.
  • the member 44 likewise carries approximately midway of its length an adjustable cam 56, which is pivoted to the bar through a lsimilar rivet 58, which also has a spring Washer 60 providing axial pressure therefor.
  • the adjustable cam is the adjustable member and in turning it about its axis, the engaging faces 62 and 64 may be set at diierent angular relationships so that when they engage the transverse rods 32, they will bring the mechanism to different positions, depending upon their angular settings.
  • a bowed spring member 14 is secured to the lower surface of the portion of the bar 66 to the rear of thecam, and tends to keep which positions the bars 32 in a given angular position about their pivots.
  • the voperator then presses inwardly on the button which rst carries the whole assembly to the right, as shown in these gures.
  • the surfaces B2 and 64 engage the bars 32, first rst engaged, and then the other, until the two seat against the diametrically opposite bars 32. This stops the cam from any further rotation or unit inward travel and with it, of course, any possible travel of the bar 44 or the locking bar 66, pivotally attached thereto.
  • Slide 46 is also limited in travel due to the steep rise 86 in member 66 operating in conjunction with spring T4.
  • the vbar 46 may now slide with respect to the bar 44 if additional force is exerted allowing strap 16 to move'over steep rise 86, and this causes the strap 16 to force the inward end of the bar 66 down to lock the cam in this position.
  • the bar assembly is locked to a new given cam position, which as a unit may be spring biased to'its outer position'with the push button in normal location, and thenceforth the cam will always turn the rocker assembly to this spot upon any future actuation of this button.
  • locking means to prevent this which consists of a small raised projection 82 on the side of the bar 44, which is adapted to fall into a mating opening 8f4 in the side of the bar 46, so that when these two come into alignment, they will be locked together by spring pressure unless they are pulled sideways to allow the projection 82 to come out of the associated opening 84.
  • length of the shaft of the rivet 52 being somewhat longer than the combined thicknesses of the two bars plus the spring washer 54, which may be flattened by the side force on the push button.
  • tuning means for a radio receiving set reciprocating slide bar assembly comprising two parallel slide bars, means for securing the two bars together to provide limited relative longitudinal motion, a cam pivotally mounted on one of the bars, locking means for the cam pivotally mounted on the same bar in juxtaposition to the cam to move in a plane at right angles to the face of the cam and when in contact therewith lock the same against movement around its pivot,
  • spring biasing means tending to force the locking means away from the cam
  • camming means carried by the other bar and engaging the locking means to force the locking means against the spring bias upon relative longitudinal movement of the two slide bars and additional locking means to maintain the two slide bars in that position when the cam is locked.
  • first reciprocating slide bar i first reciprocating slide bar.' manually engageable means mounted on the protruding end of said bar, a second reciprocating slide bar overlapping a portion of the first, means -to secure the two bars together but provide a limited amount of relative longitudinal movement, said securing means including deformable means to allow the bars to be moved laterally, one of said bars having an opening therein and a mating projection in the other bar adapted to enter the opening in" the ilrst to prevent relative longitudinal movement of the two bars unless one is pulled sideways to remove the projection from the opening.
  • a rst reciprocating slide bar manually engageable means mounted on the protruding end of said bar, a second reciprocating slide bar overlapping a portion of the rst, means to secure the two b ars together but provide a limited amount of relative longitudinal movement, said securing means including deformable means to allow.' the bars to be moved laterally, one of said bars having an opening therein, a mating projection in the other bar adapted to enter the opening in the ilrst to prevent relative longitudinal movement of the two bars unless one is pulled sideways to remove the projection from the opening, afcam pivotally mounted on the second bar, locking means pivoted to the second bar and engaging the cam to maintain the same in a desired position, said locking means having a portion thereof divergent from the second bar, spring means tending to bias the locking means away from the bar and means carried by the first bar engaging the divergent portion of the locking means to force the locking means in toward cam clamping position upon relative motion of the two bars
  • a first reciprocating slide bar cam means pivotally mounted thereon which can be set to different angular positions
  • locking means for the cam carried by the bar asecond slide bar secured to the iirst by means providing a limited amount of relative longitudinal motion and a small amount of transverse motion, means carried by the second bar to engage and move the locking means-a projection on one of said bars and a mating opening in the other bar at the full locking position so that the second' bar must be moved laterally far enough to disengage the projection from the opening before it can be slid longitudinally to unlock the cam.
  • control means having a movable member which it is desired to adjust to different positions
  • adjustable means on the assembly to engage and move the member, manually engageable means extending from the assembly for' locking the adjustable means and a.
  • second locking means actuatable by said same manuallyengageable means to maintain the first in locked position.
  • control means having a movable member which it is desired to adjustto different positions
  • a slidable assembly including two relatively movable slide bars, an adjustable cam to contact the movable member carried by one of the bars, locking means 4for the cam carried by the bar, means s carried by the other bar to contact and actuate the locking means upon relative longitudinal sliding movement and second locking means to prevent such relative longitudinal movement.

Landscapes

  • Structure Of Receivers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Mechanical Control Devices (AREA)
US774868A 1947-09-18 1947-09-18 Radio tuning means Expired - Lifetime US2489544A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
BE484330D BE484330A (is") 1947-09-18
US774868A US2489544A (en) 1947-09-18 1947-09-18 Radio tuning means
GB15751/48A GB649360A (en) 1947-09-18 1948-06-11 Improved radio tuner mechanism
FR968894D FR968894A (fr) 1947-09-18 1948-07-07 Mécanisme d'accord pour radio-récepteur
CH277838D CH277838A (fr) 1947-09-18 1948-09-17 Mécanisme d'accord de récepteur de radio à boutons-poussoirs.
DEG1999U DE1650552U (de) 1947-09-18 1950-10-02 Abstimmvorrichtung fuer funkgeraete.
DEG4238A DE862921C (de) 1947-09-18 1950-10-03 Abstimmvorrichtung fuer Funkgeraete
US400433A US2800027A (en) 1947-09-18 1953-12-28 Mechanical radio tuning means
FR67200D FR67200E (fr) 1947-09-18 1954-11-18 Mécanisme d'accord pour radio-récepteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US774868A US2489544A (en) 1947-09-18 1947-09-18 Radio tuning means

Publications (1)

Publication Number Publication Date
US2489544A true US2489544A (en) 1949-11-29

Family

ID=25102534

Family Applications (1)

Application Number Title Priority Date Filing Date
US774868A Expired - Lifetime US2489544A (en) 1947-09-18 1947-09-18 Radio tuning means

Country Status (6)

Country Link
US (1) US2489544A (is")
BE (1) BE484330A (is")
CH (1) CH277838A (is")
DE (2) DE1650552U (is")
FR (2) FR968894A (is")
GB (1) GB649360A (is")

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793531A (en) * 1955-05-25 1957-05-28 Motorola Inc Tuning apparatus
US2800027A (en) * 1947-09-18 1957-07-23 Gen Motors Corp Mechanical radio tuning means
US2898767A (en) * 1956-11-08 1959-08-11 Radio Condenser Co Tuner
US2928283A (en) * 1957-10-14 1960-03-15 Radio Condenser Co Tuner
US2930241A (en) * 1957-10-17 1960-03-29 Motorola Inc Pushbutton structure
US2977430A (en) * 1956-05-22 1961-03-28 Chrysler Corp Starter control device for automotive vehicles
US2989958A (en) * 1956-07-09 1961-06-27 Chrysler Corp Neutral push button transmission control and starter switch
US3074284A (en) * 1961-05-26 1963-01-22 Thompson Ramo Wooldridge Inc Push button slide assembly for tuners
US3086401A (en) * 1961-03-14 1963-04-23 Thompson Ramo Wooldridge Inc Tuner slide assembly
US3195359A (en) * 1961-12-21 1965-07-20 Motorola Inc Pushbutton structure
US4458545A (en) * 1981-01-12 1984-07-10 Clarion Co., Ltd. Guide shaft in a pushbutton tuner

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL288947A (is") * 1963-02-13
GB1054085A (is") * 1963-06-19
DE2829514C2 (de) * 1977-07-14 1986-03-27 RI-EL Ricerche Elettroniche S.p.A., Cologno Monzese, Mailand Drucktastenabstimmer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2259719A (en) * 1938-05-20 1941-10-21 Condenser Dev Corp Radio station selector
US2301090A (en) * 1941-04-09 1942-11-03 Radio Condenser Co Radio tuning mechanism
US2310003A (en) * 1941-01-06 1943-02-02 Wells Gardner & Co Tuning mechanism for radio receiving sets

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2259719A (en) * 1938-05-20 1941-10-21 Condenser Dev Corp Radio station selector
US2310003A (en) * 1941-01-06 1943-02-02 Wells Gardner & Co Tuning mechanism for radio receiving sets
US2301090A (en) * 1941-04-09 1942-11-03 Radio Condenser Co Radio tuning mechanism

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800027A (en) * 1947-09-18 1957-07-23 Gen Motors Corp Mechanical radio tuning means
US2793531A (en) * 1955-05-25 1957-05-28 Motorola Inc Tuning apparatus
US2977430A (en) * 1956-05-22 1961-03-28 Chrysler Corp Starter control device for automotive vehicles
US2989958A (en) * 1956-07-09 1961-06-27 Chrysler Corp Neutral push button transmission control and starter switch
US2898767A (en) * 1956-11-08 1959-08-11 Radio Condenser Co Tuner
US2928283A (en) * 1957-10-14 1960-03-15 Radio Condenser Co Tuner
US2930241A (en) * 1957-10-17 1960-03-29 Motorola Inc Pushbutton structure
US3086401A (en) * 1961-03-14 1963-04-23 Thompson Ramo Wooldridge Inc Tuner slide assembly
US3074284A (en) * 1961-05-26 1963-01-22 Thompson Ramo Wooldridge Inc Push button slide assembly for tuners
US3195359A (en) * 1961-12-21 1965-07-20 Motorola Inc Pushbutton structure
US4458545A (en) * 1981-01-12 1984-07-10 Clarion Co., Ltd. Guide shaft in a pushbutton tuner

Also Published As

Publication number Publication date
DE862921C (de) 1953-01-15
DE1650552U (de) 1953-02-12
BE484330A (is")
FR968894A (fr) 1950-12-08
CH277838A (fr) 1951-09-15
GB649360A (en) 1951-01-24
FR67200E (fr) 1957-11-25

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