US2335812A - Broadcast receiver apparatus for automatic press button tuning - Google Patents

Description

9 E. STEFFENS v 2,335,812

BROADCAST RECEIVER APPARATUS FOR AUTOMATIC PRESS BUTTON TUNING Filed Feb. 15, 1941 I IE ENTQR ATTORNEY} Patented Nov. 30, i943 UBROADCAST RECEIVER APPARATUS FOR AUTOMATIC PRESS BUTTON TUNING Eugen Stefiens, Berlin-Slemensstadt, Germany; vested in the Alien Property Custodian Application February 15, 1941, Serial No. 379,065 In Germany September 30, 1939 rod occupies its innermost position. In this position the push rod I is arrested and locked by the aid of an arrester deviceconsisting of a slide or latch barlll. By means of a spring 9 5 the latch bar 10 is pressed firmly against .the push rod I. For arresting or preventing the re- ;fljease of-the push rod it is fittedwith a catch l tons is rendered inoperative. In the convern- E0 l a singjthepush rod I, there is provided a tional type of keyboard, as will be remembered, p g '2 which iSQsO proportioned that'its rethe press-button stays immobile orlocked and is m {tractile forcejust 'suiiices to return the push rod allowed to return to its inoperative position only ,if and when'vliberated;by,the slide ID. The preswhen another press button is actuated. Thus, if 2 isure'l'otgthe slide l0 against the push rod l due 7 Claims.

Broadcast receiver sets with push-button or press-button (automatic) tuning are often furnished with a distinct release button or an equivalent device by the agency of which on changing from press-button tuning to normal tuningby means of a continuously revoluble knob control, the keyboard or the bank of press or push buta change is to be made from press-button tuning spring traction by the p n p QDO tion'ed' that by the pull .oilthe'sp'ring 12 the slide l'ic'an'ho't be movedlby thecatch I I. If, then, -tuationsjof the rotary knob l3 orvsome other Y .khob connected withtheitun'ing means of 'a transmission'gear; cable or the like lie-rotary:condensershaft 8 is moved, then, hrough the intermediary; of the tooth-Wheels 5a fij-also therocker 5 and therewith the rods hd liareturned'. 'By these rods 3-and 4 presur'ec-is brought toact upon thestriker .2 which ill be' exerted according to the direction of ropen the lower or the upper part of the he pressure which is exerted upon the iece 2 ,becomes added to the traction to the continuous tuningvby knob, it is.e ither necessary to operate-a distinct release button to which causes the depressed buttonto retum'to" its inactive position or else the' ,kyboa'rd for automatic tuning must be render'ed t by some other'ways and means, -,I=I -..v A

drawbacks "are obviated by thefinven'tio'n n broadcast receivers as here disclosed 'th' 'pre's button or key last set and operated is" released from its locked and depressed position in a simple; way by turning the rotary knob n gt q w y 3 suitthantgzthepush rod l is able to fly back into the tuning means and serving: for continuous tuning. When setting the rotary" condenser v-fbyj the aid of the tuning knob the arrestinglof-loeking of the press button bank"is' autogn'atially and positively'released or trippedigi'lo-this and for arresting the press buttonsf'a slid rester device may be provided:

Dress buttons are unlocked."

shown by way of example in the appendedzdra ing. Only one of the push buttons'of the whole bank normally provided is here shown in its entirety, an additional push-'button'being shown; partially. The press rod 1 which is'conneotedwith the button or key is fitted with a striker piece or actuator indicated at 2. When'the press or push rod I is depressed, the said striker i v p v V .50 continuously v variable tuning means, a menu piece 2 comes to bear against the rods 3 and 4 of the rocker 5. Thro'ughthe intermediary of the said rocker 5 and of the tooth-wheels 6 and l the rotary condenser shaft 8 or other shaft serving to move the tuning means is set. After the rocker 5 has been thus operated the push I an r e? trikeri z depres's-theislide Hlbythe catch H, with the reits starting position.

' w im claim is: p r I Q1; In tunable radio signalling apparatus adapted to be tuned by adjustment of a continuousl-y variable tuning means, a manually. con

-troll ed 'device capable loi only rotary motion' :for operating said tuningjmeans, a. push button tunlng' 'instrumentality-oi the-type wherein the demfthetiining meanstoa predetermined position;

eans'Jforf-holding an operated push button in a c neainscoupledwith said manuallyg controlled device-and actingonly upon Erotation thereof in "f. ei th rdirection,ior-i effecting."the release-ofany depressed-pushjbuttoh"oi said Iush nbutton tun:-

"powe' ,dffthe spring it. This pull will sufiice to p es sionlrof La -push ibutton mechanically adjusts c depressed position. until; released by the subse--' quent yoperationpt another; push button; and

push button in a depressed position and for releasing the push button upon the subsequent operation of another push button, and means coupled with said manually operable device and acting only upon rotation thereof in either direction for forcing the catch of any depressed push button out of engagement with said locking bar to thereby effect the release of such a push button.

3. In tunable radio signalling apparatus provided with a continuously variable tuning means, a manually operated tuning knob capable of only rotary motion coupled to said tuning means for positioning said variable tuning means, a push button tuning instrumentality operatively connected to said variable tuning means, said tuning instrumentality including a plurality of operable push button devices each thereof acting upon operation to effect the adjustment of said tuning means to a predetermined position, resilient means for biasing each of said push buttons toward their respective released positions, a looking bar, a catch on each of said push button devices cooperating with said locking bar for holdingan operated push button device in a depressed position against the action of said resilient means until the subsequent operationof another one of said push buttons, and means acting only upon the rotation of said tuning knob in either direction for forcing the catch of any depressed push butt-on device over the locking bar to thereby release the depressed push button whereby its associated resilient means returns the same to its released position.

4. In tunable radio receiver provided with a continuously variable tuning means, a manually operated tuning knob capableof only rotary motion coupled to said tuning means forpositioning said variable tuning means, a push button tuning instrumentality operatively connected to said variable tuning means, said tuning instrumentality including'a plurality of operable push button devices each acting upon operation to adjust said variable tuning means to a predetermined position, means for returning a depressed push button to its released position, a pivoted bail, means on each of said push buttons cooperating with said bail for latching an operated push button in a depressed position against the action of saidreturning means and in the process of the depression of its push button to act upon said bail to cause the same to release any previously operated push button, and means acting only upon operation of said tuning knob in either direction for unlatching said latching means of any depressed push button to thereby release the depressed push button.

5. In tunable-radio signalling apparatus provided with a continuously variable tuning means, a manually operated tuning knob capable of only rotary motion coupled to said tuning means for positioning said variable tuning means, a push button tuning instrumentality operatively connected to said variable tuning means, said tuning instrumentality including a plurality of operable push button devices each acting upon operation to adjust said variable tuning means to a predetermined position, means for applying a returning force to a depressed push button, a movable locking bar having a locking position and a releasing position, resilient means for biasing said bar toward its locking 5 position, means including a catch on each of said push buttons cooperating with said locking bar when the locking bar is in its locking position, for holding an operated push button in a depressed position against the action of its returning means and while the push button is being depressed, to move said bar temporarily to its releasing position to thereby effect the release of any previously operated push button device, and means acting only upon operation of said tuning knob in either direction for causing the catch means of a depressed push button to force said locking bar to its releasing position to thereby release the depressed push button. 1- 6. In a radio receiver provided with a variable 2 tuning reactor, 2. pivoted rocker bar, coupling means interposed between the rocker bar and the tuning reactor, push-button tuning mechanism including a plurality of reciprocable push-button devices each thereof acting upon operation to effect a predetermined adjustment of the rocker bar and coincidentally the tuning reactor, a spring for biasing each push-button device to its inoperative position, a spring-pressed locking bar, a catch on each of said push-button devices cooperating with said locking bar for holding an operated push-button device in a depressed position against the action of its spring until the subsequent operation of another one of said push-buttons, and a manual control member associated with the tuning reactor acting upon rotation thereof in either direction from the position of adjustment determined by a previously operated push-button for applying to the rocker bar through said coupling means suf- -ficient force which is additive to that of the biasing spring associated with the push-button device to overcome the force of the springpressed locking bar whereby the depressed pushbutton is released for return to its inoperative 45 position.

'7. In a radio receiver provided with a variable tuning reactor, a first means for adjustably setting said reactor comprising a pivoted rocker bar mechanically coupled to the tuning reactor,

a plurality of reciprocable push-button devices each thereof acting upon operation to effect a predetermined adjustment of the rocker bar and coincidentally the tuning reactor, a locking bar, a catch on each of said push-button devices cooperating with said locking bar for holding an operated push-button device in a depressed position until the subsequent operation of another one of said push-buttons, and a second means associated with the tuning reactor for adjusting said reactor independently of the first means, said second adjusting means acting upon rotation thereof in either direction for effecting release of a previously operated push-button by the locking bar through the intermediary of the pivoted rocker bar whereby the depressed pushbutton is released to enable it to return to its inoperative position.

'EUGEN STEFFENS.

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