US2294576A - Recording phongraph - Google Patents

Description

S pt- 1, 1942- E. v. SCHNEIDER 2 ,294,576

RECORDING PHONOGRAPH I 5 Sheets-Sheet 1 Filed Aug. 13, 1941 Sept. 1, 1942. E. v. SCHNEIDER RECORDING PHONOGRAPE Filed Aug. 13, 19 13 3 Sheets-Sheet 2 ilmaf VJZ/meidar Sept. 1, 1942. 'E. v. SCHNEIDER I RECORDING PHONOGRAPH Filed Aug. 13, 1941 3 Sheets-Sheet '3 4 3W- lllmor 1 JZ/meider v of arms fixed thereto and provided Patented Sept. 1, 1942 UNITED STATE nuoonmno PBONOGRAPH Emmor V. Schneider, Alliance, Ohio, assignor Alliance Manufacturing Company, Allian to ce,

Ohio, a corporation of Ohio Application August is, 1941, Serial No. 406,622

11 Claims.

The invention relates to phonographs, and more particularlyto mechanism for mounting the reproducer in the pick up arm of a phonograph adapted for recording or cutting records.

The recent revival oi interest in radio phonograph combination units has created a considerable demand for a phonograph for home use; adapted for making records as well as playing the records-so made at home and the usual commercial records.

The object of the present improvement is to provide a phonograph of this general character low priced electric operated having a hollow pick up arm in which the reproducer is pivotally mounted and provided with spring means for adjusting the tension upon the reproducer.

Another object is to provide a phonograph having a pick up arm of the character mentioned in which the spring tension adjusting means holds the reproducer assembled within the pick up arm.

Still another object is toprovide a device of this character in which the reproducer has a pair with V-shaped tangs stamped therefrom and adapted to pivot within V-shapedopenings in a supporting bracket carried by the pick up arm.

Astill further object of the invention is to provide such a device in which a tension spring is connected to the outer ends of the arms and to a stationary member carried by the pick up arm for holding the V-shaped tangs in pivotal contact with the V-shaped openings oflthe supporting bracket. I A still further object is to provide such a device in which an adjusting screw carried by the pick up arm adjustably supports the tension spring for adjusting the'tension upon the needle "carried by the reproducer.

Another object issthe provision of a device of I this character in which spring arms are connectedto the reproducer and provided with the V- shaped tangs for pivoting the same within the pick up arm.

" The above objects together with others which -will be apparent from the drawings and following description, or which may be later referred to, may be attained by constructing the improved pick up arm in the manner illustrated in the accompanying drawings in which Fig. 1 showing the tension adjustment set to give the greatest tension upon the needle;.

Fig. 3, a similar view showing set to give the least tension.

Fig. 4, a bottom plan view of pick up arm;

Fig. 5, a section taken as on the line 5-5, Fig. 4; and

Fig. 6, a detached perspective view of the reproducer and the arms by means of which the reproducer is pivoted within the pick up arm.

- Similar numerals refer to similar throughout the several views.

The platform of a phonograph cabinet is indicated generally at It and provided with the spindle ll upon which the turntable I2 is rotatably mounted in usual and well-known manner and adapted to .supportthe record l3 to be played back as the case may be.

As in usual practice the turntable l2 may be rotated in the proper direction as indicated by the arrow in Fig. 1, and at the desiredspeed by any suitable and well-known drive mechanism parts which it is not thought necessary to illustrate,

metal of hollow construction'as shown provided with the depending side walls i9 and forwardand rear end walls 20 and 2| respectively, and has a pair of headed studs 22 fixed to the inner side of the side walls l9 and-received in the notches 23 in the rear ends of the upright flanges l1 of-the channel bracket It so that the pick up arm may be pivoted thereon and adapted to be raised or lowered to the inoperative or operati-ve positions respectively,- as desired. 1

The pick up arm is held in pivotal relation upon the bracket by means of the coil spring 24 hav-- ing one end connected to the upper rear comer of the pickup arm as indicated at 25 and the other end connected to the ear 26 at the forward end portion of the bracket I6.

' Figure 1 is a top plan view of a phonograph I provided with the improved pick 'up arm; i Fig. 2, a vertical longitudinal section through the improved pick up arm taken on the For the purpose or limiting the downward movement or the pick up arm an adjustable stop screw 2] is threaded within the hollow boss 28 fixed within-the pick up arm, the lower end of I the screw being arranged to contact the rear-- line 2-2, end portion of the bracket i6.

the adjustment the improved cut or is mounted upon the plate I 3! within the hollow pick up arm.

This reproducer may be of any usual or desirable construction and design and is adapted to receive the usual needle 32, a cutting needle being shown in the drawings, the needle being held in position as by the usual stop screw 33 adapted to 'be received through the vertical slot 34 in the forward end wall of the pick up arm.

For the purpose of mounting the reproducer within the pick up arm a pair of sheet metal arms 35, preferably of spring material, are attached at their forward ends to the rear end portion of the reproducer as by the rivets 36 or their equivalents. The rear ends oat these arms may be connected together as by the pin 31 and each arm is provided intermediate of its ends with an outwardly stamped triangular or V-shaped tang 38, the apex thereof being received in the apex of a V- shaped opening 33 of a wider angle formed in the corresponding leg 40 of an inverted U-shaped bracket 4| fixed within the hollow pick up arm. In order to hold the reproducer and arms 35 assembled within the pick up arm and to provide for adjusting the position of the reproducer so as to regulate tension of the needle 32 upon the record l3 an adjusting screw 42 and tension spring 43 are provided.

The screw 42 has an unthreaded portion 46 swiveled within the bearing 45 fixedly mounted through the top of the pick up arm, washers or gaskets 46 and 4! being located around the unthreaded shank of the screw in the upper and lower ends of said bearing, the lower washer being held against end movement on the screw as by the cotter pin 48.

' The adjusting screw is thus rotatably mounted within the bearing 45 and held against end movement relative thereto.

One endof the spring 43 is hooked around the pin 31 as indicated at 43 and the other end thereof is provided with a hook 50 engaged in the threads of the screw 44 whereby rotation of the screw by means of the knurled head thereon will cause the hook 50 of the spring to ride in the threads of the screw to a point above or below the pivotal center of the tangs 33 in the V-grooves 39,. as indicated in Figs. 2 and 3, respectively, causing the forward end of the reproducer to move downward or upward, respectively, thus, increasing or decreasing the tension thereon.

In order to prevent any vibrations of the screw 43 from being picked up by the reproducer when the phonograph is being operated, particularly in the cutting or recording of a record, the spring may be damped as by the core of felt 52 located therethrough.

It should be understood that the adjustable stop screw 21 may be operated to limit the downward movement of the pick up arm l3 upon its pivots 22 in order to conIorm to the adjustment oi the tension by means oi the adjusting screw 42 so that the desired tension may be placed upon v the cutting needle 32 in order that the record may be cut to the desired depth.

Although Figures 2 and 3 show extremes 01 adiustment in both directions it should be understood that the reproducer may be moved from a point above to a point below center or vice versa by only a fractional turn of the adjusting screw It should also be understood that although the pick up arm and reproducer illustrated are provided 'with a cutting or recording needle 32 the invention is equally applicable to a pick up arm and reproducer designed for playing back or re produclng out records or to a combination arm and reproducer designed for both recording and reproducing oi records without in any way changing the construction or operation of the mechanism illustrated and described for producing the adjustmentabove set forth.

I claim:

1. In a phonograph including a turntable, a hollow pick up anm, means pivotally mounting one end 0! the pick up arm adjacent to the turntable, and a reproducer located within the other end of the hollow pick up arm, a pivot mounting for adjustably mounting the reproducer within the pick up arm, said pivot mounting including a pair of arms rigidly attached to the reproducer, V-shape tangs upon said arms. and the pick up arm having V -shape .notches of greater width than said tan-gs, the apices of the V-shape tangs being pivotally mounted in the apices of said V- shape notches.

2. In a phonograph including a turntable, a hollow pick up arm, means pivotally mounting one end of the pick up arm adjacent to the turntable, and a reproducer located within the other end 0'! the hollow pick up arm, a pivot mounting for adjustably mounting the reproducer within the pick up arm, said pivot mounting including a pair of spring arms rigidly attached to the reproducer, V-shape tangs upon said arms, and

the pick up am having V-shape notches of greater width than said tangs, the apices of the V-shape tangs being pivotally mounted in the apices of said V-shape notches.

3. In a phonograph including a turntable, a hollow pick up arm, means pivotally mounting one end or the pick up arm adjacent to the turntable, anda reproducer located within the other end of the hollow pick up arm, a pivot mounting for adjustably mounting the reproducer within the pick up arm, said pivot mounting including a pair of arms rigidly attached to the reproducer, V-shape tangs upon said arms, and the pick up arm having V-shape notches of greater width than said tangs, the apices of the V-shape tangs being pivotally mounted in the apices of said v-shape notches, and spring means for holding said arms, and the pick up-arm having V-shape notches of greater width than said tangs, the apices of the v -shape tangs being pivotally mounted in the apices of said V-shaped notches, and spring means for holding the tangs in the notches.

5. In a phonograph including a turntable, a hollow pick up arm, means pivotally mounting one end of the pick up arm adjacent to the 'ducer within the pick up arm,

ing screw in the hollow pick up arm,

' table, and a reproducer p p to the outer ends of said arms and having a -of greater width than apices, of the, v-shape mounted inthe an adjusting screwlocated endn springconnected ing screw, and means limiting the downward I x t turntable, and a reproducer located within the other end of the hollow pick up arm, a pivot mounting for adjustably mounting the reprosaid pivot mounting including a pair. of arms rigidly attached to the reproducer, V-shape tangs upon said arms, and the pick up arm having V-shape notches of greater width than said tangs, the apices of the \I-shape tangs being pivotally mounted in the apices of said V -shaped notches, an adjustpick up arm, and a spring connected atone end to the outer ends of said arms and having a hook at its-other end engaged in the threads of the adjusting screw.

6. In a phonograph including a turntable, a means pivotally mounting one end of the-pick up arm adjacent to the tumend of the hollow pick up arm,

the pick up arm, said pivot mounting including a pair of arms rigidly attached to. the repro-. ducer, V-shape tangs upon said arms, and the pick up arm having V-shape notches of greater width than said tangs, the apices of the v-shape tangs being pivotallymounted in the apices of said V-shape notches; anadjusting screw in the and a spring connected at one end hook at its otherend engaged in the threads of the adjusting screw, and. means limiting the downward movement of the pick up arm.

"I. In a phonograph including a' turntable, a hollow pick up arm,,means pivotally mounting .one end of the pick up arm adjacent to the turntable, and a reproducer located within the other end of the hollow pick up arm, a pivot mounting for adjustably mountingthe reproduc or within the pick up arm, saidpifot mounting including a pair of arms rigidly attached to the reproducer, V-shape tangs. upon said arms, an inverted, U-shape bracket mounted within the whollowpick up arm and havingv v-shape notches the'tangs, the apices of the V-shape tangs being pivotally mounted in the apices of said V-shape notches, an adjusting Jscrew located through the bracket, and a spring the outer ends of said connected at one end to arms and having a hook at its other end engazed in the-threads of the a'djustlng screw. 8. In a phonograph including a turntable, at hollow'pick' up arm, means pivotally mounting one end of turntable, and a reproducer located within the other end of the hollow pick up arm, pivot mounting for adjustably mounting the "repro-.

' ducer within thepick up arm, said pivot mountins includinga pair of arms rigidly attached'to the reproducer, V-shapetangs upon said arms, an inverted, U-s hape-bracket 'n'i'ounted within the hollow pick up arm and having V-shape notches of greater width thanthe tangs, the

apices of saidV-shape notches,

at oneend to ends of said arms and otherend engaged in the thr'ead'soi the adjustthe, pick'up'arm adjacent to the tangs being pivotally through the bracket,

\ turntable and a reproducer from, forwardly disposed ing outwardly from an intermediate portion of 'the. arms, the pick up movement of the pick up arm.

9. In a phonograph including a turntable, a hollow pick up arm, means pivotally mounting one end of the pick up arm adjacent to the other end of the hollow pick up arm, mounting for adjustably mounting the reproducer within the pick up arm, said pivot mounting including a pair of arms rigidly attached-to the reproducer and extending rearwardly there- V-shape' tangs extendarm having V-shape than said tangs, the tangs being pivotally notches of greater width apices of the V- hape *mounted in theapices of said V-shape notches,

located within the other 1 a pivot mounting for adjustably mounting the reproducer within "mg one end of the pick a pin connecting the rear ends of the arms, an adjusting screw in'the pick up arm extending between said arms at a point adjacent to the V- shape tangs, and a spring connected at one end to the pin and engaged in the threads of the adjusting screw.

10. In a phonograph including a turntable, a hollow pick up arm, means pivotally mountturntable and a reproducer located within the other end of the hollow pick up arm, a pivot mounting for adjustably' mounting the reproducer within the pick up arm, said pivot mounting including a pair of spring arms rigidly attached to the reproducer and extending rearwardly therefrom,

. tangs extending outwardly from an intermediate portion of the arms, the pick up arm having V- shape notches of greater width than said tangs,

the apices oi the V-shapetangs being pivotally I mounted in the apices of said V- 'shape notches, a pin connecting the rear ends of the arms, an

- er within the pick up arm,

including a pair of arms reproducer and extending rearwardly therefrom within the pick up arm having V-shape notches of greater width the outer having. a hook at its .'screw in the bracket extending arms at -a point adjacent to the V -'shape tangs, and a spring connected at oneend to the pin its other end engaged in the threads of the adjusting screw in the pickup arm extendin between said arms at a point adjacent to the. V-shape tangs,

end'to the pin and having a hook-at its other threads of the adjusting and a spring connected at one end engaged in the screw. y

'11. In a phonograph including a turntable, a hollow pick up arm, meanspivotally mountin one end of the pick up arm adjacent to the turntable and a reproducer located within the other end of the'hollow pick up arm, mounting for adjustably mounting the reproducsaid pivot mounting rigidly attached tothe forwardly disposed V- hape tangs extending outwardly from an intermediate portion of the arms, an inverted U-shape bracket mounted than said tangs, theapices of the V-shape tangsv being pivctally mounted in the apices of said V-shape'notches, a pin connecting the rearends of the arms; an adjusting between said and having a hook at adjusting screw. E Q v- S R- located, within the a pivot having a hook at its other end up arm adjacent to the v forwardly disposed V-shape'

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