US1414898A - Graphophone - Google Patents

Description

L, ROBERTO. GBAPHOPHONE.

vAPPLICATION FILED OCT. 28, |920.

Patented May 2, 1922.

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" L. ROBERTO.

GRAPFOPHONE.v APPLICATION m50 ocT. 2a. 1920.

Patented May 2, 1922,

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L.l ROBEBTU.

GRAPHOPHONE.

APPLICATION FILED oc-zs. 1920.

Patented May 2, 19222..

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LEOPOLDO ROBERTO, or 'PHILAnEnrHIA, rENNsYLvANrA.

GRPHOPHONE.

Specification of Ltt'ei'sviatent.

Patented 'May 2., 1922.

Application sled voctober 28,1920. lserial No. 420,147.

Graphophones, of which the followingisa specification.

llhisinvention relates to certain new and useful improvements in graphophone's, and has particular reference to the tone ammv sound box mounting.

A further object of the invention lresides in the provision of a graphophone wherein the tone arm is freely detachable therefrom with the hinged cover of the graphophone box constituting a sounding board upon which the outlet end of the tone arm is sup'- ported.

A further object of the invention is lo provide a tone arm for ygraphophones where'- in the tone arm embodies a hinge connection intermediate the ends thereof to permit that portion of the tone arm supporting the sound box tobe moved upon its hinge con nection to displace the sound box from 'the record disk.

A Still further object 'of the inventionem'- bodies a novel adjustable mounting of a sound box on a tone arm, thesound box being mounted in different angular relations relative to the tone arm to accommodate Vthe stylus needle in traversing the playing grooves of a record disk of dierent formations.

With the above general objects in'view and others that will appear as the nature of the invention is better understood, the same consists in thenovel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings, wherein like -reference characters indicate corresponding parts throughout the several views,

Figure l is a side elevational view of a gr-aphophone constructed in 'accordance with the present invention, a portion of the Vseotional tone arm and sound box being moved to inoperative position and illustrated by dotted lines,

Figure 2 is a top plan view of the same,

Figure 3 is a front elevational view of the tone arm with the hinged section thereof elevated to inoperative position,

Figure 4 is a horizontal sectional view taken on lineIV-IV `of Fig. 'showing the rotatable connection between the tone arm and the-s'upported bell end thereof,

igure 5 is a cross sectional view taken onhne V--V of Fig. l showing the stylus armroff the gsound b'oxzconnected to the diaphragm, ,Y

Figure Gfisa-fronjt elevational view of the removable-'elbow of the tone var'm for supporting the sound box,

K Figure 7 is ra Side elevational View of the removable-elbow `of the tone arm,

FigurefS is ra fragmentary side elevational view of the inner end of the tone arm showing the hinge connection between the sectionsthereof, and

Figure 9 is a ycross `sectional view showing the 1connecting means between the elbow seetionandthe rhinged endof the tone arm.

' Referring more in detail to the accompanying drawings and particularly to Figs. l 'and-2, there is illustrated a f raphophone comprising abox l of hexagonal formation having 2a hingedicover 2 constituting a sound board vfor thetone arm while the box l is provided with lifting handles 3 and an exteriorlypositionedy crank-handle 4 for winding the motor mechanism contained within the'box. A turntable `5 is supported upon thejplatform-G of .thebox and the speed of themotor mechanism is under'control of the lever 7 vas shown in Fig. 2 while the turn table I5 'is maintained` -stationary by the brake lever 8.

` The tone arm and sound box is shown in 'detail in Figs. 3 to9 and includes a horn embodying-sections 9 `and l0, the section 9 being rotatably connected tothe enlarged hellend :.111 by vva :pin Va- nd slot connection 12 and 13 las shown in Figs. 3 and 4, the bell end carrying-supporting pins 14 engaging infsockets 15 in the sound board covery 2 as lshownin Figs. il and 3, the bell end 1l being mounted against rotation andk permitting limited Yrotary 'movement of the tone arm section :9 'relative thereto.

The sections) and 10 of the tone arm are A removable elbow embodying an intermediate curved portion and right angularly extending ends is associated with the :tree end of the tone arm section 10 and to accommodate the connection therefor, the free end oi' the tone arm section 10 as shown in Figs, 3, 8 and 9 is provided with an annular flange 18 having the edge thereo'll provided with two pairs of relatively small and large recesses 19 and 2O and having relatively small perforations 19 diametrically opposite the small recesses 19 Lfor purposes presently to appear. The removable elbow section is shown more clearly in Figs. 6 and 7 embodying a tubular member of equal diameter throughout and having an intermediate curved portion 21 with an angularly directed end 22 while the other end 23 thereof extends at right angles to the end 22. rllhe outer side of the elbow section end 22 is provided with a lug 24; while a screw pin 25 having an operating head 26 is threaded transA versely of the open end 22 with the head 26 of the screw adjacent the lug 2a. In mounting the elbow section 21 upon the tone arm. section 10, the end 22 of the elbow section enters the flange 18 of the tone arm section 10 with the lug .24 upon the elbow received in one of the large recesses 2O with the shank of the screw 25 received in a small recess 19 providing a clearance therefor, the end of the screw pin 25 opposite the head 26 adapted to engage in one of the perorations 19 when the said pin is rotated. ln this position the screw 25 has the free end thereof extending through alined openings in the end 22 of the elbow and through the flange 18 ot the tone arm section 10, the lug 2a locking the elbow within the tone arm section against rotary movement while the screw 25 securely retains the elbow within the tone arm. Y

The sound box shown in detail in Fig. 5 is preferably heart shape embodying a rear wall 27 carrying a collar 28 for reception upon the open end 23 of the elbow section 2l while a removable clampingrplate 29 associated with the plate 27 clamps the dia-V phragm 30 within the sound box between the gaskets 31. A pair of brackets 32 is carried by the lower end oit' the clamping plate 29 and supports the cross arm 33 of the stylus bar 3a, a set screw 85 being carried by the cross arm 33 tor retaining a stylus needle 36 in position in the cross arm.

The screw pin and lug connection between the elbow section 21 and the tone arm permits the diti'erent angular mountings of the sound box upon the tone arm as shown by full and dotted lines in Figs. 1 and 2, the grooves of the record disk 37 being of various forms, some including vertical side walls and others tapering side walls so that the angular' adjustment of the sound box as provided by this mounting will present the stylus needle for .proper playing position with records of various forms ot grooves. When the sound box travels inwardly toward the center of the disk 37, the tone arm section 10 will rotate upon the bell mounting end 11 and at the playing end of the record the tone arm section 10 is moved upon its hinge connection 17 with the section 9 to elevate the sound box 27 from the disk 37. rllhe elbow section 21 may be mounted upon the tone arm section 10 to present major transverse axis of the sound box in parallel with the longitudinal axis of the tone arm, and by removing the screw 25 the elbow section 2l may be shifted relative to the tone arm section 10 to present the major transverse axis of the sound box at right angles to the longi-i tudinal axis of the tone arm as shown by dotted lines in Fig. 2. The mounting flange 28 ot the sound box is permitted a slight rotary movement on the end 23 of the elbow section to accommodate the sound box in encountering irregularities in the playing grooves.

`While there is herein shown and described the preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

lNhat is claimed as new'is A tone arm for graphophones having a pair of relatively small and a pair of relatively large notches within the inner end of the tone arm and perforated at points diametrically opposite the small notches of the tone arm, an elbow section received in the inner end of the tone arm and having an integral lateral lug engaging in one of said relatively large recesses to prevent rotary movement of the elbow in the tone arm, a transverse screw carried by the elbow, the portion of the screw between the elbow and its head being received in one of the small recesses of the said tone arm and the opposite end of said screw passing through the elbow and into one of the perforations of the tonearm to retain the elbow therein, and a sound box carried by the other end of the elbow.

ln testimony whereof l aiiix my signature.

LEFOLD@ HUBERT@

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