US1537171A - Phonograph - Google Patents

Description

E Mm Km 0 w .H P 2 9. 2 1 Y M Original Filed Nov. 26, 1921 4 Sheets-Sheet 1 INVENTOR BY 3 ATTORNEY H. KAYE May 12, 1 925.

PHONOGRAPH Original Filed Nov. 26, 1921 4 sheets -sheet 2 ML gdnfimo z Vm M191 ATTORNE Y i May 12, m H. J. KAYE PHONOGRAPH Original Filed Nov. 26, 1921 4 Sheets-Sheet 5 INVENTOR ATTORNEYs May 12, 1925.

H. J. KAYE PHONOGRAPH Original Filed 1921 4 Sheets-Sheet 4- ATTORNEY s Patented May 12, 1925.

HAROLD J. KAYE, OF NEW YORK, N. Y. a

PHONOGR-APH.

Application filed November 26, 1921, Serial No. 518,006. Renewed March 20, 1924.

To all whom it may concern: 7

Be it known that I. HAROLD J. IXAYE, a

citizen of the United States, and a resident of the borough of Bronx, county of Bronx, city and State of New York, have invented an Improvement in Phonographs, of which the following is a specification.

The present invention relates to an improvement in phonographs, one object being to provide a phonograph construction which may be embodied in a relatively small and compact device. easily transported from place to place. It is also contemplated that a phonograph construction embodying my improvements can be made at relatively low cost without in any respect sacrificing the tone quality. In addition to those features which have to do more particularly with the problem of reducing the size of the instrument, I have incorporated other improvements which may be utilized upon instruments regardless of their size or of their cost of production.

An embodiment of my invention is illus-:

trated in the drawings accompanying the present specification and in which- Figure 1 is a iew in perspective,

Figure 2, a similar view with a portion of the casing broken away to expose the interior and showing the parts dismounted and packed for transportation,

Figure 3, a. fragmentary view showing in detail the construction of the turntable,

Figure .2, a fragmentary view in vertical section of the turntable, I

Figure 5, a fragmentary view in vertical section illustrating the universal joint connection between the tone arm and the horn,

Figure 6,. a modified form of turntable construction, and

Figure 7, a vertical section of said modified form of turntable.

Referring to the drawings, the phonograph there illustrated comprises a casing 1 in which is arranged a horn 2 and a motor of suitable type not shown but which is in'position at one side of a partition wall 3which, together with other walls of the casing, forms a convenient receptacle for a plurality of turntable arms 4, Figure 2. The casing 1 is provided with a hinged cover 5 havinga latch 6 by means of which the -.cover may be locked to a fixed portion of the casing. Vhere it is contemplated that the instrumentis to be elevated when in use, a plurality of legs 7, preferably hinged to the casing so that they can be folded up "and assembled compactly therewith, are provided. The casing may also be provided with a plurality of fixed legs 8,

preferably formed of insulating material such as rubber, felt or cork and. for convenience in transporting, a handle 9 is secured at any convenient place to the outside of the casing.

Referring now more particularly to Figure 4, the main shaft 10 of the motor is provided with a tapered recess or socket 11 adapted to receive and retain a tapered stud or spindle 12 upon which is mounted a hub .13. In the form of turntable illustrated in Figures 3 and 4, the hub 1.3 has a central undercut portion 14 adapted to engage the inner ends of the turntable arms 4 when in assembled position with respect to said hub. Each of these arms has a pair of recesses 15 0 U s and 16 ad acent to the inner end and positioned to engage a pair of projecting membars or lugs 17 and 18 extending upwardly ,from the hub. Thus. the undercut portion 14 prevents tilting of the end of the arms in a vertical direction while the lugs 17 and 18 prevent lateral displacement'of the arms with respect to the hub.

I have also provided convenient means for stopping the rotation of the turntable consisting of a brake shoe 19 mounted on a rod 20 which ma" be moved toward and away from the hub of the turntable by suitable means, in the present case. by means of a screw. A projecting member 21-acts desired.

The modified form of turntable, as shown in Figures 6 and 7 includes a tapered spindie 24 adapted to fit the tapered socketll.

of the shaft 10 and a hub having a depressed central portion25 adapted to receive the.

end 26 of a modifieckform of record supporting turntable arms 4. Cooperating with said hub, is a locking'mcmbcr also engaging the spindle 24 and having a plurality of radially extending arm engaging members 27 each provided with .lugs 28 adapted to fit into similarly shaped recesses 29 formed in the radial portion of the record supporting arms 4:. It is contemplated that the modified construction permits the parts to be stamped out of suitable metal and effectively prevents undesirable shifting or' displacement of the record supporting arms in operation. Obviously, variations of the locking means thus disclosed may be employed advantageously without, however, departing from the contemplated scope of the invention herein disclosed.

Referring to Figures 2 and 5, it will be noted that the horn is curved so that its inlet end extends to and through a suitably located opening in the casing. As shown in Figure 5, a tone arm supporting member 30 is mounted adjacent to the inlet end of the horn 2 and is provided with a recess 31 adapted to receive and support a pin or pivot member 32 to which is secured a transverse bar 3-3. The outlet end of the tone arm is pivotally mounted at the ends of said bar 33 and is rotatable about said bar in a vertical direction and is also rotatable in a horizontal direction upon the supporting member 30, thus giving the tone arm free movement. A collar 34 fits into the open end of the horn and encircles the lower end of the tone arm, being held in place by means of an annular projecting portion.

The tone arm supporting mechanism just described is very simple and provides a particularly effective mounting which makes it possible to give the tone arm almost universal movement with respect to the record. Furthermore, this construction permits the tone arm to be readily mounted and dismounted without phonograph construction.

\eferring now to Figures 2 and 5, I have illustrated a preferred form of mounting the horn of a phonograph for the purpose of securing a clear tone. One object has been to eliminate from the operation of a phonograph in so far as possible, all vibrations which would detrimentally affect the character or intensity of the sound waves as transl'uitted from the diaphragm of the sound box. To this end, I have mounted the horn at three points, one at each side of the wave receiving end of the horn, and one adjacent to the discharge end of the horn. At

veach point, I have provided an insulatingmember 43 interposed between the horn and the casing or other part of the device, said insulating members consisting preferably of a fibrous material or a rubber or other suitable material not readily adapted to trans mit vibrations. Thus, in operation, it .is contemplated that the waves emanating from the horn will not be materially altered otherwise affecting the or obstructed on account of vibrations set up in the casing or other parts of the device outside of the diaphragm and the sound box and it Will therefore be possible to secure a desirablepurity of tone. 1'

From the foregoing description, it will be clear that my improved phonograph provides a compact and readily assembled instrument having all of the necessary features of a sound reproducing machine embodied in a very small volume. As shown in Figure 2, the tone arm is preferably so shaped and proportioned that it will tit within the horn together with the motor -winding handle if desired. Suitable covers may be provided for protecting the shaft of the motor and the opening into the horn,

thus making an effective and neat appear 111g device to carry from place to place.

I claim as my invention: A

l. A turntable for phonographs comprising a rotatable member, detachable record engaging and supporting means, and means to prevent vertical displacement of the rotatable member engaging portion of the record engaging and supporting means.

2. A turntable for phonographs comprising a hub, a plurality of record supporting arms detachablv mounted on said hub, and means for retaining said arms against relative movement of rotation with respect to said hub.

3. A turntable for phonographs comprising a hub, a plurality of record supporting arms, and means for detachably mounting said arms on the hub including means to prevent the inner ends of said arms from tilting vertically and means for preventing lateral displacement of the arms with respect to the hub.

t. A turntable for phonographs comprising a hub, a plurality of record supporting arms, and means for detachably mounting said arms on the hub including an undercut flange on the hub to engage the inner ends of the arms, and means for preventing lateral relative movement between said hub and the arms.

5. A turntable for phonographs compris- I November, 1921.

HAROLD J. KAYE.

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