US1156130A - Adapter for talking-machines. - Google Patents

Description

UNITED STATES PATENT OFFICE.

PLINY CATUCGI, OF NEWARK, NEW JERSEY, ASSIGNOR TO A. F. MEISSELBACH & BROTHER, A CORPORATION OF NEW JERSEY.

ADAPTER: FOR TALKING-MACHINES.

Talking-Machines, of which the following is a specification.

My lnventionrelates to devices for use in connection with one of the well known talking machines now on the market and is designed as an attachment to the tone arm of the machine so as to adapt the "sound box for use in playing any kind of disk record now on the market. Such disk records are made in various ways, as for example by the well known Berliner method, whereby the record groove is in the form of a zig-zag spiral groove of uniform depth impressed in the record. The best results with such record are obtained by locating the sound box with its diaphragm in a plane perpendicular to the plane of the record disk, so that the stylus needle across the direction of the record groove. Other records made in accordance with the well known Edison method have the sound groove running in a spiral, but the sound waves are formed by a' series of successive elevations and excavations within the groove. -In this case, the sound box must have its diaphragm located in a plane passing substantially through the center of the record disk, but intersecting said disk at an acute angle.

In order that the stylus needle of the sound box may properly track in the record groove, the parts must be adjusted so that the tone arm, swinging about its center,

must carry the point of the stylus in an arc which passes throughthe center of the r0 tating disk record. If'the stylus point varies materially from this are, jump out of the grooveand race across the face of the .disk to the obvious injury of the record and certainly spoiling the rendition of the selection upon it.

It is the purpose of my improvement to provide a connectionfor the tone arm and Specification of Letters Patent.

may vibrate laterally I then it is liable to.

Patented Oct. 12, 19] 5;.

Application filed .Tanuary 28, 1914. Serial No. 814,867.

sound box of a talking machine, whereby the same sound box may be utilized for the reproduction of records either of the Berliner type or of the Edison type; thatis, the records in which the sound groove is a zig-zag spiral of uniform depth, or where the sound record 15 made by excavations and elevations. I

In carrying out my invention, I make use 'of the structure substantially as illustrated in the accompanying drawings, wherein-- Figure 1, illustrates a plan view of the tone arm and sound box of atalking machine with my improved adapter in position for playing records of the Edison type, and also in dotted lines, the sound box in posit1on for playing records of the Berliner type. Fig. 2, is a side elevation of the same showing in dotted lines the position occupied bythe sound box for the reproduction of records of the Berliner type. Fig. is a top plan view of my improved adapter. Fig. 4, is a right-hand end view. Fig. 5, is a bottom lan view. Fig. 6, is an end plan View sho ing the means for securing the adapter to the tone arm of the talking machine.

Similar letters of reference refer to like parts throughout the specification and drawlngs.

My adapter consists of a tubular extension designed for connection directly with the oscillating part of the tone arm of one of the well known talking machines now on sound box connecting thimble 8. Upon one side of the short connecting thimble 2, I

integral with the provide a projection 9,

but split as shown solid body of the thimble,

-..at 10, by means of a saw kerf. The p'rojec tion is also slit away from the body of the thimble at 11. Threaded through the parts of this projection 9, is the thumb screw 12, by means of which the thimble2, may be contracted and expanded to grip the outer end of the our i 1.11:2 L 'iifiliel' 13, of the tone arm 11..

The thimble 8, car is reduced in diameter siight re the connecting thimble 15, of the sound. box 16. The latter may be of any usual or preferred type, and for the purpose of illustration, I have shown the one disclosed in my Patent #1.,O59,3+t(3 of {iii 22, 1913. The side of the thimble is provided with a slot 17, which is designed to receive a pin (not shown) extending inwardly from the thimble 15, for properly positioning the sound box upon the adapter. The sound box thimble 15, is provided with a circumferential groove 18, to receive the bent end of the holding spring 19, the latter being secured to the elbow 7 of the adapter through the boss 20, and screw 21.

It will be noted 'that the direction of the axis of the thimble 8, lies slightly out of the main axial plane of the adapter, as clearly illustrated in Fig. The degree of this angularity depends upon the kind of reproduccr. and stylus to be used, but ordi-' narily I have found'that the angle between the axis of the thimble 8, and the main axial plane of the adapter should be about 15 degrees. W-

As indicated in Fig. 2, the tone arm 1 1,

is pivoted at 22, upon the supporting arm 23,.to swing in the arc of a circle about the pivot 22. The distance between the pivot 22, and the center of rotation 24, of the record disk, should be such that the point of the stylus 25, upon the sound box should swing in the are 26, of a circle passing .through the center 24. If for any reason the stylus falls upon the face of the record at a point materially away from this arc, either one side or the other, the stylus will not properly track as heretofore indicated. It, therefore, has been necessary to provide the adapter with what may be termed reverse bends, so that in practice the stylus of the sound box attached thereto will swing in the same are of the circle passing through the center 24, of the rotating disk record, as is the case where the sound box is connected directly to the oscillating member13, as indicated in Fig. 1.

It will thus be seen that-with the use of my improvement upon talking machines of the kind illustrated in the drawings for playing records of the Berliner type, the same sound box may be'us'ed for playing records of the so called Edison type. In the first case, the sound box is connected directly to the oscillating nien'iber 13, as shown in dotted lines both in Figs. 1 and 2, in which case the point of the stylus swings in the are 26, passing through the center of rotation 24, of the record. With the adapter in place, the same sound box 16, with the point of its stylus '25, is'made to swing in From a reference to Fig. 2, of the drawing, it will be noted that the general plane of the sound box body 16, coincides substantially with the axis passing through the outer terminus of the oscillating member 13, of the tone arm. In order to accomplish this result, it will be noted that the thimble 8, must be considerably shorter than the tubular part 4:, of the adapter so that the open end of the thimble 8 lies outside 01 what would be the tubular end 2, if the same were rearwardly extended;

I claim: p

1. An adapter for talking machines comprising a tubular member having a tone arm clamping thimble at one end and a soundgrees with the main axial plane of said tubular member.

2. An adapter for talking machines com- I prising a rigid tubular member having a clamping thimble at one end for connection to the tone arm of a talking machine, said tubular member being reversely bent between its ends to bring its outer, free end substantially at right angles to said clamping thimble with the extreme free end opening to the rear of and toward the extended axis of said clamping thimble.

3. An adapter for talking machines co prising a tubular member having a clam ing thimble at one end thereof adaptedfor securing said member to the oscillating goose neck of a talking machine tone arm, said member being reversely bent to bring its opposite end to the rear of the axis of and at right anglesto the clamping thimble with the axis of said opposite end lying at an angle of substantially 15 degrees above the main axial plane of the tubular member.

I 4. An adapter for talking machines comprising a tubular section having-rectangular elbows at'each end thereof, the outer ends of said elbows lying at an angle of 15 de grees apart, a second tubular section integral with one of said elbows, and a rectangular elbow and a clampingdevice upon the free end of said second section, the axis .of said last named elbow lying forward of the open end of the elbow at the opposite end.

In a device of the class described, the combination of a tone arm pivoted to swing in a horizontal plane, a pivoted goose-neck upon the free end of said tone arm, and a rigid tubu] r adapter secured. to the the center of rotationcf the talking machine end of sai pose-neck, said adapter being reversely Tn to bring its free end to -the rear of the extended axis of theouter end I. of said goose neck whereby when a Sound box is secured to the freeemi 0f said adapter the stylus of said sounid box "will wing in the are of a circle passing'through recgwd. V m

In testimony whereof, I have hereunto set my hand this 23rd day of'January, 1914.

PLINY CATUGGI. In presence of,

NORMAN E. ZUSI, LOUIS M. SANDERS.

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