US1139224A - Talking-machine. - Google Patents

Description

W. H. PUMPHREY.

TALKING MACHINE.

APPLICATION FILED oc.5.I9II.

Patented May 11,4 1915.

2 4SHEETS--SHEET 2.

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ATE T 'WALTER HYER PUMPHREY, OF NEW YORK, N. Y., ASSIGNOR TO AMERICAN GRAPHO- PHONE COMPANY, F BRIDGEPORT, GINIA.

CONNECTICUT, A CORPORATION OF `WEST VIR- TALKING-MACHINE.

' T0 all whom it may concern Bo .it known that I, WALTER H. PUMrnREY, a citizen of the United States of America` residing at New York, in the boroughiof Manhattan, countyand `State of New York, have invented certain new and useful Improvements in Talking-Machines, of which the following is a specification.

My invention relates generally to talkingmachines and has particular reference to the mounting 'of the tonearm thereof.

The obj ect'of the invention is to produce a mounting for the tone-arm employing a minimum number of parts, of extremely simple construction, which may be manufactured at a comparatively low cost and quickly assembled.

`A further object is to 'arrange the parts in such relation as to make them 'readily accessible and facilitate their removal for purposes of examination or repair, etc.

A further object is to minimize friction in the mounting without in any way interfering with or limiting the freedom of movement of the tone-arm. i

These and other objects and advantages are attained by the construction hereinafter described.

The accompanying drawings will serve to illustrate mechanism suitable for carrying my invention into effect. I wish it understood, however, that I do not limit myself to either the exact form or the details shown,

i as various changes may be made within the meaning of the present invention.

In the drawings: Figure 1 1s a longitudinal section illustrating the application of my invention to a well known type of here shown, having a turn-table mounted thereon as a support for a disk type of record, with which a sound reproducer 2 is adapted to cooperate, in the usual manner.

The sound-box or reproducer 2 is secured to the free end of a tone-arm 3, which is mounted at 4, as will be hereinafter de- Specication of Letters Patent.

`ably secured thereon Patented May 11, 1915.

Application filed October 5, 1911. Serial No. 652,916.

scribed, to have movement and swing freely in both vertical and horizontal planes, in'

oider that the stylus of the reproducer may track in the record-groove and be fed across the disk by it, in the usual manner.

The mounting, shown at 4, serves to connect the tone-arm and-the sound-amplifying means, which latter appears here as a concealed horn 5, i'. e. a horn contained within the cabinet, and as the shape and arrangement of the same form no part of the present invention, it will not be further described.

rIhe preferred construction of mounting is illustrated in Fig. 1, and takes the general form of a ball-and-socket joint, the end .6 of the tone-arm being shaped exteriorly It will be observed that the annular sur-v face or wall of the opening? meets the spherical surface of the tone-arm in tangential relation throughout the circumference thereof, and that thc line of contact coincides with the plane of the upper sui face or bearing 10 of the ringplato and also with the center of the spherical enlargement of the tone-arm. The ring-plate, thus arranged, prescn'ts two annular converging surfaces which meot or intersect along a circular line. y T heee are the surface 7, serving to center the tone-arm in the mounting, and the bearing surface 10, acting as a support on which the arm maintains itself by its own weight, and on which it is freely movable both vertically and horizontally. This brings the vertical and the horizontal axes where they intersect in the plane of the surface 10.

As shown, the mounting vfor the tone-arm is made up of separable sections, one ofA which is the ring-plate 8, above referred to. The base section 11 has the ring-plate removby screws l2, and is preferably eut away interiorly as at 13, to clear the spherical portion of the tone-arm in all positions to which the latter may be swung.

vOrdinarily, the tone-arm will maintain arm `but encircles it above the point the mounting.

-is being shipped or itself in operative relation to the bearings by its own Weight; but when the machine moved about from place to place, or is inthe hands of careless users, it is desirable t provide means for holding the 4arm in position. For this purpose, a lthird section 14 may be employed in the form of a retaining-ring, as shown in Fig. 2. The ring 14 is cut away interiorly to normally clear the spherical portion of `the toneclosely enough at 15, of greatest diameter, to prevent accidental removal of the arm from From the foregoing, 'it' will be seen that only one section of the mounting is in contact with the arm and that such contact is limited to the engaging faces of the projections 9 onfthe bearing 10.; The tangential relation between the wall of theopening 7 of the arm-supporting bearing l0, miniinizes friction and reduces the function of .the

bearing 7 yto that of a mere guide to maintain the arm in centered relation in the on or off; and for the such movement to the It is desirable to limit the swing of the tone-arm across the record, and for this purpose'the lretaining-ringr 14: maybe cut aw y as shown,`to provide shoulders 16, 1G, which co-act with the projections 9, as stops.

Fig. 3 I h mounting having the same general characbutin this instance a helical spring 17, centrally located interiorily of the arm and mounting, isf' substituted for the retainingring 14I shown in Fig. 2, and serves to yieldingly maintainthearm in operative relation in the mounting, and against accidental removal.

The form of arm and a mounting illustrated inrFi s. llfand 2 is specially adapted for automatlcally operating a motor-brake of the type disclosed and claimed in my prior PatentvNo.' 1,006,128, granted Oct. 17, rake referred to is of the springthrown type but requires to be positivelyad- -vancedorretracted a definite distance before thespring acts to throw the brake either purpose of imparting brake, there may formed on the spherical portion of the arm a`.l'1p `18, shaped to enter the notched end ".19 of n lever 20, pivoted at 21, in a S101: 22

'ducer' clear of ..1n th Inected through a' rod 23 .50 24 e base section of the mounting, and conwith the brake-lever Thus arranged, upward movement of the tone-arm to lift the sound-box or reprothe record, will be imparted to shift the brale far enough for the same; and

ave shown a one-piece 'end as a downward movement of the sound-box (to playing position on the record) will, in a similar manner, be transmitted to cause the spring to act in throwing off the brake.

The lip 18 on the tone-arm is given such length as to insure its remaining inengagement with the notched -end of the lever 20, in any and all positions to which the tonearm may be swung, and when suilicicntly extended, retaining-ring lt'may be dispensed with.

The many important advantages of. my invention will be apparent from the foregoing, as will also the mode of operatini and use and further description thereof will not begiven.

Having, therefore, described my invention, I'elaim:

. l. In a talking machine, of a tone-arm supporting ring provided with a bearing surface, and a tone-arm arranged to haveboth vertical and horizontal movements, the axes of which movements intersect in the plane. of said bearing surface.

2. In a talking machine, the combination of a horif/,ontallydisposed tone-arm 'supporting ring provided with a bearing surface, and `a tone-arm shaped at one end as a portion of al sphere, and arranged to have both vertical and horizontal movements, the axes of which movements intersect in the plane of said bearing surface.

3. A tone-arm shaped eXteriorly at one end as a portion of a sphere, and a mounting for the spherical end of the arm comprising a member having two annular surfaces relatively arranged to contactp'ith the arm onlv in a plane passing through the center of the sphere, one of said Vsurfaces forming a bearing surface.

4. A tone-arm shaped exteriofnly at one the reverse or ing a member having two annular surfaces relatively arranged vto contact 'with .the arm. only in a plane passing through the center of the sphere, one of said ing ay bearing surface, and retaining means for the arm above said bearing surface.

5. A tone-arm shaped exteriorly at one portion of a sphere and a mounting for the shaped end of the arm comprising a bearing member having /twoannular surfaces relatively arranged to contact with the arm only in a plane passing through the center ofthe spherical portion thereof, and a removable retaining ring forA the arm above the bearing member.

G. A tone-arm shaped exteriorly at one end as a portion of a sphere and a mountingT for the shaped end of the arm comprising a bearing member having two annular surfaces relatively 'arranged to contact with the arm only :in-a

plane passing surfaces formthrough the center of the spherical portion thereof, a removable retaining' ring oithe anni above the hearing member, and coacting means on the tone-ann andi mounting to liniit the movement of the afin.

l1 ln a talking inaehine, the combination `of a tone-afin bearine' ei1rfaoe,aiid a toneain arranged to have both vertical. and horizontal movements, the axes of which movements intersee'f'; in the piene of Said hearing' surface., forni of n, portion of a sphere Contacting with said hearing surface only in the plane of said staff-ace.

8. 'ln a talking machine, the Combination of an annular 'tone-arm heaing surface, and a tone-aun arranged to have hoth Vertical and horizontal movements, the' axes of which movements intersect in the planeU o'said bearing surface, said tone-arm havlng,` a sphetical portion contacting with said bearing surface only in 'the plane et sind l en rface.

9. In a talking; machine, the combination of' a horizontally disposed tone-arm loeaia ing suiface, anti. a A'tone-arm arranged to have" both vertical and horizontal movements, the axes of which movements int-eiseet in the plane of said' beni-ing sui-face,

said tone-arm having; :i pai't in the` of the supporting surface of said ring.

1L In n talking; niaehine, the combination of a tone-arm supporting ring having two surfaces which eonTe-ige and nieet in a circular line, an@L tone-aun having'a part in the Lfoiin oi' a portion of a sphere 'which contacts with said ring only along said oirenlai line, saidtone-aim being arranged to have both 'vertical and horizontal moyeinents, tl e axes of which nioyeinents'intersect in the plane of one of said surfaces.`

slt/ALTER HYER PUPHREY.

Vvtnesses C. A. L. lvessin, Ramen L, SCOTT

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