US669895A - Sound-box support for graphophones. - Google Patents

Description

` Patented Mar. |2, 190|. c. BunKHART. SOUND BOX SUPPDRT FOR GRAPHUPHUNES.

' (Applicatin med Apr. 4, 1900.)

(No Model.)

PHoTaLlTHn., WASmNGToN, n. c.

" ED STATES .PATENT SOUND-BOX SUPPORT FOR GRAPHOPHONES.

SPECIFICATION forming part of Letters Patent N o. 669,895, dated March 12, 1901.

Application iled April 4, 1900.

To all whom it may con/cern.-

Beit known that I, CHARLES BURKHART, a citizen of the United States, residing at Altoona, in the county oflair and State of Pennsylvania, have invented a new and useful Sound-Box Support for Graphophones, of which the following is a specification.

This invention relates to graphophones; and it has for its object to provide a support for the sound-box which will hold the box to make top contact of its stylus with the record in such manner that it may be readily raised and lowered by the operation of the usual lifting-lug.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a side elevation showing a graphophone and illustrating the operative positions ot' the record, the sound-box, and the present attachment. Fig. 2 is a perspective view showing the attachment removed from the feed-carriage. Fig. 3 is a vertical central section taken through the supporting attachment. Fig. 4 is a detail perspective `view showing a modified form of the pivoted sound-tube which is adapted for engagement by the common form of sound-box. Fig. 5 is a longitudinal central section of the pivoted sound-tube and illustrating the depressions in which the pivot-screws are engaged.

Referring now to the drawings, the soundbox support comprises a hollow upright or post 5, at the upper end of which is a transverse tubular head 6, which lies at a right angle to the post, but which does not communicate with the interior of thepost. One end 7 of the head 6 is reduced in diameter to receive the end of the sound-funnel 7', which is engaged thereover in the usual manner or to receive the usual ear-tubes.

A short sound-tube 9 has a section 10 of a ball at one end,` the exterior diameter of which is approximately equal to the interior diameter of the head 6, into which this ballsection is fitted with sufficientlooseness to permit the outer end of the short section to b'e raised and lowered. The ball is held against displacement from the head 6 by means of pivot-screws 11, which are engaged with threaded perforations in the sides of the head, so that they may be screwed inwardly to Serial No. 11,508. (No model..l

engage their inner tapered ends with conical depressions 10' 11 at diametrically opposite points of the ball-head of the short soundtube 9. Thus the outer end of the tube 9 may be raised and lowered to correspondinglymove the sound-box, the sound-tube 13 of which is slipped into the outer end of the short tube 9 and is held therein by means of a pin 14, which is engaged with alining perforations 13 and 14 in the short tube 9 and the sound-tube 13, this pin 14 being of such length as not to reach into the inclosure of the pivoted tube 9, and thus not to interfere in any manner with the sound-waves passing therethrough. It will thus be seen that there is a clear passage for the sound-waves through the parts from the box to the funnel.

At the lower end of the post 5 is an enlarged base 15, which is arc-shaped and is bifurcated, the resultant legs extending at both sides of the post, as shown. The slot that forms the bifurcation is extended through the lower end of the post 5, and in practice the post is disposed with its arc-shaped base upon and receiving the upper portion of the feed-carriage, which latter is provided with a rounded portion which fits the base. The feed-carriage is carried by the usual screw 16, it being understood that the rotation of this screw feeds the carriage, and therewith the sound-box, along the record, the supporting attachment being held in place upon the carriage by means of screws, which are passed through perforations at the ends of the legs of the bifurcated base, said screws engaging threaded perforations in the carriage. The carriage carries a loose ring having a lug 18 at one side and a finger-piece 19 at the otherside, this ring lying with its upper portion in the slot which bifurcates the baseof the post 5 and with the lug projecting between the legs of the base in the direction of the record and with the finger-piece projecting between the legs of the base in an outward direction for ready manipulation by the operator. In the usual construction when this inger-piece is depressed the lugis raised and acts to` raise the soundbox from the record, as shown in the patent to T. H. Macdonald, No. 579,595, granted March 30, 1897.

In order to provide for raising and lowering the sound-box when the finger-piece is de- IOO pressed, a rod is disposed Within .the tubular post 5, as shown at 20, and engaged with the ends of this rod are cylindrical blocks 21, which slidingly fit the post. At the inner side of the post are formed two slots 22 and 23, which lie opposite to the blocks 21, and through these slots are passed two L-shaped rods or arms 24 and 25, the upper arm having its outer end turned upwardly-and bifurcated to form a fork 26, which receives the short tube 9 outside of the head 6. The lower arm 25 has its outer end bentdownwardly to The rod 20 and armsv lie against the lug 18. 24 and 25 have threaded engagement with the blocks 21, so that they may be properly adjusted with respect to each other, and it will be seen that when the finger-piece is depressed to raise the lug the arms and rod will be likewise raised and the boX will be lifted, with its stylus, away from the record. The liftingrod 2O and its parts, it will be seen, are carried by and supported from the post 5, so that they form a part of the attachment, and thus when the post is putin place upon the graphephone the shifting or lifting mechanism is brought into proper operative relation to the lifting-lug 18. Hence the attachment is complete in itself and after being put in place it is only necessary to attach the sound-box and the funnel or ear-tubes thereto to prepare the machine for operation.

The specific construction and arrangement shown and described may be modified and any suitable materials and proportions may be used for the various parts Without departing from the spirit of the invention, the construction being essentially an attachment for holding the boX above the record and carrying the lifting mechanism.

When a sound-box having a cross-pin is used, the -pivoted tube 9 has its outer end reduced in exterior diameter to fit into the free end of the tube of the box, and this reduced portion is slotted longitudinally to receive the cross-pin in the usual manner.

What is claimed is- V 1. A sound-box support comprising a hollow post, atubular head at the upper end of the post and lying at right angles thereto, a tube having an enlarged curvilinear end vmounted in one end of the head, a reciprocatory rod within the post, said pest having slots therein, and arms passed through the slots and engaged with the rod, the upper arm having its outer end bent upwardly and engaged with the pivoted tube and the lower arm having its outer end bent downwardly for engagement to Ilift the rod and raise the pivoted tube.

2. An attachment for grap'hophones coinprisi-ng a supporting-post a sound-tube pivotally connected with the post and adapted for the connection of a sound-'box thereto, said post bei ug adapted for attach ment to the feedcarriage of a graphophone, and a reciprocatory rod mounted in the post and having its ends projected therefrom and positioned to engage said sound-tube and the lifting-lug of the carriage respectively when the attachment is in operative posi-tion.

In testimony that I claim the foregoing as my own l have hereto affixed my signature in the presence of two witnesses.

CHARLES BURKHART.

Witnesses:

W. T. SHIELDs, W. H. STEPHENS.

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