US799122A - Phonograph. - Google Patents

Description

No. 799,122. PATENTED SEPT. 12, 1905. G. WEBSTER.

PHONOGRAPH. APPLICATION FILED APB.12,1904.

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N0- 799,l22. PATENTED SEPT. 12, 1905. G. WEBSTER. PHONOGRAPH.

APPLICATION TILED APK.12.1904.

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Mm i 6%. V4. Jul/J GEORGE WEBSTER, OF CHRISTIANA, PENNSYLVANIA.

PHONOGRAPH.

Specification of Letters Patent.

Patented Sept. 12, 1905.

Application filed April 12, 1904. Serial No. 202,758.

To all w/tont it 71mg, concern:

Be itknown that I, GEORGE \Vnasrnn, a citizen of the United States, residing at Christiana, in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in Phonographs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, of which Figure 1 is a plan view of as much of an Edison phonograph as is necessary to illustrate my invention, which is shown applied thereto. Fig. 2 is a section on line Fig. 1. Fig. 3 is a view similar to Fig. 2, but showing the cam on the worm-shaft in the position of having just elevated the arm which carries the reproducing devices and the lower end of the rod carried thereby in engagement with the screw-thread of said worm-shaft. Fig. 4: is a section on line y y, Fig. 1. Fig. 5 is a detail of the lower end of the arm 13 and the rod 12 carried thereby, showing the lower end of the latter in engagement with the shorter slot in said arm. Fig. 6 is a similar view to Fig. 5, but showing the rod 12 rotated to engage the longer slot of the arm 13.

The object of this invention is to provide a simple and eiiicient device for phonographs whereby the record may be readily caused to be repeated in whole or in part.

The invention resides in a novel combination of mechanism, as hereinafter described and particularly pointed out.

In the accompanyingdrawings I have shown my invention as applied to the well-known Edison type of phonograph. 1 is the driven shaft of such machine, having the screwthreaded portion 1, which shaft carries the cylinder 2, that receives the record-cylinder 3. 4 is the rock-sleeve that carries the arm 6, upon the free end of which within the annular opening 6 is the usual reproducing device. (Not shown.) The rock-sleeve 1 is adapted to slide on the usual guide-bar 5 and also carries the arm 7, having a partial screwthread on the under side of its free end to engage the screw-thread part of shaft 1.

In carrying out my invention I mount upon the shaft 1 a gear 8 and journal in the frame of the machine a shaft 9 parallel with and opposite the cylinder 2 and having a screwthread 9 and a gear 10 engaging the gear 8. Shaft 9 has secured thereto a cam 11, whose function will hereinafter appear. For convenience the shaft 1 will be referred to as the main shaft and shaft 9 as the repeatershaft.

Connected to the arm 6 is a rod 12, that passes freely through an arm 13, that is fixed to arm 6. The lower end of this red is bent to form a limb 12, that projects through an end slot 14 in the bar, and the free end 12 of said limb is upturned and is adapted at a predetermined point in the advance movement of arm 6 to engage the screw-thread of the repeater-shaft 9, as and for a purpose hereinafter explained. In the present instance the upper end of said rod is pressed upwardly by a flat spring 15, that is fastened to the extension 6 of arm 6, the rod passing freely through the spring and a pin 16 being driven transversely through the end of the rod projecting beyond the spring. This spring serves to maintain the limb 12 of the rod against the upper wall of the slot 14:, yet permitting a slight yielding of said rod under certain conditions hereinafter explained. The arm 13 has a projection or, preferably, a small roller 17, against which at a certain time in the outward movement or advance of the arm 6 the before-mentioned cam 11 is adapted to impinge and force upwardly said arm 13, and consequently the rod 12 and arm 6.

A plate 18 is mounted on a rock-shaft 19, pivoted to lugs or projections 20 of the frame of the machine. The tendency of this plate by reason of its gravity is to bear against a horizontal bar 21 of the machine-frame, which bar forms a stop for limiting the movement of the plate in that direction, as seen in Fig. 3. The inner end of this plate has an outwardly-inclined or cam projection 22. Then the arm 6 is raised, (at which time the soundreproducing device carried thereby is out of engagement with the record 3 on cylinder 2 and the screw-threaded portion of arm 7 is also out of engagement with the screw-thread 1 of shaft 1,) the upper edge or end of the vertical part of plate 18 will take under the end of arm 6, while the outwardly-inclined or cam projection 22 will extend beyond the line of said end of the arm, as clearly seen in Fig. 3. \Vhen, however, the arm 6 is in position in which the reproducing device is in engagement with the record, the said plate will 00- cupy the position shown in Fig. 2, ready to drop to the position of Fig. 3 as soon as the arm 6 is again raised.

Having described the construction of my invention, (omitting details relating to certain adjustments hereinafter described,) Iproceed to explain the mode of operation thereof as follows: When the arms 6 and 7 are advancing and the reproduction of a record is taking place, the free end 6 of the bar 6 is sliding upon the frame-bar 21, as in Figs. 1 and 2, at which time the upturned end 12 of the limb 12 of rod 12 is out of engagement with the thread of the repeater-shaft and the plate 18 is in the outward position. As seen in Fig. 2, the arm 6 has arrived at a point in its advance movement when the roller 17 of arm 13 is brought opposite the cam 11 on the repeatershaft. As the latter continues its rotation said cam will contact with the roller, and so force up the arm 13, thereby carrying the upturned end of the rod 12 into engagement with the screw-thread of the repeater-shaft and at the same time raising the arm 6, and so carrying the reproducing device out of contact with the record as also the arm7out of the thread of the rotating shaft 1. The raising of the arm 6 permits plate 18 to drop back by its gravity against the bar 21 and the upper edge to take under the end of said arm, as in Fig. 3. -The end of rod 12 being in the thread of the repeater-shaft and the latter rotating in a direction opposite to that of the main shaft and the free end of arm 6 now resting upon the plate 18 and sliding on the top edge of the latter will be caused to travel back until it finally passes ofi. the said edge and drops against the cam projection 22, thus forcing the plate to the outward position, the arm 6 finally resting upon the bar 21, as in Fig. 2. The descent of said arm 6 disengaging the upturned end of rod 12 from the screw-thread of the repeater-shaft and at the same time engaging the screw-thread portion of arm 7 with the complementary portion of shaft 1 and the reproducing device with the record-cylinder 3, the machine proceeds in the usual way until cam 11 again throws up the arm 6, as before. If it should happen that when the latter movement takes place the upturned end of rod 12 'be not in position to instantly enter the screwthread of the repeater-shaft, it will be held against the plane surface of the latter until the screw-thread comes in line with said end of the rod, when the latter will be carried into the thread by the stress of the spring 15.

It is sometimes desirable to repeat only a part of the record. To do this I provide two adjustments, one of which for,so to say, cutting out the first part of the record and the other the end portion thereof. To effect the former, I make the plate 18 longitudinally adjustable, which is done by making it slidable upon the rock-shaft 19 and using a set-screw 23 to lock it in the proper position to which itis adjusted. To effect the second adjustment, I secure the cam 11 adjustably to the repeater-shaft by v mounting said cam on a sleeve 24, Figs. '1 and 4, that is longitudinally slidable upon said shaft and fixable at any point, said sleeve having a slot 25, through which passes a bindingscrew 26, that is screwed into said shaft.

I remark that it is not absolutely essential that the rod 12 be used, although much preferable, as a yielding projection from the arm 13 could be provided to engage the screwthread of the repeater-shaft at the required time that is, when said arm 13 is elevated by the cam 11 on said shaft. An advantage, however, in using said rod 12 results from the following arrangement: As in the present instance a portion of the limb 12 of rod 12 extends beneath the re-peater-shaft and it being sometimes necessary to throwback the arm 6 or if it be desired that the end 12 shall not engage the thread of the repeater-shaft when the arms 13 and 6 are elevated by the cam 11 I make in the end of the arm 13 a slot 27 shorter than slot 14 and at right angles thereto, as seen in Figs. 5 and 6. By pressing down the rod 12, the spring 15 permitting it to yield sufficiently to carry limb 12 below slot 14, and giving the rod a quarter-turn and then releasing the pressure the said limb 12 entering the slot 27 will then be out of line with the repeater-shaft and will be maintained in that position.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a phonograph, the combination with the rotatable record-carrying shaft, and the arm carrying the reproducing device, the screw-threaded repeater-shaft geared with the first-mentioned shaft, the rod connected to said arm and adapted to engage the screw-thread of the repeater-shaft; the cam on the latter shaft adapted to engage a projection on said arm and to elevate the latter at a predetermined point in its advance movementythe rock-plate adapted to engage under said arm when the latter is elevated by said cam, and

having the end cam incline whereby said arm is caused to automatically throw said plate out of said engaging position at a predetermined point, substantially as set forth.

2. In a phonograph, the combination with the rotatable record-carrying shaft and the arm carrying the reproducing device, of the screwthreaded repeater-shaft geared with the first-mentioned shaft, said arm having a part adapted to engage the screw-thread of the repeater-shaft; the cam on the latter shaft adapted to engage a projection on said arm, and to elevate the latter at a predetermined point, the plate adapted to automatically engage under said arm when the latter is elevated by said cam, means for automatically throwng said plate out of said engaging position at a predetermined point,together with means for effecting adjustments of said cam longitudinally of the repeater-shaft, substantially as set forth.

3. In a phonograph, the combination with the rotatable record-carrying shaft and the arm carrying the reproducing device, ofthe predetermined point, together with means for effecting longitudinal adjustments of said plate, substantially as set forth.

In testimony whereof I have hereunto affixed my signature this 6th day of April, A. I). 5

screw-th readed repeater-shaft geared with the first mentioned shaft, said arm having a part adapted to engage the screw-thread of the repeater-shaftg the cam on the latter shaft adapted to engage a projection of said arm, and to elevate the latter at a predetermined point, 1904. 7 the plate adapted to automatically engage un- (7% EORGE \VEBSTER. der said arm When the latter is elevated by \Vitnesses:

J A.- I'IARRAR, J. D. HARRAR.

said cam, means for automatically throwing said plate out of sand engagmg posit1on at a

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