US1259916A - Attachment for talking-machines. - Google Patents

Description

W. A. SHARP. ATTACHMENT FOR TALKING MACHINES.

APPLICATION {FILED MAY I4. I91?- 1,259,91 6. Patented Mar. 19, 1918.

2 SHEETS-SHEET I.

W. A. SHARP.

ATTACHMENT ran mxme mcumzs.

APPLICATION ELLED ILY 14. I911- 19, 191& 2 SHEETHHEET z.

Patented UNITED STATES PATENT OFFICE.

WILLIAM ATWOOD SHARE; OF DES MOINES, IOWA.

' ATTACHMENT FOR TALKING-MACHINES.-

To all whom it may concern j Be it known that 1, lVILLiAM ATwoon SHARP, a citizen of the United States, and resident of Des Moines, in the county of Polk and State of Iowa, have invented a certain new and useful Attachment forTalking- Machines, of-which the following is a specification.

The object of my invention is to provide an attachment for talking machines, adapted to automatically lift the-needle when the phonograph arm reaches one position of its movement, and automatically return the arm to its opposite movement and drop the needle again to position for engaging the record.

More particularly it is my ob ect to provide means carried by a phonograph tone arm adapted when the record has been played to automatically operate for lifting the sound box, and the needle carried thereby, and then to swing the tone arm back to its starting position, and when the arm has reached such position to gentlv lower the sound box for lowering'the needle to operative position.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of the devicewhereby the obiects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanylng drawings,

2 in which Figure 1 shows a top or plan view of a phonograph tone arm with the sound box .thereon, the device being quipped with an attachment embodying my invention.

Fig. 2 shows a side elevation of the same, part of the case for th'e'operating mechanism being removed.

Fig. 3 shows a vertical, sectional viewtaken on the line 3-3 of Fig. 4.

Fig. 4 shows an inverted horizontal, sectional view taken on the line 4-4 of Fig. 3.

Fig. 5 shows a transverse, vertical. sectional view taken on the line 55 of F ig. 1.

Fig. 6 shows a vertical, sectional view taken on the line 6-6 of Fig. 5.

Fig. 7 shows a front elevation of part of the mechanism.

Fig. 8 shows a detail view of part of the device, and

Fig. 9 shows a detail, sectional View of the device shown in Fig. 8.

In the accompanying drawings, I have Patented Mar. 19, 1918.

Application filed May 14, 1917. Serial N 0. 168,617.

I shall call the rear Wall of the casing, nd

suitably held in position by screw-bolts 18 extended through the opposite walls of the casing.

Mounted on the the frame 17 within the casing wall is a second frame 19. Mounted in the frames 17 andlt) is a shaft 20. On the shaft 20 is rotatably but nonslidably mounted a gear 21, adjacent to which is aratchet wheel 22 fixed on the shaft 20. On the gear 21 is a spring pawl 23, the free end of which is held in yielding engagement with the ratchet wheel 22. v

A shaft 24 is mounted in the frame members 17 and 19.

On the shaft 24 is a small gear 25 which meshes with the gear 21.

Fixed on the shaft 24 are spaced annular disks 26 and 27 which are .connectcd by rods or pins 28 spaced from the site sides thereof inwardly from the periphcry of said disks. On the periphery of the disk 27 are opposite lugs 30 arranged quartcring with relation to the lugs 29. The disk 27 has gear teeth 27.

The shaft 20 projects through the casing member '15 and is designed to receive on its outer end a key 31. Outside the casing, a

shaft 20, on oppocoil spring 32 has one end fixed to the easing member 15 and the other end fixed to the shaft 20. By means of the key, the shaft 20 can be rotated for winding up the spring 32 and the pawl and ratchet are so arranged as to prevent the rotation of the gear 21 against the spring tension, except when the shaft is given rotation.

Extended transversely through suitable openings in the walls of the casing is a bar 33. adapted to slide longitudinally. The bar bolts 18 aiid spaced from 33 has at its end. farthest from the casing 15, a downwardly extending arm 34. The bar 33 is provided on its upper surface within the casing with lugs 35 and 35. The lug 35 is so arranged that in one position of while in another position of the bar 33, the

lug is in the path of the lugs 30.

Suitably supported adjacent to the lower end of the arm 3i is a stop device comprising an inverted U-shaped bracket 35*. The upper bar or crossmernber of the bracket 35 is beveled at its side edges, as shown in Fig. 9. Below said bar is a spring 36 adapt-- ed to press upwardly toward said bar.

Mounted on the upper bar of the bracket 35 is a pair of adjustable supports, each of said arms comprising a horizontal member 37, resting on top of said barhaving at its ends downwardly inclined members 38 and 39 adapted to engage the beveled edges of said bar.

At "the lower end 'of the member 38 is a lateralIy p rojecting arm 40 extending in the 'path of movement of the arm 3%. At the lower end of the arm 39 is a laterally protecting arm 41, between the spring 36 and the horizontal bar of the bracket 35*, and

spaced from the member 37 a distance greater than the thickness of said bar.

The spring 36 engages the members 41 of the adjustable engaging arms, and tends to normally hold said adjustable engaging arms in their raised positions where the members 37 and 39 frictionally engage the beveled ec ges of the bracket 35" lVhen it is desired to adjust said adjust able arms longitudinally of the members 35. the operator presses downwardly on the member 3'? against the pressure of the spring 36, until the members 38 and 39 are free from frictional engagement with the bracket 35", and slides the adjustable en gaging arms longitudinally on said bracket.

Pivoted to the lower portion of the frame- 17 on the side thereof adjacent to the free end of the tonearm 10, is a lever 44, which.

extends from its pivot above and across the arm 33 between the dislrs 2t and 2'? toward the pivoted end of the tone arm 10, as illustrated in Fig. 7.

Pivotcd to what might be called the rear ward end of the lever 4-4 is a slightly curved link 45. extending i'ipwardlv and through a suitable opening in the casing 15.

Fixed to the frame 4-6. which assists in sesame 52 is secured to the upper end of an arm 43 which extends away from the clamp device 41 on the member 12.

The lever all is provided on its up ier surface with a hook member 53, such as t at shown in Fig. 6, and for a purpose hereinaftermentioned.

Suitably mounted on the frame members 17 and 19 is a shaft 54, on which is mounted a gear 55 in mesh with the gear 27. On the shaft 54 is a gear meshing with the gear 57, as shown in dotted lines in Fig. 6, on the shaft 58 similarly shown in the same figure Fixed to the casing member 50, and mounted'on the shaft 58 to permit the rotation of the shaft 58, is a casing member Fixed on the shaft 58 adjacent to the gear 57 is a disk 60 to which is pivoted a spring pawl 61 adapted to coaet with the gear all Pivotally mounted on the disk 60 are brake shoes 62 on which are weighted arms 63.

The brake shoes 62 of their positions to en wall 65 of the casing Secured to each brake she disk 60 is a spring 6e adag i hold the brake shoes away In the practical eperati device, I will assume the position shown in that the tone arm is in its swinging me where the needle 1 i the disk toward position uh is above the disk nea its per lt will of course be under opwation of the device is su antially same Where a machine is used in which needle is moved from the c'cr to ti riphery of the disk in pl:

As the tone arm 10 swings l ti'on, shown in Fig. toward on the spring 48.

The tone arm will have some momentum in its swinging movement, and when the arm 01 strikes the member ill, the bar gear 21, the gear and the die 27 The in; 35* will more into t of the lugs 30.

As the disks .26 and Q7 rotate, the lower pin 28 will enter the not ch formed adjacent to the hook or catch member tendii'ig to swing the arm l-l. upwardly. Tl of the sound box will also move the swinglug arm 44 upwardly as soon as the lower pin 28 moves upwardly;

The rotation of the dish 2% im 1 3 tion to the disk 60 and the centrixugai force I of the weighted arms 63 will move the brake to the gear 57. )10

It should be mentioned in this connection that the gear 57 is wide enough to permit it to engage the pawl 61 and also to engage the gear 56.

After the disks 26 and 27 have moved a quarter revolution, one of the lugs 30 will engage the lug 35*. The record will then be played until the tone arm swings toward the left, and until the member 34 engages the other member 40, at which time the bar 33 will be moved toward theiright with relation to the tone arm, moving the lug 35 out. of the path of the lugs 30, and moving the lug 35 into the pathof the lugs 29. Another quarter revolution will be imparted to the disks 26 and 27. At the beginning of this quarter revolution, the pin 28 leaves the hook member 53, which has been raised suflieiently to allow it to clear the pin 28, and as the quarter revolution continues the other pin 28 will engage the arm 44 forcing it downwardly and thereby raising the sound box 13, and also imposing greater tension on the spring 48. This tension will tend once more to swing the tone arm 10 toward position where the sound box and needle are above the record near its periphery.

The spring 32 should be wound up at proper times to keep it under tension during the operation of the machine.

It will be seen that the brake shoes, hereinbefore described, with the weighted arms thereon, and the parts connected therewith, serve as a brake or cushioning device for preventing the sudden operation of the machine, and preventingjar or undue vibration of the parts of the mechanism.

The device is a comparatively simple construction, and is so 'made that it may be mounted ,as an attachment on a phonograph.

Some changes may be made in the construction and arrangement of the parts of my improved device without departing from the essential purposes of my invention, and it is my intention to cover by the claims of the patent. to be issued upon my application, any modified forms of structure or use oi mechanical equivalents, which may be reasonably included within the scope of my claims.

I claim as my invention:

1. In a device of the class described, a swinging tone arm, a sound box pivotally mounted thereon, means for raising and lowering said sound box and for swinging said tone arm onits pivot, said means inmounted thereon, means for raisin lowering said sound box and for swinging eluding a spring, a motor device, a-flexible member connected with said sound box, a pivoted lever connected with said flexible device and said spring, means actuated by said motor device for moving said lever for increasing the tension of said spring and movin said flexible device for raising said sound ox.

2. In a device of the class described, a swinging tone arm, a sound box pivotally and said tone arm on its pivot, said means including a spring, a motor device, a flexible member connected with said sound box, a

pivoted lever connected with said flexible device and said spring, means actuated by said motor device for moving said lever for increasing the tension of-said spring and moving said flexible device for raising said sound box, and means for rendering said flexible device operative when the tone arm reaches one position of its movement, and for making it inoperative when the tone arm reaches another position of its movement.

3. In a device of the class described, a swinging tone'arm, a sound box pivotally supported thereon, a yielding device oper atively connected with .said tone arm for tending to swing the tone arm to one position of its-movement, a motor device, means including a spring motor for simultaneously raising said sound box and increasing the tension of said yielding device, means for intermittently operatively connecting said last means with said motor device, and a centrifugal brake operatively connected with said motor for regulating its action.

4. In a device of the class described, a swinging tone arm, a sound box pivotally supported thereon, a spring device operatively connected with said tonearm and adapted to swing said tone arm to a certain p( s1tion of its movement, means, for

raising said sound box and for increasing a lever pivotally supported on said'arm, a

yielding device connected with said lever and with a fixed support, meanssfor operatively connecting said lever with said "pivoted sound box, the parts being so arranged that when said leveris in one position the gg rea ers tension on said yielding device is increased and the sound box lowered, said means inand said sound box is raised, and when the eluding asIidable bar carried by said arm, lever is in another position such tension is having projecting member, and adjustabie lowered and the sound box is lowered, means devices arranged to stand in difi'erent posi- 25 5 for moving said lever to the first (if-said tions in the path of said member.

positions, a slidable bar carried by said 7 in a device of the class described, the tone arm and adapted in certain positions combination of a swinging phonograph arm to render said last means inoperative, and having a sound box pivoted thereon with in other positions to permit said last means means whereby when said arm reaches one 30 10 to operate, adjustable means for limiting position of its movement said sound box is the movement of said bar when saidtone lifted, said arm is swung to another posiarm swings, for thereby limiting the swingtion and the sound box lowered said means ing movement of the tone arm and also for including a slidable bar carried by said arm, moving said slidable bar to its different having a projecting member, and means for 35 15 positions. limiting the movement or" said member come 6. In a device of the class described, the prising a bar, stop devices slidahly mounted combination of aswinging phonographprm thereon, and means for normally, yieldingly having a sound box pivoted thereon, with looking said stop devices on said bar in the means whereby when said arm reaches one popath of movement of said member. 20 sition of its movement said sound box is-lift- Des Moines, Iowa, May 11, 1917.

ed, said arm is swung to another position zl/TLLLUVJC ATl VOOD SHARP.

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