US1345397A - Brake for phonographs - Google Patents

Description

A. E. PARNALL.

BRAKE FOR PHONOGRAPHS.

APPLlCATION FILED AUG-2i. 1917.

1,345,397. atent d July 6, 1920.v

UNITED STATES m cr r.u'r OFFICE.

ARCHIE E; PAM-TALL 256 LZ SSi NOR To FRANK W. WILLIAMS, Y GHI LLINOIS. p y

' "BRAKE, non rnonoennrns. l

Specifieation of Letters Patent. Patent d J ly 1920 Application filed August 21, 1917. Serial No. 187,391.

To all whom. it may concern."

Be it known that I, ARCH E E. Pl RNAnn, a citizen of the United States, and a residentof the city of Chicago,in the county of Cook and State ofIllinois,'jhaveinvented certain new and useful Improvem nts in Brakes for Phonographs; and I do hereby' declaretha-t the following is a full, clear,

and exact description of thesame, reference beni had to the accompanying draw ngs,

and to the numerals of reference marked part of-this specitica thereon, which form a t1on..

This invention relates to improved said disk to a standstill after-the playing of a record. V

lt is also an object .of this invention to provide a :brake mechanism adapted to 1 secured upon the upper ,reduced and projectsimultaneously contact the governor and record plate of ,aphonograph to bring the same torest after the playing of a record.

It is a further object of this invention to provide a phonograph brake mechanism embracing a plurality of brakes adapted ,to 'be manually actuated to simultaneously contact the phonograph governor and record' disktobring-thc same to a sudden stop after the playing .of a record.

It is. furthermore an object of this invention to provide a plurality of brake meme bers operatively connected to a constant speed control lever which may be shifted to simultaneously move said brake members into frictional engagement with in hone; graph record carrying diskand Wlth a governor disk to bring .the operating imeha nisms of aphonograph to a s'uddenst'op.

It isan important objectof this invention to provide aphonograph brake mechanism adapted to frictionally contact aiplurality' of operating parts of a phonograph. to bring said parts to rest within a very short time aftenthe playing of arecord.

.Qther and further important objects of this invention will be apparent from the disclosures in the drawings and specification. The invention (in a preferred form) is illustrated in the drawings and hereinafter more fullydescribed. Y On the drawings I F1 ure 1 is a top plan View of a phono :grap with the record carrying disk partly broken away to show a brake mechanism embodying the, principles .of this invention.

Fig. 21s a View taken on line 2--2of Fig.

1, with thecasing parts omitted to show thei Working mechanisms;

Fig; 3 is an enlarged detailed section taken on, line of-FigL 1, with parts omi ted and broken away and With parts shown in elevation.

Fig. 4:. is a bottom .plan detail view of the record disk brake lever.

Fig. 5 isa section taken on line Fig. 1.

Fig. 6 1s an enlarged detail section taken on linc.6.-6,of Fig.. l.' i v 7 As shown .011 the drawings T1 1e reference numeral 1, indicates the top board of a'phonograph case,: having rota-tably mounted thereabove in the. usual manner, a record carrying disk or plate .2,

ing end-of a vertical driving shaft 3, which 18 11 6 to P oject n rally th u th top board 1. The driving mechanisms ,are

mounted within .a framework which is rig idly secured by s c reyvsvor anyother suitable means ,to the inner or under surface of the top board Land compr ses an upper frame plate .5 and a lower :franie plate 5, spewed to receive retaining screws 7, for holding a the lower frame p he 5, in position. The driving shaft .3, is journaled the frame plates 4 and 5, andhas.a.portion;thereof i n1 mediately'above the reduced lower journaled endthereof formed to provide an integral pinion 8. The shaft pinion 8, meshes with a gear 9, rotatably mounted upon a stub shaft secured to the lovverfraine plate 5.

Also mounted uponsaid stub shaft and ri idly securedv to theupperflsurfaceof t e gear 9, is a pinion 1,0, which is adapted .to

rotate with said gear 9, and meshes ith a large gearflbase platell, which forms the is secured to the frame plate '4, while the other end is free, thus affording an arrangement whereby the crank shaft 14, may be rodirection. The outer end of the crank shaft tated in one direction only, a rotation in the opposite direction tending to force the spring to wind tightly on the crank shaft to. lock the same against rotationin that isof course positioned to permit a handle (not shown) to'be secured theretoforwindg ing up the motorf It will of course be .un-V derstood that an "electric or any other suitable type of motor may be'usedfif' desired'in 7 place of the motor described.

Keyed or rigidly secured byother suitable means upon the vertical driving shaft 3, is a worm wheel or gear 17, which meshes with .a worm'formed on the inner end of a countershaft 18, journaled in suitable supporting brackets 19, formed or secured upon the under surface of the top frameplate 4. The speed of rotation of the countershaft 18, is controlled by a centrifugal governor mechanism of a familiar type, comprising weights 20, secured onspring arms 21,. the inner end of each of which is secured to a drum wheel rigidly secured on'the countershaft 18', to the outside of the worm thereof.

The outer end of each of the springarms 21,

' is secured to the hub of a 'slidablefriction disk 22, which is adapted to be drawn inwardly, as the speed of the countershaftincreases, due to the movement of the weights 20, outwardly away from thecountershaft by centrifugal force. A friction brake is provided to bear against the inner surface of said'friction disk 22, of the governor mechanism, and comprises a rubber contact head or brake shoe 23, secured upon the lower end of an arm 24, which extends upwardly through a suitable slot formed in the upper frame plate 4, and has the upper end "thereof secured at right anglesto one edge of ahorizontal lever 25, one end of which is pivotally secured by a pivot 25, upon a boss formed upon the top frame "plate '4.- The other end of the lever 25, is bent up wardly'at right angles to form a finger 26, which projects through an opening or aperture 27, formed in phonograph casing. Disposed horizontally'above theto board 1,and below the record carryingdisc 2, is a speed [regulating arm or starting lever '28,

the inner end ofwhich is apertured to en gage over the upper projecting end of the the top boardl', of the or link 30, to whichthe'lever 28, is pivotally connected ata point 31, a short distance from its inner end. Formed integrally on one side of the lever 28, near the outer end thereof is an indicator or finger piece 32,

adapted to contact the periphery of a cam' shaped speed regulating dial plate 33, which may be manually rotated or adjusted .by means of a knurled'stem 34, for regulating the speed of rotationof-the record carrying disk 2. Also pivotally connectedto the lever 28, between theipoint 31,-and the indicator 32, is an angled member or bell-crank comprising an-arm 35, on the outer end of which is integrally formed at an angle thereto, a'

short arm36, having a longitudinalslot 37,

therein, into which projects a detent or projection 38, formed on the under surface at one .end of a link or small'plate 39,*the other end of which is depressed and rigidly securedupon the top board 1, as shown in Fig. 1. Secured upon theangled member at the junction of the arms 35 and 36, is a friction drum or cylindrical brake shoe 40, covered with rubber and disposed to contact the 'periphery of the record carrying disk 2, when the starting lever 28, is in its normal position as shown in full lines in Fig; 1.

The operation is as follows:

lVhen it is desired to use the phonograph, the motor is wound up by turning the crank shaft 14, by its handle, thereby rotatingthe sprocketwheel thereon, which in turn r0 tates the winding gear" 13, and the motor shaft, thus winding the motor spring." In

the normal position of the starting lever 28, i

as shown in Fig. 1, the brake shoe 23, 'contacts the friction disk 22,'of the governor,

and the brake 'shoe 40, is in contact with the periphery of the record carrying disk/2, thus holding the di'skdriving motor mechanisms stationary. To start the, phonograph, the cam regulating dial 33, is first manually set by means of its stem handle 34, sothat the indicator 32, is disposed opposite the mark on said dial for the desired rate of 7 speed, and as shown in Fig. 1, said'dial-is set for'the maximum. speed of 105 revolu-.

tions per minute. The outer end'of the'startmglever 28, is now shiftedin the "slot of dotted lines in Fig. 1. By the operation of the starting lever 28, the arms 35 and 36, are

moved or swung outwardly, thus *moving the brake shoe out of'contact-with the record carrymg disk .2, and also simultaneously moving the inner 'apertured'end'of the tion of the gear 11, the pinion 10, and the gear 9, are rotated, thereby rotating the vertical driving shaft 3, and the record carrying disk 2. The worm wheel 17, on the shaft 3, is also rotated, and being in mesh with the worm on the countershaft 18, rotates, the same and with it the overnor mechanisms mounted thereon. exerted upon the governor weights, forces" the same away from the countershaft, thereby drawing the governor friction disk 22, in-

wardly against the governor brake shoe 23,

which is made of rubber or other suitable mar terial to insure a smooth noiseless operation.

The brake shoe thus limitsthe inward move-- ment of the disk 22, and consequently permits the record carrying disk 2, to rotate only at a constant speed, as indicated on the cam dial 83. 7

To stop the operating mechanisms of'the phonograph,the starting lever 28, after the playing of a record, may be moved into its normal position, thus simultaneously moving the brake shoe 40, into frictional'engagement with the periphery of the record carrying disk 2, and the brake shoe .23, moves outwardly against the governor friction disk 22, forcing the same outwardly into itsv normahposition, the friction of said brake shoes preventing further operation of the phonograph mechanisms, and provides a means for bringing the record carrying disk 2, to a stop within a very shorttime, and without noise. l l

It will of course be understood that any type of motor may be used and that the brake shoes maybe otherwise arranged to frictionally contact the operating parts of the phonograph to bring said parts-to rest.

The centrifugal force I am aware that numerous other details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted other- I wise than necessitated by theprior art.

' I' claim as my invention: 1. The combination with the record playing disk and governor disk of a phonograph,

of a pivotally mounted lever, a downwardly projecting arm integrally formed thereon, a v

brake shoe on the end of said arm disposed adjacent said governor disk, a starting lever connected with said first mentioned lever, means pivotally supporting the starting lever, an angled lever pivotally connected to said starting lever, a brake shoe thereon disposed to the outsideof the periphery of said record playing disk, guide means for said angled'lever, and slotted means sup porting the outer end of said starting lever and permitting a shifting movement thereof to simultaneously actuate said first mentioned lever and said angled lever to move said brake shoes into frictional engagement with said respective governor disk and record playing disk to bring. the same to a sudden'stop.

2. The combination with the rotatable:

governor disk of a phonograph, of a pivotally mounted angled member, an arm integral therewith, a brake shoe thereon disposed adjacent said governor disk, an apertured actuating lever for receiving the integral end of said angled member projected therethrough, means pivotally supporting the actuating lever between the ends thereof, said actuating lever adapted when moved into normal position to shift said angled" member to move said brake shoe into frictional engagement with said governor'disk,

to bring the same to a quick stop.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses. l

V ARCHIE E. PARNALL.

I Witnesses:

' CHARLES W. HILLS, J r., FRANK W. WILLIAMS;

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