US1446201A - Phonograph motor - Google Patents

Description

Feb. 20, 1923. j l,446.201l

L. D. NADEL PHONOGRAPH MOTOR Filed May s, 1919A 5 sheets-sheet 2 Feb. zo

L'.. D. NADEL PHONOGRAPH MOTOR Filed May e, 1919 .that a.;

ipiiazi PRES COT-ill.'

among` other features, improved transmission of powen improved supporting means, and improved spring spindle.

In the drawings accompanying this speciication and 'forming a part thereof i have disclosed, for, purpose ol `iillustration9 one embodiment whichmy invention may sume. ln these drawings:

Figure 1 represents top `pla-n view ot a phonograph motor embodying this illustrative form of my invention;

Figure 2 represents a side elevation of. this motor. f

FigureS-represents a bottom view or" the motor; and l y Figure l is ardetail showing the `construction of my spring spindle.

vlin these drawings l have omitted for salte of clearness the entire phonograph cabinet and associated parts, and l have also omitted many parts of the motor which are `not a part oi my invention and accordingly would confuse the drawings and in no way in understanding my invention. v

rlhe entire phonograph motor shown as mounted on a 'frame 11 `which preferably consists'ot a lat top plate 12 having numerous depending lugs, two oi? which, 134 and 14:, serve to support a fixed shalt 15. Mounted on this sha-'jt 15 is a gear 16 having integral therewith a` winding spindle 17 extent ing along the sha-ft 15. Starting at a point on the shaft 15 near the tree end of the spindle 17 is a drivespindle or drive shaft 18 rotatably mounted on the shalt 15 and having integral herewith a spiral drive gear 19. Mounted about the spindles 17 and 18 aretwo spring drums 2O and/21 each open at the end adjacent the other,` and closed at the remote end. The remote end ofthe drum 20 is provided with a sleeve 22 which encircles the winding spindle 17 and acts as a bearing by means of which the drum 20 may rotate on the spindle 17.

'surface ol' the drum 20.

SerialNO. 295,631. i

r11 l v 4 i i remoteend oi the drum 2i is provided win a similar sleeve23 encircling the drive spindle 18 to provide for the rotation or thedrum 21 on ythat spindle. Between the adjacent f ends of these drums 2O andl21 is placed a disk 24- provided with a beveled opening 25 `which closely `tits the shaft 15 between the adjacent and correspondingly hefeled ends ot the spindles 17 and 18. rllhe drums 20 and 2l and the disk 24 are rigidly secured together by means of serews 25 and rotate as a unit upon the shaft 15 and associated parts. hlounted between the spindle 17 and the drum 20 is afcoil spring 57 having its inner end secured to the spindle 17 and its outer end secured to theinner A similar spring 58 is mounted in the same way between the spindle 18 and the kdrum 21.

Particularly in Figure l, l have illusvtrated the means which l prefer to einpl'oy in securing the inner end oi the spring to the spindle, and have shown myv securing means applied to the winding'spindle 17 and the spring 57. The `spindle 17 is provided with Va vliattened portion 26 from which rises a rivet 27 functioning to secure the inner end of the spring to the spindle, the spring being annealedto prevent Abrealfingthereof Aat the corner where the dattened portion oi they spindle merges into the cylindrical surface thereof. This rivet 27 -is provided with a head 29 so termed as to lie along the cylindrical periphery ot the spindle `17 and thus form with the body of the spindle a circular drum on which the succeeding coils of the spring are wound.

ll/leshing with the gear 16 .l have shown a gear 30 mounted on a winding` shaft 3l extending beyond. the side ot the trame 11 and formed interiorly with the `usual screw rthreads for engagement by a detachable winding handle. The customary ratchet mechanis 32is provided to prevent retrograde movement of the winding shalt.

l have'illustrated a turntalide shalt mounted vertically in -suitable bearings in the traine 11 and so posi loned that the axis thereof intersects ythe axis -of the winding shaft 31. Means are provided to transmit the power from the drive shalt to the turntahle shaft in a highly etticient manner and without appreciable noise, such means being herein shown as. an intermediate shaft operatively connected to each 'ot the other approximately 450.Y mediate shaft with the drive shaitl is a means for transmitting rotation trom the shafts. I have illustrated this intermediate shaft 35 inountedin lugs 36 and 37 depending from the under surface ot the 1iframe 11 `and supported at a substantial angle'y to loothy the power shaft and the turntable shaft;` andY inl this particular embodiment Y1 have tound it convenient to make each angie Connecting the' interdrive shaft to the intermediate shaft., which is herein disclosed as a gear 19 mounted on the drive 'sha-tt 18, preterablyspirally out,

'and meshing with a coi-operating pinion 34 mounted on the intermediate shait l have also provided means 'to-r connecting the intermediate shaft with the turntable shaft and this means is herein shown as a `gear38 mounted on the intermediate shaft 35, preferably spiralhly. cut, and engaging with a oo-o erating inion 59 secured to the turntable shait.

The gear and pinion connecting the po-wer shaift and the intermediate shaiit and the gear and pinion connecting the intermediate shaft and the turntable shaft have narrow faces as shown. n oi: substantially equal width, i. e., oi suhlstantially equal extent in a direction parallel tojtheshatt as distinguished from aY Worm and worin wheel drive in which the worm has. a relatively long Aengaging face parallel to the shait. By the term face is meant the cyfli'ndricalA operative engaging portion of thef 'gearv or pinion.` avoids the use ot a longsl'iiral rgear or worm suchas commonly used in phonographs and which are expensive to inanutacture.

`Connected to the turntable shat't 33 is a suitable governor which may he of the type` usually employed. `This governor may com-V prise aworin ygear 39l engaging a worm 40 vmounted on a governor 'sha-tt 41 whicliis supported in hearings 42 and 43 carried rel and thus compensate toi-weari'ng down of the worm and worm gear. y ylhis strip 46' is secured to the block 45 loyr a set screw 47 eX- tending through a slot in the strip 46 and `threaded into the `hloclr 45.

` v The strip is moved alongthe hloclr. 45 hy means of an adjusting screw 48 lprovided with a' flange 49 which engages within a slot 59 in the strip 46 and thus transmits its longitudinal movenient to the strip 46.A ltwill heiniderstooe rth at Athe strip 46 Cannot he moved when the setv screw 4"? has heen tightened. v

vli/lounted on the governor shaft andgidly secured thereto is a diskv 51 to which. are SerEhe gears and pinions have facesv rihis arrangement cured two springs52 each carrying a governor weight and each secured at the re mote end. to a disk 54 which is slidahle along the governor shait 41.y ositionedto engage with the disk 54 under lcertain circunista'noes is the usual brake 55 supported in ay lug 56 on the lower side of the frame 11 and adapted to be adjusted 'i'om the upper side ot the trame in the usual manner.

rllhek entire trame of the phonograph is mounted on a three-point suspension at the points 60, 61, and G2, which are substantially outside the lateral limits ot the motor and are arranged symmetrically with repeetv to plane perpendicular to the fra-me .11 and passing through the winding shaft 31 andthe turntable shaft Assuming the usual stop to loe set to prevent rotation ot the turntable shaft and consequently to prevent rotation oic the intermediate shaft 35 and the drive spindle 18, rotation of the winding shaft 31 by the usual ywinding crank will cause a consequent rotation ot the windingspindle 17 through the coaction oi" the gears 30 and 1G, and this rotation ot the spindle 17 will tend to coil up the spring 57. When the tension in the spring 57 has heen increased in this manner to an `amount somewhat greater than that in the lspring 58 the entire spring harrel 20-21 will rot-ate under the influence of the spring 57 to rotate the outer end ot spring 58 and 'thus produce a tension Ain the spring 58 equal to that" in the spring 57. Continued rotation 'ot the winding shaft 31 will result in a-continued tensioning of the springs 57 and 58 in this manner until both are fully wound. The ratchet 31 prevents reverse rotation of the `winding shaft and retains the springs in tensioned condition. Then the brake is removed from the 'turntable shaft 33 the spring 58 willA cause rotation ot the drive spindle 18 and the spiral gear 19 secured thereto, and after a certain amount ot rotation o'lftlie drive vspindle 18 under the action of spring- 58, this spring will he appreciably weaker than the springv and the latter will cause a rotation ot the entire spring `loarr'el 20-21 toequalize the sion in the two springs. Thisequaliaation will take place continuously so longI as the power shaft is permitted to rotate'. dotation of the spiral gear 19 will cause conse quent rotation of the spiral pinion the intermediate shaft 35 and the spiral gear 38 secured thereto. Rotation o the spiral gear 38 Awill cause rotation of Vthe spiral pinion 59 on the turntable shaft 33and consequent rotation oi this shaft and -the turntable mounted on this shaft. The speed of the turntable shaft is governed by the governor in the usual manner.

The transmission which l have ydescribed above not only conveys power from the lib narrator drive shaft to the turntable shaft in a highly elicient manner but also operates quietly and substantiallyfnoiselessly. The suspension Which I have illustrated vgreatly facilitates adjustment of the frame in the cabinet to position the Winding shaft and turntable shaft properly with regard `to the apertures in the cabinet with which they are correlated. By the construction of spring spindle which I have herein illustrated l bring the extremity of 'the spring l securing rivet into the cylindrical periphery of the spindle and thus Wind` `my spring about a true cylinder and eliminate the usual distortion of the spring and the point of high curvature resulting` from this distortion. By `removing this Vpoint of high curvature, l greatly reduce the tendency of the spring to snap off and by `providing a substantially cylindrical periphery l secure substantially even tension in the' spring and eliminate the variations in tension due to the periodic variations in diameter which result from a securing means projecting from the spring spindle.

There are uses for my motor and advantages therein other than those which have been specically pointed out and there are embodiments and modifications other than those herein illustrated. These uses,`

advantages, embodiments, and modifications are all embraced in my invention, especially as they may be included in the appended claims.

l claim:

l. A phonograph motor comprising a spring, a governor therefor, a Winding shaft for tensioning said spring, a drive shaft arranged to be driven by said spring, a turn table shaft disposed at substantially right angles to said drive shaft, a turn table carried thereby, an intermediate shaft disposed at a substantial angle to each of said shafts., a spiral gear on said drive shaft, a spiral gear on said intermediate shaft meshing therewith, a second spiral gear on said intermediate shaft, and a spiral gear on said turn table shaft meshing with second spiral gear. l

2. A phonograph motor comprising a spring, Winding means for tensioning said spring, a drive shaft arranged to be driven by said spring, a turn table shaft disposed at substantially right angles to said driving` shaft, an intermediate shaft disposed at an angle of substantially l5 degrees to each of said shafts, a sliding and .rolling connection transmitting rotation from said drive shaft to said intermediate shaft, and a sliding and rolling connection transmitting rotation from sain intermediate shaft to said turn table shaft.

3. it. phonograph motor comprising a spring, Winding means 4for tensioning said spring, a drive shaft arranged to be driven `by said spring, a turn table shaft disposed said shafts, a sliding and rolling connection transmitting rotation between `said intermediate shaft and one of said other shafts,

and means to transmit rotation between said intermediate shaft and the other of said shafts. f

spring, a drive shaft arranged to be driven A pl'icnogiaph motor comprising a spring', Winding means for tensioning said by said spring, a turn table shaft disposed l 'at suhstantially'right angles to said driving shaft, an intermediate shaft disposed at a substantial. angle to each of said other shafts, means 'for transmitting rotation from said drive shaft to said intermediate shaft, and means transmitting' mediate shaft to said turn tableshaft.

5. ln a phonographmotor having a Winding shaft, a turntable shaft substantially in a plane through said Winding shaft, and a supporting frame, a three-point suspension I therefor having one point substantially in said plane and the other tivopoints arranged substantially symmetrically With respect to said plane.` i

6. ln a phonograph motor having a Winding shaft, a turntable shaft, and a supporting frame, a three point suspension for said kframe arranged substantially symmetrically With respect to said shafts. y

7. Asuspension as in claim 5, `Whereinthe points of suspension all lie substantially outside the lateral limits of said motor.

8. A phonograph motor comprising' a spring, Winding means for tensioning said spring, a drive shaft `arranged to be driven by said spring, a turn table shaft disposed at substantially right angles to said driving shaft, an intermediate shaft disposed at a substantial yangle to each of said shafts and lying substantially parallel to the plane determined by said shafts, a sliding' and rolling connection transmitting rotation from said drive shaft to said intermediate shaft, and

-a sliding and rolling connection transmitting rotation from said intermediate shaft to said turn table shaft. f f

9. A phonograph motor comprising' a spring' motor, adrive shaft associated therewith and driven thereby, a turntable shaft disposed at a right angle to the drive shaft, f

an intermediate shaft disposed at an oblique angle to `both of said shafts, a pair of gears operatively connecting the drive shaft and the intermediateshaft, and a pairof gears` operatively connecting the turntable shaft and theinterinediate shaft, the tvvo gears of rotation from said intereach pair having faces of substantially equal` Widths.

'10. A phonograph motor comprising a spring motor,v a drive shaft driven thereby,

e urmeble shaft disposed at a right angle to the drive shaft, an intermediate shaft dispose a-trsubstana'ly equa obque angles to bofh said lstmenoned shafts, a, pair of wlmi gears operatively connecting' the drivey and the intermediate shaft, and a pair of @wel geene opemmvely eolmectmg he nftermedete shaft andthe uinteble sha-ft,

doe two gears of @meh pair having faces of substantlaly equal Wldths.

l1.; A, phonograph moor eo-mprleng a spring motor, a drive shaft driven thereby,

May 1919.

,LOUS D. NADEL,

Images