US1929092A - Two-speed phonograph driving device - Google Patents

Description

Oct. 3, 1933. D|EHL r AL 1,929,092.

TWO-SPEED PHONOGRAPH DRIVING DEVICE Filed March 5. 1932 2 Sheets-Sheet .l.

wvewbov and James M IVauZ Wwtw;

TWO-SPEED PHONOGRAPH DRIVING DEVICE Filed March 5, 1952 2 Sheets-Sheet 2 and c/Ezmes M jVauZ Ni Ewe 4 40 D Patented Oct. 3, 1933 7 TWO-SPEED PHONOGRAPH DRIVING Y WQ Frederick Diehl, ElizabethjanialamesiMfNaul, r g. .Fanwood, N. .1L, assignorsto Diehl,Manufacturing flompanygElizabethNiJl,acoiporation a 1 n palm: Mach. 1

saz serial No. 596.926

"invention relates tofphonograph"motors of the type having a'vertical turhtable spindle 'driven from an electric motor through table Ispeedreductibn gearing; "l h'ere'are'now' 'v'ail- 5' able on the market records of two different a i- 1 1' paratively' easy' of accomplishment but the-res'jiltsffhave been unsatisfactoryf'due" to a slight Twaveiing' ori variation infthe speed of' the turnj tablefs'pindle. particularly whefirunning at the lowerjst'andard speed; whichwaveri'ng produces a correspondin ill ctuation in the pitch the rebe attained." i

The object of the present invention is to provide a two-speed phonograph motor having steady running chaarcteristics at either of its turntable speeds so that a high standard of excellence and faithfulness may be attained in the reproduction of sound from records of either of the two standard speeds available.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

Fig. 1 is a longitudinal vertical section through a phonograph motor embodying the invention. Fig. 2 is a transverse vertical section on an en- 4 larged scale. Fig. 3 is a perspective view of the selectively shiftable clutch-element for determining at which of the two standard speeds the turntable-spindle is to be driven. Fig. 4 is a section on the line 44, Fig. 1, and Fig. 5 is a view showing the operating connections for the selective speed-shift means.

1 represents the usual top-board of the phonograph cabinet or enclosure having the opening 2 which receives the inset supporting plate 3 from which the phonograph motor-frame 4 is suspend- 'Jeu-rnaled horizontally in and longitudinally of the-frame l in'bea'r'ing'bushings 8, 9-is the motor- 5 shaft 7' having cut therein-the two thread worm 10. 'outboardprojection of the-shaft v beyond'the bearing" 8 carries the usual squirrel-cage rotof-elementfll of an induction motor including a 'stator'12 ofw'ell known shadedpole construc- 7 tiOnJsHch-asdis'cIQsed in the U; S. patents to H. L. Zabriskie, -No.=1;838,047, of Dec. 22,1931, and Jg'lVI; Nalll,I I0...l.l'l23,555,.of Sept. 15, 1931; the

stator 12 being mounted on the frame 4. 7

- ilvleshingwith the worm 10,-Fig. 2, is a gear 13 ,iixed; to tlre sleeve shaft 14 journaled on the statio1iary-. sleeve;15 thelower end of which is tightly cylindricalrece ss 16 in the I troughof ,thelframea Fixed to rotate with the sleeve-shaft 14 and gear 13 is a 3 disk 17 having two upstanding diametrically opposed coupling pins 18.

There is also fixed to the sleeve-shaft 14 a gear 19 which meshes with a gear 20 on the counter shaft 21 journaled in bearings 22 in the trough s5 4 and cover 5. The counter-shaft 21 carries a small gear 23 which meshes with a large gear 24 having a tubular or sleeve-like hub 25 journaled in a bearing 26 in the cover 5. A collar 27 is secured to the upper end of the hub 25 to prevent the gear 24 from dropping from its working position. There is fixed to rotate with the gear 24 and its hub 25 a disk 28 from which two diaietrically opposed coupling pins 29 project downwardly.

Journaled in a bearing 30 in the trough 4 and in the bearing-cap 31 secured to the cover 5 and enclosing but not touching the upper end of the sleeve 25 the collar 27 is the turntable-spindle 32 carrying the turntable 33. The turntablespindle 32 passes freely through the sleeves 25' and 15 Without touching either of them.

Slidably mounted on the turntable-spindle 32 and spl'ned at 34 to rotate with the latter is the coupling disk 35 having upper and lower pairs of radially disposed coupling pins 36 adapted to engage one or the other of the pairs of coupling pins 13, 29 to connect the gears 13 and 24, selectively, to the turntable-spindle 32.

The coupling disk 35 is formed with a peripheral groove 37 to receive the clutch-collar 38 pivotally carried by the clutch-shifting fork 39 fixed to the rock-shaft 40 which is journaled in the frame 4 transversely of the motor-shaft 7 and 6 carries aniiupstand h Din-41 at its outer ,end

which enters'a slot 42 in the arm 43 of the ver tical rock-shaft 44 having a suitable operating handle 45 fastened to its upper end.

By shifting the handle 45, which is accessible 1 beyond the edge of the turntable 33, the operator may couple the turntable-spindle to either of the gears 13 and 24. The gear ratios are so worked out that the gear 13 rotats atlg R. P. while the gear 24 rotates at 33' R,P

A feature of the invention is the coaxial arrangement of the high and'lowispee'd-gears .13, 24 with the turntable-spindle 32 with no frictional drag of either gear on the spindle 32 while he-sp ndle being driven by h the searph nosraph m ton :inbe ore referred ta; touch .a pe d vs n somprises acolla Afi fiified t thermotor shaft 7 :=-and carryin that; spring, arms, havi -W =d8iandri ifitiqn nads 49 :atthei mouieren u The wei htsia are disposedemainly at one side of .thet lane of. the arms'e'lvwhile the friction :-'-pads '49 are -at-the other. siderof such plane; As i the shaft comesup tospeed the. centrifugal force exerted by'the welghts 48 bows the outer ends o'f'the arms'4'1-toward the stationary brake- 50 and causes-the pads 49 to wipe circularly over tire-face 6f hrake-disk. The brake- ,dLSKfiQ is slidably mouhted' oh the bearing sleeve j 9 and haslafhol filfm itshuh entered byan ec- ,s mr n t t' 15 speed of the motor-shaftT."""

centric pin 52 on the rock-shaft 53 which carries" the speed-adjuster handle 54.

Having thus set forth the nature of the invention, what is claimed herein is:

1. In a phonograph driving device, a frame, a sleeve-shaft journaled in said frame, a turntable, a turntable-spindle passing through said sleeveshaft without touching the latter and journaled insaid frame independently of said shaft, a constant qspeed motor-shaft, and selectively controlled rneans for driving said sleeve-shaft and said turntable shaft at the same or at difierent sp s.

2. In a'phonog'raph driving device, a constant speed motor-shaft, a housing, a low speed gear connected to be driven by the motor-shaft and journaled in said housing, a high speed gear connected to be driven by the motor-shaft and journaled in said housing coaxially with and independently of said low speed gear, a turntablespindle passing through said gears without touching either of them and journaled in. said housing independently of said gears, and I,selec- .tively controlled means for coupling either of said gears to the turntable-spindle. I v

3. In a phonograph driving device, a frame including a hollow trough-shaped member and'a removable cover, a low speed gear in said hollow member and having a-sleeve-like h'ub journaled in said cover, a cap-member on said cover enclosing the upper end of said hub, a. turntablespindle passing through said hub withoutjtouch- ,ing thelatter and-journaled in said cap-member and in a bearing in the bottom 'of saidt'roug'h-- I shaped member, a constant speed motor shait -connected to drive said low-speed gear, and selectively controlled means for connectiii'ggsaid low speed gear to said turntable-spindle to ldrive the latter at a low speed or for connecting the motor-shaft to the turntable-spindle independ- .entlypf said low speed gear to drive said spindle at'a higher speed. I

v 1 1 FREDERICK DIEHL.

JAMES M. NAUL.

Images