US1573348A - Talking machine - Google Patents

Description

FbQ '16 192 6. f

I 1,573,348 w. LAWRENCE TALKING MACHINE Filed'March 8, 1924 2 Sheets-Sheet 1 Imam-mm I G. Lawrence Feb. 16 1926." 1,573,348

- G. w. LAWRENCE I TALKING MACHINE Filed March 8, 192 2 Sheets-Sheet 2 6 m ,7" W? L G, YY, Lawrencc Patented Feb. 16, 1926.

barren stares PATENT OFFICE.

TALKING MACHINE.

Application filed. March 8, 1924. Serial No. 697,865.

. ed certain new and useful Improvements in Talking Machines of which the following is the specification.

The invention relates to improvements in talking machines and particularly to a winding appliance for the motor of a talking machine and an object of the invention is to provide a winding crank located above the motor board and beneath the turn table and controlling the winding of the spring motor and rotatable in winding around the turn table, such winding arrangement permitting of the easy Winding of the motor in a comparatively few turns of the crank and maintaining the crank in an unexposed position and such that it is entirely enclosed when the customary cover of the talking machine is closed.

A further object of the invention is to arrange the appliance in a simple, durable and efficient manner and so that it can be readily assembled or dismounted as occasion may require.

With the above more important objects in view the invention consists essentially in the arrangement and construction of parts hereinafter more particularly described and later pointed out in the appended claims,

reference being had to the accompanying drawin s in which Fig. 1 is a sideviewof the invention as it appears installed on a talkingmachine.-

Fig.2 is a. plan view of the motor board of the machine and the turn table, part of the turn table being broken away to expose construction.

Fig. 3 is an enlarged detailed vertical sectional View centrally through the turn table and associated parts.

Fig. 4 is a horizontal sectional view at tl Fig. 3 and looking downwardly.

Fig. 5 is a horizontalsectional view at 55 Fig. 3 and looking upwardly.

Fig. 6 is an enlarged detailed vertical sectional view through the upper end of the driving shaft and associated parts,

Fig. 7 is adetailed sectional view showing the friction shoe and turn table shaft.

In the drawings like characters of reference indicate corresponding parts in the several figures.

The motor board 1 is the same as that customarily employed in talking machines, such carrying the talking machine motor utilized to drive the turn table. Rearwardly the motor board carries the tone arm 2 which is fitted with the customary sound box 3 carrying the stylus or needle 3t- Centrally of the motor board is the turn table shaft- 5 which carries the turn table 6 on which the customary record 7 is placed, the record being played by the needle in the usual way during the rotation of the record.

The above parts are all of ordinary construction and form no part of my invention with the exception of the turn table spindle which is specially constructed as shortly described.

I might here point out, however, that it is to be observed there is a clearance space be tween the rear side of the turn table and the front side of the tone arm, such permitting of the free turning around the turn table of the special crank which I provide. 8 and 9 are upper and lower bearing plates suitably spaced apart and fastened together by spacing posts 10. These plates and posts form what might be called the motor frame and the said motor frame is suitably supported from the underside of the motor board, there being, a space reserved between the top plate and the underside of the motor board.

The turn table shaft 5 is rotatably carried in suitable bearings formed in the plates, the upper end of it projecting through a comparatively large opening 11 in the motor board and being fitted with a cross pin 12 which is adapted to enter a cross slot 13 provided in the lower end of thehub 6 of the turn table. This slot and pin arrangement is provided to cause the rotation of the turn table with the shaft and at the same time permit one to remove the turn table by raising it if desired.

The plates 8 and 9 provide bearings also for the motor driving shaft it on which is rotatably mounted 1:119 cup like spring casinner end fast to the shaft and the outer end fast to the casing. v

I have not considered it necessary to enter into the details of this arrangement as it is a well known construction, being found on practically all spring motors now on the market.

On the upper end of the main shaft between the plate 8 and the motor board I 10- cate a ratchet wheel 18 and a gear wheel 19, these both being keyed. to the main shaft as indicated at 20. The plate 8 carries a spring pressed dog or pawl 21 engaging the teeth of the ratchet wheel 18 and the said teeth and dog are arranged such that a clockwise rotation of the shaft is prevented by the dog engaging with the teeth. The gear wheel 19 is meshed with a gear wheel 22 rotatably mounted on a sleeve 23 rotatably carried by a spacing sleeve 24 rotatably mounted on the upper end of the spindle 5. Here it will be observed that the upper end of the sleeve 23 is in the form of a socket which receives freely the hub like extension of the turn table and also the cross pin 12. The gear wheel 22 is supported rotatably on the sleeve 23 by a ratchet'wheel 25 permanently keyed to the sleeve and rotatable therewith.

A spring pressed pawl or dog 26. is carried by the wheel 22 and engages'thc teeth of the ratchet wheel 25, the dog and ratchet wheel being constructed such that a clockwise rotation of the sleeve 23 causes the rotation of the wheel 22.

27 is a horizontally disposed winding crank or'lever radial to the upper end of the sleeve .13, the inner end of the crank being permanently secured to the upper end of the said sleeve, whereby the sleeve is 1'0- tated when the lever is turned, The lever is somewhat longer than the radius of the turn table and it is fitted at the outer end with an upturnedextension 27 supplied with a vertically disposed finger and thumb grip 28.

Obviously the lever can be rotated by grasping the finger piece and swinging it around the turn table and such movement willproduce a rotary movement of the sleeve 23-and ratchet wheel secured thereto.

A fly ball governor 29 of the customar form is provided, the governor shaft 30 being suitably carried by the plates 8 and 9. The governor shaft is rotated by a small pinion 31. secured thereto and in mesh with the driving gearwheel 32 fastened to the lower end of theshaft 5. The shaft 5 also carries a small. pinion 33 meshed with a large driving gear 34 secured to a countershaft- :35 carried by'the plates. The said countershaft is also supplied with a pinion 36 which meshes with a large gear wheel 37 carried by a second countershaft 38 having hearings in the plates. The shaft 38 is fitted with a small pinion 39 which meshes with the driv ing gear wheel 16.

The train of gears and pinions latterly described are utilized to drive the shaft 5 and the governor and are selected to give a proper driving speed to-the shaft 5 and governor for normal working conditions. The underside of the plate 8 carries pivotally an arm 40 which is fitted with a brake shoe 41 normally engaged with the shaft 5, being held in contact therewith by the action of a coiled spring 4-2. The outer end of the arm is connected by means of a link 43 to a lever 44 located at the lower end of a spindle l5 carired by the motor board, the said spindle being fitted at the'upper end with a push crank 46. v

The arrangement of the latter parts is such that when the crank 40 is pushed in a proper direction it will relieve the brake shoe from the shaft and such that when the brake is engaged with the spindle the shaft 5 is prevented from rotating. The operation of the appliance is now described.

When one desires to wind the motor he catches the finger piece 28 and turns the winding lever in a clockwise direction. As the lever turns the dog 26 effects the rotation of the gear wheel 22 with the ratchet wheel 25 which latter is fixed to the sleeve Accordingly the gear wheel 22 rotates the gear wheel 10 in a counter-clockwise direction, that is in a direction which causes the dog 21 to escape over the teeth of the ratchet wheel 18. As the gear wheel 19 is permanently secured to the driving shaft 14 the spring 17 iswound within the casing and in this coimection it is explained that the easing is prevented from rotating on the shaft by the action the brakeshoe which prevents any rotation of the shaft 5 until released.

It will be observed that the train of gears and pinions connect the gear 16 with the shaft 5-so that if the said shaft is prevented from rotating by the brake shoe the gear 16 becomes automatically locked. During the winding action the turn table and disc thereon remains stationary as the winding lever revolves around the shaft 5 and the shaft is locked against rotation by the brake shoe. However, as soon as the brake shoe isreleased from the shaft 5 the said shaft is rotated as is also the governor, the spring 17 then rotating the gear wheel 16 around the shaft 14' and acting through the train of gears to drive the shaft 5 and the governor.

During this latter driving movement the gear 19 and ratchet wheel 18 are positively prevented from rotating by the'dog 21.

I have found that for the average sized talking machine motor two complete revolutions of the winding crank will wind the spring 17 sufiicient to play what is known as a ten inch record and that three turns of the winding crank will play a twelve inch record. Accordingly the winding of the motor in my machine takes very little time when compared with the crank winding which has to he done with the greater numher of machines now on the market. Further, by having the winding lever positioned in the manner herein described there is no crank exposed when the customary top of the gramophone is closed down. This improves the general appearance of the machine and avoids having any protruding part liable to catch on the clothes of one passing the machine.

WVhilst I have entered into a detailed description of the various parts it will be readily understood that I do not wish to be limited to the details of the construction shown as these could be readily modified Without departing from the spirit of the invention as set forth in the appended claims.

What I claim as my invention is 1. In a talking machine, the combination with a spring actuated motor presenting a driving shaft, a turn table shaft and a turn table carried by and rotating with the turn table shaft, of a winding crank revolvable around the turn table shaft and extending outwardly beneath the turn table and pro vided at its outer end with a hand grip, ratchet controlled intermeshed gears for effecting the rotation of the motor driving shaft to wind the motor spring and in the rotation of the crank in a pre-determined direction, releasable friction means preventing the rotation of the motor shaft subsequent to the spring being wound and a train of gears and pinions connecting the motor with the turn table shaft and adapted to rotate the turn table shaft upon the aforesaid friction means being released.

2. In a talking machine, the combination with a spring actuated motor presenting a driving shaft, a turn table shaft and a turn table carried by and rotatable with the turn table shaft, of a sleeve rotatable around the turn tahle shaft, a winding crank having the inner end thereof permanently secured to the sleeve, the outer end thereof provided with a hand grip revolvahle around the periphery of the turn table, a ratchet wheel secured to the sleeve, a gear wheel rotatably mounted on the sleeve and provided with a spring pressed dog engaging the ratchet wheel, the dog operating to turn the gear wheel upon the crank being turned in a clockwise direction around the sleeve, a gear wheel permanently secured to the motor driving shaft and meshing with the former gear wheel, means preventing the turning of the latter gear wheel under the influence of the motor spring, a driving gear rotatably mounted on the driving shaft and adapted to be driven by the spring of the motor and an intermeshed train of gears and pinions between the latter gear wheel and the turn table shaft and a brake shoe engaging with the turn table shaft and adapted to prevent the rotation thereof under the action of the wound spring until said shoe is released.

Signed at lVinnipeg, this 15th day of February 1924.

GEORGE W. LAWRENCE.

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