US1246823A

US1246823A - Talking-machine motor.

Info

Publication number: US1246823A
Application number: US137621A
Authority: US
Inventors: William Gentry Shelton
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-12-18
Filing date: 1916-12-18
Publication date: 1917-11-13
Anticipated expiration: 1934-11-13

Description

To ail may I i n Ere-sisal.

original ap:

Be it known th SHnL'roN, a citizen America, residing hattan, city, county, have invented certain new and ii iii provements in Talking-Machine hiotors, o which the following is a specification.

This invention relates to mechanism for driving the record of a talking machine, the ob ect of the invention being to provide a satisfactory, simple inerpensive device of this character, andone Y t vibra- DU tflri) tions or the motor are ahsoi oea are not communicated to the talking machine record:

This application is d endin apolication, Se; bepteinoer 193.5 for in machine motor, and of plicatioh, Serial No. 90,0 1916, for driving i'ilQCllfiIllSI The drawing accompany part of this application is elevation and partly in v'e praotioable emiiodiinent o; app-lied to a talking nachin F or the purpose illn tion, a talking machine inehas been selected to show the appiica n of certain parts of the invention their peculiar relation thereto. a

The table 1 of the framework is shown carrying a horizontally disposed rotary supporting platen 2 for carrying and rotating the record dish Some suitable material such as felt i ably interposed between the platen invenhe record. The platen is shown carried by a spindle 5 disposed in substantially a i and acting as the axis or pivot about which the platen is rotated.

In the present showing the platen and spindle 5 are adapted to move together. A governor is provided for the platen and 1s adapted to control the speed of the same whether the rotative force is applied to the platen through the spindle or is applied to the spindle through the platen A well known form of ball governor is shown in the present illustration. This comprises a spindle 12 mounted in suitable hearings and carrying a worm wheel 13 meshing with a worm wheel 14 fast on the platen spindle 5,

The governor spindle has W n a we r car position sonar.

urality of springmembers 15, each prosuite is weight or hall 16. i hes 15 are shown connected to j which upon the rotation of the a and the outward centrifugal move-- ment 0 the balls, will be drawn toward the left in the illustration, and upon excessive rotation ag inst a suitaole braking device. The drawing shows the parts in the position oi? rest, and the friction member 18 of the brake engagement with the governor disk 1 The friction member 18 1s shown carried by a lever pivoted to the framework and associated with actuating mechanism 20 n the side of the table i. in this form of governor, the brake lever is set oer at theposition of stop or terrniiied degree speed and cooperates with governor in assuring the proper l or" the platen when under the rotative influence oi. driving mechanism.

The electric motor illustrated in the drawiii-g is shown permanently attached to the, underside of the tahle 1 of the irai rework by means of a supporting bracket secured in position hy means of screws The term permanently connected is used indicate that the motor illustrated is preferably built in with the machine and constitutes a part thereof, and when built in becomes an elh; merit of the permanent equipment. The electric motor is shown mounted in the cas ing or housing 26 pivotally supported at 331 by the bracket 25. The shaft 27 of the motor is shown extending above the table and there provided with a driving pulley 30.

for instance, sponge rubber. The yield ability of the motor and its casing incident to the elasticity of the spring" 28, permits of the driving pulley 30 of the motor having secure and sufficient tractive engagement with the platen for driving this forward without slipping. Owing to the undulations in movement, relative to its shaft of shaft, or the journals of the the talking machine, a certain predeor eccentricity of the platen amount yieldability of the driving pulley of the motor toward and from the platen is essential, and is provided by means of the construction above describe The tractive engagement and the yieldability of the parts is enhanced by constructing the pulley 30 of some very elastic material, and any shocks jars incident to operation are largely minimized by such construction.

As was above stated, a L 00d 1 iaterial for the pulley 30 is sponge rub er or equivalent.

As a. traction drive for a talking machine record support, sponge rubber is a material which offers a positive means of driving the phonograph turntable without undue slipping, and at the same time provides a resilient contact which is noiseless. Applicant knows of no other material which is so well suited for this purpose. The sponge rubber offers the natural adhesive qualities of rubher, and because of this resiliency odors a large contacting area with a minimum pres- H8. The natural adhesive qualities of rubber being great, the drive is eilected with a minimum of friction on the motor shaft.

-in some installations the sponge rubber in the pulley will be found to olicr the necessary re 'encv to insure good tractive con.- tact without the use of auxiliary springs. The spring 28 in the present illustration as isabove described, serves functions: (1) that of insuring the contact between the pulley and work, and (2} that of cooperating with the mechanism for holding the pulley away from its worl: in preventing any noise incident to. vibrations which might arise were the sprin not present.

The features herein illustrated of the underneath electrical dri e for talking ma chine wherein the motor is mounted beneath the record'supporting platen and is provided with an upwardlycxtcnding pulley, is broadly claimedin a co-pending application, Serial No. 90,051 above identifier.

W hat l. claim is 1. A frictional driver comprising a motor having a shaft and. a pulley rormed oi sponge rubber mounted on. such shaft.

2. The combination with a rotatable talkmachine record support, of an electric morubber tor, and a sponge rubber pulley carried by p the motor for frictionally engaging and! driving the said record support.

5. The combination with a rotary talking machine record support, oi an electric motor, a sponge rubber pulley carried by the motor for frictionally engaging and driving the said record support, and means for elastically yieldably impelling the pulley against the said record support.

6. The combination with a phonograph table disposed in a substantially horizontal position, of a rotary record support mountedabove such table, an electric motor mounted below such table and provided with a shaftextending through the table, and a sponge rubber pulley mounted upon said rhaftextension for engaging and friction ally driving the record support.

7,. The combination with a phonograph table disposed in a substantially horizontal position, oi a rotary record support mounted above such table, an electric motor mounted below such table and provided With ashaft extending through the table,'a sponge rubber pulley mounted upon said shaft extension for engaging and friction-ally driving the record support, and means'for elastically yieldably impelling the pulley against the said record support. r

in witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

WELLIAM Vlfitnesses: I

J. Moouus Pnncoou, G. B. Glimmer).

GENTBY SHELTGN.