US1289282A - Talking-machine motor. - Google Patents

Description

W; G. SHE'LTON.

TALKING MACHINE MOTOR.

' A PPLICAT,|0N FILED MAR. 1s. 1.918.

1,289,282, I Patented Dec. 31,1918.

Fa .j.

M INVENTOR @m 14% By Aiiorne ys, I

I WITNESS the said operation closing orrroia VJILLIAM GENTBY SHELI'ON, OF NEW YORK, H. Y.

Il'ALKING-MACHINE MOTGR.

Specification of Letters latent.

Patented Dec. 311, 11918.

Application filed March 16, 1918. Serial No. 222,833.

To aZZ whom it may concern:

Be it known that 1,. WILLIAM GENTRY SHELTON? a citizen of the United States of America, residing in the borough of Man hattan, city of New York, county .of New York, and State of New York, have invented certain new and useful Improvements in Talkingdviachine Motors, of which the fol lowing is a specification.

lhis invention relates to improved electrical apparatus for operating talking machine reproducers' and has for an. object to provide means for automatically stopping the motor and breaking the circuit thereof after a predetermined amount of rotation is imparted to the record supporting device, and also to provide means for setting the cutting off mechanism at a predetermined point and by the circuit for starting the motor. y

In the drawings accompanying this application two modifications or? a practicable embodiment of my invention are illustrated, in which drawings Figure 1. shows a form of my improved apparatus. in elevation, a portion of the motor casing being broken away to show the relative position of the parts.

Fig. 2 is a horizontal section of Fig. 1, taken on a plane about the line 2--2, look ing downwardly Fig. 3 is a top view oi the motor showing the permutation index.

Fig. 4 is a view somewhat similar to Fig. 1, showing a different arrangement of? the reducing gear, and

Fig. 5 is a top view of the Fig. 4 construction.

In the constructional embodiment illustrated in Figs. 1, 2 and 3, a form oi motor casing is illustrated for resting upon some portion, preferably the table of a talking machine. This casing is designated by the reference character 7. Within the casing is shown mounted the armature 8 of an electric motor. The shaft 9 thereof being shown provided at its lower end with a friction pulley 10 for engaging the record support or turntable ll adapted to carry a record disk 12.

One of the objects of this invention is to provide means whereby the operator upon starting the motor may set a' circuit breaker in position to stop the motor and the rotation' of the record dish upon a predetermined amount oi rotation thereof, either switch.

based upon the diameter or" the disk itself, or

based upon such diameter rectified by the quantity of record carried by the disk. To this end the armature'shaft 9 during its rotation of the record support 11 also operates through the instrumentality of reduction gearing a circuit breaker. In the present illustration it is assumed that the current is led intothe motor by means of a suitable cord 13 and that such current passes tothe switch fingers 14 and 15, which are shown mounted. one above the other and properly insulated. The circuit is normally closed by the engagement of such fingers one with the other, and is interrupted by the forcing of these fingers apart by a circuit breaker formed of insulation material. Such current breaker being illustrated at 16 in the form of an arm fast on a shaft 17 projecting above the top plate 18 of the motor casing, other parts of the mechanism heretofore mentioned being located below such top plate. The outward portion of the shaft 17 is shown having fast upon it a finger 19 adapted to register with an index 20 suitably carried by the top plate. The end of the shaft 17 is' shown finished 0E by means of knurled head 21, for enabling the ready setting of the The upper end of the armature shaft 9 is shown provided with a worm 21 meshingwith a worm wheel 22 fast on a shaft 23 supported in suitable bearings carried by the casing. A worm 24 is formed on the shaft 23 and is shown meshing with a worm wheel 25, frictionally carried by the shaft 17. The reductions which I have found useful in practice are approximately 10 to 1 between the pulley 10 and the record support 11.. 30 to 1 between the worm 21 and the Worm wheel 22, and 120 to 1 between the worm 24 and the worm wheel 25. This of course is given merely by way of illustration for the purpose of explaining to the skilled workman the principle of operation of the mechanism in the example shown in the drawings. 4 The index 20, as shown in Fig. 3, is provided with a point marked Ofif which indicates, when the finger 19 registers therewith, that the armature 16 is interposed between the switch fingers 14 and 15 and that the current is ofii. The index or dial 20 is also provided with points marked 6, l0 and 12, intended to correspond withrecord disks of sin, ten and twelve inch diameters respectively, and located at. distancesapart,

it may be well to state that upon placing the record disk 12 on the support 11, the openator will, notice the diameter of the disk and take hold of the knurled head 21 and turn,

the pointer 19 until it registers with the d cation on the dial correspondmg with the diameter of the record. This movement not only determines the amount of travel of the switch arm 16 before it interrupts the cir- 'cuit, but also immediately closes such cir- 2o cult and starts the motor. After the operator becomes more skilful in gaging the amount or quantity of record upon the disk,

he places the pointer either short of or beyond the point indicated for the diameter" of the record which he is employing according as the disk contains less ,or more record than is normal for that diameter. It is also feasible for the operator to arrange the de vice so that it will interrupt the circuit and stop the record at any intermediate point, so that if he does not wish to have the end of the record reproduced, he may set the device for stopping the motor wherever he wishes. It is, of course, apparent that the reduction gearing immediately upon the setting of the switch arm 16 moves this toward the fingers 1 1, 15 and at the predetermined point causes such arm 16 to interpose itself between such fingers and interrupt the curto rent;

The eccentric relation of the dial 20 to I "the top plate 18 for certain classes of trade is undesirable owing to its unsymmetrical appearance The form of mechanism illusformed concentrically upon th top plate 180 and the shaft 170 in axia alinement with the armature shaft 90. The reduction gear in this instance comprises a worm 210 220 fast on shaft 230, such .shaft having a Worm meshing with a worm wheel 250 fast on a shaft 251, which shaft also has fast upon it a friction gear 252, engaging the periphery of a disk 253 fast on the shaft 170.

The insulation switcharm 160 is shown carried by the disk 253, the switch fingers 14:0

and 150 in this instance being carried by the top plate 180 of the casing. The index fing'er 190 is shown traversing a circle concentrio with the outline of the motor casing and the setting head 210 as symmetrically located thereon.

l'.n the Fig. 1 construction the necessary slipping of the parts in setting is permitted trated in Figs. i and 5 shows thediiil 200' on the shaft 90 meshing with a worm wheel naeaaea of illustration.

What I claim is 1. The combination with a talking-mathine record turn-table, of an electric motor orfdriving the same, a sw1tch .for controllingthe motor circuit and embodying a settable member movable to variable positions on starting, indicating means therefor, and reduction gearing between the motor shaft and such settable member.

2. The combination with a talking-machine record turn-table of an electric motor for driving the same, a switch for controlling the motor circuit and embodying a settable member and reduction gearing be tween the motor shaft and such settable able with the settable member.

3. A talking-machine motor comprising an electric motor having a pulley for driving the record of a talking-machine, a switch for the motor circuit, a member adapted to open and close such switch, reduction gearing between the motor shaft and the said member, and means for moving the said member away from its circuit breaking posimember, a dial, and an index pointer movtion-a predetermined distance for permitting a predetermined amount of rotation ofthe said pulley.

4. A talking-machine motor comprising an electric motor, and means carried thereby for driving a talking-machine record, a

switch for the circuit of said motor com- 1 prising a pair of spring fingers, an insulation armadapted for interposition, between said fingers, a shaft carrying the switch arm, and reduction gearing between the said shaft and the motor shaft, with a slipping connection between the latter and said arm.

5. A talking-machine motor as set forth in claim 4 embodying a dial on the motor casing and an index finger registering with such dial and carried by the switch arm shaft.

6. A talking-machine motor comprising a motor casing, a motor concentrically mounted therein, one end of the motor shaft being provided with a pulley for driving a talking-machine record, the other end of said shaft being provided with a worm, a'switch for the circuit of said motor, comprising a pair of spring fingers normally in engagement, a shaft extending through the end of the casing, and in axial alinement with the motor shaft, a train of reduction gearing aaaaea between thesaid switch shaft and the mo switch shaft for registering with the dial tor shaft and embodying a slipping element, and indicating the position of the insulaan insulation arm fast with the said switch tion arm.

shaft and adapted for interposition between In Witness whereof, I have hereunto 5 the switch fingers, a dial concentrically dissigned my name. I

posed-0n the outside of the end of the 'casing, and an' index finger carried by said WILLIAM GENTRY SHELTON.

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