US1238918A - Device for controlling the speed of disk records. - Google Patents

Description

R. T. HOSKING.

DEVICE FOR CONTROLLING THE SPEED OF DiSK RECORDS.

APPLICATION FILED JUNE 1. m5.

Patented Sept. 4, 1917.

5 MW a IN VEN TOR.

A TTORNE Y tit RICHARD T. HOSKING, OF SAGINAV, MICHIGAN.

Application filed June 1, 1915.

To all whom it may concern:

Be it known that I, RICHARD T. Hosnmo, a citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in Devices for Controlling the Speed of Disk Records; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to graphophones and pertains more particularly to an improved device adapted to vary the angular speed of the disk while the swinging tube that carries the needle moves from the outer periphery toward the center of the disk.

A further object is to enable the angular speed of. the disk to be controlled in the same manner as is now customary in graphophones to produce the proper tones from the record, while still permitting the speed of the disk to be increased in proportion to the radial distance that the needle has traveled inwardly from the periphery of the disk.

Another object is to provide a simple and inexpensive device that can be easily and quickly applied to present-day graphophones by persons unskilled in mechanical matters, whereby the speed of the disk is automatically controlled for the purposes set forth.

lVith these and certain other objects in view which will appear later in the specification, my invention consists in the devices described and claimed and the equivalents thereof.

In the drawings, Figure 1 is a part top plan view of a graphophone embodying my improvement.

Fig. 2 is a perspective view of the motor and the usual speed controlling device, the table on which the motor is mounted being shown tipped up to expose the motor.

Fig. 3 is a top plan view of the speedindicating device.

As is clearly shown in the drawings, the device consists in the usual taper tube 1 carrying the sound box 2, upon which the needle 3 is mounted. 4 represents the disk record, and 5 the speed regulator. -The" foregoing parts are all or" usual construction and arrangement.

When the speed regulator 5 15 set by Specification of Letters Patent.

Patented Sepla'et, 191?. Serial No. 3].,d77.

means of its adjustable pointer 6 to produce any certaln angular speed of the disk at, that angular speed will be maintained until the entire record has been reproduced, although the linear velocity of the disk past the needle 3 will have decreased from'a maximum atthe periphery of the disk to a minimum at the inner limit of the disk.

It is one object of my present improvement to provide a device adapted to be applied to a graphophone bonstructed substantially as above described, whereby the angular speed of the disk will gradually increase as the needle travels toward the center of the disk, thereby enabling a much longer record to be carried on a disk of given diameter, and also to assist in main-- taming a g1ven tone quality throughout the entlre record.

.Clo apply my improvement, I attach to the swinging taper tube 1 a connecting member that will automatically change the angular speed of the disk, preferably by shifting the adjustable pointer 6 of the speed regulator 5 while the needle is traveling from the outer periphery toward the center of the disk. The improved device may be of any suitable construction equivalent to the device as illustrated in Fig. 1, where 7 is a radial arm removably secured to the taper tube and adapted to swing with the tube and 8 is a longitudinally movable link removably pivotedas at 9- to arm 7 and extending underneath the turn table on which the disk 4: is mounted. The other end of the link 8 is preferably pivoted at 10 to one end of arm 6 which carries the cam 11 of the speed regulator 5. Movement of the needle 3 and taper tube 1 from the right toward the left, in Fig. 1, will swing radial arm 7, drawing the link 8 with it and shifting the cam '11 and pointer 6 which is carried by it, so that the pointer will approach the position fast shown in Fig. 3. Thismovement of the pointer 6 actuates the arm 12, Fig. 2 to control the friction disk 13, both of which are of the usual construction of graphophone speed-governors to increase the speed of the disk 4.

When it is desired to reproduce a record' of the type now in common use, in which the disk travels at constant angular speed,

I disconnect the link 8, and, having set the pointer 6 to the proper speed, clamp the pointer to the plate of the speed regulator as by a set screw 14.

By the means above described, I have produced a speed-control device that can be easily and quickly applied to a graphophone of the usual construction, without dismantling the instrument, that can be made at small expense, is easily applied and not likely to get out or order.

Having thus described my invention, What I claim and desire to secure by Letters Patent is In a graphophone, the combination With the pivotally mounted taper tube carrying the needle, of aradial arm, removably secured to the taper tube. a link connected to said radial arm and extending underneath 15 the disk record of the graphophone, one end of said link being pivotally secured to the actuating member of the speed regulator of the graphophone for the purposes set forth.

In testimony whereof I allix my signature 20 in presence of two Witnesses.

RICHARD T. HOSKING.

Witnesses:

NELLIE M. ANGUS, J. V. CARPENTER.

Images