US1410158A

US1410158A - Automatic stop for disk records for talking machines

Info

Publication number: US1410158A
Application number: US470322A
Authority: US
Inventors: Bland Joseph Franklin
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-05-17
Filing date: 1921-05-17
Publication date: 1922-03-21
Anticipated expiration: 1939-03-21

Description

J. F. BL'AND.

AUTOMATIC STOP FOR DISK'QRECORDS FOR TALKING MACHINES.

APPLICATION FILED IIIAY I1, 1921.

1,41 O, 1 58. Patented Mar. 21, 1922.

- Lil l UNITED STATI-:s

JOSEPH FRANKLIN BLAND, F WINSTON-SALEM, NORTH CAROLINA.

AUTOMATIC s'ior ron DISK RECORDS Fon TALKING MACHINES.

Application led May 17,

' To all 'whom t may cor/ccm:

'f will enable others skilled in the'art to which it appertains to make and'use the same.

My invention relates to improvements in automatic stops for the turn-tables of disk record talking machines, lsuch as Victrolas,

or any other talking'machine in which a rotating disk is used. I

According to my invention I provide a base which is permanently attached to the top of the cabinet of the machine and on which a sliding bracket is mounted. This bracket is provided with a hinged weighted arm which carries a brake pad of felt or other similar material, adapted to engage the turn-table o't' the machine exterior to the periphery vof the disk superposed thereon.

Vhen not in actual engagement as a stop or brake, the weighted arm is normally supported against a stanchion carried by the inner end of the sliding bracket, and said weighted arm is held in the uplifted posi tion by gravity, until the center of gravity of said aiin and the parts carried thereby is displaced automatically by the movement of the tone arm. When the tone arm has almost reached the predetermined limit ot its travel, the weighted arm is pushed outwards and falls by gravity, causing the felt pad to strike the turn-table carrying the disk, thus acting as a brake to stop same without undue shock.

The invention is intended to be applicable to vany of the well known types o1 talking machines on which a disk record is used, and the parts are so arranged that they may be readily attached to or removed from the top of the `boi; or cabinet ofthe machine. A

The device is made adjustable so as to apply it to different makes vof machine, in which therposition of thetone arm varies withinlimits. When'the device is onceset for any particular machine it does not have to be altered with that machine.

The' device is also intended to provide Specification of Letters Patent.

Patented Mar. 21, 1922. i921. se'riai No. 470,322.

for Stopping the turn-table'by hand whenever desired at any time during the rotation of said turn-table, and this may be' done by simply tilting the-weighted arm by hand and allowing it to nfall and to engage the turn-table irrespective of what'may be the position of vthe tone arm with Aregard to the record. Inother words when :thedevice is properly yset andthe weighted arm is raised, it will operate automatically vwhen the tone arm reaches the position at almost the predetermined end otits travel', and may be caused to operate by hand and not` automatically at anytime while the record is turning.

My invention will be more lfully under-Y stood after reference to the accompanying drawings, in which like parts are indicated by similar reference symbols throughout the several views, and in which :-V

Figure l is a plan :view 'of a Victrola machine with the tone arm partly broken away, and with the said arm in the opera.-

tive position for causing the `needle .toengage a disk.

Figure 2 is a similar view to'Fi ure 1,

but shows the tone arm 'in the position for actuating the automatic stop, and' shows the automatic stop in the lowered and operating position. Y

Figure 3 is a side elevation of the apparatus shown in Figure l, parts being broken away.

Figure 4 is a side elevation of the apparatus shown in Figure 2, parts beingV broken away.

yFigure 5 is a `View seen from the yleft of Fig. 1, with theparts Vin the position shown inthat figure.

Figure 6 is a plan view similar to'Figure 2, but showsa modified form of automatic stop; and. Y

Figure 7 shows 'a section along the rline 7-7 of F igure' 6, but'on alarger scale.

AV represents the vcabinet or sound box PATENT orifice.y

used with the machine, which may be of any I make no claim tothe construction and operation of the turn-table or the means for rotating the same.

D represents ythe disk which maybe ot'V any desired size, whether'standard or otherwise. l

' E `represents the tone 'arm' which is pivoted in the usual way to .the sleeveF. The tone arm is provided at its forward end with a T-head Acomprising the sleeve E in which .the goosemeck H is pivoted, which carries the reproducer .l to which `is attached `the fneedleKinV the usual Way. Y

v.Alici the parts hitherto described are preferably of Standard or preferred make and 1in. no sense a part of my invention.

My invention relates `particularly to the automatic sto -or brakingdevice which will nombe descri fd. f Y

" Referring `Iirstto the construction shown in `Figures'l to`5,in which the brake pad is applied horizontally, M ,represents a base plate which is connected to the top of the '.Ilhis bracket maybe provided with a handle nf for convenience in manipulating the same.` Thehracket ismounted to `slide without unnecessary- .friction in the guides M.

`Tlievertical fin N is slotted at its base, as atm", to permit the said fin to slide over the corresponding guide M. The fin N is provided-.with a` forwardly projecting;y ear am* to `whichthe arm P is pivoted, as by the pin y). This arm is weighted at the free end as at P. and isprovidedwith a Wing Q to' which `the brake pad g, of 4felt or similar material, is secured.

rTheadjusting` ofthe device to any ot the different `types of machines now generally in '1.- use is effected by means of an `adjustable.

vbutton R, carried bythe screw .S which en gages the screw threads in the arm` P, and is turned by the knurled h'ead S. In order to setrthedevi.cepennanently for any given machine, a lock nut T is provided to prevent the button R from beiner turned backwards accidentally in any Way. A

A The operationof the device isas follows: Supposingthe weighted i arm P tobe in the lowered position shown in Figs@ and 4, swing` the .tonearm tothe left so that the needle will be in the position at which it is desired to stop: the engagement of the same with the record. The position of the needle at which it maybe desired to stop the disk maybe in orfout. Having determined the position at which the record is to stop relatively to the needle, hold the tone arm in this position', indicated for instance in Fig.,

the turn-table beingrotated, the tone arm under the control of the needle will be graduallly .moved towards the button R.

As this button is reached there will be a gentle contact, first, with the tone arm and then a still further movementot the tone arm to the left will move the weighted arm P so that its center ot gravity will fall to the lett of its pivot, `and the weighted arm will swing down under gravity from the `position shown inFig. 3 to the position shown in Figs. Qand Ll. This will cause thebrake pad q to bear against the surface b `offthe turnftable B,and this pad being pressed `on by the leverage ofthe weighted arm will exert suilicient braking effect to soonbring the turn-table to a stop.

It will be noted that the weight P acts'v at a longaleveragc relative to the stop, and, therefore, a: `comparatively small weight maybe used. This isdesirable so as not to transmit unnecessary shocks to the machine. l After ythcVturn-table has been stopped a new record may be applied and the operation `may .be repeated' indefinitely.

It it is desired to stop the turntable at any time beforeV the automatic action takes effect, it will be sujtiicient merely to swing the weighted arm to the lett by a touch of the finger. lt will then drop under the hand control and will apply the brake as before( f v Y Thus it will be seen that the device may he used to automatically stop the turn-table atA any predetermined.position of the needle relatively to the record. and it may also be caused `to stop thc turntable by hand control at any relative Vposition, of the needle to the record, or whenthe needle is not onthearecord at all. e Y

` Tn the modifications shown in Figs. 6 .and 7, the parts are generally similar to those hitherto described, and the operation of the device is precisely 'the same except that instead ot a braking;r eili'ect by horizontal pressure, of `the brake pad on .the top of vthe turntable, a wedging effect of the brake pad on the edge ot' the turn-table is secured.. This-result is accomplished lby setting the wing Q at `an inclinevinstead'ot at a `right angle to the. arm uP", so that a wedging effect `of the pad Q on. .the periphery bg of the Vturn-table B is secured. This is shown especially in Figure `7, in which the brake is shown in lthe lengaging position in full and yet which will not slip backwards when the brake is applied.

It will be obvious that various other modications might be made in the herein described apparatus, and in the construction, combination and arrangement of parts which could be used Without departing from the spirit of my invention; and I do not mean to limit the invention to such details except as particularly pointed out in the claims.

Having thus described my invention what I claim and desire to secure by Letters APatent of theUnit-ed States is Y 1. A stop arrangement for use with disk record talking machines provided with a. swinging tone arm cyomprising a sliding bracket, a Weighted arm pivoted thereto, a brake Wing carried by said arm, means carried by said sliding bracket for supporting said arm in the raised position, and a stop carried by said arm adapted to be engaged by the movement of said tone arm as the tone arm reaches a predetermined position in its angular movement, substantially as described.

2. A stop arrangement for use with disk record talking machines provided With a swinging tone arm comprising a sliding bracket, a Weighted arm pivoted thereto, a brake wing carried by said arm, means carried by said sliding bracket for supporting said arm in the raised position, and a laterally projecting adjustable stop carried `by said arm adapted to be engaged by the movement of said tone arm as the tone arm reaches a predetermined position in its angular movement, substantially as described.

3. A stop arrangement for use with disk record talking machines provided With a turn-table and a swinging tone arm comprising a sliding bracket, a Weighted arm pivoted thereto, a brake wing carried by said arm provided with a padded brake shoe, adapted to engage. said turn-table exterior to the disk, means carried by said sliding bracket for supporting said arm in the raised position, and a stop carried by said arm adapted to be engaged by the movement of said tone arm as the tone arm reaches a predetermined position in its angular movement, substantially as describe-d.

4. A stop arrangement for use with disk record talking machines provided with a turn-table and a swinging `tone arm comprising a sliding bracket, a Weighted arm pivoted thereto, a brake Wing carried by said arm provided With a padded brake shoe,

adapted to engage said turn-table exterior' to the disk, means carried by said sliding bracket for supporting said arm in the raised position, and a laterally projecting adjustable stop carried by said arm adapted to be engaged by the movement of said tone arm as the tone arm reaches a predetermined position in its angular movement, substantially as described.

A stop arrangement for use with disk record talking machines provided with a swinging tone arm comprising a slidingV bracket, a Weighted arm pivoted thereto, a brake Wing carriedby said arm, a vertically disposed standard carried by said sliding bracket for supporting said arm in the raised position, and a stop carried by said arm adapted to be engaged by the movement of said tone arm as the tone armfreaches a predetermined position in its angular movement, substantially as described.

6. A stop arrangement for use with disk record talking machines provided with a swinging tone arm comprising a sliding bracket, a Weighted arm pivoted thereto, a brake wing carried by said arm, a vertically disposed standard carried by said sliding bracket for supporting said arm in the raised position, and a laterally projecting adjustable stop carried bysaid arm adapted to be engaged by the movement of said tone