US1212872A - Automatic brake mechanism for phonographs. - Google Patents

Description

F. H. ADAMS.

AUTOMATIC BRAKE MECHANISM FOR PHONOQRAPHS. APP-LICAIION FILED. MN- 22. I915- RENEWED DEC. 1.4916.

Patented Jan. 16, 1917.

NORRiS FEYERS, W-CH LITHO.. WASHiNGTON. D Cu "ED sTATEsPATENT DFFICE FRANK H. ADAMS, or CLEVELAND, oI iIo.

'tion;

AUTOMATIC'BRAKE MECHANISM FOR PHONOGRAPHS.

, Application fi led'ianuar 22, 1915, ste m; 3,673. Renewed December 1, 1916. Serial No. 134,500..

To all whom it may concern Be it known that I, FRANK H. ADAMS, a States, residing at Cleveland, inthe county of Cuyahoga-and State ofOhio, have'inve nted a certain new and useful Improvement in Automatic Brake Mechanism for Phonographs, of which the following is a full, clear,

The invention is adjunctive in character andis especially adapted for use in connection with disk phon'ogrfap'hs, and may be applied to any disk phonograph without involving Ianychange in any part of said phonograph.

One'object of the invention is to provide a cheap and easily applied device which will automatically stop the phonograph when the playing of a record thereby'has been completed. g l

Another object is to provide a stopping device in a form such that it m be easily and ,quickly adjusted to perform its functions w th any record regardless of the distance between the c'enterof the record disk and the :point' thereon at which the reproducing grooves end. 7 I i Another object is to provide a stopping device .in a form such that it does not interfere with utting arecord on or taking it from the p onograph turntable,

The invention consists in the construction and comblnation of parts shown in the drawing and hereinafter described and pointed out definitely in the appended claims.

' In the drawing, Figure '1: is a plan view of the invention applied to a phonograph; Fig. 2 is abottom view ofthe device; Fig. 3 is a vertical sectir through the outer part of the stop. mechanism; and Fig. fl is an elevation of the devic and so muchof the phonograph as cooperates therewith.

The application of this invention to, and its use with, any disk phonograph, does not involve any change whatever in the construction of the phonograph itself, although the said invention is caused-to be operated by stain partsof said phonographf The parts l h pho aphwhich coijp'elate With invention include the turntable 3 upon which adisk record 4 may be supported, the tone arm5 which is mounted to swing freely upon a vertical axis, andsome'part carriedby the tone arm, preferably the needle 6. An arm '10 extends horizontally over the turntable and the disk record thereon from one side Specification of Letters Patent.

and exact descrip= witheach other Patented-Jan. 16, 1917.

to a point: beyond the place Pat which the reproducing grooves on the disk record will end. A spring-actuated brake'lever 121s pivoted on a vertical pivot ad acent to the edge of the turntable and in such position that when released from restraint the brake' lever, actuated by its spring 1l,'will swing is a finger 14: which is adapted to enter a notch 13 that is formed in the arc-shaped edge of the said arm 13. The arm 10 is provided near its free end with a longitudinal slot 10. A stud 16 is slidable in this'slot and may be fixed to the arm at any point thereon within its range of travel. In the particular construction shown the part of the stud which passes through this slot is threaded to receive a nut 17. By tightening this nut the stud may be secured to the arm at any desired point thereon. A cam 18 is' pivoted to the projecting lower end of the stud, and this cam is always in contact with an edge of the catch lever near the outer end thereof, 20 which projects into the path of some part of, or attachment to. the swinging tone arm 5. Preferably this finger projects into the path of the needle 6.

The described device operates as follows: lVhen a record disk 4: being put onto the turntable the arm 10 will be in the position indicated by dotted lines in Fig. l which shows a part of said arm. lVhen the record disk is'on the turntable the-arm will be swung to position shown by full lines in the catch lever lat will be moved by the spring 11 so as to push the catch finger 14 into the notch 13 and thereby the armlO will be held in the stated position. Then the stud 16 will moved along the "arm 10, as

required, tobring the "end of the 'trlp finger 20 directly over a part of thefdisk'record on which the non reproducing grooves are 13 of a bracket 15, which is.

Fixed to this cam is a trip finger which are formed on each record disk for the needle to travel in after the record has been played. lVhen this trip finger has been properly positioned, the stud maybe fixed to the arm 10 by screwing down the nut 17.

As the record is being played the tone arm.

will be gradually swung toward the center of the turntable, the needle 6 traveling in the reproducing spiral grooves of the record. Just as the needle passes out of these reproducing grooves and into the other nonreproducing grooves, it will engage the trip finger 20 and move it so that the cam will move the catch lever 14 and thereby withdraw the catch finger 1% from the. notch 13. Immediately thereafter this arm, actuated by its spring 11, will swing toward the position indicated by the dotted lines in Fig. 1; and, of course, the brake lever 12 will also swing until its braking surface engages the periphery of the turntable and stops its rotation.

In the specific pivot stud 21 on which the arm 10 is pivoted to the bracket arm 13, extends down a considerable'dist-ance; and the spring 11, which is a spiral spring, embraces it and has one end connected with the bracket 15. The other end is bent up so as to engage the edge of lever 14. Therefore, this one spring actuates both the catch lever and the swinging arm 10,-and this because after the spring has moved the catch lever as far as it will go relatively to said arm, it will continue to exert its force on the arm itself.

It is to be understood that the specific con struction shown, while the best embodiment of the invention known to me, is merely one specific form of an invention which may be embodied in many different specific forms. The fundamentally novel feature of the invention is the arm which extends over the record and carries a movable trip finger which projects into the path of some part carried by the tone arm of the phonograph, and is adjustable lengthwise of said arm so that it will 'be engaged and moved with the result of causing the brake to set when the negdle reaches any desired part of the recor Having thus described my invention, what I claim is v 1. A stopping attachment for disk phonographs of the type having a rotary turntable and pivoted tone arm, comprising in combination a pivoted arm adapted to extend horizontally over a part of a disk upon the phonograph turntable, a spring for swinging said arm away from said position, restraining means preventmg the springconstruction shown the induced movement of said arm, a brake for stopping the phonograph which is moved in the brake applying direction by the springinduced movement of said arm. a trip linger carried by said arm and adaptedto project into the path of a part of the phonograph which is carried by the tone arm thereof. and means whereby the trip linger by its movement releases said arm from said restraining devices.

2. A. stoppingattachment for disk phonographs .of the type having a rotary turntable and pivoted tone arm. comprising in combination a pivoted arm adapted to extend horizontally over a part of a disk upon the phonograph turntable, a spring for swinging said arm away from said position. restraining means preventing such spring induced movement, a brake for stopping the phonographwhich is moved in the brake applying direction by the spring induced movement of said arm, a trip finger which is adjustable lengthwise of said arm and adapted to project into the path of a part of the phonograph which is carried by the tone arm thereof, and means whereby the trip finger by its movement releases said arm from said restraining devices.

3. A stopping attachment for disk phonographs of the type having a rotary turntable and pivoted tone arm, comprising in combination a pivoted arm adapted to extend horizontally over a part of a diskrecord upon the phonograph turntable, a

bracket arm to which said arm is pivoted, which bracket arm is provided with an areshaped edge in which there is a notch, a catch lever pivoted to said arm and having a finger adapted to enter said notch, a cam pivoted to said arm in position to engage with said catch lever, a trip finger connected -with said cam and adapted to project into the path of a part of the phonograph which is supported on the swinging tone arm thereof, a spring acting to swing said arm away from its initial position and a brake adapted to be operated by the spring-induced movementhof said arm, for stopping the phonogr p 4. A stopping attachment for disk phonographs of the type having a rotary turntable and pivoted tone arm, comprising in combination a pivoted arm ada ted to extend horizontally over a part 0 a disk record upon the phonograph turntable, a bracket arm to which said arm is pivoted, which bracket arm is provided with an arc-shaped edge in which there is a notch, a catch lever 'tone arm thereof, a spring acting to. swing said arm away from its initial position, and a brake adapted to beoperated by thespring induced movement of said arm for stopping nation a pivoted arm adapted to extend horizontally over a part of a disk record upon the phonograph turntable and'a brake arm rigidly fastened to said swinging arm, a spring acting upon said arm to swing it .away from the position stated and to a position. such that the brake arm will engage with the periphery ofthe' turntable, means restraining said arm from moving in the direct-ion which it is impelled to move by said spring, and a" trip finger carried by said'arm'and adapted to project into the path .of a part which is carried by the swinging tone arm of the phonograph, and means whereby the movement of said trip finger will disconnect the swinging arm.

from said restraining devices.

horizontal arm whose edg 6. A stopping attachment for disk phone graphs of the type having'a rotary turntable. and pivoted tone arm, comprising in com-t binhtion a. fixed bracket adapted to'be 10-,

cated outside of said turntatg'e andhaving a and is formed with a notch, a spring actuated arm pivoted to said bracket arm, a

brake fixed to said pivoted, arm, a spring actuated catch lever mounted on said swinging arm and provided with a finger adapted to enter said notch, a-cam stud carried by and adjustable along said swinging arm, a

is arc-shaped cam pivoted on said stud in position to engage a part of said catch lever, and a trip nger fixed to said cam and extended therefrom to a position such that it may be en-

Images