US1170802A

US1170802A - Sound-reproducing machine.

Info

Publication number: US1170802A
Application number: US76890513A
Authority: US
Inventors: Forest Cheney
Original assignee: CHENEY TALKING MACHINE Co
Current assignee: CHENEY TALKING MACHINE Co
Priority date: 1913-05-21
Filing date: 1913-05-21
Publication date: 1916-02-08
Anticipated expiration: 1933-02-08

Description

mosca FOREST CHENEY, or CHICAGO, ILLINOIS,

y CHENEY TALKING MACHINE4 Y or ILLINOIS.

.To all whom it may concern:

Be it known that I, FOREST CHENEY, a'

citizenofI the United States, and a resident of Chicago,inthe county of Cook and State of Illinois, have'invented certain new and useful Improvements in Sound-Reproducing Machines, 'of vwhich the following is a l,

full, clear, and exact specication.`

My Invention 1s concerned with sound reproducing devices,.and primarily with thek construction and mounting ofthe swinging fying horn, which horn is ordinarily rigidly mounted, and must have a connection withv the tone arm by which the latter can swing in a horizontal plane to permit the needle' to move from the edge to the center of the disk record, and which must also'be capable of swinging verticall to permit the disengagement'of the need e from the disk.

One feature of my present invention consists of a speci'iic modification of the generic application No. 682,989, filed. March 1l, 1912, and in the application of said invention tothe tone arm, said invention being specifically shown in the aforesaid application, No. 682,989, as appli'edto the stationary `amplifying horn.

Another feature of my invention consists in the employment of a novel spring adjustment for the tone arm by which the Weight of the outer end thereof and of the soundv box 'can he counterbalanced or neutralized, thus regulating the pressure ofthe needle upon the diskI i v A third feature of my invention' resides in the novel mounting of the tone arm upon the easing to which the amplifying horn lis connected.

To illustrate my invention, I annex hereto a sheet of drawings, in which the same refr erence characters are used to designate identical parts in all the figures, of vvhiCh`,-

' Figure 1 isa top plan View of a' sound-.`

u reproducing machine having lmy invention applied thereto; Fig, 2 is a longitudinal section through the tone arm on an enlarged scale; Fig. 3 is a detail of a portion thereof.

p vSpecification of Letters Patent. Application filed May 21, 1213. Serial No. 768,905.

y AssIeNomnY MESNE ASSIGNMENTS, To-l COMPANY yor CHICAGO,V ILLINOIs 'A CORPORATION SOUND-REPRODUCING MACHIIIE; i

raum-,eenen 8,1916.

Fig. 4 is--a detail showing the tone arm lifted to' disengage the needle from. the record;

and Figs. 5, 6, 7, 8 and 9 are vertical sections v VIIIl-VIII and through the tone arm on the lines V-V, VIffVI, VII -VII, IX, respectively,`of'Fig. 2.

I have found that, .for the reasons fully set forth in `my aforesaid application No. 682,989, the amplifying part of a sound-reproducingmachine produces a much more perfect reproduction .of the tone vquality of the voices and instruments 'making the record if,instead of employing an ordinary l tapered horn or sound-amplifying device, the usame be made up of a plurality Vof sectlons each having a plurality of flat, lrectangular vibrating walls parallel to a common axis, with'the walls of eachsection spaced farther apart than those of the preceding section, and in my. aforesaid application, lI

have shown these sections as applied to the construction of the amplifying horn only,

n and not to the tone arm." invention in orchestral sections shown in my In my present application, I apply the same principle to the construction ofthe" -tone arm; and in Fig. 1, 10 indicates the' top of thecabinet, While 11 indicates the customary rotating disksupport, and12 indicates my improved tone' arm, which must swing' from the full-line position to the dotted-line position in playing a record.' As will be apparent, the sound box 13 has its customary location on'the end of the tonev jarm, and is connected with the main portion of said tone arm hy the customaryelbow 14, which is fitted over the cylindrical end 15 of the tone arm proper. Immediately adjacent this short 'cylindrical end l5 is the-section 16, which will be seen to have the design. of a regular-Octagon in cross section, and which 'is preferably constructed of somesuitable sheet metal." The eight Walls of the section are preferably all'rectangula'r, of the saine size, parallel to thecomm'on axis, -and are however, 1s O f increased diameter andl is conl yparallel to the opposed walls, so that the air l 18, which l have.

l taming the saine cross section,

nected to said section l'by the gentlecurve found to be essential in properly 'connecting these sections to prevent; any disturbance of the vibrations in' passing .from one section'to another. The section il' merges through a similar curved portion to the similar section 1.9, which in turn merges through a similar curved portion into a similar section 20, each successive section increasing in diameter, although reas is clearly shown in Figs. 5 to 9. The inal section 2l is preferably curved through an angle of ninety degrees, forming an elbow, and the lower end'thereoi" has a flange or enlargement 22 spherical in its outline, and adapted to receive at opposed points set screws 23, which are threaded through opposed lugs or bearings 24 in the upper portion of the ring 25. With the connection shown, 'the tone arm is free to vibrate in a vertical plane as much as may be necessary to raise the needle out of contact with the disk.

The ring 25 preferably has an oiiset 26 therein, so that the internal diameter of the lower partis of approximately the diameterv of the section 21, as itis not desirable to have a sudden increase in the bore of the passage. The external part of the lower portion of the ring 25 is threaded, as shown, and engages the internallythreaded flange 27 of the collar 28, which is screwed on the top l0 of the cabinet, as will be readilyapparent. This threaded connection between the ring '25 and the collar 28 permits the tone arm to swing in a horizontal plane as much as may be necessary to permit lit to move from the full-line to the dotted-line position of F ig. Land that without any material 'change in the vertical position of the soundsbox end of the arm'.

ln my invention l provide a very etlicient regulation for the pressure of thencedle on the disk byv placing the arm 29 on*l the ring 25 and threading through said arm a set screw 30.. The head of the screwis provided with a lug 3l, and an opposed lug' 32 carried by the spring 33 coperates with l the -under side of the 'section 20of the tone arm, and a helically-coiledl expanding spring 38 is interposed between said lugs. By turning the screw 30 up or down, the pressure of the needle of the sound box upon the disk can be varied to malte it as light or heavy as is desired, and when the desired pressure -is attained, l preferably set the nut 34 and the' lock nut 35 cooperating with the screw 3Q on the under side of the bracket 29 so that the precise adjustment will be maintained without any change.

`While l have shownjand described ini vention as embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it isV constituting a collar generally wall and to the portion, said tone combination with an apart than those of the preceding section.

2. In a sound-reproducing machine, a tone arm made up of a plurality of sections, each section composed of eight equal sized itat vibrating walls, Aeach wall beingparallel its opposed wall and to the common axis so that the cross section of the arm is a regular Octagon, the opposedwalls of each sec? tionbeing spaced farther apart than those of the preceding section.

3. In a sound-reproducing machine, a tone arm comprising horizontal and vertical portions connected by an intermediate curved portion, the horizontal portion of said arm being .made up of a plurality of sections, each sectioncoinposed of a plurality or" ilat vibrating walls, each parallel to its opposed common axis, the opposed walls of each section being spaced farther apart than those of the'preceding 'sections 4. ln a sound-reproducing machine, a tone arm comprising' horizontal and vertical portions connected by an intermediate vcurved arm throughout being vmadeup of a plurality of sections, each section composed of a plurality of fiat vibratu ing walls each parallel to ts opposed wall and to the common axis, the opposed walls of each section being spaced farther apart than those of the preceding section.

5. In a sound reproducing machine, the

interiorly-threaded collar secured to and projecting above the up per horizontal surface of a support, of a ring screwed into said collar and adapted to turn therein, said ring having anv upperl portion of larger interior` diameter than the lower portion thereof, a tone armhaving its said ring so as to swing in a vertical plane,

the inner surface of the larger end of said tone 4arm being in register with the inner surfaceof the lower portion of said ring and withan opening through said support, a lug projecting laterally from the. upper portion of said ring beneath said tone arm, and a lspring interposed between said lug Vand the tone arm. v p

6. In a sound-reproducing machine, the combination awith an interiorly-threaded collar secured to a cabinet, of a ring screwed into the top of the collar and adapted to turn easily therein, a tone arm having its and a helically-coiled spring interposed be- 'larger end pivoted in the top of the ring so In witness whereof, I have hereunto set as to swing in a vertiea'l'plane, an arm on .my lhand. and eixed my seal, this 19th day' the ring, a screw threaded through the arm of May, A. D. 1913. e having a lug `on itsiipperl end, an opposed FOREST CHENEY. [1.. 8.] 'A 5,1ug engaging the under side'of the tone arm, Witnesses: Y v

' JOHN HOWARD MCELROY, tween said lugs, for the purpose described. MILDRED ELSNER.