US1239693A - Sound-box mounting. - Google Patents

Description

A. A. HUSEB-Y. SOUND BOX MOUNTING. I APPLICATION FILED .IULY I9, I916- Pmmea Sept. 11, 1917.

- ALBERT A. HUSEBY, or. CHICAGO, ILLINOIS.

SOUND-BOX MOUNTING.

Specification of Letters Patent. Patented Sept. 11,1917.

Application filed July 19, 1916. Serial No. 110,042.

To all whom it may concern:

Be it known that I, ALBERT A. HUsEBY,

acitizen of the United 'States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sound-Box Mountings, of which the following is a specification.

This invention relates to sound box mountings for talking machines, and has reference more particularly to that type of mountings which permits the sound box to be adjusted in position so as to play records of either the vertically cut or the laterally cut type.

' The object of my invention is to provide means for automatically and yieldably looking the sound box in both of its adjusted positions so that it will be rigidly retained against displacement and will be prevented fronrrattling or vibrating so as to set up undesirable vibrations which would impair the tone of the machine. 5

Figure 1 is a side elevation of a portion of a tone arm with a sound box attached thereto, in accordance with my invention;

Fig.2 is a view looking toward the left in Fig. 1, the soundbox being shown in dotted lines in the position which it assumes when adjusted to play records having lat- Fig. is a view similar to Fig. l, certain portions being shown in section.

Referring to the drawings, reference character 5 indicates generally a sound box of well known general construction comprising the customary diaphragm 6, 'pivotally mounted vibrating lever 7 .and needle or stylus 8 mounted in the lower end of the lover. The rear wall of the box is provided with a sound-conducting tube 9-in the form of an upturned elbow which is provided at its base with a flange 11 secured to the rear' wall 12 of the sound box by screws 13 or other suitable fastening means. To absorb vibrations between the sound box and the elbow a rubber gasket or washer 14 is interposed between the flange 11 and the rear wall of the sound bo x ,.and a circular member 15, corresponding in shalpe to the flange 11 aud the gasket 14, is clamped between this flange and the gasket by fastening screws 13 and has an upward extension 16 terminating in a tapped head 17 in which is threaded a clamping screw .18 for a purposewhich will be later described.

The tone arm 19, a fragment only of the outer end ofwhich is shown on the drawings, is of elbow shape at its extremity and is reduced in size upon its outer periphery,

crown of the elbow on' the tone arm is provided with 'an upwardly extending boss 22 having a depression in its top forminga seat to receive the lower end of the clamping screw 18. When the parts are assembled and this screw is tightened up the sound box will be firmly clamped to the tone arm without any extensions or projections through or into the sound passage which might interfere with the sound Vibrations and the tone of the machine. This connection between the tone arm and sound box since the screw 18 is disposed in axial alinement with the center of the joint between the tone arm and the sound box permits rotative movement of the sound box relaeral undulations of the sound groove; and

tively to the tone arm from the position lines in Fig. 2, thus adapting the device to both types-of records.

' For the purpose of limiting the'swinging movements of the sound box relatively to the tone arm to an arc-of approximately degrees, the lower end of the tone arm is provided at one side with a shoulder 23 and the upper edge of the elbow 9 is provided with an elongated recess 24 in which the shoulder.23 is adapted to travel, the swinging movement of theisound box being limited in each direction by abutment of the shoulder 23 against one end or the other of the recess 24. I

For the purpose of automatically locking the sound box in its adjusted positions the lower 'edge' of the shoulder 23 is provided with .asmall projection 25 and the recess the projection 25 snugly fits when the sound box is adjusted (to either of its working positions. The member 16 which is made of sheet metal or other similar material is screw 18, which suliiciently resilient to peri'nit a slight separation of the joint between the tone arm and sound box which enables the projection 25 to travel upwardly out from the locking depression "'26 when force is ap pl led to the sound box to swing it about its pivot. it will be obvious that the tension oi" the 1nein ber 16 may be regulated by adjusting; the is always set sulliciently tight to make a snug joint, and prevent vi bration between the sound box and the tone arm. To further lend rigidity to the structure-the rear wall or the sound box is provided near the top with a rearwardly pro jecting stud 27 which snuglj' fits into a groove 28 formed in the face oi? the extension 10., this extension being, for purposes oi economy, n'eierably stamped so as to form a groove therein, as shown.

It will be manifest from the foregoing that l have provided a sound box mounting which is strong, durable and rigid, is relatively cheap to manufacture and serves to hold the sound box firmly united to the sound tube without any extension through or into the sound passage,and which also permits the sound box to be adjusted from a position. parallel with the tone arm to a position at right angles thereto, so that the instrument can be used in connection with both. types of records by simply adjusting the position of the sound box. The details of construction illustrated and described are .arin. and box, and

. jection and a obviously capable of considerable modification and variation without departing from the essence of the invention as defined in the following claims:

I claim 1. In a sound reproducing machine, the combination of a tone arm, a sound box constructed to rotatably engage the outer end of arm, means outside" the sound passage for holding said sound box in opere ative relation to said tone arm but permitting relal ive rotati ve movement between said cooperating means on said arm and sound box for yicldably locking said sound box at the end of its adjusting movement in each direction.

in a sound reproducing machine, the combination of a tone arm having a reduced outer end provided with a shoulder, a sound box having an elbow telescopically and r0- tatably engaged with said end of the tone arm, said elbow having an arcuate recess to receive said shoulder, means for preventing disengagement of said sound box from said tone arm, and means eonnvrising a procorrespondingly shaped depression formed on the opposed faces at the junction of said. tone arm and the sound box whereby said sound box locked in adjusted position with relation to the tone arm.

ALBERT A. HUSEBY.

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