US1092552A - Sound-box. - Google Patents

Description

vW. W. ZAGKBY.

SOUND BOX.

ION FILED JULYes, 191a Patented Apr.

APPLIOAT W To ir-J.

.WILLLAM W. ZACKEY, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 0F FORTY- NINE ONE-HUNDREDTHS TO CHARLES B. HEWITT, OF BURLINGTON, NEW JERSEY.

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Specification of Letters Patent. Application filed July 25, 1913. Serial No. 781,055.

Patented Apr. 7, 191a.

ful Sound-Box, of which the following is ay 7 specification.

This invention relates to sound boxes for sound recording and reproducing machines, and has for an object to provide a diaphragm and mounting therefor, whereby not onlyis the sound reproduced in a desirable volume,

' but it is also perfect in quality and tone bephragin substantially floats within the box-,-

ing free from metallic, grinding or scratchingsounds. r

It has for a further object to provide a sound box-in which a portion ofthe diaand .operates in conjunction with a flexible member formed of a suitableiabric whereby a sensitive and delicate means of transmitting sound waves is provided.

It has for a further object to provide a novel mounting for the stylus bar which operates 1n congunetion with the novel d1aphragm construction to produce a balanced.

' condition which materially increases the et- I"ective action of the diaphragm in the reproduction of sounds.

It further consists of other novel ieatures of construction, all as w ll. be hereinafter Jfully set forth.

. Fig. 3 represents a plan of a portionof the sound box showing details of the stylus bar.

For the purpose of illustrating my inven tion, I have shown in the accompanying drawin s one form thereof which is at nos 21? V i cut preierred by me, although it is to be un derstood that the various 1nstru1nental1t1es of which my invention consists can be variously arranged and organized and that my invention is not hunted to the precise arrangement and organization of these instrumentalities as herein shown and described.

Figurev 1 represents a perspective of a sound box embodying my invention. Fig. 2 represents'a section on line to a: of Fig. 1.

mounting. Fig. drepresents side elevation of the part shown 111 Fig. 3. Flg. 5 represents a perspective, of one of the diaphragm springs. spective of one of cars.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings: The sound box embodying the principles of my novel invention consists,

Fig. 6 represents a per the stylus bar supporting ferential flange 2 thereon forming a compartment 3 from which the sound waves are discharged through the opening 4-, preferably .disposed at substantially the center of the body 1. The,compartment 3 is adapted to receive. a disk 5 of mica or like material which serves with other adjuncts the purpose of a diaphragm for the otherwise open in the present instance, of a body member 1, having an annular circumendof the body 1, and it will be noted that v the said disk is located within and encircled by the flange 2.

(Sdesignates a fabric preferably of sill: or material of like texture, which is stretched across the flange 2 and completely closes the con'ipartment 3. This fabric 6, in the presentinstance, is stretched with drum-like tightness as shown in Fig. 2, while the disk V5 is held in close contact with the said fabric by means of the fastening device 7, which is preferably a screw threaded into the, outer bentend of the stylus bar 8. Thus the fabric member 6 and the disk 5 form t gether a flexible sensitive diaphragm capable of transmitting and reproducing sound WitVGS.

Q designates a split ring adapted to en circle the flange 2, and securely clamp the edges of the falu'ic (3 against the outer walls oi the flange 2. The ring 9 is provided with cars 10, and a suitable clamping bolt 11, in ordcr'to draw the ring 9 into close contact and maintain the parts in their adjusted positions.

a The slylus'bar 8 is fixedly secured to a fastening device. It will be noted that the ears 14; are disposed in opposite relation to each other, so that one of the lugs 15 is adjacent one side of the ring 9, while the other lug is adjacent the opposite side.

. l7 designates a pair of springs preferably formed of spring wire and each having an eye 18 arranged in oii'set relation to the body portion of the spring fora purpose which will now be described. The springs 17 are respectively carried by the fastening devices 16, and the end 19 of each passes through an opening 20 in the spindle 12, so that the action is to return the stylus bar 8 to its normal or neutral position, after a movement of the diaphragm members. Attention is directed to the factthatone of the springs 17 has its offset portion turned in one direction, while the other spring has the offset portion turned in the opposite direction, and the tension of the springs may of course be regulated by the nuts 21 of the fastening bolts 16. Thus movement of the diaphragm members in one direction is counteracted by the action of one of the springs, and movementthereof in the opposite direction is counteracted by the other spring, the tendency thereby being to balance the action of the diaphragm and make it possible to transmit a succession of sound vibrations each of which is clear, complete, and a faithful reproduction of a particular sound grooves, while the needle used in connection with the opening 22, is for use in connection with the laterally undulating. groove. In either case the sound wave is accurately transmitted to the diaphragm, and is reproduccd distinctly,

It will be noted that the disk 5 is in close contact'at all points with the stretched fabric G, and is maintained entirely out of confact with the metal of the box, thereby being free to vibrate throughout its entire surface and providing a reproducing means which is extremely delicate and sensitive, one which eliminates entirely any metallic sounds or scratching noises usually accompanying the reproduction of sound Where the diaphragm is fixed .at its edges by portions of the sound box itself.

It will now be apparent that I have devised a complete unitary structure, simple in construction, effective in operation and of such. a sensitive nature as to reproduce a sound the tone quality of which cannot be distinguishedfrom the original sound.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a sound recording and reproducing maehine a sound box, a diaphragm operatively mounted therein, an arbor suitably mounted in a bearing in constant relation with respect to said sound box and adapted for rotary movement, a stylus bar fixedly carried by said arbor, and connected with said diaphragm, and independent springs suitably mounted and each acting torsionally and axially upon the said arbor, on portions thereof on the opposite sides of said bearing, in opposed relation, and tending to rotate said arbor in opposite directions.

2. In a sound recording and reproducing machine, a sound box, a diaphragm operatively mounted therein, an arbor suitably mounted in a bearing in constant relation with respect to said sound box and adapted for rotary movement, a stylus bar fixedly carried by said arbor and connected with said diaphragm, independent springs suitably mounted and each acting torsionally' and axially upon the said arbor on the opposite sides of the bearing thereof in opposed relation-and tending to rotate said arbor in opposite directions, and means for independent adjustment of said springs for balancing the tension thereof on said arbor.

3. In device of the character stated, a

body member having a centrally disposed opening therein, a diaphragm operatively connected to said body member, a stylus bar connected to said diaphragm, a spindlesecured to said stylus bar and having an opening adjacent each end, a bearing for said spindle, a spring seated in each opening, an eyelet on one end of each spring, oil-set therefrom and oppositely disposed with respect to each other, and adjusting means oppositely situated and passing through said eyelets for varying the tension of said springs.

4. In a sound recording and reproducing machine, a sound box, a diaphragm operatively mounted therein, an arbor, a support in which said arbor is mounted and adapted for rotary movement, a stylus bar fixedly carried by said arbor and connected'with said diaphragm, and means, acting torsionally directly upon said arbor in opposed relation. and tending to rotate said arbor in opposite directions to adjust the axial position thereof and acting to maintain the same frictional engagement of said arbor with said support at all times.

5. In a sound recording and reproducing acting torsionally and axially upon said m.-

Ii,092,55.il

atively mounted therein, an ar ior suitably maintain the same frictional engagementof supported. and fixedly carrying a stylus b211- said arbor with its support at all times. 1 connected with said dioploi-agm and means VVILLlAM W. ZACKEY.

Witnesses C. D. MGVAY H. M, LAFFERTY.

llor in opposed relation and tending to rotate machine, a sound box, a diaphragm operthe axial position thereof, aml acting to I said arbor 1n opposite directions to adjust]

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