US1414517A - Needle holder for sound-reproducing machines - Google Patents

Description

v E. C.,KUEHL.

NEEDLE H OLDER FOR SOUND REPRODUCING MACHINES. APPLICATION FILED JAN. 10,1921.

1 114,517. Patented May 2,1922.

* omrso snares PATENT orr cs.

ERNEST C. KUEHL, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF '10 HERBERT C.

' LUST, OF CHICAGO, ILLINOIS.

NEEDLE HOLDER FOR SOUND-REPRQDUCING MACHINES.

Application filed January 10, 1921. Serial No. 436,130. I

T 0 all whom it may concern.

Be it known that I, ERNEST C. KUEHL, residing at Chicago, in the county of Cook State of Illinois, having invented certain new and useful Improvements in Needle Holders for Sound-Reproducing Machines, do hereby declare that the following is a full, clear, and exact description of the same. v

My invention relates to needle-holders for sound-reproducing machines, and consists in the matters hereinafter described and then pointed out in theappended claims.

In the accompanying drawing, Fig. 1 is a view, of the device with a needle in place and attached in position on the machine;

Fig-.2 is a view of the device with its sleeveflin section and the interior parts in P 3 f Pg. '3' is-an end View the needle'in section. a

Fig. 4: is a longitudinalj'sectional view on the"1ine4-- 1 ot'Fig'. 1 showing'itlie parts in their positions after a needle inserted;

. Fig. 5 isa cross sectional view on the'line of the device 5-5 of Fig. 4;

Fig. 6 is a detailview of the lever jaw, and Y 1 i Fig. 7 is a perspective view of the device with the sleeve broken away and showing the lever jaw in its position before the needle is inserted.

In the drawing, in which the several views show the parts enlarged for the purpose of clearer illustration, the reference numeral 10 indicates the metallic body of the needle-holder, and 11 a tubular metallic sleeve frictionally engaging the body and forming a permanent casing enclosing the working parts. The body 10 is cylindrical in cross-section, having its' outer end or head rounded and projecting slightly beyond the corresponding end of the sleeve, and its inner end or base is provided with a pin 12 or any other suitable means for at taching it to the stylus-bar 13 of the soundbox 14: of the machine. The body is provided with a central or axial bore 15 providing a needle-hole and having a bellmouth 16; in the wall of the needle-hole the body is provided with an axial groove 17 which extends the length of the bore and is V-shape in cross-section with its apex substantially flush with the outer or enlarged end of the bell-mouth. Opposite the groove Specification of Letters'Patentl Patented May 2,1922.

17 the body is provided with a radial channel or kerf 18 leading from the bore out wardly throughthe perimeter ot'the body and extending from its rounded head to a point adjacent its base. The kerf extends axially the length of the bore,' and at their inner ends adjacent its base the body is provided with a crossbore 19 which is slightly larger in diameter than the width of the kerfj'and formsa chamberto receive a coilspring 20. A lever 21. is pivotally mounted in the kerf; its head or jaw 22 substantially respond withgvthe shape of the outer endof I the outer end of the'kerfand projects i slightly intothe bore 15,'and the end of'theaw is rounded'at its outer portion to corthe body lO afn d is beveled inwardly at its inner portion to form a cam-surface 23 in correspondence with "the flareof the bell'-' mouth 16. ""Th'e inner'endof the lever is,re

duced' or "cut-away" along its inner edge to form a comp-aratlvely narrow" finger 24 which rests upon the outer end o'f the spring to compress'it; The lever-'21 is provided on 5 its outer edge with a lateral pair of wings; 25 formlng-a pintle bearlng 1n seats formed by'a crossegroove26 cut at the margins: of

held in their seats so that while the lever is free to swing upon its pintle it is thus held against displacement. The finger 24 of the lever is disposed at a slight angle inwardly from the line of the outer edge of the jaw and toward the axis of the body, to allow sufficient play of the parts when the jaw moves inwardly into the bore under the stress of the spring when the needle 27 is removed. I

When the parts are assembled the sleeve forms a permanent casing for the parts and the tension of the spring throws the finger of the lever out to its limit defined by the inner wall of the sleeve, and throws the finger of the lever to compress the spring all as shown in Fig. 4, and when the needle is in place between the bore and jaw the tension of the spring causes the jaw to crowd the needle into the ii-shaped groove 17, and the walls of this. groove together with the inner edge of the jaw provide a triangular seat tl'or the needle as shown in Figs. 3 and 5, with the result that a round needle is held in its seat securely against vibration or movement in any direction. The needle is thus automatically held in place upon the mere act of inserting it in ,its hole, and uponits withdrawal or removal the tension of the spring rocks the lever to theposition shown inFig; '7 to throw the cam-face of the j aw into the path of the nextneedle that is inserted.

By forming the lever so that its portions on opposite sides of its pivot are arranged at an obtuse angle each portion has an inward departure away from the sleeve when the other portion abutsagainst the sleeve, and by this arrangement I provide a needleholderthat automatically secures the needle in its position upon its. mere insertion, and without any further effort orattention upon the part of the operator. Also, theispringpressed lever acts as an absorber thatreduces the scratching and metallic sounds frequently produced by 'phonographs, and in case a scratched-or worn record, is played. by thernachine it avoids reproducing the sounds due to such defects; it takes up or absorbs the shocks on the needle caused by defective portions of the record, and reduces the sounds that usually are caused by them.

I claim: 1. A needle-holder tubular sleeve forming a permanent casing,

for sound-reproducing machines comprising a cylindrical body and the body having an axial bore'and kerf, a cross-bore at the base of the ker'f, and an opposite pair of seatsat the. sides oi the kerf, a spring in the cross-bore, a lever in the kerf having a pintle held in the seats by the sleeve, the opposite portions of the lever being arranged at an obtuse angle forming a jaw to engage the needle and a finger compressing the spring.

2. A needle-holder for sound-reproducing machines comprising a-fcylindrical body and tubular sleeve forming a permanent casing, the body hav-ing any axial bore and kerf, a cross-bore atthe base of the kerf, an

oppositepair of seats at the sideso'f the kerf, the borehaving; a bell-mouth with a V V-shaped groove opposite the kerf, a leyer.

in the kerf having a pintle held in the. seats by the sleeve, the outer end'of the lever forming .a jaw to close, the .V-shaped; groove to form atriangular seat for; the needle and its inner end} being reduced in width and;

beveled inwardly, and aspring in the crossbore compressed by the reduced-endloi the lever. i j

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