US948314A - Composition for sound-records and other objects. - Google Patents

Description

J. C. ENGLISH. COMPOSITION FOR SOUND RECORDS AND OTHER OBJBO V y APPLICATION FILED IAB. 24, 1905. 948,31 4.

Paeate Feh, 195,0.

INVENTCR ari-asin JOHN C. ENGLISH, .or cAMDENgNnWiJERsnY, AssmNoR'To-yrc'ron "iarljxrNGm/iaomiin' -.-coMrANY, A-conrone'rron oF'Nnw JERSEY.

e' coMrosITIoi-r. roze soUND-R'nc'onns AND-orner osmosis;

Specification ofrL'ettei's Patent.. I vnizen'lzcd Feel); Apji'iiationaiednareii b4; 1905. .serial No. 251,874. i'

'To all whom it may concer-n:

vented certain new 4and ',uscful I .in'provementsA in Compositions for 'Soundliecords and other Objects.

In the manufacti'ircof soundirccords, the

requirements of the compounds which forni.

the body of the records and the reproducing .surface thereof, involve. many' .coii'litioiisl affecting the'action of the .reproducing needle u on the rccordin thezreproduction. of soun s. A moniri,,theserequirements'are toughness, or' frceldomiroin; cracking and warping durability, or resistance tothe action o thei'ieedle, which has a tendency to wear the surface or grooves of the record as the saine passes through Asaid grooves, fine,

ness of texture ofthe material; which, ifl coarse or gritty, has a. tendency to grind 0r abraile theneedle to' an unduc'extent, and

constancy in a 'degree hardness under all conditions of temperature and moisture to which a commercial "reoord would ordinarily be subjected. Ordinarily, inV .the-

manufacture of sound records made ofcouipositions of shellac, a body pigment or filler,

the use lof guni slicllac givesa toughnesswhich has, up to the time of this invention,

not been capable of being supplied by any 'other material or gum. The .toughness .of

varnishes, when mixed with body materials or fillers, is due to the oils which the varnish contains, andowing to the resencue-,of-

these oils the record is much less urable,.re requircsinuch' eater time inmanufactnre,

and is liable to' vecome distorted afnd warped,-

to the greater viscosity ,i of the 1 owing varnish.

of s ellac, which, in order to produce t e best results, is usually about forty` .percent byfwcifrht, of the total'ainountof thegmixture. llhe' reduction. of this amount of shellacin these mixtures renders the record more brittle and liable tovcrack, while at the saine time the abrasive effect upon the needle is greatl increased,

The object, t ercfore, of my invention is to produce such a composition oi' mixture for use .in sound records, and other objects,

used, but will .also havedistinct advantages 'over theesame. -A .4 .1...-

Guin shellac, when 1n itspurest--form and in consistency and color, und it is'th-e aini of manufacturers of record to obtain shellac earthy material and =.piginents," require duce the requisite adhesive-,purpose and toughness to the' composition. 'ln thee-usc -wlxiici soun records and other objects -req'iiii'ring niatei'ial vhavingt-he= saniez'characteristicsare made.

specificationY is -i lustrated 'a @soundrecord l o. tablet of the-disk-ty e 4with the namesl of'- Heretofore ,it 'liasl been` found that 'm'ixtures for record material containin ,-vbody' material, such as clay, metallic cxis, .andi similar powders'fandpigments, require an; com aratively large quantity orgper'cei'itafe of certa-'1n hydrocarbons, such-asnitro-naph'-A ne form of the composition WhichiI have found to be especially satisfactory is a, mixture of about ten per cent. of nitro-naphthol to ninety per cent. of 4shellac.v This mixture, when -combined with the body material or filler, is-used in the ratio of-about twenty highest grade, resembles well seasoned glue y silica, metallic oxidshand .other cheap of -in'y improved composition, the einboilij ,nient of. these materials provides a ,niuch sjioio.

.which will not only. have all the advantages i i of the` mixtures of shellac and the' different body inateiials, whichhave heretofore beenl as .near to this standard 'as possible. 'Of j .course shellac, .when receiycdby the users'.

in the regula'rooui-se'of tradefvaries con.. 'Siderably in .the'texture Aand quality, and

z. The object, therefore, ofimy invention is toi' enerall 'improve thedmaterial froi'n- In the' drawinv forming apart of thisf-g fi 95 the ingredients inscri edthereon', although@ l it is obviousthat my invention-'is not limit# .5., 'ed toany particular shape or type oftab'let. Briefly, my.inventioncomprises' the 100 .tholg rbeta-'naphtholg nitro-benul, which I` have found readily'=unitev with shellac and l' ,form asolvent therefor by. the -id' of the" 4 ap lication o-heat.

percent. of saidimixture to. eighty `per cent. of said body material or-filler. It will thus be seen that itis necessary to use only about;

eighteen parts in a hundred of s h'ellac in the resultant com osition, instead of forty parts in a"hundr which has heretoforeI-beetl* necessary. -lt vwill thus' be seen that' .the

amount of s hellac, which is the -Inost eirpensive part of the .record materia-Itas greatly reduced, and owin to this reduction in'jthe amount of shellac t e slight variation in the amountrequired `for different body materials, or fillers, will not be so noticeable.

AOf course it is obvious that I 1am not limited to the use of niti'o-naphthol in combina-.

tion with shellac or similar gums,` butl I may .use otherhydrocarbon derivatives of the results produced are the same as with I am aware that shella'c isfclaimedfto be lsoluble in benzoin, and. after tirst` h'aving been treated with borax', *but the c mposi tion which I have invented is entirely dis`=' tin'ct from'. this, as I combine the hydrocar-v bon which I u'se .directly with ftli'e shellac l without any interinediatelsubstace whichl will produce'the soluble qualities, vOiieof the -particular advantages'bf. my improved ycompositionresides in tl 1e .fact that the addition of nitro-na )hthol and simi.

lar hydrocarbons, renders t e shellac considerably more iluidunder -the iniiuence of heat, and," therefore, not -only allows. the body o r filler 'material tc be more iiitiinatel mixed therewith, but also allows a muc sha1l er and accurate record to be produced.

byt ie pressure 'of the matrix u on'tlie'sur` face'of the-blankffrom which t e record is .molded or.v stamped, Owing also to -this greater fiuidit a considerable saving -of time is elfectedI of tlie"'=`.`reco1'd blank to completely enter ald the recesses and minute parts of the groove.

As above" referred to, further advantages vof my improved composition reside in .the fact that the reoordmaterial is made much "touglierarid more lasting, the characteristic of` brittleness being considerably reduced by the addition'of nitronaphthol, and similarl hydrocarbons. I have found that the addi.- tion of nitro-naphthol renders-shella'c of. a morel flexible and whatl might be called a leathery consistency, without in:4 any way the solidit 'or elasticity ofthe substance, or vit is wel known in the mannfac- 'ture'of talking machine records, Athat the is'l solu le.

in lstamping the recoi'ds, 4as itfreqtiires a shorter time for the material.

' 'the naphthalene series.

8. In a composition for records for talk'" 'greater body of. the material-used and the elasticit of the substance employed, the.l

more e .cient will be the effect-upon the stylusi-or needles ofthe reproducingy median-- isin. This,.therefore, is an additional advantage 'of m .improved compound, inasmuch Having thus described'my invention, Idol -not wish to. beunderstoo'das being limited to i the precise .ingredients of my improved.' 'compound herein Set `forth, but .the 'same ma be varied according to choice and specia requirements, without depart-ing from the spirit andscope' of my invention, but What I claim anddesire to protect by Letters Patent, is,

las the soli4 ity andelasticityis inno way reh the record i'smadeless brittletliaii 1l In a composition forA molded objects,`

the combinationwith a suitable body material or iiller, of shellac and a hydrocarbon in which said shellac is soluble.

2. In a composition for molded obj ects,V the coinbinationwithf a suitable b odymatei-ial or fller,:o"f shellac and a hydrocarbon of the na hthale-ne series-in which said shellac 3. I n .a composition for molded objects,

the combination with'a suitable body material' or filler, of shellac and a crystalline hydrocarbon of the'naphthalene series-.-

4. In a composition for molded objects the combination with' a suitable body-material or filler, o shellac and nitro-naphthol.

In acomposition of molded objects .the

combination with a suitable and :Il nitro-hydro carbon.

(. ln a` composition of molded objects the f illei', of shellac combi nation with a suitable filler, f shellac and a crystalline nitro-hydro carbon of the naphtha'lcne ser1es.

7. In a composition for records for talking. machines, the' combination with a suit able' filler, -of shellac4 and a hydrocarbonlof ing maclines, the combination-.of a suitable non-wax-like filler or body material, and a' hydrocarbon of the naphthalene series.'

9. In a composition for recordsfori tal-ke..

ingr machines, the combination of a suitable fil e 4

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