US654951A - Process of manufacturing composition applicable for electric insulation. - Google Patents

Description

106. COMPOSITIONS,

COATING OR PLASTIC.

Cross WILLIAM JAMES CORDNER,OF LONDON, ENGLAND, ASSIGNOR TO LOUIS D.

.BRANDEIS, TRUSTEE, OF BOSTON, MASSACHUSETTS.

PROCESS OF MANUFACTURING COMPOSITION APPLICABLE FOR ELECTRIC INSULATION.

srncmca'non forming s of Letters Patent No. 654,951, dated July Application filed mm 17,1899. Serial Kc. 735,908. or omma To all whom it may concern.- Be it known that 1, WILLIAM JAMES Gonn- NER, a subject of the Queen of Great Britain and Ireland, residing at London, have invented a new and useful Improvement in Processes of Manufacturing England,

9. Composition Applicable for Electric Insulation and other Purposes, (for which I have made application for Letters Patent in Great Britain under No.

following is aspecification.

13,846 and date of July 4, 1890,) of which the This invention relatesto the manufacture of a composition'from rhea fi her applicable for electric insulation and other purposes,

such as the manufacture of like, and has of a material insulator in comparison to its thickness, which is practically a non-absorbent which can be'produced at a 10 -To carry my invention into effect, the rhea,

rities b; w" as? fiber is first cleansed'from impu of water, and

w cost.

"'l'mnd r 1 e 1 any of the we ways, suEFfl'Ty treatment with carbonate fsoda and if the a I.

"in High-class insulation it may be necessary to degum the process, ment under degumming or the material before commencing hereinafter described, by treatthe Gomespatented process of by other equivalent means.

After the'above-described preliminary treatment the rhea fiber of silicate of soda of a density of mm e exact density being dependamount of gum in the fiberthe greatest density of 20 I Baum is only used when the fiber has been 7 aume, out upon the for example,

is immersed in a solution thoroughly degummed. When the fiber is oarefull dried in a suitable oven or drying-room at Temperaso thoroughly saturated, it is tures commencing at 80 and rising to 250 Fahrenheit untilrall the moisture has en he fiber is next immersed in at until it has taken up all the 01 it can possid from the oilbath and placed into a machine, such as a a temperature of 300 Fahrenheit and the superfluous oil is extracted.- The fiber is then suspended in a drying-room and thoroughly dried in a temperature of 250 Fahrenheimfl'l' of sma and heavy hydrocarbon on the fiber it has assumed the character of pure hydrocarbon cellulese. It is then carefully examined and the parts that have not assumed the desired character-41. 2., a complete transformation into cellulose-are removed and retreated to the hydrocarbon bath and extraction processes and again put into the drying-room. in the manner described, it-is thoroughly treated mechanicallyin a dry mixer until the original fibrous formation ofthe'material has entirely disappeared. It is now ready for incorporation with oils similar materials-such as I oil rubber-oil balataindia-ru er an n a-erca-accor mg 0 s class of mater a I es re. For example, if hard material is required an excess of resinous gums is mixed with the cellulose, or if soft and flexible material is required a larger amount of readily-oxidizable oil is incorporated, the oil being first treatedand thickened with oxygen gas, given off by black oxid of manganese when heated. This method imparts no disagreeable smell'to the resultant product. For cable insulation, where a very high reto add a small portion of gutta-percha; but this is not necessary for purposes of ordinary insulation. In asimilar sense the heavyhydrocarbon cellulose maybe employed to load india-rubber.

Having now describedmy invention, what out, is--- in a solution of silicate of soda of a density of 15 .to 20 Baum,th edrying of same to e I t 5 bath of resiuor other heav h drocarbon oil A process for the manufacture of a compoat a tem'p'e ra'ture of a'Fou't EEEQnE sition consisting of treatment of rhea fiber,

sins ums and ll'lSBGl'iOll resinum 20H iana gum,

which is advantageously 80 I claim, and desire to secure by Letters Pat-- EXAMINER hydroextractor or press, which is worked in 50 'Having formed the cellulose sistanco is required, it is sometimes advisable 5 extract the moisture, the saturation of the the like to form a composite material, subflber, with a heavy hydrocarbon such as resinstantially as described. 1o oil and the like, the removal of superfluous In witness whereof I have hereunto set my heavy hydrocarbon, the treatment by heat of hand in presence of two witnesses. -5 the saturated fiber to transform it into a WILLLQM J AMES- CORDN ER. heavy hydrocarbon cellulose, the disintegra-. -WTituesses:

tion of the said cellulose and the mixture H. E. DENNY, therewith of gums,'resins, oxidizable oils and CHARLES CARTER.