Fifth. I claim the employment for painting, printing, or otherwise applying colors to articles and fabrics made in whole or in part of gutta-percha, and also to other articles and fabrics of the particular compound or vehicle hereinbefore specified, but without limiting myself to the exact proportions in which each of the materials has been directed to be used in such compound or vehicle, inasmuch as the said proportions may be varied without affecting the general result.
Sixth. I claim the employment, for all manufacturing purposes to which the same are applicable, of the several other improved preparations and compounds of gutta-percha specified under the fourth head of this specification, each in the peculiar combination of materials of which the same consists, and the peculiar process or processes by which it is prepared.
James Cartley, of Harpenden, Hertford, manufacturing chemist, for improvement in the manufacture of varnishes from resinous substances. Patent dated January 11, 1849.
This invention consists,
First. In manufacturing in manner following, from resin spirit, and the gum resin called gutta-percha or gutta taban, a new compound or varnish which possesses the properties of being strongly adhesive and perfectly water repellent. The patentee puts into a pot three parts, by weight, of the gutta-percha or gutta taban, as imported or as it may be bought in the home market, and adds nine parts of crude resin spirit, (obtained by the destructive distillation of common resin) and subject them to a heat of from 120° to 140° Fah., stirring the mixture occasionally. The resulting solution forms a varnish which answers well for the coating of all coarse fabrics, such as tarpaulings, rick cloth, &c. But to obtain a varnish of a purer and better quality, suitable for fine articles, he rectified resin spirit, which he obtains by passing a current of steam through the crude resin spirit until the condensed product which comes over exhibits a specific gravity of about 0.870, at which point the process of distillation must be stopped, all products of a higher specific gravity being injurious to the quality of the spirit.
Claim 1st. The manufacture of the new varnish compounded of gutta-percha and resin spirit, (crude, rectified, or purified,) as before described.
Second. The manufacture of the new varnishes compounded of gum damar and resin spirit, or of gum mastic and resin spirit, whether such spirit is rectified and decolorized or rectified only, as before described.
William Henry Burke, Tottenham, manufacturer. For improvements in the manufacture of air-proof and water-proof fabrics, and in the preparation of caoutchouc and gutta-percha, either alone, or in combination with other materials, the same to be applicable to articles of wearing apparel, bands, straps, and other similar useful purposes. Patent dated April 26, 1849.
First. Mr. Burke proposes to employ a compound of antimony instead of sulphur, for the purpose of rendering caoutchouc, gutta-percha, or their compounds permanently elastic, and unaffected by changes of temperature. The compound is prepared by mixing 1 part of crude antimony with 25 parts of crystallized carbonate of soda, or 20 parts of carbonate of potash, and 250 or 300 parts of water. The mixture is boiled from half an hour to three-quarters, and allowed to precipitate, when the supernatant liquid is run off. The precipitate is then dried and incorporated with the caoutchouc in a masticating machine in the proportion of from five to fifteen per cent. When bands or other articles are to be cut from blocks of caoutchouc, it is taken, while warm, from the masticating machine, and subjected to pressure for one or two days.
Second. It is also proposed to manufacture driving bands, by spreading the material dissolved in a suitable menstrum, with calender rollers, upon pieces of calico or other fabric, powdered with French chalk, to allow of the easy separation of the two, and to increase the rigidity and durability of gutta-percha driving bands, stripes of some fabric are to be affixed to the wearing parts, and both surfaces coated with the antimonized caoutchouc.