THE INDIA RUBBER WORLD 



291 



CHEMICAL PATENTS. 



THE UNITED STATES. 



OROuuriNC KiBBtR .SvNTiiF.TUALLv. The process of changing 

 •*• limoneiie into a rubber-like substance, which consists in 

 bringing the Hmonene into contact with metalUc sodium. 

 (Louis Gottschalk. Rah way, New Jersey; Esther Gottschalk, 

 administratrix of Louis Gottschalk, deceased. United States 

 patent N'o. 1,323,599.) 



Se.^linc Composition for Can'^. consisting of crude rubber, 

 benzol, beeswax, parafhne wax, a d talcum powder in propor- 

 tions set forth, (.\ustin Gilbert and Charles E. Vander Hoof, 

 assigners to the Fischer Can Co.— both of Hamilton, Ohio. 

 United States patent No. 1,323,752.) 



Vulcanization Process a.nd Product. .-\ product made by 

 incorporating a product of hydrolytic decomposition of a pro- 

 teid and heating the resultant mixture with a vulcanizing agent 

 to effect vulcanization. (Clayton W. Bedford, assignor to The 

 Goodyear Tire & Rubber Co. — both of Akron, Ohio. United 

 States patent No. 1,323,951.) 



Process of Reclaiming Rubdf-R, comprising treating simul- 

 taneously the vulcanized material in proper condition and 

 under heat and pressure with a devulcanizing agent comprising 

 xylol and aniline in the presence of a substance capable of 

 combining with or absorbing sulphur. (John Young, .A.kron, and 

 Winthrop W. Benner. Cuyahoga Falls, Ohio, assignors to the 

 Firestone Tire & Rubber Co., .\kron, Ohio. United States 

 patent No. 1,324,093.) 



Coated Fabric, comprising a sheet of fabric having a base 

 coating containing rubber and a surface coating containing 

 nitrocellulose. (Clarence Weare Hewlett, Kokomo, Indiana, as- 

 signor to E. L du Pont de Nemours & Co., Wilmington, Dela- 

 ware. United States patent No. 1,324,154.) 



Leakproof Composition for Tires, a composition for filling the 

 walls of tire tubes. A mixture of about 16 parts of mineral wool 

 to one of a mixture of gelatine and soap in proportion of about 

 two of gelatine to one of soap and two ounces of the mixture 

 mixed with a quart of water. (.Arthur W. Swanberg, Minne- 

 apolis, Minn., assignor to Waldo B. Berryman. Lima, Ohio, 

 United States patent No. 1,326,007). 



Rubber and Method of Obtaining It by incorporating there- 

 with sulphur, titanic oxide, zinc oxide, a black carbon pigment, 

 and an accelerator of vulcanization other than titanic oxide, 

 and vulcanizing the mi.xture. (Louis E. Barton, Niagara Falls, 

 New York, and Henry A. Gardner, Washington, D, C, assignors 

 to The Titanium Alloy Manufacturing Co., New York City. 

 United States patent No. 1,326,319.) 



Vulcanized Leather Substitute. Formed of a composition 

 of matter composed of an excess by weight of rubber, and an ex- 

 cess by bulk of cork particles in combination with a fibrous ma- 

 terial, reclaimed rubber, sulphur and glue. (Justus W, Matthael. 

 Ingram, assignor to Armstrong Cork Company, Pittsburgh — both 

 in Pennsylvania. United States patent No. 1,326,681). 



THE UNITED KINGDOM. 



Receneratf;d Vulcanized Rubber is secured by first pulveriz- 

 ing the material, then heating it in a vacuum or in the presence 

 of an inert gas with continuous agitation, such as carbon diox- 

 ide or nitrogen, the temperature being such that fusion of the 

 mass does not occur, and then when the heated mass is suffi- 

 ciently plastic, suddenly cooling it by spreading on a cold stone 

 or by projecting it into cold w^ater or into a solution of sodium 

 carbonate, caustic soda lye, or other liquid. (B. J. F. Varen- 

 horst. 25 Jacol) (iillesstraat, Haag, Holland, British patent No. 

 1.33,369). 



THE DOMINION OF CANADA. 



Rubber Compound of improved toughness, consisting of mix- 

 ing on heated rolls rubber, vulcanizing material, thin roughened 

 flakes of tough, durable, flexible, resilient material (such as fish 

 scales) and then vulcanizing the mixture. (Niels D. Nielsen, 

 F.lyria, (Dhio. Canadian patent No. 194,716.) 



Rubber Fabrics. .\ compound integral rubber fabric com- 

 prising a stratum of moldable elastic rubber and a stratum of 

 highly tiberized moldable rubber compound vulcanized together. 

 (Gutta Percha & Rubber, Limited, assignee of John McI. Ogil- 

 vie, Toronto, Ontario, Canada. Canadian patent No. 195,326.) 



OTHER CHEMICAL PATENTS. 



GERMANY. 



PATENTS ISSUED, WITH DATES OF APPLICATION. 



"K." (June 10, 1917.) Process (or the formation of 



resembling hard rubber. Transferred by Dr. Fritz Stein 

 Furstenfeldbruck bei Munchen. to the Bakelite Co ~ 

 (November 13, 1918.) Process for producing a substil 



gutta percha which is not sensitive to alcohol. Fabrik 

 Oskar Skaller, Berlin. 

 (August 27, 1915.) Process for forming plastic substances from 

 casein. Deutsche Kunsthorn Geschellschaft m. b. H., 



ubstanccs 



Berlii 



THE FRENCH REPUBLIC. 



patents ISSUED, WITH DATES OF APPLICATION, 



(January }(>. 1919.) Process for accelerating ths vu] 



LABORATORY APPARATUS. 

 SAFETY VALVE FOR DISTILLING FLASK. 



A VERV USEFUL SAFETY VALVE of interest to chemists is b-houn 

 ^*- here as described by E. Rittenhouse in "The Journal of 

 Industrial and Engineering Chemistry," August, 1918. page 633. 

 The valve is intended for use in a distilling flask when de- 

 termining ammonia by absorption in standard 

 acid solution. It will prevent the acid from 

 going up into the flask by letting air in and 

 breaking the vacuum. The valve is made en- 

 tirely of glass, with a drop of mercury in the 

 bulb. It is very effective, never sticking, al- 

 ways set. The principle, namely, the pressure 

 due to a column of mercury, can be adapted 

 to all low-pressure work, both above and be- 

 low that of the atmosphere. 



" Ouf/s, 



Merctjry 



Safety Valve. 



THREAD COUNTING MICROMETER. 



In rubber works control laboratories handling textiles, the need 

 has long been felt for a better instrument than the ordinary 

 pocket linen counter in common use. This need has been well 

 met by the Lowinson thread counting micrometer shown in the 



The instrument includes a triangular 

 scale, which can be instantly adjustec 

 to provide an inch measure (four quar- 

 ters), a linen measure, a millimeter 

 measure, and the dec- 

 imal parts of an inch. 

 Being made of pol- 

 ished steel, each scale 

 reflects the light upon 

 the fabric beneath the 

 lens. Greater stability 

 is afforded by placing 

 the knob, which, upon 

 being moved by the Thread Counter. 



finger, moves the index within, instead of outside, the frame of 

 the instrument. By a disengaging device the index can now be 

 quickly moved to any place on the scale. To facilitate the count- 

 ing of even the finest fabrics a lens of unusually high power is 

 provided. (Charles Lowinson, Inc., 366 Fifth avenue. New York.) 



