March 1. 1920] 



THE INDIA RUBBER WORLD 



361 



CHEMICAL PATENTS. 



THE UNITED STATES. 



^f/.\TERPRfOFiNG COMPOSITION. One Kallon ncat's-foot oil, eight 

 *' pounds rubber, one pound tallow, eight ounces beeswax, 

 four ounces resin and one ounce Burgundy pitch. (Daniel 

 Jewett Davies, Pasadena, California. United States patent No. 

 1,329,162.) 



THE DOMINION OF CANADA. 



Rubber Recl.mming Process comprising simultaneously treat- 

 ing the material to be devulcanized under proper conditions of 

 heat and pressure with a devulcanizing agent comprising xylol 

 and aniline in the proportions of 2VL' per cent of aniline and 

 ten per cent of xylol in the presence of a substance capable of 

 combining with or absorbing sulphur. (Firestone Tire & 

 Rubber Co., assignee of John Young, both of Akron, and 

 Winthrop W. Benner, Cuyahoga Falls — all in Ohio, U. S. A. 

 Canadian patent No. 195,875.) 



Decorated Rubber .\rticle. The method of making a decora- 

 tive rubber article by compounding a mass of unvulcanized rub- 

 ber with a light-sensitive material, forming the compound into 

 the article desired, and subjecting the surface of the article to 

 light rays conforming with the desired design, and then subject- 

 ing the article to the action of heat. (The Canadian Consolidated 

 Rubber Co., Limited, Montreal, Quebec, Canada, assignee of Al- 

 bert A. Somerville, New York City. Canadian patent Xo. 195,- 

 143.) 



Pavement Composition in the form of a block or tile com- 

 posed of peat, bitumen, marine glue, and slaked lime, trans- 

 formed by heat to a thick paste and subsequently compressed 

 in a press. (Eugene Audit, Montreal, Quebec, Canada. Cana- 

 dian patent No. 196,210.) 



Rubber Reclaiming Process for the separation of cotton fiber 

 or the like from rubber waste which comprises the steps of 

 wetting the waste, passing the waste under a roller and feeding 

 it gradually to a high speed picker whereby the fabric is torn 

 from the waste in the form of threads and fibers and the rubber 

 is torn into small particles, throwing the cotton and rubber to- 

 gether from the picker and separating the cotton from the rub- 

 ber by blowing the cotton out of its normal course. (The 

 Acushnet Process Co., Inc., New York City, assignee of Philip 

 E. Young, Fair Haven, Massachusetts, U. S. A. Canadian patent 

 No. 196,380.) 



Rubber Vulcanization. A process for neutralizing the sul- 

 phurous and sulphuric acids and their anhydrous and gaseous 

 forms, generated by the oxidation of the rubber in vulcanized 

 rubber goods having a foundation of fabric, immediately after 

 dry vulcanization is finished and before the goods have cooled, 

 which consists in subjecting the goods to a suitable heat and 

 treating them in an hermetically sealed chamber with undiluted 

 ammonia gas under pressure. 



Another claim covers associating with the components of the 

 goods, ingredients which are capable of emitting a gaseous re- 

 agent which has a strong neutralizing activity but no prejudicial 

 effect on fabric, rubber, or process of vulcanization. (Wil- 

 liam Edgar Muntz, London, England. Canadian patent No. 

 196,564.) 



THE FRENCH REPUBLIC. 



Acceleration of Vulcanization. A process for accelerating 

 the vulcanization of rubber. J. F. B. Van Ilasselt. (French 

 patent No. 495,284.) 



Vulcanizing Rubber. A process for vulcanizing rubber and 

 similar substances, and the product resulting from it. The 

 North British Rubber Co., Limited. (French patent No. 496,220.) 



Vulcanizing Rubber. Improved method of vulcanizing rub- 

 ber and similar substances. (The Dunlop Rubber Co., Limited, 

 Birmingham, England. French patent No. 497,327.) 



LABORATORY APPARATUS. 

 ELECTRICALLY HEATEO COMBUSTION TUBES. 



COMBUSTION tube that is heated electrically has been de- 

 ^ signed by C. B. Clark, as shown in the accompany illustra- 

 tion. The tube 

 is of porcelain 

 24 inches long 

 and 0.4-inch in- 

 ternal diameter. 

 The heating 

 element con- 

 sists of a coil 

 nt and provided 



:zz^ 



Electrical Combustion Tui 



I platmum wire, insulated by fire clay and ce 

 ith copper terminals. 



*^ 



Yarn and Cloth Quadrant 



INSTRUMENT FOR DETERMINING YARN NUMBER AND WEIGHT 

 OF COTTON CLOTH. 



The accompanying illustration shows a device known as a 

 yarn and cloth quadrant, designed for accurately and conveni- 

 ently determining t h e 

 number of cotton yarn 

 and the weight of cotton 

 cloth. 



Numbers of yarns 

 from one to ten are de- 

 termined by placing on 

 hook B of the quadrant 

 40 lengths of either 

 warp or filling yarn, 

 drawn from a sample 

 cut to the size of a tem- 

 plate accompanying the 

 instrument; the pointer 

 will immediately indi- 

 cate the number of the 

 yarn, on the lower "4-yard scale." For numbers from ten to 

 1(X), hook A is used. 



The weight of cloth in yards to the pound and the percentage 

 of size in cloth can also be readily ascertained by this instru- 

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



PIPETTE USED IN TITRATION OF OILS FOR ACIDITY. 



The pipette illustrated is described by J. Jacobsen, Aarhus 

 Oliefabrik, -Xarhus, Denmark, in "The Journal of Industrial 

 and Engineering Chemistry," August, 1918. 



The oil to be examined is drawn, by means 

 of the rubber bulb a, into the lower tube, 

 which has a capacity of 5.5 cc, equivalent to 

 5 grams of oil. The cock is turned and the 

 upper tube is filled with a suitable quantity 

 (10 cc.) of a mixture of ether and methylated 

 spirit, conveniently taken from a tubulated bot- 

 tle, b, which is located just above the pipette. 

 Then the cock is turned again and the oil, fol- 

 lowed by the ether-alcohol mixture, is run into 

 a flask and titrated with alkali. In that way 

 the lower tube is cleaned out automatically 

 and is at once ready for a new sample. 



a. 



A?® 



Titration 



DIXIE CLAY. Pipette. 



\ new compounding ingredient notable for its 

 wear-resisting quality is being offered to manufacturers of tires, 

 footwear, hard rubber, and mechanical rubber goods. It is light 

 in color, mills easily and calenders well in high tensile com- 

 pounds. (R. T. Vanderbilt Co., Inc., 50 East 42nd street, New 

 York City.) 



