August 1, 1919.1 



THE INDIA RUBBER WORLD 



633 



THE DOMINION OF CANADA. 



Leather Substitute and Process. This consists in forming 

 a matted fiber sheet, saturating and combining with it a 'binding 

 agent composed of rubber, balata, fish glue, silicate of soda, 

 sulphur and linseed oil, drying the sheet and compressing it. 

 (Roland B. Respess, New York City. Canadian patent No. 

 191,418.) 



Rubber Substitute and Process. Glutinized vegetable pro- 

 teid substances are treated with a phenol, an oxidizing oil, an 

 active methylene compound and an alkali, and the mass finally 

 vulcanized. (Sadakichi Satow, Tokio, Japan. Canadian patent 

 No. 191,428.) 



THE UNITED KINGDOM. 



Reclaiming Rubber. Rubber waste is finely ground and mixed 

 with a rubber solution in the proportion of 2y> to 3 pounds of 

 new rubber to each hundred of old, the solvent being gasoline or 

 carbon tetrachloride. The mass is reground, after which the 

 solvent and any contained moisture are removed as far as pos- 

 sible, the teiTiperature being kept below the vulcanizing point, em- 

 ploying a partial vacuum if necessary. Molding and vulcanization 

 are effected with or without the addition of sulphur which, when 

 employed, is preferably dissolved in the rubber solvent. (J. 

 Porzel, 199 Glenwood avenue, Buffalo, New York. British patent 

 No. 124,887.) 



Composition for Coating Fabrics. This consists of rubber and 

 aluminum hydrates, with or without other ingredients, forming 

 a non-inflammable coating. Example of proportions : 25 parts 

 rubber, 60 parts aluminum hydrate, 7 parts asbestos, IVb to 6 

 parts litharge and 1 part sulphur. This mixture is softened in 

 coal-tar naphtha and used to coat fabric which may be first 

 treated to render it fireproof, and the coating may be vulcanized 

 in a steam vulcanizer. (W. H. Perkin, Waynfiete ; J. H. Mandle- 

 berg and J. Mandleberg & Co., Pendleton, Manchester. British 

 patent No. 125,622.) 



Vulcanizing Accelerator. Caustic alkali is dissolved in an 

 organic compound (other than glycerol or glycol) of predom- 

 inant hydroxylic character, such as butyl or amyl alcohol or 

 phenol. The compounds in question are limited to those that 

 are fluid at the ordinary temperatures or are fusible at about 

 120 degrees C. (Dunlop Rubber Co., 14 Regent street, West- 

 minster, and D. F. Twiss, Royal road, Sutton, Coldfield. British 

 patent No. 125,696.) 



THE REPUBLIC OF FRANCE. 



Accelerators. New agents for accelerating the vulcanization 

 of caoutchouc and method of their production. (S. J. Peachey, 

 Heaton, Mersey, near Manchester, England. French patent No. 

 490,897.) 



HOLLAND. 



Accelerating Vulcanization of Rubber. Para-nitrosodi- 

 methylaniline is added as the accelerating agent. (S. J. Peachey, 

 Heaton, Mersey, near Manchester, England. Holland patent No. 

 2,829, March 15, 1919.) 



N^ 



ith the 



of ballo 



OTHER CHEMICAL PATENTS. 

 THE UNITED KINGDOM. 



APPENDIX TO ABRIDGMENTS OF SPECIFICATIONS (1915) 

 true 'n,„ iicnrppration of coloring matter in solutio 



• ■■ n fabrics to guard against deleterious action 



of light. (Not yet accepted.) R. Wheatley 



and North British Rubber Co., Castle Mills, I-ountain- 



bridge, Edinburgh. 



he colorins of one or more of the intermediate plies as well 



the outer one of the gas-tight membrane of a balloon 



fabric to EU.nrd against the deleterious action of light. (Not 



vet accepted) W. A. Williams and North British Rubber 



Co., Castle Mills, Fountainbridge, Edinburgh. 



compound fabric for balloons of the type described in 



Specification 7130/03. consisting of two or more Pbes of 



• larly dyed material of identical weave and yarns. (Not 



accepted ) W. A. Williams and North British Rubber 



Castle Mills. Fountainbridse. 



hi 



{dinbvirph. 



LABORATORY APPARATUS. 



INSURING TIGHT CONNECTIONS BETWEEN GLASS AND 



RUBBER TUBING. 



A SIMPLE AND EFFECTIVE DEVICE for insuring tight connections 

 between glass and rubber tubing is described by C. C. Kep- 

 linger in "The journal of Industrial and Engineering Chemistry," 

 August, 1918, page 631. 



The device illustrated permits the 

 use of oversize rubber tubing, and in- 

 sures gas- and water-tight joints. It 

 has been used throughout the year with 

 Liebig condensers and gas apparatus 

 and given complete satisfaction. A is 

 a piece of stout wire bent in U form 

 of such size that the limbs of the U 

 will just slip over both tubes. A loop 

 of stout cord is tied about the connec- 

 tion, the wire U is slipped through this 

 jop as shown by dotted lines, the cord 

 is twisted, using the wire as a lever, and 

 as soon as the joint is tight, the U is 



Connection betwee> 



Glass and Rubber 



Tubing. 



turned as shown at A. 



Cord is better than copper wire 

 for this purpose because it dis- 

 tributes the force more uniformly 

 throughout its length. This mode 

 of attachment may be dismantled 

 without pliers or other tools. 



CLEANSING FILTER CRUCIBLES. 



An effective method of cleans- 

 ing alundum filtering crucibles by 

 reverse washing is clearly shown 

 in the accompanying illustration Filter Crucible Cleansing. 

 for which we are indebted to the Norton Company, Worcester, 



Massachusetts. 



FILTERING CRUCIBLE. 

 Alundum filtering devices are especially adapted to routine lab- 

 oratory work where suction is available because of the rapidity 

 with which filtration can be made. They will hold the finest 

 precipitated substance and are particularly 

 adapted to organic work where they need 

 only to be heated over a burner to be 

 cleansed. In addition to the usual forms of 

 crucibles, cones, and dishes, alundum filters 

 are made in special shapes, such as disks, 

 plates, tubes, etc. 



A novel and effective way of supporting 

 a filtering crucible so that the entire filter- 

 ing area is acted upon by the suction is 

 shown in the illustration. The apparatus 

 was designed and used first by G. L. Spencer 

 of the Cuban- American Sugar Co. (Norton 

 Co., Worcester, Massachusetts.) 



Filtering compound FOR FROSTING AND ETCHING 



Device. glass. 



Diffusalene is the name given to a new liquid compound which 

 imparts a smooth satin-like frosted finish to glass surfaces. The 

 glass becomes uniformly and permanently etched wherever the 

 liquid is applied, complete chemical action taking place in about 

 three minutes. It is applied by dipping or by brush and is 

 practically harmless to hands or clothing. (Standard Scientific 

 Co., 70 Fifth avenue. New York City.) 



"Crude Rubber and Compounding Ingredients" and "Rub- 

 ber Machinery," by Henry C. Pearson, should be in the library 

 of every progressive rubber man. 



