'I'M 



THE INDIA RUBBER WORLD 



true metals and a vulcanizing constituent. (Bela W. Rote, 

 assigner to L. J. Weadock, both of Elyria, Ohio. United States 

 patent No. 1,318.804.) 



Method of M.xnik.acturing Tire Tubes of layers of Japanese 

 paper pasted together, coated with alcohol solution of resin and 

 shellac and finished with a thick solution of india rubber on 

 both the inner and outer surfaces. (Etsutario Ikeda, Tokio, 

 Japan. United States patent No. 1,319,003.) 



Pl.\stic Mass Resembling Soft Rubber or Le.xther and 

 Process, consisting in treating yeast with formaldehyde and 

 subjecting the product resulting to the combined action of heat 

 and pressure. (Ernst Krause, Steglitz, and Haus Bliicher, 

 Leipzig-Gohlis, Germany, assigners by mesne assignments, to the 

 Cliemical Foundation. Inc., New York City. / United States 

 patent No. 1,319,666.) (See German patent No. 314,728 granted 

 to Hans Bliicher, Leipzig.) 



Le.-vther Substitute and Process of Manufacture. Sheets 

 of fibres are saturated with a solution of a binding agent, dried 

 and compressed, coated with rubber containing a vulcanizing 

 agent and cured under heat and pressure. (Roland B. Respess, 

 New York. United States patent No. 1,319,795.) 



Composite Sheet Material consisting of a fibrous sheet im- 

 pregnated with an oxidizing oil, textile fabric superimposed on 

 one surface thereof, and a layer of elastic adhesive material 

 uniting the fibrous sheet and fabric. (Alexis W. Keen and 

 Pietro Frigeri, New York City, assigners to Rubber Regenerat- 

 ing Co., Naugatuck, Connecticut. United States patent No. 

 1.320.149.) 



Process for Vulcanizing Rubber and Products Obtained 

 thereby. A process for treating rubber or similar material which 

 comprises subjecting the rubber to an organic dye adapted to 

 produce oxygen and inducing vulcanization to take place under 

 the action of said oxygen. (Iwan Ostromislensky, Petrograd, 

 Russia, assignor, by mesne assignments, to New York Belting 

 & Packing Co.. New York City. United States patent No. 

 1.320.166.1 



THE DOMINION OF CANADA. 



Rubber Vulcanizing Process which comprises mixing dinitro- 

 benzene and red lead with rubber or similar materials and vul- 

 canizing the mixture. The patent also includes the vulcanized 

 products of the action of red lead and dinitrobenzene. (The 

 Canadian Consolidated Rubber Co., Limited, Montreal, Que., 

 Canada, assignee of Sheldon P. Thacher, Wcehawken, New 

 Jersey. U. S. A. Canadian patent No. 193,394.) 



THE UNITED KINGDOM. 



Coating Materials for Fabrics, etc. Turkish birdlime is 

 thinned with alcohol and used for rendering porous materials 

 impervious, especially for making petrol tanks from porous 

 materials such as canvas or from a material such as rubber, 

 which is attacked by petrol. The birdlime is preferably treated 

 with hot solution of borax or with hot water, then heated to 

 180 degrees F. and mixed gradually with the alcohol. To vary 

 the consistency, diatomaceous earth shellac, or dextrine may be 

 added. (C. A. Brackenside, Woburn Sands, Bedfordshire, and 

 Gayner Pneumatic Co., 95 Cannon Street, London, British patent 

 No. 130,379.) 



N' 



OTHER CHEMICAL PATENTS. 



GERMANY. 



PATENTS ISStTED, WITH DATE OF APPLICATION. 

 .319,032. ProducitiM rubber .soles for boots 



Kurt Blit: 



:ircli< 



314,503. (September 21, 1917.) Process for reclaiming rubber shavings. 



Adolf Vorweck. Jr., Bremen. 

 314,S60. (February 23, 1915.) Process for producing rubber-like hard 



and soft rubber. H. Otto Traun's Research Laboratory, 



Hamburg. 



314.r-'8 

 315.321. 



493.450. 

 493,569. 

 493,634. 



soft rubber 



Hans Bliicher, Leipzig. 

 (January 23. 1918.) Process for making highly elastic vulcan- 

 ized substances out of^ synthetic rubber. Mitteldeutsche 



German fabrik. Lou 



Pete 



Frankfort. 



THE FRENCH REPUBLIC, 



Process for making synthetic rubber. IL Jousse. 



Process for making ebonite. R. C. M. Bayard de la Vingtrie. 



Improvements in vulcanizing rubber and like substances. The 



Dunlop Rubber Co., Limited. 

 Process for removing the combined sulphur from vulcanized 



rubber. D. Spence. 

 Process for vulcanizing rubber objects. American Rubber Co, 



LABORATORY APPARATUS. 



AN EFFICIENT CONDENSER. 



The Kobe Condenser has three sets of walls. The water for 

 cooling enters through the upper side tube, thence it passes 

 through the coiled inner tube and out by the lower side tube. 

 The distillate enters the adapter at the top, 

 passes through the expanded middle tube and 

 out by the tube at the bottom. 



While in the apparatus the distiller is cooled 

 in three ways ; first, by the expansion of the 

 middle tube; second, by the jacket of cold 

 water around it; and third, by the cold tube 

 coiled inside it. 



A Kobe condenser of this type, with body 

 six inches long, is as efficient as a regular 

 Liebig condenser 35 to 40 inches long. It is 

 especially recommended for liquids of low 

 boiling points. (Eimer and Amend, Third 

 avenue, 18th to 19th streets, New York City.) 



PRESSURE-EQUALIZING STOP-COCK. 



The special pressure-equalizing stop cock 

 shown in the illustration was designed for 

 use in connection with a generator for car- 

 bon dioxide which was to be used alternately 

 with pressures belo 

 and above that of the 

 atmosphere. In this 

 new apparatus the con- 

 nection is made by means of an annular 

 groove in the key of the stop-cock so that 

 there is always com- 

 munication between the 

 lower flask and that of 

 the upper one. 



One arm of the stop- 

 cock is extended until it 

 opens above the liquid in 

 f7 the upper container. The 



liquid enters at an aper- 

 ture in the lower part of 

 this opening. Two dif- 

 ferent styles were made 

 using the same principle 

 in each. ("The Journal 



of Industrial and Engi-^™'-"^ ^°« Equai. 

 neering CThemistry.") 



iziXG Press L 



to 5 cc. 

 (Eimer 



IMHOFF SEDIMENTATION TUBE. 



The Imhoflf sedimentation tube for determin- 

 ing sediment in water and other liquids is 

 shown in the accompanying illustration. It has 

 a capacity of one liter graduated or divided as 

 follows: up to 2 cc. in one-tenth cc.'s; from 2 

 1 one-half cc.'s and from 5 cc. to 4 cc. in single cc.'s. 

 Amend, Third avenue, 18 to 19th streets, New York.) 



