THE INDIA RUBBER WORLD 



[December 1, 1915. 



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NEW MANUFACTURING PROCESSES. 



UNITED STATES OF AMERICA. 



1i\-sui-.\TED Wire .\nd Termin.\l. — 1,157,916, Arthur M. 

 worth, Pittstield, Massachusetts, to General Electric Co., 

 Schenectady, New York. 



Method of M.\kixg Rubber Flo.\t-b.\li. V.\lves.— 1.158,009 

 and 1,158,395. David Stephen, assignor to the H. O. Canfield Co. 

 The upper half of the float-ball is stiffened by an internal disc 

 of hard rubber, upon which the outer ply of soft rubber is 

 cemented, carrying the metal insert for attachment. 



Printing Bl.anket.— 1,158,033. Frank E. Ellis. A rubber sur- 

 face blanket with textile plies and an insertion of a ply of sheet 

 cork composition to secure softness and pliability. 



Bead for Pneumatic Tires.— 1,158,194, M. W. Fink and .A.. M. 

 Kobiolke. A molded tire bead of rubber reinforced with internal 

 longitudinal triangular strip of leather and with a leather cover 

 for the body. 



Pneum.\tic Tire.— 1,158,227. H. O. Johnson. The special fea- 

 ture is an endless chain of looped, metallic links, specially formed 

 from steel tape. This chain is placed as a protecting band be- 

 tween the tire casing and the inner tube to prevent puncture cif 

 the latter. 



Art of Manufacturing Footwear.— 1,158.389. W. E. Piper, 

 assignor to Boston Rubber Shoe Co. An apparatus for cold 

 pressing or molding, between flexible diaphragms, uncured rub- 

 ber footwear on lasts, thus compacting the adhesive plies by ex- 

 pelling the contained air preliminary to vulcanization. 



Pressure Applying Apparatus for Footwear. — 1.158,390. 

 Chester J. Randall, assignor to Boston Rubber Shoe Co. The 

 goods on lasts are supported in an adjustable bell-shaped tank 

 containing air under pressure. 



Hose.— 1,158.595. John J. Voorhees, Jr. A hose formed of 

 a strip of spirally wound flat metal, with a superimposed ply of 

 fabric and a cord spirally wound upon the outer surface to form 

 inwardly projecting ribs between the spirals of the metal strip 

 and a tube of rubber applied in close contact with the outer 

 surface of the fabric. The ribs prevent movement of the spirals 

 and contact between the metal and rubber, besides protecting it. 



Vacuum Treatment of Compositions of Rubber.— 1,158,843. 

 Raymond B. Price, assignor to Rubber Regenerating Co. The 

 process begins by incorporating a vulcanizing agent with vulcan- 

 izable plastics previous to their vulcanization. Then subjecting 

 the mass during or subsequent to this addition, simultaneously 

 to a kneading action and to the action of a vacuum, and finally 

 subjecting the surface of the mass to a sealing pressure when en- 

 closed in a yielding covering. 



Hose.— 1.158,995. Richard J. Evans. A hose with tube and 

 cover of rubber and bias-cut plies of asbestos fabric applied 

 spirally. 



Extraction of Rubber.— 1,159,137. Dominique Vecchini. The 

 object is to successively reduce to an extreme degree of fineness 

 shrubs and bark of rubber-bearing plants, in a specially de- 

 signed machine, thus frictionally heating the rubber to an 

 agglomerating temperature, without injury to its fibrous nature. 

 Coated Fabric— 1,159,155. William G. Ayres, assignor to Wil- 

 liam Ayres & Son. A body or core of coarse burlap with a thick 

 fibrous mass on one side and a thin fibrous mass on the other, 

 these fibrous masses being connected to each other through the 

 meshes of the burlap. A preliminary coating of rubber is ap- 

 plied to one face of the material to lay the fibers perfectly 

 smooth, and a finish coating is then applied to the previously 

 coated surface. 



Resilient Wheel.— 1,159.218. Arthur Frederick Hawksley. 

 Molded forms, with or without outer rubber covering, are built 

 up with rubber impregnated cord and shaped to surround and 

 protect resilient air tubes located around the inside circumference 

 of a wheel. 



UNITED KINGDOM. 



.\ New I'ahric Impregnating Process.- The fabric is sub- 

 merged in the rubber solution and passed between rollers, which 

 cause it to vibrate. This opens the threads so that uniform 

 impregnation is obtained. [G. W. Beldam and A. U. B. Ryall, 

 British patent N'o. 17,097—1914.] 



LABORATORY APPARATUS. 



improved micrometer reading device. 



L.^BGR.ATORV workers will appreciate the ease and accuracy 

 with which the graduations of thermometers and burettes 

 can be read by the Lcnzmann micrometer reading device. This 

 unique little instrument was publicly shown for the first time at 

 the recent .\atioii:d i'.siKisition of Chemical Industries in New 

 York City. It was de- 

 vised to meet a genuine 

 need, and was first ap- 

 proved for use in the lab- 

 oratories of the United 

 States Bureau of Stand- 

 ards. The original form 

 has been improved by the 

 addition of a small elec- 

 tric lamp located so as to 

 illuminate the scale and 

 to render it more easily 

 read. The "Lenzmann" 

 differs from other reading 

 devices intended for the 

 same purpose. It consist? 

 of a cnmbinatiun of lenses, 



ed with an adjustalile lens 

 with a very fine hair line 

 through its center and 

 connected to a graduated micrometer screw in such a way that 

 it may be moved across a certain space in either direction. This 

 makes it possible to subdivide the space between any two gradua- 

 tion marks of a thermometer or burette into from two to twenty 

 parts. The illustration shows a side view of the instrument 

 clamped to a thermometer. The subdivision of the scale being ob- 

 served is read from graduations on the face of a cylinder forming 

 part of the milled thumb nut. [Lenz & Naumann, New York.] 



ELECTRICALLY HEATED EXTRACTION APPARATUS. 



A compact apparatus, suitable for general laboratory extractions 



in analytic work is shown in the illustration. It is of rc\ 

 type, mounted on an electrically heated base. It 

 will accommodate any style of glass extractors, 

 and any need for adusting the corks on the tubes, 

 in order to remove any part of the glassware, is 

 obviated. The condensing tube slides easily through 

 the cooling tank, thus enabling any flask or extract- 

 or, or both, to be removed from the cork and not 

 the cork from the glass parts, as in other forms of 

 support. There are no valves or washers used 

 and it is impossible for the cooling tank to leak 

 where the tube passes through. The water en 

 ters at the bottom, through the center column and 

 down to the bottom of the condenser, the warmer 

 water rising and overflowing through the cen- 

 tral column to an outlet in the base opposite the 

 inlet. This arrangement dispenses with the many 

 rubber-jointed individual condensers, and their clamp: 

 fore used. | E. H. Sargent & Co., Chicago, Illinois.] 



ing 



"Rubber Machinery," Mr. Pearson's newest book, filled with 

 valuable information for rubber manufacturers, is now ready for 

 mailing. Price, $6. 



