Mav 1,, 1921 



THE INDIA RUBBER WORLD 



581 



Art of VtLCA.vizixc Caoutchouc which consists in bringing 

 together under reacting conditions sulphur and a nitrogen ac- 

 celerator to produce a sulphur-nitrogen accelerator, and subse- 

 quently incorporating the sulphur-nitrogen accelerator in the 

 caoutchouc mix and vulcanizing it. — Clayton W. Bedford, assign- 

 or to The Goodyear Tire & Rubber Co., both of Akron, Ohio. 

 United States patent No. 1,371,662. 



Art of Vulcanizing Caoutchouc which consists in bring- 

 ing together under reacting conditions sulphur and a nitroso 

 derivative of an aromatic amin to form a sulphur-nitrogen ac- 

 celerator, incorporating the sulphur-nitrogen accelerator in the 

 caoutchouc mix and vulcanizing it. — Clayton W. Bedford, assignor 

 to The Goodyear Tire & Rubber Co., both of Akron, Ohio. 

 United States patent No. 1,371,663. 



Art of Vulcanizing Caoutchouc Substances, which con- 

 sists in bringing together under reacting conditions sulphur and 

 a mctliylene group-containing Schiff base to form a sulphur- 

 nitrogen accelerator, incorporating the sulpliur-nitrogen accel- 

 erator in the caoutchouc mix and vulcanizing the same. — Clayton 

 W. Bedford, assignor to The Goodyear Tire & Rubber Co., both 

 of Akron, Ohio. United States patent No. 1,371,664. 



Process of Compounding Lubricated Sulphur and Rubber 

 and vulcanizing, which consists in first mixing together the 

 rubber and other ingredients of the compound, with the excep- 

 tion of the vulcanizing agent, then adding and mixing sulphur 

 which has been treated with a lubricant, and vulcanizing the 

 resultant mixture. — Daniel Repony, assignor to The Manhattan 

 Rubber Manufacturing Co., both of Passaic, New Jersey. United 

 States patent No. 1,372,041. 



Molded Article and Method of Making It which consists 

 in heating tung oil to a relatively high temperature while avoiding 

 its solidification, molding a mi.xture comprising the treated oil 

 compounded with a suitable filling material, baking the molded 

 article, and applying thereto an external insoluble coating. — Leo 

 H. Baekeland, Yonkers, New York, assignor to General Bakelite 

 Co., New York. N. Y. United States patent No. 1,372,114. 



THE DOMINION OF CANADA 



Leather Preserving Composition comprising a varnish 

 having copal gum 96 parts, colophony 11 parts, linseed oil 200 

 parts, turpentine 320 parts, camphor 4 parts, proxyline 9 parts, 

 acetone 32 parts. Para rubber 3 parts, benzol 16 parts and benzine 

 6 parts. — Joseph Raoul Montpetit and James Scott Adamson, both 

 of Ottawa, Ontario. Canadian patent No. 208,911. 



Puncture Proof Co.mposition for pneumatic tires comprising 

 a combination of flakes of flexible material and a paste of finely 

 ground or precipitated clay, china clay, silica, chalk, French 

 chalk, or alumina, which will not affect or injure the rubber. — 

 William Malem Brothers, Ruddington, Nottinghamshire, Eng- 

 land. Canadian patent No. 209,182. 



Process of Vulcaniz.\tion consisting in intimately mixing- 

 crude rubber with a vulcanizing agent comprising barium thio- 

 sulphate and heating the mixture to produce a vulcanized com- 

 pound combined with inert and stable filling material. — Edgar 

 Levinstein, Boston, Massachusetts, U. S. A. Canadian patent 

 No. 209,239. 



Wrapping Material for Protection of Crude Rubber. A 

 separable protective covering for wrapping crude rubber for ship- 

 ment consisting of a sheet of relatively tough, pliable, air im- 

 pervious, chemically parchmentized vegetable fiber. — The Diamond 

 State Fibre Co., Bridgeport, Pennsylvania. Canadian patent No. 

 209,322. 



Solution for L'se in Manufacture of Boots and Shoes. 

 An adhesive solution consisting of about IS ounces of Venezuelan 

 balata, about 20 ounces of tumaca block balata and about 15 

 ounces of solvent naphtha. — George Emanuel Haldinstein, assignee 

 of Frederick Lu. both of Norwich, Norfolk, England. Canadian 

 patent No. 209,580. 



OTHER CHEMICAL PATENTS 



THE UNITED KINGDOM 



NO. 156,116 Diolefines and their polymerization products prepared by 

 heatins molecular proportions of an ethelene Itydrocarbon 

 and an acetylene hydrccarb< n under pressure. 



156.117 Vinyl halides and esters and their polymerization products pre- 



pared by heating acetylene hydrocarbons with halogen hydrides 

 or with methyl liaiides under pressure. 



156.118 Rubber compositions, synthetic rubber and vulcanizing rubber are 



prepared by condensing an alkyl- or aryl-amine with acrolein. 



156.119 Synthetic rubber diolefine hydrocarbons converted into rubber- 



like substances. 



156.120 Vinyl halides produced by heating calcium carbide with hydrogen 



halides dissolved in water or an organic solvent in the pres- 

 ence of a catalysist. 



156.121 Preparation of vinyl compounds useful for the manufacture of 



varnishes, artificial resins and synthetic rubber substitutes. 



156.122 Diolcfines and their halogen derivatives. Production and utiliza- 



tion for rubber synthesis. 

 156,137 Plastic compositions. A resinous body, prepared by condensation 

 of a ketone and an aldehyde and treatment with an alkali. 



156.143 India rubber substitutes from a fatty acid and fish oil or other 



vulcanizable oil by treatment with sulphur dichloride. 



156.144 Rubber substitutes made from fish oil, oleic acid and sulphur. 



156.149 Coating composition in the form of suspensoid colloidal solution 



of rubber in benzol with or without addition of accelerating 

 agents. 



156.150 Reclaiming waste rubber. Waste rubber free from fibrous matter 



is highly dispersed by treatment in a colloid mill with 

 water, or benzene or petroleum accelerated by addition of 

 soaps or glue, etc. The sulphur is dissolved and removed by 

 filtration. 

 All the above patents (not yet accepted) are in the names of H. Plauson, 



14, Huxter, Hamburg, Germany, and J. A. Vielle, 17 Waterloo Place, Pall 



Mall, Westminster, London. 



156,542 Puncture sealing composition comprising ground mica and cork 

 mixed with water. F. A. McCarty, 31 Queen Street, Mel- 

 bourne, Australia. Not yet accepted. 



LABORATORY APPARATUS 



FLEXIBLE ARM FOR LIGHTING 



I ocalized lighting is frequently desirable in laboratory and 

 ■'— ' testing work as well as for many industrial operations. The 

 illustration shows a flexible arm light- 

 ing unit which can be used with any 

 system of wiring, either open or con- 

 duit. The support for the arm is a 

 30-inch length of ^-inch conduit, firm- 

 ly attached by cleats to wall, ceiling or 

 floor. The joint between this conduit 

 length and the rigid section of tiie 

 arm is a ball-and-socket box which 

 makes a strong self-adjusting joint. 

 The rigid portion of the arm is a 

 half-inch conduit of any length de- 

 sired, to which is clamped a length 

 of flexible conduit terminating in a 

 lamp socket connection. This ar- 

 rangement permits the light to be lo- 

 cated exactly and securely where de- 

 sired. — Sampson Axcess Sj^stem, 

 Inc., 434 Union street, Lynn, Massa- 

 chusetts Adjustable Lighting Unit 



PREVENTING VIBRATION OF BALANCES 



The following means, according to Walter C. Durfee in a recent 

 issue of The Analyst, are effective for protecting fine chemical 

 balances from vibrations. 



The balances are placed on a heavy slab which is supported by 

 three balls of solid rubber resting on a strong table top. The 

 balls are about VA inches in diameter and under the weight be- 

 come flattened sufficiently to prevent any tendency to roll. In 

 the beginning the balls should be fastened in some way, as for 

 example by a short nail from underneath, by saucers or by a pack- 

 ing of cotton between the table and slab. 



"MICRONEX" 



"Micronex" is the copyrighted trade mark name of specially 

 prepared carbon or gas black for use in rubber compounding. 

 The name is symbolical of its extremely minute particle size. It 

 is chemically inert and has physical activity in retarding oxidation. 



