88 



THE INDIA RUBBER WORLD 



[December i, 1906. 



MECHANICAL TIME RECORDER. 



SOME WANTS OF THE TRADE. 



AN iiistruiiicnt to make a graphic and accurate record of 

 mechanical movements in mill and factory has been 

 something tliat has long been a need of more or less import. 

 This requirement has been met by the Bristol Co., of Water- 

 bury, Connecticut, in their Mechanical Time Recorder, 

 which they have been marketing recenth-. In construction 

 it is a circular chart, 8 inches in diameter, revolving by 



^ ., clock work at uni- 



form speed, move- 

 ments being s u p - 

 plied for complete 

 revolution once in 15 

 minutes ; 1,2, 3. 4, 

 6, 8, 10, 12, and 24 

 hours, and 7 days. 

 In this w ay t h e 

 si^eed may be se- 

 lected to give best 

 results under all 

 commercial require- 

 ments. A pen arm 

 is rigidly attached 

 at its lower end to a 

 shaltvvhich is turned 

 by a short arm pro- 

 jecting througli a 

 slot in the bottom of 

 the case. The lever 

 which is shown in 

 the illustration is 

 clamped to the short 

 "^ '^ arm by a thumb nut, 



is adjustable, and can be clamped to the arm at any conven- 

 ient angle. The parts are so regulated that the instrument 

 is conveniently adapted to record motions of all amounts 

 and directions. It can be used to record the rate of motion 

 and position of sluice gates, turbine or engine governors, 

 gate valves, etc. It is also adapted for recordingthe rise and 

 fall of liquids in tanks, rivers, reservoirs, and fore baj-. The 

 distinct advantages in its use are at once recognized as varied 

 and desirable. A use in rubber factories, very few of whicli 

 are operated by water power, is in making a continuous 

 record of the time when the rolls of mixing mills, for e.\- 

 ample, are in operation and a positive record of the time 

 they maj' run empty. 



METHOD OF MAKING FIRE HOSE. 



A NEW invention of a method of making tire hose consists 

 ■^-^ in partially curing a rubber tube, inserting this within 

 a tube of cotton or other fabric, further curing the rubber 

 tube and distending the same to adhere to the tube of fabric. 

 A cooling medium is now passed through the rubber tube, 

 after whicli a cold hollow mandrel is inserted. An outer 

 coating of rubber is ajiplied to the tube of fabric, said rubber 

 being protected by a temporary covering of fabric to prevent 

 overcuring, after which the inner and outer rubber surfaces 

 are fully cured. The patentee is William H. Adams, for- 

 merly connected with the fire hose trade in the I'uited States 

 and now of Montreal, Canada. 



[3oo] \ READER wishes to communicate with "some 

 ^-^ individuals who make a specialty of making 

 brass moulds for rubber horse shoe pads." [Nobody makes 

 brass molds for rubber horse shoe pads. Brass cannot be 

 used for molding rubber for the reason that the sulphur in 

 the rubber would unite with the copper during vulcanization, 

 and the molded article would stay in the mold unless cut 

 out with a chisel. The Editou. | 



[3.>(>J A prominent rubber gatherer desires to gain infor- 

 mation respecting the cure of rubber in Ceylon. [Clippings 

 were sent from The India Ruhher WoRi.n, showing a cen- 

 trifugal machine made in London and also a coagulating 

 machine made in the Federated Malay States. For your pur- 

 pose it looks as if the London machine would be the better. 

 I don't know whether you have a prejudice against adding 

 water to the rubber milk, but my own experience leads me 

 to believe that it does no harm at all. This Christy machine 

 is now in use in Mexico, and is coagulating the milk of the 

 Caslillna tree very nicelj-. The machine can be worked by 

 hand, but the better way, of course, is to have a small gaso- 

 line engine to work it. I would suggest that you get one of 

 these machines and put up a dry house and do the whole 

 thing on a small scale until you discover exactly what the 

 commercial scale should be. With regard to the use of acetic 

 acid coagulation, that is done by adding a few drops to a 

 pint of milk and letting it set in a shallow vessel over night. 

 I don't advise that, if you can make the mechanical coagu- 

 lation by the centrifugal machine do the work it appears to 

 me much better. — The Editor.] 



[:i57] A reader of The Ixdi.'^ Rubber World would like 

 to communicate with makers of Nigum. 



[35S] .-V large Southern mechanical rubber goods concern 

 asks for addresses of the manufacturers of canvas belting. 



[359] An Arkansas tent and awning companj- wish a list 

 of makers of rubber toys, dolls, and balls. 



[.■{GO] The following communication has been received 

 from a foreign correspondent : " Permit us to inquire whether 

 3'ou are in a position to put us next to a machine factory 

 which could make us machines for the manufacture of round 

 woven cotton tubing (hose)." 



[3(>l] A German reader has heard of a vertical spreading 

 machine bought in America and wishes information concern- 

 ing it, also the name of any company that may manufacture 

 such machines in this country. 



[3tt"i] One or two of the ordinary processes for dissolving 

 asbestos to a liquid or plastic state are asked for through 

 the columns of The India Rubber World. The inquirer 

 for these processes says : " I have a process for dissolving it 

 to a plastic state but it does not leave it pure. It contains 

 some of its group or famil\ . What use might be made of 

 the product ? " 



|3C;J] Small rubber tubing in large quantities is desired 

 by a correspondent. The size required would be about % 

 inch in diameter and would not have to be of the best. It 

 would be preferable that some of this tubing be made in 

 colors, perhaps in red and green. 



[3()4] Apropos of an article in The India Rubber 

 World for November, we are requested to furnish names 

 and addresses of those interested in the erection of factories 

 for the production of Guayule rubber in Torreon, Mexico. 



