February 1. 1917. 



THE INDIA RUBBER WORLD 



267 



New Machines and Appliances. 



A KUBBER MILL STEAM TURBINE. 



THE reciprocating steam engine as a factor in the produc- 

 tion of power for industrial purposes is now generally con- 

 ceded to be almost negligible. True, there is occasionally 

 found in modern plants that well-known type of reciprocating 

 engine, the Corliss, which has dominated the held for many years. 



Moreover, in tnodern practice its use is more or less sentimental 

 and rather unpractical, for the steam turbine has long ago proved 

 its superiority in the production of power. 



The engineering executives of the large rubber factories have 

 not failed to appreciate the many advantages of the modern steam 

 turbine, and several mstallations have been made in the larger 

 mills. The accompanying illustration shows a steam turbine and 

 generator in operation in the plant of the Firestone Tire & 

 Rubber Co., Akron, Ohio. This turbine has a maximum capacity 

 of 10,000 kilowatts [13,333 horse power] ; the steam consumption 

 is approximately 14 pounds per kilowatt, through a range of 

 J4 load to \'/i load. The turbine is operating on 175 pounds 

 steam pressure, 50 degrees superheat, and exhausting into a sur- 

 face condenser under 28j2-inch vacuum, and generating at 2,200 

 volts. The air for generator is passed through a modern type of 

 air washer, thus giving very much lower temperature rise on the 

 generator. [The General Electric Co., Schenectady, JSfew York.] 



A NEW THREE-WAY DELIVERY HEAD STRAINING MACHINE. 



In reclaiming devulcanized rubber and the preparation of new 

 rubber, particles of fiber, metal and other impurities are re- 



three-Vay delivery type of straining machine is recommended. 



Thq illustration is that of a 6-inch, self-contained strainer, 

 equipped with motor-drive, automatic self-starter and stock- 

 vvoim" cooling device. It is built in accordance with the well- 

 known excellence of design, material and workmanship character- 

 istic of all Royle products. 



The large straining area provided in this multiple head and 

 the simplified straining parts that may be quickly interchanged 

 are salient features in securing a maximum production. No less 

 important is this specially constructed stock-worm and hopper 

 proportionately designed to handle large quantities of material 

 without clogging the machine. 



To insure perfect alignment and efficient operation of the 

 rapidly moving parts, the machine, out-board bearing and motor 

 are mounted on a continuous bed-plate of substantial construc- 

 tion. 



Rubber compounds vary in composition, requiring different 

 stock-worm speeds in order that the maximum straining capacity 

 may be attained at all times. This is obtained by a standard form 

 of variable speed motor drive that is shown in the illustration. 

 [Jr)hn Royle & Sons, Paterson, New Jersey.] 



HAND AND POWER BRUSHES FOR RUBBER WORKERS. 



That brushes of various sorts are used in the rubber mills is 

 generally accepted as a fact of comparatively minor importance. 

 But upon investigating the subject it would appear from the 



variety of standard sorts in 



use, and the many types ilp- 

 signed for special purpn^cs, 



that the brush problem in a rubber 

 mill is by no means the least in im- 

 portance. 



There are, first, the hand brushes 

 such as the counter, bench and floor 

 brushes, that are made of good 

 stock and in such a manner as to 

 conserve their usefulness and not 

 shed the bristles. Fine steel wire hand brushes with bristles of 

 round tempered wire suitable for cleaning molds, cores and metal 

 surfaces are made in accordance with the particular use for which 

 they are intended. 



Power brushes are of the rotary type and are principally used 

 by tire manufacturers for roughening the casings before cement- 

 ing and applying the tread. The bristles are of carbon steel wire 

 and are made in sections which when worn out may be readily 

 replaced. The complete wheels with brass or steel hubs are 

 furnished in sizes varying from 6'/^ to 15 inches in diameter and 

 from Ijj to ,5-inch face. Of this type are the special rotary steel 



moved by a mechanical straining process. Where large capacity 

 that requires continuous, high-speed operation is desired the 



bruslu-s operated on a buffing stand or flexible shaft drive for 

 cleaning tire molds and cores. They are made in different sizes 

 and shapes with bristles soft or stii^ according to the work re- 

 quired of them. Special rotaries are made as small as 3 inches 

 and as large as 36 inches in diameter, with faces as wide as 6 

 inches. 



