June 1, 1919.] 



THE INDIA RUBBER WORLD 



489 



made tire, with the result that there is no distortion of the fabric 

 at the points where the fabric is overlapped or spliced. This 

 difficuhy frequently occurs when both sides of the carcass are 

 spun down at the same time and in the same direction from 

 the median line of the core. 



Briefly, the operation of the machine is as 'follows. After 

 the fabric has been fed to the core, the latter is rotated forward 

 at a fast speed and the spinner held against that side of the 

 fabric in which the warp threads extend diagonally rearward, 

 relative to the direction of movement of the core. When one 

 side of the fabric has been spun down, thus maintaining the 

 proper position and tension of the warp threads, the core is 

 stopped, the treadle depressed to unlock the core-holding arm, 

 which is then rotated to bring the opposite side of the core 

 into position to be engaged by the spinner. The lever handle 

 is then operated so as to reverse the rotation of the core, and 

 the remaining side of the fabric is thus spun down in the proper 

 way, to preserve or produce the necessary tension on the warp 

 threads. (F. W. Kremer, Rutherford, New Jersey.) 



NON-EXPLOSIVE SAFETY CEMENT CANS. 



Rubber cement is used to join together the seams of rubber 

 footwear, clothing, hot-water bags and toys, and in the manu- 

 facture of tires, tubes, and many other rubber articles. The 

 fumes of the solvents 

 used in the manufacture 

 of cements contaminate 

 ^^!ir \ r * " ,^i_^^ "• the air to the injury of 



V?^ ^~"^ > .^J' the workers, and often 



result in serious explo- 

 sions, unless carefully 

 guarded. 



As examples of what 

 has been accomplished 

 to overcome these diffi- 

 culties, three types of 

 safety bench cans for 

 Safety Bench C.\-s. rubber cement or gaso- 



line are presented in the accompanying illustrations. The bench 

 can with a removable cover is provided with a floater valve 

 which rests on the gasoline or rubber ce- 

 ment and allows the operator to use a light 

 brush where a small quantity 

 is desired. When the float is 

 pressed down slightly the li- 

 quid is automatically forced 

 up through the fine screen and 

 flows back through the screen 

 when the pressure is released. 

 There is no danger from ex- 

 plosion in a can of this con- 

 UPRir,HT^NDHuRizo\T\L T\PES struction, which has the addi- 

 tional feature of economy in the use of gasoline. This type of 

 can may be used for any volatile liquid in rubber mills or re- 

 pair shops. 



The two smaller cuts illustrating, respectively, the upright 

 and horizontal types of rubber cement pots constructed after 

 the fashion of drinking vessels for poultry, permit only a small 

 quantity of cement or gasoline to stand in the brush receptacle, 

 thus minimizing the escape of fumes into the atmosphere. 

 (McNutt Can Sales Co., Inc., 254 Church street, Xew York 

 City.) 



A NEW METHOD OF EXTINGUISHING FIRES. 



When fires occur in chemicals, acids, or oils, they are usually 

 marked by e.xtremely high temperatures ; so high, in fact, that 

 water, even where it can be made to stay on the surface of the 



fire, is unable to extinguish it by cooling, as it is immediately 

 vaporized by the heat and the vapor blown away by the wind or 

 sucked away by the draft of the fire 

 itself. But in most cases the water, 

 being heavier than the liquid, sinks to 



FlREFO.\M EiNGINE. H\ND E.XTINCUISHER. 



the bottom, where it can do no good. In fact, it usually does 

 harm, as it spreads the burning liquids over a larger area. 



The method here described utilizes the well-known smothering 

 ability of carbonic-acid gas. But in this method the gas is not 

 left free to be blown away, but is held on the surface of the 

 burning substance in the form of very minute bubbles in which 

 the carbonic-acid gas is confined. This mass is said to be an 

 almost perfect non-conductor of heat. It is lighter than liquids 

 and, consequently, floats on them. If spread entirely over the 

 surface it must cut off the supply of oxygen completely and 

 quickly smother the blaze. When applied to solid substances it 

 coats the surface and kills the fire by preventing air from reach- 

 ing it. (Foamite Firefoam Co., 200 Fifth avenue. New York 

 City.) 



PORTABLE AIR COMPRESSORS FOR TIRES. 



This new outfit consists of a one-half horse-power electric air 

 compressor, having a capacity of two cubic feet of free air per 

 minute, together with a cylindrical pressed steel reservoir, 14 inches 

 by 30 inches, mounted on three 

 wheels and provided with a han- 

 dle, so that the whole can be 

 wheeled about as circumstances 

 require. The reservoir holds suf- 

 ficient air at one filling to inflate 

 five average tires from flat to full 

 pressure or ten tires from 40 to 

 80 pounds. The outfit is complete 

 with switch, electric cable, at- 

 tachment plug, pressure gage, 

 safety valve, 25 feet of hose, tire 

 connector, and all necessary piping 

 and wiring. The motor operates on alternating current of 60 

 cycles or less and direct current. The motor, gear train and 

 compressor are enclosed in one housing. The motor and com- 

 pressor are cooled by forced circulation of air through this com- 

 mon housing, and the motor, gears and compressor, including 

 cylinder walls and piston, are grease-lubricated. (Black Sc, 

 Decker Manufacturing Co., Baltimore, Maryland.) 



Portable Air Pump. 



MACHINERY PATENTS. 

 COMPRESSED ASBESTOS SHEET PACKING. 



DUE to the elimination of German competition, the manufac- 

 ture of asbestos sheet packing of the Klingerit type is 

 becoming an important division of rubber goods manufacture. 



The process here illustrated relates to the continuous manu- 

 facture of joint-making material and consists in applying to one 

 or both faces a surfacing material of finer quality or of different 

 color. 



