September 1, 1917. 



THE INDIA RUBBER WORLD 



721 



THE PRUDEN POWDERED COAL CARBURETER. 



The fuel problem is one that is now forcibly being brought 

 to the attention of industrial executives the world over. With 

 the price of coal reaching abnormal levels, the large consumers 

 are confronted with greatly increased cost of power production. 

 The solution appears to be in the use of low-grade coals and to 

 that end a mechanical device for the utilization of powdered 

 coal has been evolved. 



In the mechanical application of the Pruden carbureter, the 

 air and powdered coal are intimately mi.xed and the mixing 



the vulcanizer receives only dry steam. 

 Co., 90 West street. New York City.] 



[The Driscom-Russell 



intensified in its travel through the burner to the combustion 

 chamber of the furnace. Here the chemical combination of the 

 oxygen of the air and the fuel elements of the powdered coal 

 takes place, resulting in perfect and instantaneous combus- 

 tion. 



The engineering problem of the adaptation of powdered coal 

 as a fuel to a particular plant is first worked out by specialists 

 in a research laboratory by means of a demonstration plant 

 provided for that purpose. The results thus obtained establish 

 on a proven basis the equipment and installation required. [Pow- 

 dered Coal Engineering & Equipment Co., 2401-21 Washington 

 boulevard, Chicago, Illinois.] 



THE STRATTON STEAM SEPARATOR. 



Tlie Stratton steam separator shown in the accompanying illus- 

 tration is designed for the removal of water from steam, and it 

 is particularly recommended to rubber manufacturers for use on 

 the steam inlets of vulcanizers. 



This separator utilizes centrifugal 

 force as the means of separating the 

 water from the steam. As the steam and 

 water enter the separator they are 

 caused to pass through a spiral path 

 formed about a central core. The sud- 

 den change from a straight line flow to 

 this spiral path imparts a whirling mo- 

 tion to the steam and water. Water is 

 200 or 300 times heavier than steam, and 

 therefore does not turn corners as easily. 

 At any turn the centrifugal force throws 

 tlie water against the wall forming the 

 bend, while the steam makes the turn 

 and goes on without the moisture. With 

 a properly formed bend, large or small 

 quantities of water will swing out of the 

 curving steam current, meet the wall at 

 an angle, and slip smoothly along without the slightest spatter 

 or splash, following closely to the wall until the motion dies out. 

 Thus complete removal of water from the steam is secured and 



THE BOLTON VERTICAL BIAS CUTTER, 



Bias fabric cutting machines are very important and most 

 necessary in the making of various rubber goods, particularly 

 in the manufacture of pneumatic tires, footwear and mechanical 

 goods. The 

 standard, hori- 

 zontal bias-cut- 

 ter is the type 

 generally used 

 in cutting t h e 

 strips of fric- 

 tioned fabric 

 that are used in 

 rubber goods 

 m a n u f a cture. 

 As a radical de- 

 parture in de- 

 sign, construc- 

 tion and operat- 

 ing principle the 

 vertical ma- 

 chine here illus- 

 trated presents 

 a v a r i e t >• 1 1 f 



novel and inter- 

 esting features. 

 In operation the 

 roll of fric- 

 tioned fabric is 

 placed in the 

 take-off bear- 

 ings arranged 

 at the back of 

 the machine and 

 the end of the 

 fabric is run be- 

 tween the ten- 

 sion rollers 

 while the liner 

 is wound up on 

 a power driven 

 roller provided 

 for that pur- 

 pose. The fab- 

 ric is then 

 passed over the 

 feed roller at 

 the top of the 

 machine and 

 down the front 

 to the diagonal clamping and cutting device shown in the front 

 view of the machine and which may be adjusted to any required 

 angle. The cutting is performed by a shuttle-like knife that is 

 reciprocated by a rack and pinion gearing driven from the main 

 shaft. .\s the fabric is intermittently advanced a predetermined 

 distance by the top feed roller the fabric is firmly held by the 

 clamping device while the reciprocating knife cuts oiT the strips 

 in successive regularity. The machine occupies a very small 

 floor space. In fact a machine to cut 60-inch cloth on a 60-degree 

 angle occupies a space of 9 feet by S feet with head room of 1-4 

 feet and requires no foundation for its support. Its accuracy is 

 guaranteed and the cutting knife may be changed within a few 

 moments. Two men are required for its operation. [The Gutta 

 Pcrcha & Rubber Manufacturing Co., 126-128 Duane street, New 

 York City.] 



