1920] 



THE INDIA RUBBER WORLD 



221 



Xe\v Machines and Appliances. 



Solid Tire Cutting Mach 



MACHINE FOR CUTTING PRESSED ON TRUCK TIRES. 



SERVICE stations find it frequently impossible to press off 

 old tires no matter what size press is used. This is 

 especially true in the case of "stickers" or tires on 

 which tlu- rim has been turned by contact in the street with 

 stones, etc. Very few 

 stations are equipped 

 with presses of sufficient 

 throat opening to handle 

 large size dual tires and 

 in trying to press off 

 these tires the press is 

 broken. To aflford a 

 simple and efficient 

 means for overcoming 

 these difficulties the 

 machine here pictured 

 has been especially de- 

 signed for cutting ofT 

 prcssed-on truck tires. 



The basic principle of 

 the power hack-saw has 

 been combined with the 

 mechanical features nec- 

 essary to perform effi- 

 ciently the wide and varying work required by a machine of 

 this type. The machine is of heavy construction and designed 

 with the idea of giving dependable service under the hardest 

 working conditions. 



The machine has a movable platform which may be raised 

 and lowered so as to take care of any size or height of truck 

 wheel now in use, and it is also of sufficient capacity for the 

 widest single or dual truck tire. It is so arranged that when 

 the blade finishes the cut, it is parallel with the felloe of the 

 wheel and automatically stops just before striking the felloe. 

 In approximately ten minutes' time the machine can cut a dual 

 tire seventeen inches wide. (Racine Tool & Machine Co., Racine, 

 Wisconsin.) 



RECORDING THERMOMETERS FOR RUBBER VULCANIZERS. 



Everywhere lo-day manufacturers of rubber goods realize 

 that temperature has a great effect on the chemistry of vulcan- 

 ization, and that by watching and controlling it ihey can produce 

 the best quality and reproduce it at will. Indeed, given the 

 proper temperature, even an in- 

 ferior grade of material can be 

 used with the confidence of 

 turning out a good product. So 

 vital is the question of temper- 

 ature that more vulcanizers than 

 ever are being equipped with 

 recording thermometers which 

 give accurate information that 

 forms the basis of all intelligent 

 control. 



The accompanying illustra- 

 tions shows a recording thermo- 

 meter and an installation of 

 fourteen of these on rubber 

 vulcanizers at a large footwear 

 plant in Massachusetts. The 

 instruments, equipped with patented improvements, arc of the 

 inverted type and have variable lengths of lead-protected con- 



necting lube and lead bulbs for protection against the fumes 

 ■from the cure. These thermometers depend for their operation 

 upon the pressure of a saturated vapor of a volatile liquid. 

 They are so constructed as to take care of any temperature 

 from plus-50 degrees to plus-400 degrees Fahrenheit, or the cor- 

 responding ranges in Centigrade or Reaumur. The charts have 

 increasing graduations that make the upper or working portion 

 of the scale clear and open, which is an advantage when close 

 readings are a matter of vital importance. 



An automatic temperature controller which not only controls 

 the temperature but also the. duration of the heat may be sup- 



FoxBORO Recording 

 Thermo.metek. 



Footwear Vulcanizer Equipped with Recording Thermo.meters. 



plied, thus making the curing of rubber independent of human 

 conditions and eliminating all hand control. (The Foxboro Co., 

 Inc., Foxboro, Massachusetts.) 



VERTICAL CEMENT CHURNS. 



Vertical cement 

 churns are used in 

 rubber mills when the 

 making of certain so- 

 lutions requires this 

 particular type of 



The machine here 

 shown is supplied by 

 the makers in three 

 sizes, the steel tanks 

 measuring, respective- 

 ly, 24 by 24, 36 by 36, 

 and 48 by 48 inches. 

 They are all equipped 

 with belt-driven agi- 

 tators and gate valves 

 for drawing off the 

 solution. 



While stock mixers 

 are built with steel 

 tanks, they are also 

 furnished with wood 



tanks, vertical shafts and stirring devices made of wood for use 

 in connection with materials that attack iron. (The Patterson 

 Foundry & Machine Co., East Liverpool, Ohio.) 



