April 1, 1921 



THE INDIA RUBBER WORLD 



499 



lowers the necessary mechanism.— Pierce Wrapping Machine Co., 

 Chicago, Illinois. 



A QUICK CLOSING VULCANIZER HEAD 



A vulcanizer door of simple design that is self-sealing, and 



moves on roller bearings 

 is shown in the accompa- 

 nying illustration. The 

 head is made of high 

 grade cast steel with all 

 bearings either roller or 

 ball. The design makes 

 balance perfect and per- 

 mits the door to be easily 

 opened by one man, 

 swinging in half the 

 space usually required. 

 It is perfectly universal 

 in movement, and can be 

 opened without binding, 

 swinging to and fro with 

 utmost freedom. The 

 door is built complete 

 with vulcanizer shell in 

 The Adamson Self-Sealing Door all standard sizes up to 

 96-inch diameter, for any desired pressure and any length. It is 

 easily adapted to installations by use of a special shell ring. — 

 The Adamson Machine Co., Akron, Ohio. 



WOOD APRON CONVEYORS 



A most effective installation is that shown in the illustration 

 which is typical of how leading rubber and other industrial 



Conveying Coal and Ashes in an .Akron Rubber Mill 



plants are keeping on the move such materials as coal, ashes, raw- 

 materials and outgoing products. 



For handling coal and ashes the equipment consists of a track 

 hopper, plate feeder, single roll crusher, and bucket conveyer. 

 For handling material such as cases of crude rubber and other 

 materials, an apron conveyer is furnished. — The Jeffrey Manu- 

 facturing Co., Columbus, Ohio. 



A BRITISH MACHINE FOR BUILX>ING SOLID TIRES 



This machine for building solid tires direct from the calender 

 consists of a sturdy frame on which is mounted independent 

 gearing for driving a face plate with adjustable arms, arranged 

 to take all standard sizes of truck tire rims. The arms are 

 expanded and contracted by a hand-wheel and screw, thus afford- 

 ing means for placing and removing the rims. 



The machine is placed in front of a three-roll calender, having 

 rollers approximately 27 inches long by 12 inches diameter, pro- 



vided with cutting knives, to supply three widths of rubber 

 sheet, which are built up on the rims. The driving mechanism 

 is so arranged that the periphery speed of the tire, as it becomes 

 larger in diameter, is regulated to suit the speed of the calender. 

 Pressure is applied on the rims during the building up operations 



The Shaw Solid Tire Builder. 



by means of rollers suspended on wheels, provided with balance 

 weights. — Francis Shaw & Co., Limited, Bradford, Manchester, 

 England. 



STEAM TURBINE FOR PUMPS AND BLOWERS 



A new turbine of the Curtis type suitable for driving centrifugal 

 pumps, blowers, etc., has recently been developed. The turbines 

 are of one, two, or three stages, and operate at steam pressures 

 of from SO to 300 pounds, with or without superheat, and either 

 condensing or non-condensing. 



The turbine is constructed throughout to give the greatest 

 .strength and rigidity possible, and the casing is divided hori- 

 zontally in halves, the upper of which can be easily raised for 

 inspection or removal of the wheels. The steam connections are 

 arranged so that they need not be disturbed when it is desirable 

 to remove the top of the casing. 



The turbine is equipped with speed control in the form of a 

 centrifugal governor, and if desired an emergency governor. The 

 first is of the centrifugal tension spring type, the motion of the 



Curtis Steam Turbine 



weights being transmitted through ball-bearing connections to the 

 governor valve. The speed may be adjusted while the turbine is 

 running by a simple operation of the governor valve. The emer- 

 gency governor, if attached, operates entirely independently of the 



