December 1, 1915.1 



THE INDIA RUBBER WORLD 



121 



new one inserted for pressing, while the press is doing actual 

 work. The press is made entirely of steel castings instead of 

 built-up beams and cylinders. A very low moving table makes 

 it unnecessary to lift the tires, thus making handling easier. 

 The ram is brought down to the work through idle stroke with 

 tank water so that no power is required except for actual work. 

 The press is controlled by a patented operating valve so de- 

 signed that when the press is at rest the water is automatically 

 by-passed." (Southwark l-'nundry & Machine Co., Philadelphia, 

 Pennsylvania.] 



THE C. C. PRESSURE REGULATOR. 



Whenever it is necessary to use steam or air at a pressure 

 lower than that of the initial pressure an automatic pressure 

 regulating device is recommended. Such regulators are useful 

 in rubber mills, particularly in connection with vulcanizers and 

 dryers. 



The C. C. Pressure Regulator, Type A, shown herewith, is 

 a simple main valve operated by a piston under the control of 

 an auxiliary valve. The adjustment of the auxiliary val\e and 

 the control of the service pressure are 

 effected by a hand wheel which com- 

 presses a regulating spring. 



The operation is as follows : To start 

 the regulator turn the hand wheel 1 (Fig. 

 1) to the right, 

 compressing the 

 regula ting 

 spring 2. Dia- 

 phragm-hub 5 is 

 forced inward, 

 deflecting the 



diaphragm 6 which, abutting the stem 

 of auxiliary valve 7, moves it away 

 from its seat, allowing steam from the 

 inlet to pass through drilled passage S, 

 through the auxiliary valve port, and on 

 into annular groove p. Connecting with 

 this groove is drilled passage w (Fig. 

 2), through which steam passes to the 



top of piston II. The piston // being of greater area than 

 the main valve 12, the latter is forced from its seat, permitting 

 steam to enter the service system. 



The pressure in the service side of the valve is introduced 

 into the chamber 13 (the inner side of diaphragm (5— Fig. 1) 

 through drilled passage 14, shown in both Figs. 1 and 2. 



When the steam pressure against the inner side of the 

 diaphragm 6 is greater than the pressure of the regulating 

 spring 2 on the outer 

 side, the latter is forced 

 back. The auxiliary 

 valve 7 is permitted 

 to close, cutting ofif 

 the supply of steam 

 above the piston //, 

 and tlic main valve 12 

 closes. As the 

 service pres- 

 sure falls, 

 the regula- 

 ting spring 

 2 again de- 

 'uj fleets t h e 



iliaiiliragm (5. which 

 opens the auxiliary 

 valve 7, followed by 

 the opening of the 

 main valve 12. 

 lalancc between two 



forces, the regulating spring 2 on the outer side, and the service 

 pressure in chamber 13 on the inner side. The degree of com- 

 pression of the regulating spring .' determines the service pres- 

 sure which is automatically maintained up to the capacity of 

 the regulator. The service pressure is not affected by fluctu- 

 ations of the initial pressure so long as there is sufficient ex- 

 cess of the latter to furnish the necessary operating power. 



The dirt and scale usually carried by the steam is caught by 

 the metal screen 20. [Crane Co.. Bridge|)ort, Connecticut.] 

 REED POWER PATTERN GRADER AND CUTTER. 



Footwear patterns cut by hand are always imperfect and have to 

 be carefully trued up, also by hand, before the binding edge can 

 be put on. The power machine, illustrated herewith, operates 

 with a pantagraphic movement, cutting and grading the patterns 

 in one rapid operation, completely ready for the application of 

 tlic binding edge. 



The machine can be set for any size by an automatic mechanical 

 device necessarily accurate and always uniform. Gage scales 

 secure perfect and uniform grades which require no further al- 



teration or filing. By the use of these scales, patterns may be 

 reproduced by merely keeping record of the gage number on the 

 pattern — thus allowing repeat orders to be easily filled. 



The variety of work which may be accomplished includes 

 keeping laps even on all sizes ; grading difficult and stay patterns ; 

 locating eyelet holes and grading top facings. By using traces 

 of different sizes, patterns may be cut out either of full size or 

 with allowance for binding. The cutting mechanism consists of 

 a punch and die, making 2,100 strokes per minute. The power 

 may be furnished through belts or electric motors. Factories 

 equipped with this machine should turn out a new set of finished 

 and graded patterns in half the time now required. [Charles E. 

 Reed & Co., Chicago, Illinois.] 



The diaphragr 



MACHINERY PATENTS. 



PRICE'S VACUUM CHAMBER TUBING MACHINE. 



IN order to obtain rubber in a compact form free from air, 

 moisture and gases. Price has invented this apparatus for the 

 treatment of plastic materials. 



The accompanying longitudinal section shows only one of the 

 several ways in which the rubber may be fed to the cylinder A. 

 The feed hopper D may be horizontal and diversed tandem, or 

 feed rolls arranged in the hopper, or a feed plunger in the hopper 

 used to force the material to the cylinder. 



