THE INDIA RUBBER WORLD 



27 



AUTOMATIC CONTROLLER FOR GAS HEATED MACHINES. 



This device is primarily intended for repair vulcanizers but 

 -^ it is also designed for use on all 

 other gas-burning steam genera- 

 tors, boilers, etc. 



This attachment makes possible 

 a constant and even steam pressure 

 at all times and under all condi- 

 tions. It allows a full flow of gas 

 to bring the steam pressure to the 

 desired point quickly and then 

 automatically cuts down the flow 

 of gas to the e.xact amount needed 

 to hold that steam pressure. Once 

 set, it requires no further attention. 

 Co., .A.lliance, Ohio.) 



Ste.^m Pressure 

 Controller. 



Controlle 



SCALES FOR AUTO TIRES AND TUBES 



Tire and lube faclory methods 

 include checking up the weights 

 of finished tire carcasses and 

 inner tubes to insure uniform- 

 ity of product. This is usually 

 done on ordinary scales that 

 have been changed over for this 

 particular purpose. 



The accompanying illustra- 

 tion of a scale expressly de- 

 signed for weighing inner tubes 

 explains itself. For auto tires 

 it is made in two capacities, 10 

 pounds, and IS pounds, both 

 weighing by one-half ounces. 

 The dial of these scales is 1.5 

 inches in diameter, and fitted 

 with a nickel-plated brass sash 

 and glass measuring 15 inches 

 over all. They are provided 

 with oval-shaped brass plat- 

 forms for conveniently holding 

 the articles to be weighed. (John 

 Chatillon & Sons, 85-95 Cliff 

 street, New York. 



■jflr I' ."^ 



THE HAND-TYPE LECTROFLATOR. 



It is not at all surprising that the bulky tire-inflating appar- 

 atus so often seen in garages and service stations should be sup- 

 planted by a more easily handled device. But it was hardly ex- 

 pected that a light, easily operated and efficient machine of the 

 hand-Dortable tvoe would ever be serviceable as a practical tire 

 intlator. However, the makers of the machine here §hown con- 

 fidently describe its construction and merits. 



The two-piece cast-iron housing encloses the motor, gear- 

 train and the con. pressor cylinder forming an air-jacket through 

 which air is circulated by an enclosed fan. The piston and con- 

 nection rods are of aluminum alloy and the piston is fitted with 

 six ground piston rings. The puppet type valves are of brass 

 with ground seats. The internal gearing, cylinder and shaft 

 bearings are grease lubricated by positive systems. 



The smallest machine has a capacity of two cubic feet of free 

 air per minute, sufficient to inflate a 34 by 4 tire from flat to 80 

 pounds in 1 3-4 minutes. (The Black & Decker Manufacturing 

 Co.. Baltimore, .Maryland.) 



A P()RT.\BLE TiRR iNl'L.MXiK. 



MACHINERY PATENTS. 



MACHINE FOR FORMING SOLID TIRES. 



T^iiE .MA(Hi.\E illusirated is designed to cut and apply to a 

 solid tire base unvulcanizcd rubber to desired and gradu- 

 ally diminishing widths, placing the rubber on the rim auto- 

 matically while hold- 

 ing and rotating the 

 rim. The apparatus 

 consists of a frame 

 suspended opposite 

 the lower rolls of a 

 calender on which 

 frame is mounted 

 cutting disks, or 

 knives, the sharp 

 edges of which are 

 held in loose contact 

 with the middle cal- 

 ender roll carrying 

 a thin sheet of un- 

 vulcanized rubber, 

 from which they cut 

 a strip of rubber. 

 This strip is simul- 

 taneously carried to 

 the wheel rim upon 

 which it is continu- 

 ously wound until 

 the desired height is 

 obtained. 



In operation, a 

 supply of rubber 



having been prepared, the wheel rim .-V is placed in position over 

 an oflf-centcr supporting roller B, the weight of the metal rim 

 presses firmly against the driving roll C, which in turn presses 

 firmly against the lower calender roll D. The wheel rim is 

 held in place as it revolves by the supporting roller B and side 

 guide rollers E and on the driving roller C by side guide rollers 

 F. A strip of rubber of proper width is started from the middle 

 calender roll and guided over roller C to the wheel rim A. As 

 soon as the rubber is built up to the top of the wheel rim flanges 

 the operator moves an eccentric cam lever, this raises a tri- 

 angular cam which increases the distance between the rubber 

 cutting knives G, making the next layer of rubber sufficiently 

 wide to extend across the edges of the flanges. Each additional 

 layer of rubber pushes up the triangular cam, permitting a spring 

 to pull the knives closer together and making each layer a little 



SoLID-TlRE-Bril.DI 



