400 



THE INDIA RUBBER WORLD 



[May 1, 1912. 



AN EDGE CEMENTING MACHINE. 



The British United Shoe Machinery Co., Limited, of the Union 

 Works, Leicester, England, are an amalgamation of the interests 

 of Pearson & Bennin, Limited, The English & American Ma- 

 chinery Co., Limited, and the International Goodyear Shoe Ma- 

 chinery Co., U. S. .A. They make a specialty of producing all 

 the latest shoe and harness making machines, and we give here- 

 with a cut of their No. 2 Edge Cementing machine. The ma- 

 chine known as No. 4 Edge Cementing machine has been con- 

 siderably changed in design Init its use is identical with that of 

 the No. 2 machine and i-uir further remarks refer equally to it 

 and to No. 2. 



The object is to apply the ■ ement to the edges of all classes of 

 folded work in a rapid and effective manner. The capacity of 



Edge Cementing M.\chine. 



the machine is limited only to the ability of the operator, who 

 does not need to be an expert. Compared with ordinary table 

 work one girl with the machine can do three or four times the 

 quantity, and with a contingent saving of about SO per cent, of 

 cement. This is largely effected by the supply being under the 

 absolute control of the operator at all times, thus making it 

 possible to apply exactly the amount required. A further saving 

 as far as cement is concerned is due to the machine being 

 virtuall\- air tight, and when net working, the small strippers for 

 the feed roll move forward and prevent evaporation by closing 

 over it. 



A POWER PUMP FOB TIRES. 



The temptation to shirk the tedious and tiresome work of 

 pumping up a tire by hand, and to travel on a "few pounds 

 less," which is one of the prime causes of tire trouble and in- 

 jury to tires, is born of 

 the inefficient devices used 

 for inflation. The auto- 

 mobilist may avoid the 

 labor, without incurring 

 the risk, by equipping his 

 car with one of the many 

 power tire pumps on the 

 market, of which the Ten 

 Eyck Pump, illustrated, 

 is a type. Installed on the 

 car, this machine is part 

 of the power plant and 

 always ready for service. 

 The act of connecting the 

 pump-hose with the tire, 

 A Power Tire Pump. if there is any pressure at 



all in the latter, brings the piston wheel of the pump into con- 

 tact with the flywheel of the engine and the pump begins to 

 work automatically. As soon as the desired pressure is ob- 

 tained, which can be read on the gauge, forming part of the 



device, the hose is detached from the tire valve, which auto- 

 matically throws the pump out of contact. If the tire is entirely 

 deflated, it is only necessary to touch the starting lever to throw 

 the pump into contact, and the pressure keeps it there. All the 

 pump requires is occasional lubrication and properly inflated 

 tires are assured without labor. [Auburn Auto Pump Co., 

 Forty-third street and Broadway, New York.] 



GASKETS OF METAL AND RUBBER. 



The McKim gasket is not particul.irly new. As a matter of fact it 

 has been in use in one form or another for over 15 years; but it is 

 interesting enough, by reason of its present vogue, to entitle it 



to a paragraph. The ac- 

 companying illustration 

 gives a general idea of 

 its construction. It is 

 named after the inventor, 

 Mr. McKim, who was a 

 railroad engineer living 

 in Denver some 17 or 18 



years ago. 



He conceived the idea 

 that by putting a thin 

 shell of copper around 

 his rubber gaskets, he 

 could keep his joints just 

 as tight, and have the 

 packing serve very much 

 longer. That was the 

 beginning of the McKim gasket. Its general construction re- 

 mains the same today, namely, a thin metal cover around some 

 elastic packing. The elastic packing serves to make the joint 

 tight, and the metal cover serves to hold the packing together, 

 and make it more durable. Where the gasket is required for 

 low pressures and for cold water, the packing consists of rubber, 

 but where extreme heat or high pressure is used, asbestos re- 

 places the rubber. This packing is now used extensively by 

 railroads and 'in power plants of all descriptions. [McCord 

 Manufacturing Co., Detroit, Michigan.] 



THE V. p. SHAFT SPEED COUNTER. 



That "V. P." doesn't stand for vice-president, but rather for 

 vest pocket, because this little counter can be carried around very 

 conveniently in the vest pocket. It is only 3 inches long, but it is 



said to be thoroughly ac- 

 curate. It is intended for 

 use in determining the 

 speed of shafts of engines, 

 pulleys, etc. The tip, which 

 is made of rubber to insure better contact, is applied to the 

 center of arbor or shaft. It registers the exact number of revo- 

 lutions and requires only the taking of the initial reading and 

 the subtraction of that reading from the final reading to obtain 

 the number of revolutions in any given time. [American Steam 

 Gauge and Valve Manufacturing Co., Boston, Massachusetts.] 



ACID-PROOF SHEETING. 



So called acid-proof sheeting made of poor quality, like all 

 other goods of poor quality, is quite unsatisfactory. The Dunlop 

 No. lb Red Acid-Proof Sheeting is subjected to a variety of 

 tests that would seem to constitute conclusive proof of its acid- 

 resisting qualities. Here are some of the tests : 10 per cent, car- 

 bolic solution 30 minutes ; strong cold ammonia for the same 

 length of time ; 50 per cent, alcohol also for 30 minutes ; and 

 boiling soap and water for 10 minutes. Any rubber sheeting 

 that can survive these tests successfully, ought certainly to be 

 practical for ordinary use. 



