THE INDIA RUBBER WORLD 



369 



Progress in the Tire Trade. 



THREE KEW INITIALED TREADS. 



WHILE it seems almost impossible that any new designs in 

 anti-skids could be produced, three of the big tire com- 

 panies are out with absolutely new ones. These might 

 be described briefly as initialed tire treads. The Revere Rubber 

 Co., Chelsea, Massachusetts, for e.xample, runs a doulilc row nf 



R's around the circumference. The Hartford Rublier Works Co.. 

 Hartford, Connecticut, does the same with the letter H ; while 

 the G. & J. Tire Co., Indianapolis, Indiana, uses the initials of 

 its corporate name in the same way. The effect is very artistic, 

 and, aside from that, there is no doubt that they will provide 

 protection against slipping just as well as any other pattern. 



A NEW GUARANTEED TIRE 



The new "Ebony Tread" tire has a 

 ribbed tread of tough black rubber, which 

 commends itself to those who desire 

 some marked individuality and distinction 

 in their outfits. 



This tread is the result of exhaustive 

 experimentation, and such thorough and 

 severe tests have been applied to the fin- 

 ished product that the manufacturer places 

 confidence in its endurance to the extent 

 of attaching to every tire a warranty tag. 

 guaranteeing the tread good for 5,00(1 

 miles. [The Pennsylvania Rubber Co.. 

 Jeannette, Pennsylvania.] 



BOWERS BUILDS TIRES. 



The Bowers Rubber Works. San Francisco, 

 California, long a manufacturer of mechanical 

 rubber goods, has entered the tire field, bring- 

 ing out a hand-built tire with a new and 

 effective non-skid tread design. The Bowers 

 company makes a point of the fact that this 

 tire is the result of study and experiment 

 that has gone on for a long time, and feels 

 that it has produced a winner, both in ap- 

 pearance and service. 



Ilead(|uarlers of the Standards Committee of the Society of 

 .Automobile Engineers are now in Xew York City at the 

 offices of the Society in the Engineering Societies Building, 

 instead of in Detroit, Michigan, where a separate office has 

 been maintained for the past year. A. C. Woodbury, recorder 

 of the committee, who has active charge of the routine, has 

 removed his home from Detroit to New York. 



AIR-SEtl 



«in-SEU 



THE DOUBLE SEAL TIRE VALVE. 



Every one knows that pneumatic tires must be air tight in 

 Older to be serviceable. And almost every one knows that a 

 tire cannot be air tight when it is afflicted with a leaky valve. 

 It is claimed that the double seal tire valve 

 will not leak, which is largely due, no doubt, 

 to the use of rubber washers and packing 

 where leaks are liable to occur. 



Tile valve cap, for instance, which is 

 shown above on the right, is provided with a 

 rubber washer. The valve inside, shown 



1 j under the cap, has a rubber washer just be- 

 f~5 low the head, where it is seated on the end 

 ^j of the valve stem. .Mso there is a small 

 ^y sleeve packing of rubber near the lower end 

 ^ of the valve that snugly fits the bore of the 

 " valve stem. Thus it will be seen by re- 

 ferring to the illustration on the left how 

 cficctively the valve is sealed. 



These valves are interchangeable with all standard stems. 

 They can be removed and seated without tools, simply by the 

 fingers. They operate so smoothly that the disagreeable labor of 

 pumping up the tire is greatly reduced. [Double Seal Tire Valve 

 Co., New York Citv.l 



A RUBBER TIRE FILLER. 



Unlike the various preparations that are pumped into the tire 

 for the purpose of avoiding punctures, this filler is made of rub- 

 ber. Small pieces are cut up, treated by a special process, and 

 molded into cyl- 

 indrical annular 

 forms, which are 

 subsequently vul- 

 canized. These 

 forms are made to 

 fit all the dilTerent 

 casings, thereby 

 eliminating the in- 

 ner tubes. The 

 liller is placed in 

 tlie casing in sec- 

 tions, after which it is pressed on the wheel-rim by special tools 

 provided for that purpose. Several advantages are thereby 

 claimed— saving inner tube expense, prolonging the life of the 

 casing, and immunity from puncture troubles. [Xational Rubber 

 Filler Co., Midlothian, Texas.] 



IMPROVED TIRE-TESTING TANK. 



The tire-testing tank in garages is usually a wooden tub, or 

 barrel sawed in two, partly filled with water, which is generally 

 quite dirty — a condition due to the fact that the water is rarely 

 renewed, as the tub has no drainage connection. A new tire-testing 

 tank made of glazed porcelain has been placed on the market. The 

 white porcelain background reflects the bubbles as they rise 

 from the leak in the inflated tube, and the glazed surface facili- 

 tates keeping the tank clean. It stands on a porcelain pedestal, 

 which brings it about 30 inches from the ground, relieving the 

 repair man from the necessity of stooping over while testing a 

 tube. The tank is provided with an outlet that can be connected 

 with sewer or drain. [The Trenton Potteries Co., Trenton, 

 New Jersey.] 



