370 



THE INDIA RUBBER WORLD 



IJlly 1. 1911. 



INFLATION OF TIBES WITH CARBONIC OAS. 



The vniform and adequate inflation of pneumatic tires adds 

 so materially to their life that any device by means of which 

 this is facilitated, should interest alike the automobilist and the 

 manufacturer of rubber tires, whose reputation and business 

 must be benefited by the increased durability of his product. 

 Automobilists have been using, for the past five years, a device 

 for the inflation of tires with carbonic gas. of which illustrations 

 are presented herewith. One shows the 

 "Baby" tire inflator, connected with the tire, 

 for the purpose of inflating ; the other, the 

 "Improved Baby," which is equipped with a 

 special regulator, for controlling the pressure 

 of gas and a gauge that records the pressure 

 and ensures its perfect control. The tank, 

 which is attached to the foot board, 

 contains the gas liquilied under tremendous 

 pressure, opening the valve permits of its 

 immediate re-assumption of the gaseous form, 

 accompanied by the development of approxi- 

 mately the pressure required for its liquefac- 

 tion. The tanks hold about four pounds of 

 the liquefied gas and about three ounces of 

 this will expand into sufficient gas to fill a 

 completely deflated tire to 70 pounds pressure : consequently, a 

 tank will fill over 20 tires from complete deflation without any 

 effort on the part of the owner or effect about 100 ordinary 

 pumpings up, all that is necessary being to connect the hose with 



Tire Infl.\tion with C.xrbonic G.\s. 



the tire valve and turn on the gas. It is claimed that owing to 

 the fact that the gas contains no free oxygen, its action on the 

 rubber substance is distinctly preservative and as it is the most 



THE ALLEN TIBE FBESSUBE CASE. 



Be.\rinx in mind the importance attached by tire manufac- 

 turers to the proper inflation of tires, many automobilists carry 

 a tire pressure gage as part of their outfit. A convenient device 

 of this character is the Allen Tire Pressure Gage we illustrate. 



The gage is pressed on the valve stem, after the 

 dust and valve caps have been removed, the rubber 

 washer in its end fitting air tight to the rim of the 

 valve and the valve plunger being, at the same time, 

 pressed open, so that the air is admitted to the gage. 

 Acting on a plunger, controlled by an accurate spring 

 tension, which is forced up against the spring pressure, 

 the air pressure is registered by the sliding band that 

 encircles the gage on the outside. When the gage 

 is removed from the valve, this band retains its posi- 

 tion, so that the gage may be taken away for con- 

 venient reading, without affecting the registration. 



The gage is made of substantial brass tubing and 

 nickeled and being but 4J4 x Yz inches, can readily be 

 carried in the vest pocket. [The Allen Auto 

 Specialty Co., No. 1926 Broadway. New York.] 



THE "STAR" NON-SKID TIBE. 

 The St.\r Non-Skid is a type of tire for tlie pre- 

 vention of skidding, the merit of which lies in the fact 

 that it presents an infinite number of angles to the 

 course surface. The tread is closely covered with 

 stars and every star has ten angles. The stars stand 

 out strongly from the tread and it is claimed that 

 a wheel equipped with one of these tires is proof 

 against skidding. [Star Rubber Co., Akron, Ohio.] 



DEVELOPMENTS IN RUBBER ANTI-SKIDS. 



I 'HE Bailey "Won't Slip" was doubtless the pioneer all-rubber 

 ■*• anti-skid, and for a long time its lozenge shaped pro- 

 tuberances were the only decorations that auto tires wore. After 

 a while, however, inventive geniuses began to evolve other styles 

 until there was the "nobby" tread, the "staggard " tread, and a 

 host of others. Almost every geometric figure possible was 

 employed in relief on the tread surface. Some were useful, 

 others not ; a few were decorative ; all were interesting in that 

 they showed thought on the part of the manufacturers. They 

 also made work for the mold makers. There was, however, 

 running through all of those designs a sameness that pointed 

 to imitativeness rather than originality. After w-aiting long. 



Suggestions for Tire Treads. 



effective fire extinguislier known to science, quenching almost 

 instantly a stubborn gasoline flame, its usefulness is manifold. 

 [The Liquid Carbonic Co., Chicago.] 



and in vain, for some genuine artist to rise up and prove his 

 preeminence, a few designs are herewith submitted in the hope 

 that it will stimulate renewed activity in tire tread decoration. 



