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THE INDIA RUBBER WORLD 



[February 1, 1914. 



A Few of the Latest Tires. 



The New Demountable Rim. 



A NEW DEMOUNTABLE TIRE HIM. 



THE drawing herewith shows a new demountable rim upon 

 which a patent has been granted to Joseph M. Gilbert, and 

 one-half a.ssigned to the B. F. Goodrich Co., one-fourth to 

 the Goodyear Tire & Rubber Co. and one-fourth to the United 

 States Tire Co. This rim is so constructed as to make it im- 

 possible to assemble the parts and place the tire on the rim 

 unless the latter i s 

 properly locked. The 

 rim comprises two 

 sections A and B 

 which are provided 

 with interlocking 

 lugs. Section A has 

 a scries of lugs C 

 which fit into r e - 

 cesses in the lugs D 

 of section B, these 

 lugs being so spaced around the rim that when the two parts arc 

 placed together and moved in opposite directions, the lugs will 

 engage as shown. In order to prevent the two parts of the rim 

 from moving relatively to each other, a lock E is arranged to 

 fit between one pair of lugs. This lock is hinged at F so that 

 it cannot become detached and mislaid. If the attempt is made 

 to place the rim on the wheel with the lock out of engagement, 

 it will strike against the felloe of the wheel. It is thus absolutely 

 necessary to secure the lock before the auxiliary rim can be 

 placed on the wheel, making it impossible to accidentally leave 

 the rim sections unlocked, 



ANOTHER PUNCTUKEPROOF PNEUMATIC, 



Among the many types of automobile tires which have re- 

 cently been patented is one of entirely new design. It is of 

 the pneumatic type but has no inner tube. This tire is designed 



with the intention of elim- 

 inating blow-outs and rim- 

 cutting and to provide a con- 

 struction by means of which 

 a puncture will be automat- 

 ically sealed. Referring to 

 the drawing, the tire consists 

 of a rubber tread A, the 

 beads of which are clamped 

 between the metal rim B and 

 an inner metal band C. A 

 curved band or bridge of 

 rubber D is placed inside the 

 inner rim, and between this 

 bridge and the outer tread is 

 a rubber filler E. The space 

 /• is tilled with compressed 

 air, through the valve (.'. 

 and the pressure exerted by 

 this air tends to force the 

 band D outward, thus clamp- 

 ing the beads of the tread 

 tightly between the two 

 metal rims, and forming an air-tight construction. With such a 

 tire it is easily seen that a puncture would be very rare, but in 

 case any sharp object pierced the tread and band D, the puncture 

 would be automatically closed, since this band is always under 

 high compression, due to the action of the air in forcing it out- 

 ward. [U, S, Patent No, 1,077,310. B. C. Seaton, Detroit, 

 Michigan.] 



Se.^ton Tubeless Pneum.'^tic 

 Tire. 



Duplex Inner Tube. 



NEW PUNCTURE PROOF PNEUMATIC TIKE. 



Differing radically from the usual type of pneumatic, a new 

 form of tire known as the Duplex has recently been placed upon 

 the market. This tire is an adaptation of the two oldest prin- 

 ciples applied to the 

 inner construction of 

 pneumatic tubes. A 

 .■-Uidy of the cross sec- 

 tional view tells the 

 complete story. First, 

 under the tread of the 

 tire comes the semi- 

 circular section A. This 

 section is a special rub- 

 ber composition which 

 is claimed not to be af- 

 fected by heat, cold, or 

 moisture. Between the 

 filler and the rim is a 

 i protector B which en- 

 closes the air tube C. 

 The protector is con- 

 structed of rubber and 

 fabric, while the tube is of the usual construction but of smaller 

 size. The Duplex inner tire can be installed in any casing and 

 on any style of rim. It will be seen that while the tire is really 

 pneumatic, it is at the same time puncture-proof, since the air 

 tube is at a safe distance from '.he tread. [The Duplex Inner 

 Tire Co., 3147 Locust street, St. Louis, Missouri.] 



THE NEW GOODYEAR DETACHABLE TKEAD TIRE, 



The Goodyear Tire & Rubber Co. of Akron, Ohio, has brought 

 out a new type of pneumatic tire which possesses features of 

 interest. The new tire consists of the usual tire carcass and a 

 detachable rubber tread. When the tire is deflated the tread is 

 easily removed, but when under the proper air pressure the two 

 parts possess the strength of a one-piece tire. This makes it 

 possible to replace either the inside or the outside portion in a 

 few minutes, either on the road or in the garage, whereby prac- 

 tically a new tire is obtained at about half the usual price. A 

 special construction that gives the edges of the detachable tread 

 an unstretchable bead, provides the necessary grip to hold it in 

 place and to protect the inside from dirt and water. The tread 

 portion does not bear any of the inner tube strain and no 

 mechanical fastenings of any kind are necessary. The tread 

 may be made with either a smooth surface or with anti-skid 

 projections. 



TO KEEP RIMS FROM RUSTING. 



.\n employe of a large tire company imticed that many thou- 

 sand tires were returned each year damaged by rim rust. He 

 cogitated on the subject and finally invented what he calls an 

 "anti-rust rubber coating," which he believes will absolutely 

 prevent the rusting of the rim. It is made of rubber and 

 graphite and a solvent. It dries in a few minutes and is im- 

 pervious to water. The manufacturers believe that it should 

 reach a sale of a million dollars a year, based on these calcula- 

 tions, viz. : that there are a million motor cars and trucks in 

 operation in this country and that each one of these should use 

 at least a can a year, at a dollar a can. Probably the manufac- 

 turers would be satisfied even if there proved to be a little 

 shrinkage from these figures, [The Anti-Rust Co., Akron, Ohio.] 



