130 



THE INDIA RUBBER WORLD 



[January i, 1904. 



,<^V ,r ~ , T 1 ~~ r ~~ir r> 



ed is a flat channel, either edge of which consists of a metal 

 ring encircling the wheel ; against these edges the wires of the 

 tire cover impinge and obtain the bearing which holds the 

 cover in place. Each ring has a turnbuckle, by means of 

 which they are made larger or smaller in diameter, thus per- 

 mitting them to be slipped off, or 

 clamped in position, as the case may 

 be. With either ring removed, the tire 

 may be pushed off the rim, easily and 

 quickiy, the only tool required being a 

 small punchlike steel instrument with 

 which to work the turnbuckle. A nail 

 could be made to answer the purpose. 

 A better fit of the tire is claimed, pro- 

 ducing less friction and wear, and add- 

 ing an element of safety. The tire does 

 new dunlop tire. no t have to be squeezed or pressed into 

 [Sectional Cut.] place but after being taken off is 



simply laid back in the groove and the detached rim fitted 

 on. Incidentally, the new outer cover has been changed some- 

 what in section, which results in a better distribution of the 

 tension on the cover and renders it less liable to puncture. The 

 new Dunlop feature is made under a United States patent issued 

 last year and is manufactured exclusively by the Hartford Rub- 

 ber Works Co., 

 which concern 

 controls the 

 patent. Num- 

 erous experi- 

 ments were 

 made at Hart- 

 ford during the 

 fall with the 

 tire before it 

 was placed on 

 the market, 

 and with the 

 most satisfac- 

 tory results. 

 Among other 

 things the tire 

 new dunlop tire. was run 10 



(Tire on Rim, with one Retaining Ring Removed.] miles Over in- 



different roads, absolutely deflated. The only evil result was 

 that the tire crept to some extent and the valve stem was cut. 

 The tire did not come off and showed no very serious wear. 

 These tires are being made very heavy on the tread and of a 

 high quality of material, and are consequently rather expensive 

 running from $175 to $240 per set. 



The Manhattan Rubber Manufacturing Co. (New York) will 

 actively push the MacMahon solid rubber vehicle tire this 

 year. As shown in the accompanying sectional cut, this tire 



is held in place by two 

 longitudinal wireswhich 

 run on the outside next 

 to the rim flanges and 

 fit over projections on 

 the rubber. This gives 

 a solid rubber tire with- 

 out any holes for re- 

 straining wires, and one 

 that can be run until it 

 is worn down from the 

 outside. TheMacMahon 

 macmahon tire. tire is set in the channel 



up n a fabric base, which is another distinctive feature. This 

 is designed to do away with the tendency to escape from the 

 retaining device which appears when more rubber than is ac- 

 tually necessary is 

 forced into the 

 channel. It also 

 obviates any tend- 

 ency to creep, and 

 it permits the tire 

 to carry its load 

 naturally without 

 being compressed 

 against the rim 

 flanges. It is 

 claimed that the 

 fabric base of this 

 tire will remain 

 practically in ex- 

 actly the same po- 

 sition in which it 

 is put on the 

 wheel until the 

 tread is entirely 

 worn away. The 

 tire weighs lighter 



than other tires of new dunlop tire rim. 



similar capacity, and therefore is comparatively less expen- 

 sive. The tire is made in all standard sizes for vehicles, from 

 the light road wagon to the heavy truck. It is made to tit 

 the standard channel. There is no resetting necessary, for the 

 tire holds throughout its life in the same shape and there is 

 no wearing or cut- 

 ting by wires. 



The T e n n an t 

 Auto-Tire Co. 

 (Springfield, Ohio) 

 are reported to be 

 actively organiz- 

 ing their trade, for 

 1904, in the auto- 

 mobile tire pat- 

 ented by Irving 

 Tennant and de- 

 scribed in The In- 

 dia Rubber 

 World of August morgan & wriqht detachable tire. 



1, 1903 (page 428). The tread of this tire is protected against 

 punctures by an annular flat metallic strip, lying between two 

 layers of fabric. Manufacturing arrangements have been made 

 with the Springfield Rubber Co. 



The Fawkes rubber tire, which is being exploited from Den- 

 ver and has been illustrated in The 

 India Rubber World, will be ex- 

 hibited at the Automobile shows. 

 This belongs to the cushion type of 

 tires, to which new additions are 

 constantly being made, and it appears that 

 this season will witness a more active cam- 

 paign than for sometime past in behalf of 

 tires of this class. It is recognized, of 

 course, that the best pneumatic tire is lia- 

 ble to puncture in an emergency, and there 

 are many automobilists who feel that the 

 solid tires, while free not liable to punc- 



r NEW DIAMOND 



tures, do not afford sufficient resiliency. tire lug 



