2*.-' 



THE INDIA RUBBER WORLD 



I February 1. 1915. 



driven and lias two Wheels, with can 



form iu'lnw the axles. The passenger balances himself on this 

 platform by means of the steering bar and handles, in which are 

 the controls of the selt-o intained motor mounted on the front 

 wheel. 



Fhe Newmastic Co., of New York, had tire fillei on view. 



\ number of the rim manufacturers showed their line — the 

 Ashley Wire Wheel & Rim Co., the General Rim Co., of New 

 York, and the Standard Welding ' <>. of < leveland, Ohio. 



!•'. F.delmann S ' ' hicago, showed tire gages. 



A. Schrader's Son, Inc., oi Brooklyn, showed the full line of 

 valves, tire pressure gages, etc, manufactured and sold under 

 their well and favorably known brand 



Cleveland Worm & Geai Co., of Cleveland, displayed a 

 new tire instrument for removing and replacing clincher tires. 



lire Manufacturers' Association. With its nine sizes each, of 

 tires and runs, it is designed to lake the place of a list of 

 more than 50 sizes of tires. 



THE AUTOMOBILE SALON FOR 1915. 



* I * 1 1 1 Automobile Importers' Alliance. Inc., held an Auto- 

 *■ mobile Salon in the ballroom of the Hotel Astor, Jan- 

 nary 2-9, where many of the foreign cars were exhibited. 



The Canadian Dunlop tires shown at this exhibition were 

 the Traction Tread, a real anti-skid tire, the Cross-Groove 

 in.ul for all-year-round use, and the Dunlop "All-Red" inner 

 tube. The virtues of these tires are set forth in claims for 

 perfect traction, minimum punctures, more resiliency and 

 anti-skidding. 



Another tire of novel tread design is the Faure never-skid. 

 I hese are made with reinforced casings and are furnished 

 in over-size and double-over-size interchangeable sizes. 



The Hardman Tire & Rubber Co.. of Belleville, New Jersey, 



exhibited their single cure wrapped tread tire with the sure 



tread. The manufacturers lay special stress upon the 



process by which the tire is manufactured — the best of material 



and the final cure. 



While Michelin tires were in evidence in the equipment of 

 ral of the exhibits, there was no special display of this 

 well known product. The anti-skid leather tread tire with 

 steel studs is a well made and practical looking tire. There 

 were also cars equipped with Firestone, Goodrich, Silvertown 

 i ord and other standard makes of American tires. 



PROCEEDINGS OF THE SOCIETY OF AUTOMOBILE 

 ENGINEERS. 



IN connection with the annual meeting of the Society of 

 Automobile Engineers, held in New York, January 6-7, 

 the standards committee of that organization at its meeting 

 onsidered and approved the reports of 14 different commit- 

 tees bearing on the question of standardizing different auto- 

 mobile parts, including some of notable interest to manufac- 

 turers of rubber tires. 



Among these reports was one on a new schedule of tire and rim 

 sizes, presented by the pleasure car and commercial car 

 divisions of the standards committee. This schedule, the re- 

 sult of prolonged labor, will specially interest tire makers 

 because of its simplification of their business. In place of 

 the almost endless range of tire sizes, manufacturers are now 

 I Upon to produce and stock, the following sfifedule of 

 nine sizes, adapted for rims of 30 x 3 to 38 x 5;< inches, 

 inclusive, had been prepared by the divisions, together with a 

 list of nine odd or oversize tires, intended for use only by 

 consumers who are desirous of increasing the tire capacity 

 of their cars beyond that intended by the builder. The new 

 which was included in the report of the pleasure 

 . at - division read by Mr. E. R. Hall, of the Goodyear Tire 

 & Rubbi r Co., was adopted without discission by the general 1 

 ing and has been endorsed by the Clincher Automobile 



Rim sizes. 



.ill x 3 



30 x 3,y 2 



32 x 3y 2 



32 x 4 



34 x 4 



34 x 4,yi 



36 x 4</ 2 



36 x 5 



38 -x sy 2 



Even tire Odd or 



sizes for oversize tires 



manufacturers (for con- 



and consumers-. sumers only). 



30 x 3 31 x 3}/ 2 



30 x 3</ 2 31 x 4 



32 x 3</ 2 33 x 4 



32 x 4 33 x 4'/ 2 



34 x 4 35 x \y 2 



34 x 4 1 ■ 35 x 5 



36 x 4 37 x 5 



36 x 5 37 x Sy 2 



38 x 5 ■ . 39 x 6 



A new 36 x 5-inch rim. not previously recommended, iden- 

 tical with the present 4'j-mch or F section rim, is included 

 in the schedule, its width, between flanges, being halfway 

 between the present 4J/2-inch or F section and the S/^-inch 

 or G section rims. Its tire seat diameter will be the same as 

 the present 36 x 5 (26 inches) and the rim will receive any 

 36 x 5 tire at present on the market or manufactured. The 

 oversize, 37 x 5/4 tire, can be used with this rim much better 

 than with the old 36 x 5 narrow width rim. 



A paper on "The Pros and Cons of Tire Inflation," pre- 

 pared by Charles B. Whittelsey, secretary and factory man- 

 ager of the Hartford Rubber Works Co., conveyed some im 

 portant information on the functions of the pneumatic tire, 

 showing how its efficiency as a shock-absorber was dependent 

 wholly on its proper capacity and inflation, i. e., its inter- 

 position of a large enough and sufficiently resilient air cushion 

 between the vehicle and the roadway. As promoting this 

 condition the author favors the oversize tire. 



The importance of proper inflation is referred to also from 

 the standpoint of tire durability, a tire inflated to the right 

 degree being hot only less liable to punctures, blowouts 

 and other tire troubles, but also protected against the ex- 

 cessive wear due to undue flexing, 12 or 14 per cent, of its 

 sectional diameter being quoted as the maximum extent to 

 which a tire should flatten at the point of contact, to give 

 good service. There is. moreover, less heat developed in a 

 tire of the right size and inflation, an important factor in its 

 longevity. Tallies showing the extent to which tires of various 

 diameters should be inflated and the size of tire to be used 

 for different loads, add to the practical value of this paper. 



Another paper in which the manufacturer of rubber tires 

 will be -nterested is by R. B. Mudge and deals with the ob- 

 ject of "Wood Wheels vs. Wire Wheels." As a result of 

 various tests made, the writer claims that the wood wheel, 

 on account of greater resiliency, is more conducive to tire 

 durability than the wire wheel. On the other hand, a paper 

 entitled "Wire Wheels or Wood Wheels," treating in detail 

 with the results of tests made with the two styles of wheels, 

 by George W. Houk, is offered by the author as justifying a 

 claim of 30 per cent, gain in service in favor of the wire wheel. 



As the nature of the papers and reports above referred to 

 will sufficiently show, the proceedings of the meeting were 

 of a character to interest alike the automobile owner and 

 consumer of rubber tires, their manufacturer and the student 

 of automobile technology. 



As a result of the general use of motor vehicles for trans- 

 portation purposes in the war and the difficulty of keeping 

 them shod with rubber tires, the spring wheel is finding 

 extensive use. It is reported that one order from the German 

 government called for more than 5,000 sets of heavy type 

 spring wheels. Should the spring wheel make good, it will 

 mea'-n good news to the inventors an'd patentees of innumer- 

 able devices of this character. 



