November 1. 1916.] 



THE INDIA RUBBER WORLD 



S7 



STANDARD DEMOUNTABLE WHEEL SET FOR FORD CARS. 



By means of a set of demountable wheel attachments and a 

 spare wheel, the troublesome operation of changing tires when 

 on the road is greatly simpHtied. A spare wheel is furnished to 



carry a tire already in- 

 flated, and in case of a 

 blow-out or puncture, 

 all that needs to be 

 dijne is to unscrew the 

 four nuts shown in the 

 illustration, change 

 wheels and replace the 

 nuts. The regular 

 wheels already on the 

 car may be used, the 

 special parts furnished 

 with this (lemountalile 

 wheel set rendering 

 them all interchange- 

 ably demountable, one 

 with the other. These 

 special parts include 

 four inner fl a :i g e s , 

 eight flange - retaining 

 bolts and nuts and 16 

 special Inili liolts and 

 nuts. One inner flange and two bolts are used to equip each 

 wheel, while four special hub bolts and nuts should be mounted 

 on each hub. The nuts are of fine hardened steel, rust proof 

 and insensible to damage through severe use. The special bolts 

 are manufactured from high carbon steel of great tensile and 

 torsional strength and are claimed to have a capacity 300 per 

 cent greater than that of ordinary carriage bolts. [The Standard 

 Auto Accessory Co., Leipsic, Ohio.] 



THE BURRILL TIRE TOOL. 



Split demopntable rims require something more thai; ordinary 

 tools to satisfactorily remove them from the tire. The utility 

 of such a device consists, first of all. in compactness and simplic- 

 ity of construction, then 

 facility in applying it to 

 the rim and an easy 

 method of exerting in 

 an even Tnanner t!ie 

 force necessary to re- 

 move the rim. 



As shown in the illus- 

 tration, the two grips 

 are hinged to the right 

 and left-hand screw bolts 

 that form part of what 

 is known as an ordi- 

 nary turnbuckie. Thf. 

 grips are slipped over 

 the rim and with a few 

 turns of the Inimile tlia.. 

 is attached to the turn- 

 buckle, the rim is sprung 

 away from the tire with- 

 out distortion, and easily removed. In applying the rim to a 

 tire, the tool is attached in the manner previously described and 

 the rim lient slightly downward, when it can then be sprung in 

 place. [The P.urrill Tire Tool Co., Concord Junction. Massa:- 

 chusetts.l 



THE LEE PUNCTURE-PROOF GUARANTEED TIRE. 



The users of Lee tircs are provided witli double assurance 

 while motoring, one being a puncture-proof guarantee and the 

 other a guarantee for 5,000 miles. The evils of puncture include 

 roadside delays, discoinf .rt and expense, all of vvhicli are usually 



collated in two fearsome 

 words, "tire troubles." 



Ordinary pneumatic tires 

 are at the mercy of nails, 

 glass and sharp stones that 

 persistently find their way 

 in the path of all motorists 

 one day or the other. Chance 

 only decides how soon the 

 best car and the most careful 

 driver will meet with puncture disaster. 



In the Lee tires, three separate layers of small puncture-proof 

 disks are embedded in the rubber of the cushion that lies between 

 the carcass and the breaker strip, forming a flexible armor of 

 mail. It will be seen by referring to the illustration that while 

 these disks overlap they do not touch each other, thereby avoid- 

 ing the danger of friction and consequent heating. The carcass 

 and tube are thereby protected and it is claimed that resiliency 

 and wearing quality are increased by a special rubber compound 

 and curing process. [Lee Tire & Rubber Co., Conshohocken, 

 Pennsylvania] 



S. A. E. TIRE DIVISION RECOMMENDATIONS. 



At the meeting of the Society of Automobile Engineers, held 

 October 18 at the Bureau of Standards, Washington, D. C, the 

 tire division recommended straight side tires from 32 by 3J^ 

 to 36 by Ayi. as the larger straight sides are not practical. This 

 recommendation was amended with a provision that straight 

 sides be of the wide standard. The report was adopted. 



MOTOR FIRE ENSINE TIRES. 



Tires for motor fire engines present some problems other than 

 those common to motor truck or automobile tires. These en- 

 gines have the weight and bulk of motor trucks, hi;t require to 



Cross Rib Tires for Motor E.n-gines. 



be driven at the speed of the motor car. The main problem is 

 to prevent skidding, and two special tires which are pronounced 

 peculiarly efficacious for this purpose are shown in the illus- 

 tration. One of these shows parallel ribs diagonal to the rim. 

 The other shows two sets of such ribs, at opposite angles, the 

 tread being twice as broad. [The Shrewsbury & Calliner Tire 

 Co. Limited, .Ardwick Green, Manchester, England.] 



The United St.vtes Civil Service Commission, Washington, 

 D. C, announces an open competitive examination for expert 

 electrical and mechanical aid to fill a vacancy in the Bureau of 

 Yards and Docks. Navy Department, and vacancies which may 

 occur in positions requiring similar qualifications. .Applications 

 must be filed with the Commission at the above address before 

 November 14. 



