362 



THE INDIA RUBBER "WORLD 



[September i, 1901. 



is used more frequently than any other, and has, therefore, 

 added an extra F, so that the new marker has one 5, one M, 

 one W, and two Fi, with figures for all sizes and widths needed 

 In the trade. The operator can mark on an average about 600 

 pairs per hour on the last, and from 1000 to 13,000 per hour off 

 the last. Mr. Venn's address is Box 76, Maiden, Massachu- 

 setts. 



BOWN AUTOMATIC TIRE VALVE. 

 The illustration shows a sectional view of a new automobile 

 tire valve. The Bown valve is the one that has a 

 Utile rubber ball for plunger. It has been used for 

 the past season or two on bicycle tires. The prin- 

 ciple is that of utilizing the air pressure within the 

 tire to force the rubber ball to its seat, thus retaining 

 the air when the pressure from the pump is released. 

 The use of this valve is referred to as rendering it an 

 easy matter to inflate the tire. Other advantages are 

 the simplicity of construction, as compared with 

 some other valves, and the fact that the rubber ball 

 plunger never sticks in the tube. Made by the Bown 

 Tire Valve Co., Limited (Battle Creek, Michigan), which has 

 been organized to introduce the valves made undert he Bown 

 patents. 



NEW CLIFTON IRON ARMORED CONDUIT. 

 This insulating conduit, which has been installed in many 

 large and important buildings throughout the country, consists 

 of the regular standard wrought iron pipe, light and heavy 

 wall, lined with a special coating of rubber compounded with 

 other valuable insulating material. The whole is attached so 

 firmly to the interior of the pipe that it almost forms a part 

 thereof, while at the same time it is flexible enough to allow the 

 pipe to be bent at different angles without injury to the lining. 



It is installed in the same way as other conduits, but in many 

 instances at less expense. In addition to being flexible, this 

 conduit is impervious to water, indestructible by corrosive 

 salts or alkalies, and is not affected by heat up to 300° F. One 

 advantage of the flexibility of the conduit isthat bends or turns 

 may be made, by its use, in places where it would not be con- 

 venient to use elbows. The " Clifton " conduit is made in dif- 

 ferent styles, being rubber lined inside and outside, or inside 

 only. [Clifton Manufacturing Co., No. 65 Franklin street, Bos- 

 ton.] 



DOUBLE LOCKED COMPRESSED TIRE. 

 The point aimed at in the design of the Dewes & Whiting 

 double-locked, endless compressed tire is that it shall stay on 



when It has been fitted to a 

 wheel. The internal lock is made 

 of hard wood, which cannot cor- 

 rode or injure the rubber. In 

 fact, there are no metal fasten- 

 ings to come in contact with the 

 rubber. The wood is held in 

 place by screws from the under 

 or inner side of the felloe, and 

 the steel flanges are attached to 

 the felloe as indicated in the 

 illustration. The tire is made in 

 sizes for automobiles if desired. 

 It has lately been patented [Dewes & Whiting, No. 243 Centre 

 street, New York.] 



RUBBER BUCKET FOR AUTOMOBILE USE. 

 This illustration represents a collapsible rubber bucket de- 

 signed for use in connection with automobiles — for holding 

 water and for other purposes which will suggest themselves 



readily to owners and users of these vehicles. The fact of the 

 bucket being collapsible adds greatly to the convenience of 

 transporting it. [The B. F. Goodrich Co., Akron, Ohio.] 



A SUCCESSFUL DOUBLE TUBE TIRE. 

 The new double tube tire, of which a small sectional view is 

 shown in the illustration herewith, is the subject of a patent 

 allowed on May 28 last. The tire has been in use longer, how- 

 ever ; in fact, it is understood that over 100,000 sets have been 

 marketed. The degree of satisfaction given by this tire is evi- 



PENNSYLVAMA RUBBER CO. 

 ERIE. PA. 



denced by the small number returned to the factory — less than 

 I per cent. — which is an unusual record, when it is considered 

 that this is an unguaranteed tire. In most of the cases where 

 tires were returned, it was only on account of punctures. The 

 method of construction of this tire is explained in a pamphlet 

 that can be had for the asking. [Pennsylvania Rubber Co., 

 Erie, Pa.] 



"STANDARD OIL" DUCK BOOT. 

 This is not, as its name might suggest to some readers, a 

 product of the " Standard Oil " or any other " trust," but is a 

 boot designed to meet the demand of many workmen whose oc- 

 cupation obliges them often to stand in oil. This is, as every- 

 body in the trade knows, one of the most severe strains to 

 which a rubber boot can be put. The designation given to the 

 shoe indicatrs that in the opinion of the manufacturers this 

 boot occupies a place in its field as important as that of the 

 Standard Oil Co. in the oil business. While a rubber boot 

 cannot be made that will withstand oil or grease absolutely, 

 the " Standard Oil Duck Boot " is made especially to meet 

 these trying conditions. The boot is made of a special oil- 

 resisting compound, which has been given a thorough practical 

 test in crude petroleum. The boxes are branded with a repre- 

 sentation of an oil well. [Apsley Rubber Co.] 



