February 1. 1913.1 



THE INDIA RUBBER WORLD 



249 



although it has been familiar to the Englishman for several 

 seasons — the tire made by the Silvertown Cord Construction. 

 The Diamond Rubber Co. rented a spacious corner just across 

 the avenue from the Garden, at the corner of Twenty-seventh 

 street, and there, where its operation could be commanded 

 through two large windows from the sidewalk, a machine was 

 in motion constructing this "Silvertown Cord" tire. There was 



After the form has completed a revolution, and the rubber 

 lining been entirely covered with the cord, another thickness of 

 rubber is put over it and the process repeated — e.xcept that the 

 cord now runs diagonally the other way. When this layer is 

 completed the tire is ready for its tread. These tires are ex- 

 tremely resilient, rebounding several times when dropped on 

 the floor, and will stand ten times the air pressure to which a 



Main Floor at Grand Central Palace. 



always a crowd of spectators on the walk and another crowd 

 of spectators inside watching this machine at its evolutions. 

 Briefly the tire is made as follows : .^n inner lining of rubber 

 is laid over a wooden form ; the ft)rm is then placed in the 

 machine. A long arm seizes an endless cord (flat, about % 

 inch wide, made of many strands of the best cotton and im- 

 pregnated with rubber) and swings it over the tire form, when 

 two steel hands clutch the cord, bringing it in a double loop 

 down diagonally over the form, fastening each loop to a steel 

 peg on the inner side of the form and releasing it just as two 

 sets of steel fingers reach around the cord and press it tightly 



"Su.vERTowK Cord CnxsiRicTioN" Tire. 



into place. In watching this operation one is lost in admiration 

 at the ingenuity of this machine; it is uncanny in its intelligence. 

 As one observer said : "It can do everything but talk." As 

 the long arm swings back to get another double fold of cord, 

 the form moves slightly forward, and is ready for the next 

 double loop. 



tire is normally subjected. They cost a little more than tires 

 constructed of layers of fabric, but are said to give a materially 

 longer service. 



Here is a somewhat detailed description of the exhibits made 

 by the tire manufacturers. Some of these exhibits were new; 

 some were shown a year ago ; but all are interesting as showing 

 the trend of tire development in this country. 



The Fisk Rubber Co., of Chicopee Falls, Mass., had on ex- 

 hibition a line of heavy-car type tires, including a clincher 

 "Q-D,"' Fisk-Dunlop and bolted-on types, the Fisk Removable- 

 Rim and Pure Para inner tubes. The Fisk "Town-car Tread 

 Tire" is the latest production. The knobs on this tire are in 

 addition to the regular thickness and are arranged in three rows 

 running around the tire, the largest row of studs being in the 

 centre. This shoe also has a ring on either side to take care 

 of the slipping in turning sharp corners. 



The Ajax-Grieb Rubber Co. showed both their smooth tread 

 and their anti-skid, which consists of cross-cuts in the rubber, 

 and is noted for its thick treads and great road-gripping power. 



The Pennsylvania Rubber Co., originators of the "Vacuum- 

 Cup" tread, had a line of their new oil-proof tires, which they 

 claim are not injured by oily roads. 



The New Jersey Car Spring & Rubber Co. tires are made by 

 the one-cure wrapped tread process. The "Clingtitc" tread is 

 a depression instead of a projection construction. The depres- 

 sions are cup-shaped with protruding centres at the middle of 

 the tread, while at the sides they are semi-circular. The cups 

 with raised bottoms are designed to form a vacuum as the 

 rubber is pressed against the road-bed, and the claim is that, 

 as the pressure is released ; the convex bottom automatically 

 breaks the vacuum. 



