60 



THE INDIA RUBBER WORLD 



[October 1, 1912. 



(lone with pneumatic hammers. A gas company in Brooklyn, 

 New York, has 

 found this meth- 

 od greatly pref- 

 erable to the 

 old way. They 

 have a portable 

 air compressor 

 on a large flat- 

 wheel truck ; 

 from this run 

 rubber pipes con- 

 veying the power 

 to the pneumatic 

 hammers. '1 he 

 tools used are 

 chisels with an 

 ■edge somewhere 

 -irom li inch to 

 114 inches in 

 diameter. It has 

 been found that 

 a workman with 

 a pneumatic 

 hammer can ac- 

 complish as much 

 as four or five 

 workmen by the 

 old method, and 

 more than that. 



. ■ ut -h^M- Pneum.mic H.\mmers CuiiiNG Concrete. 

 a straight cnaiK 



line can be drawn which the pneumatic hammer follows ab- 

 solutely, making a clean-cut edge. 



The experiment with the pneumatic hammer was thoroughly 

 tried not long ago in the streets of Zurich, Switzerland, which 

 •were paved with a ten-inch thickness of concrete. It was found 

 •necessary to take up the rails of a street car track, and the 

 pneumatic method was adopted with great success. A recent 

 number of the "Compressed Air Magazine" has a more detailed 

 account of both of these experiments illustrated with a number 

 of cuts made from photographs, two of which, through the 

 courtesy of that magazine, we here reproduce; the first cut 

 showing a single workman chiseling out a line in an asphalt 

 pavement, while the second cut shows a group of workmen 

 taking up a concrete pavement in Zurich. Hard as asphalt is, 

 this pneumatic chisel cuts into it and turns it over as if it were 

 a piece of leather. 



coating and aluminum covering are incorporated with the fabric, 

 making it impervious to climatic influences ; with the furth": ad- 

 vantages that it does not crack nor show dirt, while repairs may 

 be readily executed with ordinary cement and without disfiguring 

 the fabric. 



"Lumina" cloth is made by the Goodrich company in its fac- 

 tory at Akron, Ohio, by special arrangement with the Conti- 

 nental Company of Hanover. Germany. 



GOODRICH "LUMINA' AEROPLANE CLOTH. 



The B. F. Goodrich Co. appears to have made very consider- 

 able headway with its new "Lumina" aeroplane cloth. It will be 

 recalled by those who visited the recent New York Aero Show, 

 that Wright and Curtiss both had aeroplanes there on exhibition 

 in which this particular cloth was used. The Curtiss hydro- 

 aeroplane recently purchased by the Russian Navy, and the 

 Burgess biplane ordered by the United States Army, both are 

 constructed with "Lumina" cloth. 



"Lumina" is a handsome fabric, made from the finest long 

 staple cotton, coated several times over with high-grade rubber 

 solutions of various consistencies, and on one side again cov- 

 ered with aluminum. It becomes to all intents and purposes wind 

 and weather proof. 



The making of a suitable fabric for aeroplane purposes involves 

 several novel conditions. The scantling of a plane is so slight 

 that any warping or shrinking of the fabric will infallibly distort 

 the frames, throwing them out of line and upsetting the true di- 

 rection of flight. In "Lumina" these contingencies have been 

 provided for, as it will neither shrink nor stretch. The rubber 



A RUBBER COAT FOE YOUE STRA'W HAT. 



There is nothing that fills a good man with more sorrow, or 

 drives a wicked man to more profanity, than to pay $3.50 for a 

 superior straw hat. and then immediately thereafter get caught 

 in a pelting rain, and have the handsome, crisp, new headgear 

 turned into a limp candidate for the dump-heap. And that really 



isn't at all necessary ; 

 for here is a rubber 

 hat cover, which 

 weighs next to noth- 

 ing, and can be rolled 

 up and tucked into a 

 corner of a pocket; 

 and yet, when occa- 

 Stravv H.\t with Rubber Cover. sion demands, can be 

 taken out and in a second's time can be adjusted over the straw 

 hat, so that it will go through the fiercest downpour without 

 even getting moist. As some inventive genius has already made 

 it possible to get a pair of rubber footholds so light that they 

 can be conveniently carried in the pocket, if somebody else 

 would only invent a spider-web rubber coat that could be car- 

 ried in the same way, a man would only need three pockets to 

 be able to carry adci|uate protection with him, wherever he went 

 against the worst the elements might do. [National Rubber Hat 

 Protector Co., Nashville, Tennessee.] 



THE STEPNEY ROAD GRIP TIRE. 



The annexed illustration displays in section the extremely 

 heavy rubber tread of the "Stepney Road Grip Tire," the large 

 flat projections in which form an excellent preventive against 



slipping, as they, to a 

 certain extent, adhere 

 to the surface of the 

 road, while their 

 rounded form casts oil 

 one side the stones and 

 other objects which 

 may come in the way. 

 The thickness of the 

 projecting portions 

 tends to prevent nails 

 and other sharp substances from penetrating the surface of the 

 tire or the inner layers of linen, thus imparting a marked ca- 

 pacity of resistance. 



Another specially made by the same concern is the "Stepney 

 Tire Cover." This cover, it is claimed, permits the use of old, 

 torn, or burst tires, instead of their being thrown away or sold 

 as old rubber. It is shown in position A on annexed illustra- 

 tion, and is made of heavy linen impregnated with rubber, fit- 

 ting the tire. With burst tires, it is recommended before put- 

 ting on the cover to patch the hole with a linen rag and to 

 vulcanize the surface or to apply rubber solution, so as to pre- 

 vent w-ater or dirt from getting in. [Stepney Auto-Reserve 

 Wheel Tire Co., Limited. Berlin. 39.] 



.Should be on every rubber man's desk — The Rubber Trade 



Directory of the World. 1912. 



