November i, 1904.] 



THE INDIA RUBBER WORLD 



49 



NEW GOODS AND SPECIALTIES IN RUBBER. 



DODS CROSS EXPANSION PISTON PACKING. 



ENGINEERS long have sought, and rubber manufactur- 

 ers have tried to produce, a cross expansion packing. 

 Rubber cushions have been tried, wedge shaped pieces, 

 and other designs, but often without satisfactory re- 

 sults. The packing here illustrated was first made and used by 



FIQ. 1. FIG. 2. 



Henry Dods, an engineer employed at the famous Comstock 

 silver mine, in the absence of any other packing that would 



meet his special want- 

 This packing is made 

 of layers of duck and 

 rubber placed at a 

 diagonal from every 

 side, and so arranged 

 that an edge of duck 

 faces every bearing. 

 Dods obtained a pat- 

 FiQ- 3. FIG. 4, ent on this packing, 



which patent has been acquired by 

 the manufacturing company named 

 below. The packing is claimed to 

 have a greater cross expansion than 

 any other ; under pressure it will ex- 

 pand 100 per cent. In the illustra- 

 tions P'lg. I shows a piece of the 

 Dods square packing under pres- 

 sure showing an expansion of 100 

 per cent. ; Fig. 2 shows a piece of 

 square packing in general use, which, 

 under the same pressure, expands 

 only 30 per cent. Fig. 3 shows the 

 Dods packing in cross section and Fig. 4 a regular packing 

 in cross section. Fig. 5 illustrates the Dods packing in serv- 

 ice. When placed around vibrating or bent rods, or in uneven 

 stuffing boxes, it will hold steam, air, or liquids. Under pres- 

 sure from the gland it will expand and fill every space, while 

 maintaining a smooth surface against the rod, but without 

 heating the rod. The packing is spiralized and lubricated, and 

 put up in boxes, in 12-foot lengths. [Bowers Rubber Co., San 

 Francisco, California] 



WATERPROOF LEATHER SHOES. 



One oI the large Brooklyn (New York) stores advertises 

 that it controls the factory making a line of men's waterproof 

 shoes, of which this description is furnished : "Made of kan- 

 garoo calfskin, with fine, soft, dongola tops, three heavy soles. 



FIQ. 5. 



with rubber and oil-silk vamp and sole linings. All seams 

 double stitched and reinforced, so as to insure increased wear." 

 The shoes retail at $1.98. 



THE AUTO TIRE PROTECTOR. 

 This illustration relates to a device, a patent on which has 

 been applied for, the object of which is to enable an automo- 

 bilistto"get 

 home " with 

 an injured 

 tire cover. 

 It is referred 

 to as being 

 made of the 

 same good 

 quality of 

 rubber duck 

 thatihe best 

 tires are 

 made of. It 



is laced about the tire by means of ten strong eyelets, set in 

 material of such character that it is impossible for the lacing 

 to pull out. It will run through mud and water without hard- 

 ening or cracking, as all leather and rawhide will do, and for 

 this reason is more durable than tire boots of those materials. 

 It is adjustable without tools, conforms to tires of any size, is 

 noiseless, and runs as smoothly as a new tire. While this pro- 

 tector had not been intended for solid tires— which are not of 

 the same shape as pneumatics— it had a very satisfactory test 

 on a solid tire at Trenton during the recent State fair. A tire 

 on an observation automobile, carrying 25 passengers, was 

 giving away at the splice, and one of these protectors was put 

 on. It lasted for four days, during which time the vehicle was 

 in constant use, running to and from the fair grounds. The 

 list price is §4 each, for use on tires not over 4 inches in 

 diameter; for larger sizes, $4.50. [Empire Rubber Manufactur- 

 ing Co.. Trenton, New Jersey.] 



WEED'S CHAIN TIRE GRIP. 

 An eflfective and compact arrangement for the purpose of 

 preventing the skidding of automobjle wheels in soft earth and 

 sandy soil and in snow is shown 

 herewith, an invention which is just 

 being placed on the market, al- 

 though it has been subjected to two 

 years severe test before being manu- 

 factured commercially. It is called 

 the chain tire grip and is the subject 

 of United States patent No. 768.495, 

 issued August 23, 1904, to H. D. 

 Weed. It consists entirely of small 

 sections of chain held around the 

 entire bearing surface of tne tire by 

 means of larger pieces of chain each 

 side of the rim. The grip is said to 

 .be effective in snow, sand, or ice and its use does not damage 

 the tire whatever. One of the principal merits of the grip is 

 that it takes up almost no room when it is not in use and is 

 being carried on the automobile. It is understood that this 

 device already has met a large sale. [Harry D. Weed, Cana- 

 stota, New York.] 



