90 



THE INDIA RUBBER WORLD 



[December i, 1902. 



bien registered for this new preparation. [The General Elec- 

 tric Co. (1900), Limited, 66-88, Queen Victoria street, London.] 



BOYD SWINGING HOSE RACK. 

 In this device the rings by which the hose is suspended have 

 an opening in the lower side, through which the hose is in- 

 serted. The rings cannot be lost, as they 

 \£,\ i^.-fRlcTi "ever leave the hose aftei being attached 

 ^slii^^VOj^ thereto, and they are of sufficient size to 

 permit the hose to fill out to full diameter 

 when water is let into it, and they do not in 

 any way retard the free flow of water through 

 the hose when occasion arises for the use of 

 the same. These 



racks possess a 

 great improve- 

 raent over such 

 hose holding de- 

 vices as have a lot 

 of loose pins or 

 pegs which fall to 

 the ground when 

 the hose is re- 

 moved and are lia- 

 ble to become 

 -^UsL-'U broken or lost. 

 These racks are made in aluminum finish or any color enamel ; 

 in two sizes, with either wall plate or pipe clamps, to hold up 

 to 50 feet or to 100 feet of unlined linen hose. Protected by 

 United States patent No. 699,656. issued May 13, 1902. [Cliff 

 & Guibert Co., No. 198 West Broadway, New York.J 



■ "THE LITTLE MOTHER" BABY COMFORTER. 

 In the construction of this device a leading feature has the 

 securing of the rubber nipple to the holder and handle in such 



manner as to 

 make their ac- 

 cidental sep- 

 aration impos- 

 sible. At the 

 same time has 

 been kept in 

 mind the con- 

 struction of an 



article simple, durable, and inexpensive. The cut shows a sec- 

 tional view, through the nipple, holder, and handle, illustrating 

 the method of securing the parts together. The handle is 

 screwed to the disk which serves as a guard, the nipple being 

 held firmly in place by reason of its bead-edged neck becom- 

 ing engaged between the other two parts of the device. An 

 important sanitary advantage is that the edges of the nipple 

 are protected against gathering bacteria. If desired, instead 

 of a handle in the form shown in the cut, the guard may be 

 provided with a pendant ring. This device is the subject of 

 United States patent No. 699,757 — May 13, ^902. [VVhitall 

 Tatum Co., Nos. 46-48 Barclay street, New York ] 



THE SAND BLAST IN RUBBER WORK. 



THERE are a great many places in the rubber factory where 

 the sand blast machine has made itself useful ; for ex- 

 ample, in the cleaning of couch and squeeze rolls, so that the 

 rubber will adhere to them, there is nothing better than the 

 sand blast, or that is half so quick and economical. The great- 

 est use of the blast, however, in connection with the rubber 

 manufacture, will be in mold cleaning. It is well known that 



in all mold work, some preparation is needful to keep the rub- 

 ber from adhering to the mold during vulcanization. The 

 usual dry ingredient employed is French talc, and its wet alter- 

 native is soft soap. After a time, the use of either of these 

 produces a fine smooth scale on the interior of the mold, and 

 not only modifies the size of the pro- 

 duct obtained from it, but, by chipping, 

 damages the goods. When a mold gets 

 too much filled up to produce good 

 goods, it is cleaned, usually by cutting 

 away the scale and finishing ofi with 

 emery paper. This, of course, refers 

 only to iron or steel molds, as soft 

 metal molds may be melted up, and the 

 scale passes oflf as dross. A great many 

 plans have been suggested to do away 

 with the old fashioned method of scale 

 removal, most of them taking the form 

 of liquids to dissolve the sulphur, talc, 

 or soap scale, and not aflfect the metal, 

 but, as a matter of fact, none of them 

 has proved successful, and it is just 

 here that the sand blast comes in. The 

 machine as a rule is used in a room 

 about twelve feet square fitted with a 

 system of air exhausts which help to 

 keep the atmosphere clear. Where the 

 men work in the room, it is necessary 

 for them to wear helmets. For ordinary mold cleaning, how- 

 ever, the work can be done on a canopied table, fitted with an 

 exhaust underneath, which carries the sand away and saves 

 it. For coarse work the sand should be hard and tough, not 

 too fine, thoroughly dry, and cool. A very fine silica is good 

 for molds. The machine shown in the accompanying illustra- 

 tion, of the Paxson- Warren type, is durable and economical. It 

 has no inside hopper; every part is accessible; and all pieces 

 liable to wear can be replaced. The top is cone shaped, and 

 has a valve opening for sand in the center, while the discharge 

 is regulated by another valve at the bottom. In the use, the 

 sand and air are conducted through a length of hose to the 

 nozzle, and against the piece that is to be cleaned. About 12 

 feet of hose is usual, but any length up to 50 feet is practical. 

 The usual equipment with this machine is one helmet, one noz- 

 zle, twelve tips, and twelve feet of hose. [The J. W. Paxson 

 Co., No. 102 1 North Delaware avenue, Philadelphia.] 



RIGBY" WATERPROOFING PROCESS. 



THE Rhode Island Worsted Co. (Indian Orchard, Massachu- 

 setts), manufacturers of piece-dyed and fancy worsteds, 

 are mentioned as making use of the Rigby process in the manu- 

 facture of waterproof goods. A letter from the company to The 

 India Rubber World states: " We are making cravenettes ; 

 also using it on piece-dyes, black and blue, for ladies' and gen- 

 tlemen's wear." The United States Treasury department has 

 allowed, on the exportation of such goods as are referred to, a 

 drawback equal in amount to 99 per cent, of the duty paid on 

 any imported cloths used. The India Ruuber World of 

 April I, 1898 (page 195), mentioned this as a secret process dis- 

 covered by an Englishman, John S. Rigby, but not patented^ 

 and sold by him to Canadian parties, and in turn to the Rigby 

 Waterproofing Co., incorporated by New Yorkers under New 

 Jersey laws, with $300,000 capital. H. Shorey & Co., of Mon- 

 treal, are manufacturers of Rigby waterproof garments and 

 also of cloth waterproofed by the Rigby process. 



