August 1, 1914.] 



THE INDIA RUBBER WORLD 



621 



other scenes illustrating the subject of "Hazard" insulated 

 wires. 



I'he various appliances required for their installation and 

 ■operation are shown in detail, the set of a dozen catalogs and 

 price lists being a valualile addition to the reference libraries of 

 those interested in the subjects dealt with. 



The Firestone Tire & Rubber Co., of .Vkron, is distributing 

 a small booklet which has as its object the introduction and 

 sale of cycle tires, the production of which was started by this 

 company only a few months ago. The tires are made with 

 non-skid and corrugated treads, and tubes may be had in either 

 red or gray. The booklet also calls atten- 

 tion to repair materials and gives addresses 

 of 79 domestic and 29 foreign branches, 

 agencies and service stations maintained l)y 

 the coinpany. 



The Superior Type Co., of Chicago, man- 

 ufacturers of supplies of every nature for 

 rubber stamp manufacturers, have just issued 

 a 33-pa8c illustrated treatise on "Rubber 

 Stamp Making." The purpose of this book 

 is not only to enlighten the beginner but also 

 to assist those who though experienced are 

 not obtaining the best results, and primary 

 instructions are given, which include : De- 

 scriptions of the required equipment, with 

 illustrations of molding press, vulcanizers, 

 motor driven power saw and power drill with 

 self-centering table ; details of the necessary 

 materials — stamp rubber, sponge rubber, rul)- 

 lier dam, rubber cement, compounds, etc. ; 

 instructions in setting up the type form so as 

 to avoid waste of rubber ; equipment for and manner of making 

 molds; mold trimming and drying; vulcanizing, and mounting. 

 The book concludes with a word of friendly advice to the manu- 

 facturer to "Make the very best goods possible and then have 

 backbone enough to ask a fair price from the buying public." It 

 is an interesting book and will doubtless prove of value to stamp 

 manufacturers generally. 



The title "How to Get More Mileage out of Your Tires" has 

 been given to a catalog recently distributed in the interest 

 ■of Diamond Rubber Goods, manufactured at Akron, Ohio. This 

 ■catalog is divided into three sections, the first of which is 

 ■devoted to types of tires and styles of treads, also to tubes and 

 accessories. The second section describes the making of the 

 various styles of tires and the injuries to which a tire is liable 

 in use; while the third section gives instruction in repairs and 

 the necessary care to enable the buyer to "get the mileage he pays 

 for from the tire he buys." 



The July calendar issued by W. G. Brown & Co., of Cincinnati, 

 <lealers in crude and reclaimed rubber, has as its decorative 

 feature another of the outing scenes so popular and appropriate 

 at this season. This particular picture shows the sportsman 

 ■making "flap-jacks" over a camp fire, the materials for which the 

 guide, who stands in the background with axe in hand, has 

 evidently supplied through strenuous effort. 



Holmes Brothers, makers of rubber molds and special niachin- 

 •ery, Chicago, are distributing acceptable advertising matter in 

 the form of a l)lotter. This blotter, in addition to containing a 

 calendar for the month and setting forth the address and the 

 business of the firm, shows in colors a harvest scene in Hert- 

 fordshire. 



THE "DUPLEX" COLLAPSIBLE CORE. 



A NEW type of collapsible tire core has been developed and 

 ■'*• placed on the market by the Birmingliam Iron Foundry. 

 The core is beini.' m.-idi' ;ii ilic i-oinp.-iny's lir.'iiub factory at Akron, 

 Ohio. 



Fig. 1 in the accompanying illustrations shows the core with 

 all of its component parts, and Fig. 2 shows a section of the core 

 and the method of using the pinch-bar, which is the only tool 

 necessary, for assembling and taking the core apart. The outfit 

 consists of a cast-iron core of the usual design, with an internal 



Fig. 1.— Birmi.ngh.\.m "Duplex"' Coi.i..\psible Core. 



projecting flange. In the upper face of this flange is an annular 

 groove, the inner wall of which is slightly undercut. For re- 

 taining the core sections in position, a splilspring or expansion 

 ring is employed. The inner edge of this ring is cut at an angle 

 corresponding with the inner face of the groove, and the outer 

 edge is slightly tapered. Over this expansion ring is placed a 

 locking ring, which fits in the groove between the core flange and 



the expansion 

 ring. 



To assemble 

 the core, the sec- 

 tions are placed 

 together on a 

 table and the 

 locking rings 

 placed in position. The upper ring is tapped lightly with the 

 hammer end of the tool, forcing the locking ring into the groove 

 and drawing the sections securely together. To take the core 

 apart, all that is necessary is to insert the pinch-bar between 

 the locking ring and the core flange, to pry the ring from the 

 groove. 



Dui'LEx" Core. 



Should be on every rubber man's desk — Crude Rubber and 

 Compounding Ingredients ; Rubber Country of the .Amazon ; 

 Rubber Trade Directorv of the World. 



IHE BRISTOL COMPANY HAS A BOSTON BHAKCH. 



Tlic Bristol Co.. of Waterbury, Connecticut, has opened a 

 branch office in the Old South Building, Boston, in charge of 

 Mr. F. H. Emerson, one of its sales engineers. This year, by 

 the way, completes the first quarter century for this company, 

 and its growth has been so rapid that its floor space has 

 doubled every five years. Its success has been particularly 

 marked since Mr. William H. Bristol, the president of the 

 company, took over its management, some six years ago. 

 Over 65.000 Bristol recorders have been sold — whicli is cer- 

 tainly a notable record. 



Should be on every rubber man's desk^The Rubber Tiade 

 Directory of the World, 1912. 



