August 1, 1914.] 



THE INDIA RUBBER WORLD 



617 



fahric to be taken up. On the other hand, if the strain on the 

 fabric is greater than the pressure permitted by the regulator, 

 enough air will leak past the piston to permit the roll to move 

 downward, relieving the tension on the fabric. 



A DEVICE FOR THE CONVENIENT WEIGHING OF TIEES. 



The drawing shows a method used in a number of rubber 

 factories for weighing such articles as tires which are not con- 

 veniently placed upon 

 the ordinary scale plat- 

 form. From the draw- 

 ing it will be seen that 

 the device consists 

 merely of a hook made 

 from heavy wire and 

 bent in such a way that 

 it hangs from the plat- 

 form of the scale with- 

 out interfering with the 

 balance. With the de- 

 vice attached to the 

 scale it is only neces- 

 sary to hang the tire 

 on the hook and obtain 

 the total weight of the 

 hook and tire together, 

 after which the weight 

 of the hook is subtracted. In order to eliminate this trouble 

 the scale may be previously balanced with the hook so that the 

 weight of the tire is obtained directly. 



Showing How Tires C.\n' be Weighed 



ON THE OrDIN.^RV ScAI-E. 



Appar.mus for Regul.\ting the Tension in Fabrics. 



THE •■UNIVERSAL UNIT" CUSHION STAMP. 



The efficiency of a rubber stamp is considerably increased by 

 mounting the type on a flexible cushion. There are Several 

 types of cushion .stamps, but the latest design, illustrated' here- 

 with, has been introduced by The R. H. Smith Manufacturing 

 Co., of Springfield, Massachusetts. The cushions are molded 

 in the shape of hollow pyramids, open at the low-er ends and 

 connected •'• the h.-isc^ l)v thin webs. Tlu- sheet is separable at 



The patent is No. 1,100,039, granted to \Vm. C. Tyler and 

 Edward Nail, and assigned to The Goodyear Tire & Rubber 

 Co., of Akron, Ohio. 



THE "FOUR OAKS' SPRAYER. 



Among the machinery and appliances shown at the recent In- 

 ternational Rubber Exhibition in London was the "Four Oaks" 

 sprayer illustrated herewith. This ma- 

 chine is specially designed for use be- 

 tween rows of trees on plantations, 

 and may be operated with any kind of 



:"^. 



wash. The tank has a ca- 

 pacity of 12 gallons, and 

 contains an automatic agi- 

 tator, which operates when 

 the pump handle is manipu- 

 lated, to keep the ingre- 

 dients of the wash thor- 

 oughly mixed. The pump 

 is easy to work, and can be 

 instantly removed from the 

 tank by loosening three 

 thumb-screws. Fifteen feet 

 of armored hose and two 

 machine. [The "Four Oaks" 

 Spraying Machine Co., Sutton Coldfield, Birmingham, England.] 



nozzles are supplied with each 



any point and in either direction, making a cushion of any re- 

 quired size to fit any shape of die. When the units are sepa- 

 rated a finished edge is left at the base of the cushion, and 

 there is no waste of rubber. 



In the illustration, the figure on the left shows the tops of 

 two sections, while that at the right shows how the cushions 

 are hollowed out. The central figure shows the sheet of type 

 attached to the cushion, which is mounted in the usual manner 

 upon a wooden block and handle. The cushion is made in 

 sheets 10 inches square, each containing one hundred units— a 

 form very convenient for the stamp manufacturers. 



Replete with information for rubber manufacturers— Mr. 

 Pearson's "Crude Rubber and Compounding Ingredients." 



