August 1. 1915. 



THE INDIA RUBBER WORLD 



GUI 



In making heels, the piece of rubber waste, which has pre- 

 viouslj been cut to the approximate size and shape, is inserted — 



the ram or plunder being removed — in the ring C. The ram is 

 then placed in position on the rubber in the ring, the upper sur- 

 face of the rubber lying just below the top of the ring, and the 

 mold thus charged i- placed under a screw or other form of 

 press for giving the necessarj pressure. [S. Cooke and \Y. C. 

 Davis, : England, United States patent No. 1,140.577.] 



A NEW ENGLISH WASHER. 



This machine, for washing rubber, particularly rubber mixed 

 with bark, sand. etc.. is mounted in a trough .1 and consists of 

 an inclined grooved roller A' and one or more plain rollers C. 

 is driven by gearing and tin- rollers C either fric- 

 tionally or bj gearing. The ma- 

 terial is supplied through a hop- 

 per and forced along the rollers 

 towards the upper end by means 

 of inclined guides. The sides of 

 asing are formed with a 

 number of longitudinal projec- 

 ' and pockets E co-acting 

 with the roller B. The sides of 

 the caving are hinged and held in 

 place by adjustable struts F. 

 Parts of the apparatus may be 

 steam-jacketed. Water is admit- 

 ted near the upper end of the machine, and the sand, etc., is 

 discharged it the lower end into a tray ami thence into the 

 trough ..', which has strainers to retain the rubber. | \\ (1. Gass, 

 British patent No. 1,200, 1914] 



The same inventor has patented a washing, macerating or 

 creping machine with a hinged roller that can be readily re- 

 moved from the bearings. [British patent No. 1.199, 1914.] 



C 



-A— 



-*i 



HYDRAULIC SOLID TIRE PRESS. 



The ordinary pre-- used in applying solid tires to heavy rims 

 or truck wheel- i< n< t designed to facilitate the handling of 



heavy weights. A German in- 

 vention, however, provides a press 

 with a divided head, and an over- 

 head track with a traveling hoist 

 capable of loading and unloading 

 heavy wheels or rims directly on 

 the platen of the press. 



Referring to the illustration, the 

 forged steel base A supports the 

 hydraulic cylinder and ram /.' 

 upon which is mounted the platen 

 C. The head D is made in two 

 parts which are bolted to the 

 crosshead with sufficient space 

 1 iet ween to accommodate the 

 overhead track and chain hoist 

 F. [Continental Caoutchouc & 

 Gutta Percha Co., Hanover. Ger- 

 man patent No. 628,518.] 



OTHER DEVICES 



Machine fob Testing Hardness. — This invention is a device 

 by which the hardness of material is measured by the penetration 

 of a hard ball under an adjustable load and the result indicated 

 on a vernier. The operation is as follows : The piece to be tested 

 is placed on the anvil and by manipulation of the levers the ball 

 is brought into contact with the surface to be tested. At this 

 there is no load on the counter-balanced lever. Two rods 

 connected with the indicating mechanism are adjusted to just 

 touch the test piece when the index reads zero. Through the 

 system of counterbalanced levers, weight is applied, causing the 



ball to sink into the test piece. The hand crank, sprocket wheels 



hain are used to raise and lower the weights. The di 

 of penetration is directly proportional to the hardness of the ma- 

 terial and the reading on the scale is made to indicate thi 

 proper calibration, in terms of the units desired. [Tinius Olsen. 

 United State- patent No. 1.141.881.] 



Barber's Vn.cAM/.KK Door. — The door is provided with 

 series of circumferentially spaced lugs extending outwardly. The 

 shell has two series of spaced lugs extending inwardly, the 

 spacing being arranged to permit the lugs of the door to pass 

 through. By a partial rotation of the door the various lugs 

 are made to interlock, thereby effectively sealing the . 

 [B. R. Harder. United States patent No. 1,144,683.] 



Braiding Machine. — Lundgren employs in this invention a 

 fixed annular trackway for the independent carriers, lie also 

 divides the actuating mechanism for the set of separate carriers 

 for one set of thread-supplying devices, by the path tin 

 which the threads of the other set of thread supplying d< 

 are moved, and support- part of the mechanism on one side and 

 the other part on the other side of the path. [J. Lundgren. as- 

 signor to the Carlson-Wenstrom Manufacturing Co., I 

 States patent No. 1,144,716.] 



Car Vulcanizer. — It consists of a clamp and two plates be- 

 tween which the part to be vulcanized is held. On the upper 

 plate is placed a block of slow burning material of such 

 that when ignited it will generate sufficient heat to completely 

 vulcanize the repair. The following slow burning compositions 

 arc suggested: (1) potassium nitrate 25 gr., gum 20 gr.. potas- 

 sium chlorate 5 gr.. charcoal 8 gr., cascarilla 10 gr.. ground 

 glass 9 gr.. plaster of paris 10 gr.. wood dust 8 gr.. Venetian 

 red 10 gr. ; (2) wood dust 3 gr., potassium nitrate 30 gr., traga- 

 canth 5 gr.. gum 5 gr. ; (3) charcoal 224 gr.. coarse prunella 

 256 gr., chlorate of potash 32 gr., infusorial earth 160 gr.. gum 

 120 gr.. water 5 drams. [\V. H. Miles, British patent N'o. 

 4,313—1914.] 



Repair Vulcanizer. — The heating and pressure surfa> 

 formed by a plaster cast of the part to be repaired. Deep cut- 

 are temporarily filled with soap so that they are not molded 

 The plaster cast is carried by a support that is fastened to a 

 steam chamber or other heating device. [H. C. Reading. British 

 patent No. 4,283—1914.] 



Collapsible Core. — The adjacent ends of the four se. I 

 have slotted flanges and are held in alignment by flange plates 

 which are slotted to receive the clamping bolts. In assembling 

 the core three sections are placed together and the bolts moved 

 in locking position and fastened. The key section is then aligned 

 and the bolts slid in place and fastened. In removing the core 

 from the casing the bolts are loosened and slid out of the locking 

 position, and the key section removed. The other secMons are 

 then easily removed from the casing. [P. E. Welton, United 

 States patent No. 1,144,671.] 



Latex Coagulated Apparatus. — A grooved, corrugated, per- 

 forated or plain horizontal drum is mounted in a smoke chamber 

 and is revolved by a hand crank in a trough containing latex. 

 The smoke is led from a furnace to the smoke chamber by a 

 pipe which terminates in the trough at a point near the surface 

 of the latex. [R. S. Agar. Ceylon. British patent N'o. 6,215, 

 1914.] 





MACHINE FOR PREPARING VULCANIZED RUBBER FOR ANALYSIS. 



R. Wheatley and B. D. Porritt have perfected a simple- 

 device for the above purpose by which the essential require- 

 ments of correct sampling are met. namely, accurate rep- 

 resentation, uniformity and suitability oi condition for 

 analytic treatment and speed of sampling. 



The machine has a bed-plate 7 x 14 inches on which a pair 

 of pedestals is mounted to carry the bar supporting the ob- 

 jects for sampling, and the tray to receive the sample, also 



