660 



THE INDIA RUBBER WORLD 



[Si PTEMBER 1, 1915. 



NEW COMB CUTTING MACHINE. 



This is a new German comb cutting machine that operates at 

 the same time a set of fine and a set of coarse cutting saws and 

 automaticall) causes one set of saws to take up the cutting work 



where the other set has left 



machine is composed 



of two side frames 



.' between which a 



vertically movable 



frame 3 is mounted 



and bears two su- 



"*. . perimposed shafts 



I, f' on which 



saws are keyed. 



' The lower shaft 



... s fine saws j', while 

 coarse saws 5 are keyed 

 to the upper shaft. Both 

 shafts are driven from 

 intermediate shaft 6, 

 which is belted to shaft 

 /. The frame that 

 hears the saw shafts 

 slides vertically in the 

 guides of the frames 2 

 of the machine and is 

 raised and lowered by 

 the rack 6. When this 

 frame is in its highest 

 pi isitii >n the coarse saws 

 5 are in working position opposite the piece to be cut. [German 

 patent No. 626,519.] 



APPARATUS FOR TESTING- IMPERMEABILITY OF FABRICS. 



The device illustrated herewith is for testing the non-per- 

 meability to water of textile fabrics, especiallj of cloth intended 

 for military uniforms. 



It consists of a glass cylinder ./. open at both ends, graduated 

 in depth in centimeters, with a 

 hanged brass collar, to which the 

 sample of cloth B to be tested is 

 secured by a brass ring C", and holts 

 D. A tripod E with a stem pivoted 

 at F, and an insulating portion G, 

 carries a brass disc // upon which 

 is laid a circular piece of thin paper 

 /, which has been soaked in a so- 

 lution of potassium sulphate, dried 

 Dand waxed for a width of 1 centi- 

 meter (.3937 inch) round the 

 perimeter. L'pon the paper a disc 

 of very thin wire gauze .'. of plati- 

 num or gilt copper, is placed, and 

 // and ./ are connected to the poles 

 of a battery with a relay K in cir- 

 cuit, which, when the circuit is closed, actuates the style of a 

 ling chronograph, immediately afterwards breaking the cir- 

 cuit and ringing a hell. 



In testing a fabric proofed with rubber, th. disc U is placed 

 directly on /; if rubber is not used, a space of 5 millimeters 

 inch) is left between B and /. Distilled water is poured 

 into the \c-scl A up to a known depth, the electric circuit is 

 closed and the chronograph is started. When— if at all — the 

 water penetrates the fabric, it moistens the paper and completes 

 the circuit, actuating the relay. If artificial rain is to be used 

 for th. test, . I is turned upsi i on the table, the top of 



which is s,. t ,„, a s ] p e by means of the joint F, and a jet of 



water from a capillary orifice is allowed to fall from a known 

 height upon the cloth. Penetration is announced automatically, 

 as above described. Thus, it is claimed, the water-proof quali- 

 ties of cloth can he measured under standardized conditions 



Another instrument for measuring impermeability of cloth was 

 described in Tut. India Rubber World of June 1, 1915. Briefly, 

 this coiisi-ts of a copper cylindrical box to which a measuring 

 glass tube and a rubber bulb are attached. The box and bulb 

 are tilled with water and the cloth to he tested is fastened to the 

 top of the box. By pressing the bulb the height of water in the 

 glass tube is increased and the water forced through the cloth. 

 The height of the water column measures the impermeability of 

 the fabric. 



RUBBER SOLE PRESS. 



This German device holds the sole firmly in contact with the 

 boot, while the cement dries. 

 The frame of the press a supports the elastic bed b on which 



the soles of the boot 

 rests. One end of the 

 bed is attached to the 

 frame and the other to 

 a sliding frame f which 

 is adjusted by a screw 

 e and wing nut </. 

 Clamping screws c hold 

 the sides of the bed in 

 position The clamp- 

 ing pad h. operated bj 

 a screw g, and adjustable along the guide bar )i. holds the boot 

 and sole firmly in place. [Continental Caoutchouc & Gutta 

 Percha Co., Hanover. British patent No. 6216-1914.] 



RUBBER CEMENT APPLYING MACHINE. 



In the manufacture of leather boots and shoes the edges of the 

 soles, particularly at the shank portion, are skived. This results 

 in a sole that is not uniform in thickness and therefore is im- 

 properly coated when run through a cementing machine of the 

 ordinary type. Julian's machine overcomes this difficulty, how- 



ver, by employ- 

 - a lower roller 

 of novel form. 

 This is made up of 

 circular sections, 

 movable vertical- 

 ly by springs oi 

 sufficient strength 

 to force the thin- 

 ner portions oi 

 the sole against 

 the upper cement 

 roller so that all 

 portions of the 

 sole approximate - 

 ly lie in the same 

 plane, insuring an 

 even coating of 

 ■ Hunt in espi c- 

 tiv( of variations 

 in thickness 



Referring to the drawing, .1 is the base of the machine and B 

 the standard that supports the belt-driven shaft t' upon which 

 is fastened the cement-applying roller. Above this roller is the 

 cement tank D provided with a nozzle and spreader that de* 

 liver the cement evenly to the roller E. Surplus cement is 

 controlled by a flexible scraper located opposite the spreader 

 and in contact with the cement roller. 



