200 



THE INDIA RUBBER WORLD 



[January 1, 1915. 



lapsible tire core G, driven by the motor H. There are two of' 

 these cores, G and /, mounted on a frame which slides on rails /, 

 When the desired thickness is built up, the strip is severed and 

 the other core is brought in line with the calender. The covered 

 core is then removed and another placed to receive the strip. As 

 the covered cores are removed from the front of the calender 



Fig. 1. — Doughty's Friction C\lender for Tire Fabric, 



they are placed on other frames for applying the treads, after 

 which the tires are molded and vulcanized in the press shown 

 in Fig. 2. 



This is a hydraulic press, a three-part mold and a collapsible 

 core of eight segments. The mold consists of an upper platen A 



Fig. 2. — Doughty's Collapsible-Core Vulcanizing Press. 



and a lower platen B for the sides of the tire, and a ring C for 

 the tread, all chambered for steam. The core is made up of 

 four segments D and four segments E, the former being con- 

 nected with a plate F by toggles G, and the latter with the plate 

 H by toggles /. The plate F is raised and lowered by the ram /, 

 while H is operated by the hollow ram K. 



With the casing L in position in the tread mold C, water is ad- 

 mitted to the cylinder M to raise the ram /. This raises the plate 



F and operates the toggles G, forcing the core segments D out- 

 ward into the casing. At the same time the hydraulic pressure 

 raises the ram K and plate II, and operates the toggles /, forcing 

 ilu four segments E into the casing. The upward movement of 

 plate H releases guide rods N and allows plate O to be raised 

 against stop screws /'. This forces the parts of the mold around 

 the casing, while steam for vulcanization is 

 admitted through pipes Q, R and 6'. When 

 the cure is complete the rams are lowered, 

 which opens the mold and withdraws the core 

 segments from the tire so that it may be re- 

 iii' <\ ed from the rim. 1 I 



OTHER DEVICES. 



I hordarson's Paper Strip Cutter. — This is 

 a machine that receives the paper, or thin ma- 

 terial of a like nature, from the roll and cuts 

 it into strips which it winds compactly on reels. 

 Each cutter is circular and grooved, and has 

 a hub. The edges of the cutters are shearing 

 edges. The hubs are formed with grooved 

 rubber rings. The two gangs of cutters are 

 placed on parallel shafts with the cutting edges 

 of one bearing against the rubber surface of the 

 When the material passes between these revolv- 

 These are wound on the reels 



opposite cutter. 



ing cutters it is cut into strips. 



under tension applied to the swinging reel frame by weights. 



Cameron Cloth Slitting Machine. — This prevents distor- 

 tion of the material being cut by score cutters and a surface re- 

 wind roller which pulls with equal force on all the slit sections. 

 A web tension roller smooths out the wrinkles in the cloth be- 

 fore it is slit by the cutters, and supplementary knives extend 

 between the slit sections for cutting unsevered threads. 



Erickson's Channel Cementing Machine. — The object of 

 this invention is to control the cement feed and properly apply 

 it. The cement tank, mounted on a stand, is connected to a 

 belt driven stock worm that forces cement through a vertical 

 revolving brush. There is a vertical revolving guide adjacent 

 to the brush. This is normally held down below the brush by 

 a spring. In operation the work is brought up against the 

 bottom of the guide, lifting it and bringing the flap between it 

 and the brush which applies the cement. 



Adams Insulated Wire Winding Machine. — This machine, 

 which has been assigned to the Western Electric Co., winds 

 various sizes of wire on spools of different lengths. The spool 

 is supported on an arbor rotated by a motor. A wire guide is 

 attached to a carriage that moves on a track. A back carriage 

 also travels on a parallel track, and is moved to the right or 

 left by an endless belt. These two carriages are united by a 

 slotted lever that swings on a pivot in a horizontal plane. 

 When the back carriage moves to the right or left the front 

 carriage and guide move in the opposite direction, laying the 

 wire evenly on the revolving spool. The carriage is reversed 

 automatically by magnets on the back carriage engaging the 

 endless belt. When the winding is complete the machine stops. 



Newton's Device for Testing Air Brake Hose. — This con- 

 sists of an air valve and ports opeTating a piston that recipro- 

 cates in a short cylinder. A short piston rod passes through a 

 stuffing box in the valve body, and supports an expanding 

 clamp on its outer end. This is enclosed in a circular bushing 

 attached to the valve body which has .inner cam surfaces en- 

 gaging movable fingers of the expanding clamp. One end of 

 the hose to be tested is inserted in the clamp and air is ad- 

 mitted to the piston. This moves the clamp and test piece 

 forward, and the fingers are forced together by the cams, firmly 

 gripping the hose. At the same time air for testing is admitted 

 through a small opening in the piston head and rod. When 

 the test is completed the valve is opened and the hose is auto- 

 matically removed from the coupling. 



