332 



THE INDIA RUBBER WORLD 



[March 1, 1917. 



pansion of the water during vulcanization. [Nelson W. Mc- 

 Leod, St. Louis, Missouri, assignor to American Motors Tire 

 Co., Detroit, Michigan. United States patent No. 1,213,224.] 



IMPROVED HOSE WRAPPI1?G MACHrUE. 



According to the customary practice in wrapping garden hose 

 prior to curing, the movable roller is lifted by the increasing 

 diameter of the wrapped hose and mandrel. This often results 

 in the exterior of the 

 hose being permanently 

 marked in an objection- 

 able manner when the 

 hose is cured. 



.Referring to the 

 drawing, which is an 

 end elevation of the im- 

 proved machine, A is 

 the pole and hose sup- 

 ported by rollers B and 

 C. The cloth wrapper 

 D is placed upon the 

 front roller B, and 

 water under pressure is 

 admitted to the three 

 cylinders, only one of 

 which is shown at F, 

 thereby lowering the roller G into contact with the uncured 

 hose The cam H is then brought in contact with the wedge 

 block / which maintains the roller G in a permanent position. 

 The wrapper is thus wound on the hose between three rollers 

 that are relatively stationary and as the diameter of the wrap- 

 ping increases the hose is compressed on the pole and retained 

 in this condition during vulcanization. Thus a more sohd and 

 compact hose body is produced and one free from all exterior 

 markings or imperfections. [William P. McGeouch, Arlington, 

 Massachusetts, assignor to Boston Woven Hose & Rubber Co., 

 Cambridge, Massachusetts. United States patent No. 1,213,665.] 



THE GRIFFITH MECHANICAL STITCHER. 



In this machine the operation of stitching or shaping the 

 fabric down around the sides of the core is mechanically and 

 automatically performed in a smooth and even manner. 



The drawing shows a 

 side elevation of the 

 machine and the base 

 A, that supports the 

 driving mechanism. B 

 is a turret that re- 

 volves in a vertical 

 plane on opposite sides 

 of which are bolted four 

 co-acting pairs of stitch- 

 ing tools C. As each 

 successive pair of tools 

 comes into operative 

 position on each side of 

 the core D, it shapes or stitches the fabric further around 

 the core, a revolution of the turret completing the stitching of 

 one fabric ply. 



After a certain number of plies have been laid on the core, 

 bead ring applying rolls E are brought into position and the 

 bead rings are placed by being fed between the rolls and the 

 revolving core. When the fabric plies are to be trimmed the 

 device F is positioned and the cutting effected by the rolling 

 action of the cutters, the requisite pressure being obtained by 

 spring adjustment. The machine thus described is adapted to 

 stitch the fabric plies on the core and under the bead rings, to 

 apply the latter and stitch other plies down to the bead rings. 

 Before the trimming is done the outer layers are stitched around 



the bead rings by a pair of disks carried by arms G, and 

 operated by treadle H. [Richard Griffith, assignor to the Miller 

 Rubber Co. — both of .^kron, Ohio. United States patent No. 

 1,'212,207.] 



SELF-CONTAINED INTEENAL PRESSURE TIRE CORE. 



In curing tires when internal pressure is applied from a gen- 

 eral source the necessary pipes and couplings and the possibility 

 of leakage are features more or less objectionable. In this in- 

 vention the gas or vapor under 

 pressure is confined within the 

 core until liberated by the action 

 of a fusible plug. 



The core is formed in three 

 hollow sections A, B and C. 

 Sections A and B are similarly 

 constructed and the description 

 of the former therefore will ap- 

 ply to the latter. The hollow 

 chamber D is provided with an 

 inlet valve E through which air or gas under pressure is forced; 

 moreover, water may be introduced. The thermostatic valve, F, 

 comprises a disk that is fused by the vulcanizing heat, liberating 

 the compressed air or vaporized water which expands the casing 

 forcibly within the mold. [Henry Z. Cobb, Winchester, Massa- 

 chusetts, assignor to United States Rubber Co., New Brunswick, 

 New Jersey. United States patent No. 1,211,918.] 



TIRE CORE WITH NON-METALLIC ANNULAR PADS. 



The object in this device is to provide mechanical means 

 whereby the fabric of the tire is stitched or expanded in the vul- 

 canizing mold. Tlie ring core A is provided 

 with two lateral annular rings or non-metal- 

 lic pads B and the fabric plies C are laid on 

 the core, the beads applied and the casing 

 finished in the usual manner. Before cur- 

 ing, the pads are removed and the casing 

 is placed in the mold, annular parts of which 

 engage the head flanges, forcing them in 

 contact with the core proper. This move- 

 ment stretches the casing equally from each 

 side wall to the center of the tread, in which condition the 

 casing is vulcanized. [Burgess Darrow, assignor to the Good- 

 year Tire & Rubber Co. — Both of Akron, Ohio. United States 

 patent No. 1,212,457.] 



GRAYS VULCANIZING PRESS. 



In a press for vulcanizing molds, pressure is produced by the 

 weight of the upper platen, either by itself or with dead weight 

 placed thereon, the mechanism for raising and lowering being 



incapable of producing any 

 downward thrust. In the 

 form shown, the upper 

 platen is moved by a motor 

 A through screw-and-nut 

 gear B, B, the nuts which 

 fit loosely in the steam 

 heated platen C being pro- 

 vided with flanges D. The 

 motor stop-gear consists of 

 a projection E on the platen which trips the lever G. Instead 

 of nuts, chains or other flexible means may be employed for 

 raising and lowering the plate. [Christian H. Gray, India 

 Rubber, Gutta Percha & Telegraph Works Co., Silvertown, Essex, 

 England. British patent No. 102,272.] 



