198 



THE INDIA RUBBER WORLD 



[January 1, 1917. 



New Machines and Appliances. 



/n\ 



THE SCOTT AUTOGRAPHIC TESTING MACHINE. 



THE natural advancement in tlic manufacture of textiles and 

 mechanical rubber goods has required a more thorough 

 knowledge of the materials used and of the eflfects of vari- 

 ous processes through which these materials pass in the course of 

 manufacture. Especially is this true in the manufacture of tires, as 



the success and hfe of a tire is by 

 no means determined by its initial 

 strength, but quite as much by its 

 ability to retain its strength and 

 resilcncy. 



The testing machine plays a 

 \ cry important part in determin- 

 ing the materials best suited for 

 the desired results. In fact, the 

 success that has been attained by 

 manufacturers who have used the 

 tensile strength tester intelligently 

 has led them to further efforts 

 along this line until the manufac- 

 turer of the testing machine has 

 been called upon to produce a 

 tester that will meet the most ex- 

 acting requirements. 



The accompanying cut shows 

 one of the latest models that will 

 automatically test rubber, tire 

 fabric or other materials and 

 write the result upon a standard 

 letter-head. It will make tensile, 

 elasticity, friction and other types 

 of tests in general use. 



It is mounted upon two heavy 

 iron rail frames and is designed 

 to be fastened to the wall in a 

 vertical position. It can be 

 driven by an electric motor insuring constant speed and uni- 

 form results. The draw bar, or stretching screw, is of special 

 high-carlion steel 1^-inch diameter and has a movement of 48 

 inches. It is operated by a heavy bronze nut and passes 

 through the gear box without revolving. The downward or 

 stretching stroke is made by direct gearing, allowing no chance 

 for slip or speed variation. An automatic reverse brings the 

 moving clamp back at high speed. 



The speed of stretch may be varied by a hack gear arrange- 

 ment to reduce from 20 to 2 inches per minute. This provides 

 for' "friction" tests on hose, belting packing, boot tops, etc. 



The autographic charting device works automatically and 

 may be used to chart both stretch and strength tests, and by 

 pressing a button on the side of the recorder it will produce a 

 magnified or enlarged chart of "friction" tests. All charts are 

 developed on standard letter paper held flat by two rubber 

 rollers. The line is drawn by red ink from a pen operating 

 across the sheet as the platen moves downward in ratio with 

 the movement of the stretching screw. Several tests may be 

 recorded on the same sheet and comparisons made of various 

 samples. The sheet can then be placed in a typewriter for fur- 

 ther data or filed in the usual way. 



Rubber and fabric clamps, as well as spools with cleats for 

 holding cords, etc., are furnished and are quickly interchangea- 

 ble. An elasticity measuring device is attached to the frame 

 of the machine and the length of stroke and distance between 

 clamps may be varied by adjustment collars on the vertical con- 



trol rod. When once set the machine will automatically stop 

 and reverse at the same position with every test. 



The recording head is simply but strongly built and has no 

 delicate parts to get out of order. Its accuracy may be proven 

 at any time without the use of special mechanism. The dial 

 is of white celluloid with black figures and can be easily kept 

 clean. The pointer indicates the maximum pull required to 

 break the sample and remains in this position until reset by the 

 operator. This is accomplished by means of a novel device re- 

 quiring very little effort. [Henry L. Scott & Co., Providence, 

 Rhode Island.] 



THE SQUIRES BATHING CAP MACHINE. 



That bathing caps are becoming more popular each season 

 is demonstrated by the increasing demand for them. In an 

 article on bathing cap machines that appeared in The 

 India Rubber World, April 

 1, 1916, was shown a sketch 

 of a machine for plaiting 

 and forming bathing caps. 

 The accompanying illus- 

 tration was made from a 

 recent photograph of this 

 machine, set up and ready 

 for use. The operation, 

 briefly stated, is as follows : 

 The cap body is laid on the 

 horizontal folding blades, 

 the head band placed 

 around the vertical head 

 block and the ends joined, ri^jS 

 making the band endless. 

 The head block is then 

 lowered and the foot 

 treadle depressed to lower 

 the hollow plunger "and 

 force the horizontal plat- 

 ing blades upward, thus 

 forming the plaits which 

 are at the same time at- 

 tached to the 

 head band. 

 The treadle is 

 then released, 

 allowing the 

 horizontal 



blades to resume their original position. The cap now being 

 folded over the blades of the vertical head block, a ring, to 

 which the blades are attached, is moved to the right, which folds 

 the plaits one upon the other. After attaching this outside head 

 band and trimming, the cap is then removed from the machine. 

 It is claimed that an operator of ordinary intelligence can make 

 one complete bathing cap a minute on this machine. [The 

 S. & W. Rubber Manufacturing Corporation, College Point, 

 New York.] 



THE FAWCUS FLEXIBLE COUPLING. 



The unusual strains and sudden shocks to which rubber mill 

 lines are subjected, frequently result in broken gearings, frac- 

 tured shafts and damaged bearings. For that reason a flexible 

 coupling that will absorb shocks and permit a certain amount of 

 shaft misalinement is considered a necessary part of the mill 

 room equipment. The pinion shaft of a double helical gear 

 drive should, moreover, be connected to the driving shaft by a 



