316 



THE INDIA RUBBER WORLD 



[June 



190.V 



A LATHE FOR HARD RUBBER. 



THE lathe shown in the accompanying illustration is made 

 specially for hard rubber work. It has a swing of 10 

 inches and will turn stock as long as 15 inches. When the 



characterofthe 



work requires 

 it, the lathe is 

 fitted with a 

 hollow spindle 

 by means of 

 which longer 

 stock, up to % 

 inch in diame- 

 ter, can be 

 turned. By 

 using a frazing 

 tool, stock not 

 longer than 6 

 inches can be 

 turned down to 

 .,'., of an inch in 

 diameter. At- 

 tached to the 

 headstock and 

 tailstock are 

 adjustable 

 t ool-h older 

 rests. When short stock is to be worked, the tailstock can be 

 taken off and the steady rest used as a tool holder rest, thus 

 enabling the lathe to be operated rapidly and conveniently. 



On the spindle, to the left of the driving pulleys, is the 

 threading hub which engages the leader, or chasing finger, 

 attached to one end of the threading tool holder. This is so 

 made as to be easily removed from the spindle, thus making it 

 possible to cut any desired number of threads on the lathe. 



The lathe is fitted with a very accurate universal 

 chuck, which can be easily removed and the faceplate, 

 shown in illustration, can be readily attached. It is 

 driven by tight and loose pulleys, y/ z inches in diame- 

 ter by 1 ;i inch face, and, for the work it is generally 

 used, runs at about 2000 revolutions per minute. 



The lathe, as shown, stands 3 feet 6 inches high to 

 the center of the spindle, and is fitted with a hard 

 wood shelf at the back. When the lathe is used with 

 the short legs it stands 12 inches high to the center 

 of the spindle. When desired, a special bed is furn- 

 ished by means of which the lathe can be bolted to 

 the side of a bench. 



A faceplate, short and long tool rests, two tool hold- 

 ers, one threading tool holder, extra centers, neces- 

 sary wrenches, etc., are furnished with each lathe. 

 The shipping weight of the lathe is 225 pounds with 

 the long legs and 165 pounds with the short legs. 

 That the lathe is serving its purpose well is shown by 

 the fact that hundreds have been manufactured dur- 

 ing the past thirty years. They are manufactured by 

 lames Smith, Seymour, Connecticut. 



The chuck referred to above was invented by James 

 Smith in the "sixties" and is claimed to be the first 

 universal chuck invented in the United States. That 

 it answers the purpose for which it was designed is at- 

 tested by the fact that it has been manufactured con- 

 tinuously since the time it was invented, in spite of the 

 many that have appeared on the market since that time- 



RUBBER SHELLS IN ARTILLERY PRACTICE. 



AN interesting illustration of one of the many uses to which 

 rubber is adapted was recently given in Brooklyn (New 

 York) at a public exhibition in the armory of the Thirteenth 

 regiment. The occasion was the review of the regiment by 

 William Cary Sanger, assistant secretary of war of the United 

 States. A novel portion of the evening's exercises consisted of 

 artillery practice with 4 inch and 8 inch India-rubber shells. 

 The squad in charge of the 4 inch gun succeeded in hitting the 

 target almost every shot. The best shot of the performance 

 however — and indeed the best shot ever made in this kind of 

 practice — was made by the squad in charge of the 8 inch gun, 

 who hit a target consisting of a cartridge placed upright on 

 the floor. Altogether, it was a remarkable demonstration of 

 what may be accomplished by indoor artillery practice in all 

 the large armories in the country and caused much favorable 

 comment from the members of the regular army who were 

 present. 



The difficult part of the construction of shells for this work 

 was to get an article which would take the rifling of the gun 

 without being soon cut up and destroyed, or fit so tightly as to 

 destroy the progress of the shot, on account of the friction. A 

 number of experimental shells had been made previously, but 

 they all failed in this point, being wabbly and so uncertain, 

 that one shot following another would hardly ever strike in the 

 same spot. The present shells, however, are so successful, that 

 when a rifle is once aimed, the shots will continue hitting the 

 target, one after the other, thus making practice work of real 

 practical value. The rubber shells, of which a photograph is 

 here given, were made by the Voorhees Rubber Manufacturing 

 Co. (Jersey City, New Jersey) who have made a reputation as 

 manufacturers of difficult specialties. 



It may interest some of our readers to state that the father 

 of Mr. Sanger, named above, was one of the old New York firm 

 of Cary, Howard & Sanger, in which the late Richard Butler 

 was an unnamed partner, and who jobbed rubber goods. 



