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THE INDIA RUBBER WORLD 



[September 1, 1915. 



position but by the juries of award, will be seen by the fact that 

 two grand prizes, two gold medals and four silver medals have 

 been bestowed upon this exhibit; one tiran.l prize going to the 

 Brazilian Ministei ol Agriculture for his generous loan of ex- 

 hibits, the second grand prize going to the government of the 

 State of Sao Paulo. A gold medal has been bestowed on Dr. 

 Dahne in recognition of his eff' >rts in assembling this exception- 

 al^ tine display. Tin- other gold medal went to the government 

 of the State of Parana, while the four silver medals went to 

 different companies in Para and Rio de Janeiro for individual 

 exhibits. 



One of the most interesting days which the exposition has 

 yet seen was on the occasion, late in July, when it was visited by 

 Colonel Roosevelt and party \s the ex President spenl ojie 

 of the most exciting winters of his life in the Brazilian jungle, he 

 was strongly attracted to the Brazilian department. He 

 particularly interested in the rubber gatherer's cabin, which Dr. 

 Dahne labeled ^Roosevelt Cabin," although it is probably con- 

 siderably more spacious and comfortable than the quarters which 

 the famous explorer enjoyed while canoeing down the "River 

 ubt." 



It has been practically decided to continue the exposition 

 another year, and Dr. Dahne expects to go to Brazil in Octobi r 



Col. Roosevelt and Dr. Dahne (at the Extreme Left) in 

 Front of the Roosevelt Cabix. 



with the hope of bringing back even a larger and more complete 



collection of Brazilian products than he now has. He earnestly 



hopes that the American manufacturers of rubber goods will also 



ted and that his exhibit may include not only 



• crude rubber but a variety of manufactured goods, 

 lie would be glad to have any manufacturer interested in the 



immunicate with him, in care of the exposition. 



A GRAPHIC EFFICIENCY INSTRUMENT. 



IT is one thing to establish a standard of efficiency in the 

 * operation of a calender, mixer, or a press vulcanizer, but it is 

 quite another to maintain standards in all of the machines used 

 in the manufacture of any line of rubber goods. The speed and 

 temperature of the mixer and calender rolls should not exceed 

 certain limitations. So too in vulcanization, the temperature 

 and duration of a cure should always be the same for like gi 

 Indeed in most 

 of the other 

 operations in 

 rubber manu- 

 facture a uni- 

 form product 

 is largely de- 

 pendent on the 

 exact operation 

 of the machin- 

 ery. In estab- 

 lishing a s> stem 

 of efficiency the 

 first thing is to 

 be able to meas- 

 ure each ma- 

 chine's output. 



The Esterline 

 meter is an in- 

 strument which 

 makes a con- 

 tinuous record 

 of the perform- 

 ance of washer, 

 mixer. calen- 

 der or vulcan- 

 izer. Any vary- 

 ing quantity, 

 whether it be 

 speed, tempera- 

 ture, pressure, 

 feet per min- 

 ute, miles per 



hour, volts, amperes, kilowatts or horse-power, is registered. The 

 record is written in ink by a pen, on a chart propelled at a uni- 

 fi irm rate, and is an exact graphic representation of the 

 quantity measured. 



The illustration shows a five-pen service instrument that can 

 be used in recording the operations of rubber mills and calen- 

 ders. The solenoid controlling each pen is connected with sepa- 

 rate terminals on the instrument, and therefore each pen can 

 be controlled separately. Normally the pen will draw a straight 

 line on the paper, and at the moment of closing the contact in 

 its particular circuit, the pen will deflect about a quarter of an 

 inch to the right. It will then continue to draw another line 

 parallel to the zero line until the contact is broken, and if the 

 contact is a fairly quick make and brake the pen will draw a 

 straight line at right angles to the zero line. 



The instrument can be located at any distance from the ma- 

 chine under observation. Two wires are carried from the ma- 

 chine to the instrument and a simple contact arranged on the 

 machine closes the circuit at the completion of each revolution, 

 or completion of an operation. [The Esterline Co.. Indianapolis. 

 Indiana.] 



A new tire and tube vulcanizer has been put on the market 

 which can be operated by the current supplied by the six-volt 

 lighting, starting and ignition system now a part of the standard 

 equipment of many automobiles. A thermostat regulates the 

 temperature for vulcanization. [Corbett & De Coursey Co.] 



