. Railroad digest . e only amounted toa small fraction of a second, so small indeed that it had to bemeasured by electrical recording apparatus, the combination ofstop watch, gauge and observers eye not being quick enoughto determine the differences. The advantage of the disk test formeasuring the range of service application and the range ofemergency application was well illustrated. No. 6 test was asurprise and disappointment to all those who had witnessed thefine performance of the valve in all other respects. The in-ventors of the valve feel confident they can reproportion theparts so that
. Railroad digest . e only amounted toa small fraction of a second, so small indeed that it had to bemeasured by electrical recording apparatus, the combination ofstop watch, gauge and observers eye not being quick enoughto determine the differences. The advantage of the disk test formeasuring the range of service application and the range ofemergency application was well illustrated. No. 6 test was asurprise and disappointment to all those who had witnessed thefine performance of the valve in all other respects. The in-ventors of the valve feel confident they can reproportion theparts so that emergency action will follow the service actionwithin the 3-64 limit called for in test No. 6. When this isaccomplished it is believed that the Hibbard valve will easilymeet all the requirements of the Associations code. The com-mittee feels that it cannot commend too highly the action of theowners of the Hibbard valve in submitting their device for criti-cism and test before putting them on the freight cars of thi. THE HIBBARD TRIPLE VALVE. A summary of the tests is as follows: Test No. 1.—To determine power of service brake, meets re-quirements. Test No. 2.—Development of power and measure-ment of time in emergency service, fails in the 55 lbs. pressurerequirement in SVa seconds by .196 of a second in the firstseries of three tests, and by .076 of a second in the second seriesof three tests. Test No. 3.—Jumping test, meets requirementsas far as jumping is concerned, but fails in the time requirementon the fiftieth car. Test No. 4.— (a) Graduating test, meetsrequirement. (6) Graduating test, meets requirement. TestNo. 5.—Disk test, service, meets requirement. Test No. 6.—Disk test, emergency, fails in requirement. Test No. test, service, meets requirement. Test No. 8.—Releasetest, meets requirement. Test No. 9.—Time charging reservoir,failed in requirement. Test No. 10.—Service followed by quickaction, meets requirement as far as quick action is co
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
