Recorders – Plural-function recorder – distinguishable recordings – Plural markers and single record receiver
Patent
1978-07-28
1980-01-15
Hayes, Monroe H.
Recorders
Plural-function recorder, distinguishable recordings
Plural markers and single record receiver
346 73, 346114, G01D 928, G01D 936
Patent
active
041841662
ABSTRACT:
Apparatus for recording and displaying a graphic representation of the operating performance of a railroad locomotive by monitoring the response of its engine to a throttle control setting. The apparatus includes a chart paper recording device driven in relation to time and a marking mechanism actuated by a governor and referenced to its balance position at normal operation of the locomotive engine. The marking mechanism includes a pair of fixed styli and a movable stylus for producing a graph on the chart paper. The pair of fixed styli produce a pair of spaced-apart parallel datum traces on the chart paper wherein the area therebetween represents the normal governor balance position for a specified throttle setting. The movable stylus actuated by the governor produces a single trace on the chart paper relative to the parallel datum traces and represents the movement of the governor as it seeks to maintain its normal balance position.
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patent: 2577950 (1951-12-01), Clark
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patent: 3673608 (1972-06-01), Voorman
patent: 3872479 (1975-03-01), Ramsey
Aeroquip Corporation
Hayes Monroe H.
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