Carrier Corporation

Fredrick R Eplett

Wayne R Reedy

Mario F Briccetti

A method and apparatus for recording and translating data using sequential spacing of data points on a recording medium. Electrical pulses are generated in response to the quantitative level of a series of events to be monitored. These pulses are then applied sequentially from a base reference point to the recording medium. The pulses are applied so that the distance between pulses is indicative of the quantitative level of each monitored event. This method is particularly useful in field instrumentation for monitoring equipment performance, process variables, weather conditions and any other variable events or conditions. Any number of events may be periodically sequentially applied to the medium over a long period of time. The recording medium can then be played back at high speed to translate the information obtained.

Time sequenced multiplexing method of recording and translating data

A control system for monitoring frost accumulation on the coil of a heat pump. An operational parameter of the heat pump compressor responsive to frost accumulation, such as compressor current, is compared to a reference level developed during a non-frost condition of the coil to initiate and terminate coil defrosting in response to a predetermined variation between the operational and reference parameter levels.

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Liverpool, NY, United States of America

Fredrick R Eplett