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Seed Storage Temperature Signal System

During construction of the refrigerator system at the Piedmont Nursery, Pickens, S.C., the contractor installed a small buzzer on the packing shed wall to indicate when the unit was in a defrost cycle. This device warned nursery personnel in the vicinity that there was a malfunction when the buzzer sounded longer than the defrost cycle period. If, as often happened, no one responded to the buzzer, a loss of refrigeration could last several hours without discovery. This occurred several times during 1957 and 1958 when sealed type compressor units were in use.


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Author(s): Ernest W. Cooler

Publication: Tree Planters' Notes - Issue 52 (1962)