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Title: Installation, Operation And Maintenance Of Automatic Chart Changers
Author: Bruce J. Caldwell
Source: 1975 International School of Hydrocarbon Measurement
Year Published: 1975
Abstract: In recognition of the age average of those attending the proceedings of this school, and the high percentage representing persons both new to this school and the hydrocarbon industry, it is timely to draw some parallel between the mysteries of automatic chart changing and the world of entertainment outside the hydrocarbon industry. Once upon a time there were no juke boxes to flip our music discs. A change in tune was occasioned by manual removal of a platter from a device popularly called a Victrola, followed by manual placement of another bearing a dissimilar label. Needless to say, the mechanics of this operation ordinarily required cranking the device to wind a spring as a means of supplying power. Mr. Edisons experiments with electricity had not progressed to the extent of overcoming the cranking chore at this point in time. Later, the demands of the hepcats and jive crowd gave birth to the automatic record player or record changer. It became no longer necessary to interrupt a romantic moment to wind a spring or flip a record. This fact offers some support to the contention that necessity is the mother of invention. In similar vein it is appropriate that attention be called to another record changer, the automatic chart changer. It follows that circular charts are also records and are round, although not necessarily associated with sound or romance. Instead, we are here confronted with the cold economics of commerce. Emphasis may be placed on three key words namely, cold, economics and commerce. In light of the current value of hydrocarbon fuels and their cost, along with rising labor cost, the significance of automated chart changing outshadows the economic importance of juke box automation. This contention, however, may be subject to challenge by music-loving youngsters.

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