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Title: Automatic Chart Changers
Author: Richard L. Howard
Source: 1973 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1973
Abstract: Automatic chart changers are designed to be utilized in recording instruments employing a circular chart. The need for such a device was likely realized the first time it became necessary to change a chart under adverse conditions. Since then many attempts have been made but it wasnt until January 1959, that the first commercial installation of an automatic chart changing device was completed. It was manufactured by Mullins Manufacturing Company (since incorporated) and installed at a city gate M & R station near Dallas, Texas. Since the early sixties several approaches toward automatic chart changing have been attempted, some of which were patented and marketed. Those the author is familiar with besides the Mullins Dial-0-Graph are the Maeder-Squier Automatic Meterman, the Barton Chart Changer and The Tejas Chart Changer. Of these, the Tejas and Mullins are currently available.

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