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Title: Fundamentals Of Positive Displacement Diaphragm Meters
Author: Brian Stack
Source: 1994 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1994
Abstract: During the eariy 1800s when gas was being manufactured from coal the need arose to be abUe to accurately measure gas usage and therefore charge the customer for only the actual amount of gas that they had consumed. This was originally completed through the use of a wet type drum meter invented by Samuel Clegg in 1815. The wet type was improved in 1825 by John Malam and Samuel Crosely, however due to problems such as freezing, large size, and high costs an alternative was needed. In 1843 the alternative was developed by an Englishman by the name of Thomas Glover. Glovers invention , the dry displacement diaphragm meter, has since become the industry preference for measuring gas usage. The original Glover meter consisted of 2 diaphragms and a sliding valve with linkages connecting the two.

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