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Description: The form of a weir for which the flow is proportional to the head was discovered by Rettger (1), and such weirs have been used with water stage recorders to measure the discharge from tile drains (2). A drainage investigation may re quire the use of many flow-measuring stations. When proportional weirs are used, the machining of the curved surfaces becomes a problem. Hand filing is tedious and expensive, and does not lead to great accuracy. There are obvious advantages in machining the weirs so that they are all identical. Accordingly, a method was developed for handling the job in an ordinary milling machine. The extension of this procedure to the milling of plate cams for flat or roller followers is practical and easy.

Keywords: proportional weirs by curve milling
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Citation: Collins, S. H. and F. R. Hore 1963. PROPORTIONAL WEIRS BY CURVE MILLING. Canadian Agricultural Engineering 5(1):19-20.
Volume: 5
Issue: 1
Pages 19 - 20
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Date: 1963
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Coverage: Canada
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