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公开(公告)号：US3552418A
公开(公告)日：1971-01-05
申请号：US3552418D
申请日：1968-09-09
Applicant: ECONOMICS LAB
Inventor： KRESS JAMES D
IPC: G05D11/13 , G05D11/035
CPC classification number: G05D11/132 , Y10T137/2531
Abstract: A disc mounted in a stream of fluid for rotation at a rate proportional to the rate of flow of the fluid and constructed to interrupt a light beam at least once per revolution to provide a series of pulses which are utilized to time an injection motor so that a material is introduced into the stream in an amount proportional to the rate of flow of the fluid in the stream.
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