Measuring and testing – Volume or rate of flow – Using rotating member with particular electrical output or...
Patent
1981-04-23
1983-06-28
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
Using rotating member with particular electrical output or...
7386187, 250239, G01F 1075, G01F 1506
Patent
active
043899021
ABSTRACT:
In a flow rate transducer of the type arranged to detect the rotational speed of a blade wheel by transmitting a light beam from one side thereof to the other, a printed circuit board for carrying thereon a light-emitting element and a light-receiving element is provided. The light-emitting element and the light-receiving element are received in recessed portions of a casing made of a transparent material, where all parts including the printed circuit board contained in the casing are fixedly supported by a synthetic resin filling. The optical axes of the light-emitting element and the light-receiving element can be readily adjusted to align before assembled in the casing. The size and shape of the recessed portions may be arranged to correspond to the size and shape of the corresponding light-emitting element and the light-receiving element so that optical axes alignment can be automatically performed when fitted therein.
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Holdaway et al.-IBM Technical Disclosure Bulletin, vol. 17, No. 11, Apr. 1975, p. 3200.
Higo Nobumasa
Kataoka Masami
Nippondenso Co. Ltd.
Ruehl Charles A.
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