Scanning flow indicator for rotameters

Details Scanning flow indicator for rotameters Scanning flow indicator for rotameters

1978-04-25

1980-04-29

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73209, 250231R, G01N 2126

Patent

active

042008069

ABSTRACT:
A flow indicating attachment for a transparent rotameter column containing a visible float movable in accordance with the rate of fluid flow through the column consists of a reciprocating scanner moving parallel to the column in a flow rate range including the range of float movement and coupled to a potentiometer forming a synchronous analog scanning signal which is furnished to a recorder. The scanner has a photoelectric float-sensing assembly including a photocell connected in the analog scanning signal circuit. When the sensing assembly is shaded by the rotameter float, it produces an abrupt dip in the recorded analog scanning signal, thus providing a recorded indication of the float's position in the range covered by the track of the reciprocating scanner.

REFERENCES:
patent: 3388258 (1968-06-01), Grant
patent: 3404568 (1968-10-01), Humber et al.
patent: 3416371 (1968-12-01), Locke
patent: 3522731 (1970-08-01), Wilson
patent: 3623365 (1971-11-01), Lowell et al.
patent: 3699560 (1972-10-01), Meunier et al.
patent: 4003255 (1977-01-01), Spencer
Brochure of Modulated Signal Output Systems, Meter Equipment Manufacturing Inc., 8603 Chardon Rd., Kirtland, Ohio.

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