Flow rate monitor and totalizer with count display

Details Flow rate monitor and totalizer with count display Flow rate monitor and totalizer with count display

1980-04-18

1982-03-23

Caldwell, Sr., John W.

Registers

Platform operated

Platform actuated traffic counters

128214E, 222 59, 235 92V, 340608, 340609, G06M 302, G08B 2100, A16M 516

Patent

active

043214614

ABSTRACT:
A flow rate monitor of solid particles or liquid drops and totalizing count display apparatus including a pulsed infrared light source and receiver forming a monitoring beam of high immunity to ambient light, transversely passing through a sensing chamber. A particular application is wherein the system is applied to the drop chamber of an intravenous set having electronic circuitry for pulsing the infrared light source and pulsing the sensing period of the monitoring beam receiver and producing a drop signal for each drop and a visible light flash for each sensed drop. Circuitry responds to the drop signals for maintaining a count of the number of drops and activating a visible numerical display indicating the drop count according to a selected numeric function, and an additional numeric display is provided adjacent the total count display indicating a selected checkpoint number. Alarm means are provided to produce visible and audible alarms signaling a No-Drop condition when an absence of drops occurs, as well as an alarm when a preselected count is reached. Alarm means are also provided to yield an audible alarm when a low battery voltage is reached.

REFERENCES:
patent: 3163176 (1964-12-01), Darling
patent: 3985133 (1976-10-01), Jenkins et al.
patent: 4001801 (1977-01-01), Moulet
patent: 4018362 (1977-04-01), Ubaud
patent: 4068130 (1978-01-01), Malinowski
patent: 4128756 (1978-12-01), Nagano et al.
patent: 4205238 (1980-05-01), Shim et al.
IBM Technical Disclosure Bulletin, vol. 12, No. 5, "Drop Detector" by E. Ellenwood, Oct. 1969, p. 693.

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