Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1985-01-22
1986-08-05
Myracle, Jerry W.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
G01C 2500
Patent
active
046035745
ABSTRACT:
Calibration testing of a blood pressure transducer can be performed in immediate proximity to the body of the patient by including in either the transducer housing or the housing of a connector located adjacent thereto, a pair of membrane switches on opposite sides of the housing. The switches are connected in series with each other and with a shunting resistor which, when connected across one input and one output port of the transducer's circuit, will produce a predetermined pressure reading. The switches are so arranged as to require simultaneous actuation from two sides of the housing to prevent accidental actuation of the testing circuit by the patient.
REFERENCES:
patent: 2964733 (1960-12-01), Raju
patent: 3063283 (1962-11-01), Polansky
patent: 3311187 (1967-03-01), Haggard, Jr.
patent: 4499903 (1985-02-01), Furst et al.
American Hospital Supply Corporation
Myracle Jerry W.
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