Oscillator-exciting system for ultrasonic liquid nebulizer

Details Oscillator-exciting system for ultrasonic liquid nebulizer Oscillator-exciting system for ultrasonic liquid nebulizer

1975-05-29

1976-11-02

Michell, Robert W.

Surgery

Truss

Pad

128DIG2, 239102, 310 81, 331160, A61H 100, A61M 1500

Patent

active

039890422

ABSTRACT:
In an oscillator-exciting system for a ultrasonic liquid nebulizer, a piezo-oscillator element for nebulizing the liquid is electrically connected to a self-exciting oscillating circuit as a constituent element thereof and the circuit is oscillated at that frequency at which the electric impedance of the piezo-oscillator element is inductive. A protective transistor may be connected to a current-bias resistance of the oscillating circuit, which protective transistor may be cut off by a reed switch sensing the exhaustion of the liquid being nebulized and/or by an overcurrent sensing circuit, for ceasing the oscillation in case of liquid exhaustion and/or overcurrent.

REFERENCES:
patent: 3490697 (1970-01-01), Best, Jr.
patent: 3593712 (1971-07-01), Weaver
patent: 3809977 (1974-05-01), Balamuth et al.
patent: 3828773 (1974-08-01), Buch
patent: 3871395 (1975-03-01), Murray

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