US3989042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator-exciting system for ultrasonic liquid nebulizer
Assignee: TDK Corp
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Filing: 1975-05-29
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Granted: 1976-11-02
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Expires: 1995-05-29
Abstract
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.
Inventors
- 👤 Sadao Mitsui
- 👤 Minoru Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:06
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; A; A61; A61M; A61M11/00; A61M11/005; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607; B05B17/0615; B05B17/0653; B05B17/0669; F; F24; F24F; F24F6/00; F24F6/12; Y; Y10; Y10S; Y10S261/00; Y10S261/48; Y10S261/65
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
An oscillator-exciting system for an ultrasonic liquid nebulizer comprising a vessel containing liquid, a power source providing an electrical potential, a piezo-oscillator element disposed in said vessel, and a self-oscillating electric circuit connected across said power source potential and a reference potential, said self-oscillating circuit having said piezo-oscillator element connected thereto as a constituent element thereof, said oscillating circuit being adapted to oscillate at that frequency in which the electric impedance of said piezo-oscillator element is inductive, so as to nebulize the liquid by the oscillation of the piezo-oscillator element, said self-oscillating circuit including an oscillating transistor and a current-bias resistance connected between a base of the transistor and said power source potential, a second transistor having a collector-emitter circuit connected in series with at least a part of said current-bias resistance, a float magnet floating on the top surface of said liquid, and a reed switch disposed at the bottom of said vessel and aligned with said float magnet so as to be actuated by said float magnet in response to a lowering of the liquid below a predetermined level, said reed switch being connected between a base of said second transistor and said reference potential.
Claim 2
Dependent Claim
197 words
An oscillator-exciting system for an ultrasonic liquid nebulizer comprising a vessel containing liquid, a power source providing an electrical potential, a piezo-oscillator element disposed in said vessel, and a self-oscillating electric circuit connected across said power source potential and a reference potential, said self-oscillating circuit having said piezo-oscillator element connected thereto as a constituent element thereof, said oscillating circuit being adapted to oscillate at that frequency in which the electric impedance of said piezo-oscillator element is inductive, so as to nebulize the liquid by the oscillation of the piezo-oscillator element, said self-oscillating circuit including an oscillating transistor and a current-bias resistance connected between a base of the transistor and said power source potential, a second transistor having a collector-emitter circuit connected in series with at least a part of said current-bias resistance, a float magnet floating on the top surface of said liquid, and a reed switch disposed at the bottom of said vessel and aligned with said float magnet so as to be actuated by said float magnet in response to a lowering of the liquid below a predetermined level, said reed switch being connected between a base of said second transistor and said reference potential.
Claim 3
Dependent Claim
211 words
An oscillator-exciting system for a ultrasonic liquid nebulizer, comprising a vessel containing liquid, a power source providing an electrical potential, a piezo-oscillator element disposed in said vessel, and a self-oscillating electric circuit connected across said power source potential and a reference potential, said self-oscillating circuit having said piezo-oscillator element connected thereto as a constituent element thereof, said oscillating circuit being adapted to oscillate at that frequency in which the electric impedance of said piezo-oscillator element is inductive, so as to nebulize the liquid by the oscillation of the piezo-oscillator element, said self-oscillating circuit including an oscillating transistor and a current-bias resistance connected between a base of the transistor and said power source potential, a second transistor having a collector emitter circuit connected in series with at least a part of said current-bias resistance, a controlled rectifier having an anode-cathode circuit thereof connected between a base of said second transistor and said reference potential, and a means producing a voltage proportional to the load current of said self-oscillating circuit, said controlled rectifier having a gate connected to said voltage producing means so as to receive said voltage proportional to the load current for providing a low impedance path through said anode-cathode circuit in response to said load current exceeding a predetermined limit.
Claim 4
Dependent Claim
211 words
An oscillator-exciting system for a ultrasonic liquid nebulizer, comprising a vessel containing liquid, a power source providing an electrical potential, a piezo-oscillator element disposed in said vessel, and a self-oscillating electric circuit connected across said power source potential and a reference potential, said self-oscillating circuit having said piezo-oscillator element connected thereto as a constituent element thereof, said oscillating circuit being adapted to oscillate at that frequency in which the electric impedance of said piezo-oscillator element is inductive, so as to nebulize the liquid by the oscillation of the piezo-oscillator element, said self-oscillating circuit including an oscillating transistor and a current-bias resistance connected between a base of the transistor and said power source potential, a second transistor having a collector emitter circuit connected in series with at least a part of said current-bias resistance, a controlled rectifier having an anode-cathode circuit thereof connected between a base of said second transistor and said reference potential, and a means producing a voltage proportional to the load current of said self-oscillating circuit, said controlled rectifier having a gate connected to said voltage producing means so as to receive said voltage proportional to the load current for providing a low impedance path through said anode-cathode circuit in response to said load current exceeding a predetermined limit.
Claim 5
Dependent Claim
271 words
An oscillator-exciting system for an ultrasonic liquid nebulizer, comprising a vessel containing liquid, a power source providing an electrical potential, a piezo-oscillator element disposed in said vessel, and a self-oscillating electric circuit connected across said power source potential and a reference potential, said self-oscillating circuit having said piezo-oscillator element connected thereto as a constituent element thereof, said oscillating circuit being adapted to oscillate at that frequency in which the electric impedance of said piezo-oscillator element is inductive, so as to nebulize the liquid by the oscillation of the piezo-oscillator element, said self-oscillating circuit including an oscillating transistor and a current-bias resistance connected between the base of the transistor and said power source potential, a second transistor having a collector-emitter circuit connected in series with at least a part of said current-bias resitance, a float magnet floating on the top surface of said liquid, a reed switch disposed at the bottom of said vessel in alignment with said float magnet so as to be actuated by said float magnet in response to a decrease in the liquid level below a predetermined level, said reed switch being connected between a base of said second transistor and said reference potential, a controlled rectifier having an anode-cathode circuit thereof connected between the base of said second transistor and said reference potential, and a means producing a voltage proportional to the load current of said self-oscillating circuit, said controlled rectifier having a gate connected to said means and receiving said voltage proportional to the load current for providing a low impedance path through said anode-cathode circuit in response to said load current exceeding a predetermined limit.
Claim 6
Dependent Claim
271 words
An oscillator-exciting system for an ultrasonic liquid nebulizer, comprising a vessel containing liquid, a power source providing an electrical potential, a piezo-oscillator element disposed in said vessel, and a self-oscillating electric circuit connected across said power source potential and a reference potential, said self-oscillating circuit having said piezo-oscillator element connected thereto as a constituent element thereof, said oscillating circuit being adapted to oscillate at that frequency in which the electric impedance of said piezo-oscillator element is inductive, so as to nebulize the liquid by the oscillation of the piezo-oscillator element, said self-oscillating circuit including an oscillating transistor and a current-bias resistance connected between the base of the transistor and said power source potential, a second transistor having a collector-emitter circuit connected in series with at least a part of said current-bias resitance, a float magnet floating on the top surface of said liquid, a reed switch disposed at the bottom of said vessel in alignment with said float magnet so as to be actuated by said float magnet in response to a decrease in the liquid level below a predetermined level, said reed switch being connected between a base of said second transistor and said reference potential, a controlled rectifier having an anode-cathode circuit thereof connected between the base of said second transistor and said reference potential, and a means producing a voltage proportional to the load current of said self-oscillating circuit, said controlled rectifier having a gate connected to said means and receiving said voltage proportional to the load current for providing a low impedance path through said anode-cathode circuit in response to said load current exceeding a predetermined limit.
Claim 7
Dependent Claim
210 words
An oscillator-exciting system for an ultrasonic liquid nebulizer, comprising a vessel containing liquid, a power source providing an electrical potential, a piezo-oscillator element disposed in said vessel, and a self-oscillating electric circuit connected across said power source potential and a reference potential, said self-oscillating circuit having said piezo-oscillator element connected thereto as a constituent element thereof, said oscillating circuit being adapted to oscillate at that frequency in which the electric impedance of said piezo-oscillator element is inductive, so as to nebulize the liquid by the oscillation of the piezo-oscillator element, a transformer electrically connected between said piezo-oscillator element and said oscillating circuit, said self-oscillating circuit including an oscillating transistor and a current-bias resistance connected between a base of the transistor and said power source potential, a second transistor having a collector-emitter circuit connected in series with at least a part of said current-bias resistance, a float magnet floating on the top surface of said liquid, and a reed switch disposed at the bottom of said vessel in alignment with said float magnet so as to be actuated by said float magnet in response to a lowering of the liquid level below a predetermined level said reed switch being connected betwee a base of said second transistor and said reference potential.
Claim 8
Dependent Claim
210 words
An oscillator-exciting system for an ultrasonic liquid nebulizer, comprising a vessel containing liquid, a power source providing an electrical potential, a piezo-oscillator element disposed in said vessel, and a self-oscillating electric circuit connected across said power source potential and a reference potential, said self-oscillating circuit having said piezo-oscillator element connected thereto as a constituent element thereof, said oscillating circuit being adapted to oscillate at that frequency in which the electric impedance of said piezo-oscillator element is inductive, so as to nebulize the liquid by the oscillation of the piezo-oscillator element, a transformer electrically connected between said piezo-oscillator element and said oscillating circuit, said self-oscillating circuit including an oscillating transistor and a current-bias resistance connected between a base of the transistor and said power source potential, a second transistor having a collector-emitter circuit connected in series with at least a part of said current-bias resistance, a float magnet floating on the top surface of said liquid, and a reed switch disposed at the bottom of said vessel in alignment with said float magnet so as to be actuated by said float magnet in response to a lowering of the liquid level below a predetermined level said reed switch being connected betwee a base of said second transistor and said reference potential.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |