US3746897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic multi-frequency system
Assignee: Ultrasonic Systems Inc
•
Filing: 1971-07-28
•
Granted: 1973-07-17
•
Expires: 1991-07-28
Abstract
Abstract The system includes converter means for transforming regular current; i.e.., 60 cycles per second, to electrical current at different frequencies in the sonic and/or ultrasonic range for driving individual motors each connected to the converter means for being energized at a different frequency.
Inventors
- 👤 M Karatjas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
246 words
A system for providing multi-frequency mechanical energy in the sonic and ultrasonic frequency range comprising: A. starting oscillator means adapted to be connected to a source of electrical energy, capable of oscillating at several preselected frequencies responsive to a preselected command for providing a starting voltage, said oscillator means including: a. a transistor, having emitter, base, and collector electrodes, said emitter electrode being adapted to be resistively coupled to a source of DC voltage, said collector electrode being resistively coupled to a reference ground, b. a transformer having a primary winding, a secondary winding having an impedance matching tap thereon, and a first and second feedback winding, said primary winding being coupled between said collector electrode and said reference ground, one end of said secondary winding being connected to said source of voltage, said second feedback winding being coupled to transducer means, c. first and second resistors being coupled in series, having a junction point, between said source of DC voltage and said reference ground, said junction point being coupled to said base electrode via said first feedback winding, and d. capacitor means coupled across said secondary winding for determining the frequency of said oscillaTor; B. amplifier means coupled to said oscillator means for amplifying said starting voltage at each said preselected frequency; and C. said transducer means coupled to said amplifier means for changing the amplified starting voltage to mechanical energy and providing a feedback voltage to said oscillator transformer sustaining each said preselected frequency.
Claim 2
Independent Claim
246 words
A system for providing multi-frequency mechanical energy in the sonic and ultrasonic frequency range comprising: A. starting oscillator means adapted to be connected to a source of electrical energy, capable of oscillating at several preselected frequencies responsive to a preselected command for providing a starting voltage, said oscillator means including: a. a transistor, having emitter, base, and collector electrodes, said emitter electrode being adapted to be resistively coupled to a source of DC voltage, said collector electrode being resistively coupled to a reference ground, b. a transformer having a primary winding, a secondary winding having an impedance matching tap thereon, and a first and second feedback winding, said primary winding being coupled between said collector electrode and said reference ground, one end of said secondary winding being connected to said source of voltage, said second feedback winding being coupled to transducer means, c. first and second resistors being coupled in series, having a junction point, between said source of DC voltage and said reference ground, said junction point being coupled to said base electrode via said first feedback winding, and d. capacitor means coupled across said secondary winding for determining the frequency of said oscillaTor; B. amplifier means coupled to said oscillator means for amplifying said starting voltage at each said preselected frequency; and C. said transducer means coupled to said amplifier means for changing the amplified starting voltage to mechanical energy and providing a feedback voltage to said oscillator transformer sustaining each said preselected frequency.
Claim 3
Dependent Claim
33 words
A system for providing multi-frequency mechanical energy in the sonic and ultrasonic frequency range according to claim 6 wherein said amplifier means comprises a low level integrated circuit amplifier and a power amplifier.
Claim 4
Dependent Claim
142 words
A system for providing multi-frequency mechanical energy according to claim 2 wherein said power amplifier comprises: a. an interstage transformer, having a primary winding adapted to be coupled to said low level amplifier and a secondary winding with a center-tap thereon, b. at least two power transistors having emitter collector and base electrodes, said base electrodes being adapted to be resistively coupled to the ends of the secondary of said interstage transformer winding, said emitter electrodes adapted to be resistively coupled to said interstage transformer center-tap, and c. a power output transformer having a primary winding with a center-tap thereon, and a secondary winding having multiple taps thereon, adapted to be connected to said transducer means, said primary winding being connected to the collector electrodes of said power transistors, said center-tap being adapted to be connected to a source of operating potential.
Claim 5
Dependent Claim
33 words
A system for providing multi-frequency mechanical energy according to claim 3 further including a pair of diodes coupled from the collector electrodes of said power transistors to said center-tap of said interstage transformer.
Claim 6
Dependent Claim
40 words
A systems for providing multi-frequency mechanical energy according to claim 3 further including a capacitor connected in series with a resistor and diode connected in parallel, coupled between the collector electrodes of said power transistors and said interstage transformer center-tap.
Claim 7
Dependent Claim
30 words
A system according to claim 1 further including a potentiometer coupled between said source of DC voltage and said secondary winding impedance matching tap for providing an adjustable output voltage.
Claim 8
Dependent Claim
29 words
A system according to claim 1 further including a pair of diodes connected in parallel across said second feedback winding, said diodes being oppositely poled in ease of conductivity.
Claim 9
Dependent Claim
80 words
A system according to claim 1 wherein said capacitor means includes: a. first, second, third and fourth capacitors, said first capacitor being connected across said secondary winding, said second, third and fourth capacitors having one side of each coupled in common to said source of DC voltage and one end of said secondary winding, and b. switch means connected from the other end of said secondary winding and either of the other ends of said first, second, or third capacitors.
Claim 10
Dependent Claim
16 words
A system according to claim 8 wherein said switch means comprises a three position selector switch.
Claim 11
Dependent Claim
22 words
A system according to claim 8 wherein said switch means comprises two relays connected to effectively function as a three position switch.
References Cited (Backward Citations)
US2178225A
Cited
US2937640A
Cited
US2799787A
Cited
US2846874A
Cited
US2985003A
Cited
US3100886A
Cited
US3447051A
Cited
US3371233A
Cited
US3582733A
Cited
US3539888A
Cited
US3489930A
Cited
US3586936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |