US3740589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blocking oscillator with current mode transformer
Assignee: Individual
•
Filing: 1971-02-16
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Granted: 1973-06-19
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Expires: 1991-02-16
Abstract
Abstract A blocking oscillator of free running or triggered input type includes a non-saturable current transformer connected in series with a transistor and a storage inductor to provide a feedback signal with means independent and separate from the transformer initiating and terminating the charging cycle. The storage inductor may be provided with a special current feedback sensing winding paralleled with a resistor and capacitor to fire a control rectifier connected directly across the input circuit of the transistor. The capacitor may be discharged to a variable reference and provide an adjustable control. The sensing circuit can include a saturable winding in series with a resistor. A series sensing resistor can also be connected in the charging circuit to fire a control rectifier to divert the power from the current transformer and thereby turn off the charging transistor.
Inventors
- 👤 F Minks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:48
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30; H03K3/35; H03K3/352
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A blocking oscillator, comprising an amplifying stage having an input means, a storage inductor means having a charging winding, a current transformer having a primary winding and a secondary winding, circuit means connecting said amplifying stage in a series circuit with said charging winding and said primary winding, a feedback circuit means connecting said secondary winding to the input means of said amplifying stage to maintain conduction of said amplifying stage, and circuit cut off switch means connected to said secondary winding and operatively by-passing said secondary winding from said input means to terminate conduction of said amplifying stage.
Claim 2
Dependent Claim
99 words
A blocking oscillator, comprising an amplifying stage having an input means, a storage inductor means having a charging winding, a current transformer having a primary winding and a secondary winding, circuit means connecting said amplifying stage in a series circuit with said charging winding and said primary winding, a feedback circuit means connecting said secondary winding to the input means of said amplifying stage to maintain conduction of said amplifying stage, and circuit cut off switch means connected to said secondary winding and operatively by-passing said secondary winding from said input means to terminate conduction of said amplifying stage.
Claim 3
Dependent Claim
54 words
The blocking oscillator of claim 1 wherein said primary winding of said current transformer is connected between said amplifying stage and said charging winding, and said secondary winding has a first terminal connected between said amplifying stage and said primary winding and a second terminal connected to the input means of said amplifying stage.
Claim 4
Dependent Claim
28 words
The blocking oscillator of claim 2 having an electronic switch means connected to said second terminal and to said series circuit to shunt power from said input means.
Claim 5
Dependent Claim
42 words
The blocking oscillator of claim 3 wherein said storage Inductor unit includes a sensing winding, a current sensitive means is connected across said sensing winding and is connected to energize said electronic switch means to thereby terminate conduction of said amplifying stage.
Claim 6
Dependent Claim
36 words
The blocking oscillator of claim 1 wherein said feedback loop includes a triggered rectifier means having an input gate means, a pulse source connected to said gate means and to said amplifying stage to initiate conduction.
Claim 7
Dependent Claim
33 words
The blocking oscillator of claim 1 wherein said cut off means includes a triggered rectifier means connected to said secondary winding to shunt the current from said amplifying stage and thereby terminate conduction.
Claim 8
Dependent Claim
73 words
The oscillator of claim 1 wherein said feedback loop includes a triggered controlled rectifier means having an input gate means, a pulse source connected to said gate means and to said amplifying stage to initiate conduction and said cut off means includes a triggered controlled rectifier means connected to said secondary winding to shunt the current from said amplifying stage and said rectifier means and thereby terminate conduction and reset said rectifier means.
Claim 9
Dependent Claim
23 words
The blocking oscillator of claim 1 wherein the turns ratio of said primary winding to said secondary winding is essentially one to six.
Claim 10
Dependent Claim
63 words
The blocking oscillator of claim 1 wherein said primary and secondary windings have a common end connection, and said circuit cut off switch means is a gated rectifier connected across said secondary winding in series with said primary winding, and means responsive to the current level in said charging winding to actuate said gated rectifier and thereby terminating conduction of said amplifying stage.
Claim 11
Dependent Claim
68 words
The oscillator of claim 1 wherein said cut off means includes a triggered rectifier means connected to said secondary winding and to the input means of the amplifying stage and to the charging winding, said storage inductor unit having a sensing winding, a current sensitive means connected across said sensing winding and connected to fire said triggered controlled rectifier means and thereby terminate conduction of said amplifying stage.
Claim 12
Dependent Claim
101 words
The oscillator of claim 1 wherein said feedback loop includes a triggered controlled rectifier means having an input gate means, a pulse source connected to said gate means and to said amplifying stage to initiate conduction, and said cut off means includes a triggered controlled rectifier means connected to said secondary winding and to the input means of the amplifying stage and to the charging winding, said storage inductor unit having a sensing winding, a current sensitive switch means connected across said sensing winding and connected to fire said triggered controlled rectifier means and thereby terminate conduction of said amplifying stage.
Claim 13
Dependent Claim
68 words
The oscillator of claim 1 wherein said feedback loop includes a sensing resistor means connected in series with the secondary winding to said amplifying stage, and said cut off means includes a voltage sensitive switching means connected to said secondary winding to shunt the secondary current from said amplifying stage and having an input means connected across said resistor means to terminate conduction at a selected secondary current.
Claim 14
Dependent Claim
72 words
The blocking oscillator of claim 12 having a common return line and wherein said switching means includes transistor means having a first element connected to said secondary winding and said amplifying stage and a second element connected to said return line and having a third element, and a diode connected to said third element and said sensing resistor means to apply the voltage across said input means in series with said diode.
Claim 15
Dependent Claim
73 words
The oscillator of claim 1 wherein said cut off means includes a triggered rectifier means connected to said secondary winding and to the input means of the amplifying stage and to the charging winding and having a gate means to initiate conduction therethrough, a sensing resistor means connected in series with the charging winding and coNnected across the gate means of said triggered controlled rectifier means to terminate conduction at a selected current.
Claim 16
Dependent Claim
140 words
The oscillator of claim 1 wherein said amplifying stage includes a transistor having an emitter-collector output means connected in circuit with said charging winding and having a base-emitter input means, said feedback loop includes a first triggered controlled rectifier means having an input gate means, a pulse source connected to said gate means and in series with said base-emitter input means to initiate conduction, said secondary winding being connected in parallel with said controlled rectifier and said base-emitter input means and said cut off means includes a second triggered controlled rectifier means connected between said secondary winding and said charging winding, a sensing resistor connected between said second triggered controlled rectifier means and said charging winding, said second rectifier means having a gate means connected across said sensing resistor to terminate conduction of said amplifying stage at a selected current.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |