Patent US3900787A successfully refreshed from Google Patents.
US3900787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adapter for automatically adapting dc equipment for energization by a first or second ac voltage of different amplitudes
Assignee: Braun GmbH
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Filing: 1974-03-21
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Granted: 1975-08-19
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Expires: 1994-03-21
Abstract
Abstract DC equipment requiring a determined operating voltage is adapted for energization by a first AC voltage, or a second AC voltage having twice the amplitude of the first AC voltage. Rectifiers rectify the AC voltage and charge an output capacitor connected across the terminals furnishing the operating voltage. A voltage doubler capacitor is provided as is a thyristor which is responsive to a second rectified voltage and connects the voltage doubler capacitor to the rectifier-output capacitor circuit for voltage doubling purposes when the AC voltage is the first AC voltage. A number of full-wave and half-wave arrangements are shown.
Inventors
- 👤 Manfred Koster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:35
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
295 words
A system for automatically adapting equipment requiring a determined DC operating voltage for energization by a first or second AC voltage, said second AC voltage having substantially twice the amplitude of said first AC voltage, said system having a first and second input terminal for receiving said AC voltage and a first and second output terminal for furnishing said determined DC operating voltage, comprising, in combination, output rectifier means for rectifying the applied AC voltage and furnishing a corresponding DC voltage, said DC voltagE constituting said operating voltage when said AC voltage is said second AC voltage, said output rectifier means comprising a first diode having a cathode connected to said first input terminal and an anode connected to said first output terminal, and a second diode having an anode connected to said second input terminal and a cathode connected to said second input terminal; voltage doubler circuit means for doubling said corresponding DC voltage when connected to said output rectifier means, said voltage doubler circuit means comprising a voltage doubler capacitor connected in parallel to said first diode; and voltage responsive means responsive to the applied AC voltage for connecting said voltage doubler circuit means to said rectifier means when said AC voltage is said first AC voltage and for disconnecting said voltage doubler means from said rectifier means when said AC voltage is said second AC voltage, said voltage responsive means comprising input rectifier means for rectifying said AC voltage and furnishing a corresponding DC measurement voltage, and switch means having a first state when said DC measurement voltage corresponds to said first AC voltage and a second state when said DC measurement voltage corresponds to said second AC voltage, and an output capacitor connected from said first to said second output terminal.
Claim 2
Independent Claim
295 words
A system for automatically adapting equipment requiring a determined DC operating voltage for energization by a first or second AC voltage, said second AC voltage having substantially twice the amplitude of said first AC voltage, said system having a first and second input terminal for receiving said AC voltage and a first and second output terminal for furnishing said determined DC operating voltage, comprising, in combination, output rectifier means for rectifying the applied AC voltage and furnishing a corresponding DC voltage, said DC voltagE constituting said operating voltage when said AC voltage is said second AC voltage, said output rectifier means comprising a first diode having a cathode connected to said first input terminal and an anode connected to said first output terminal, and a second diode having an anode connected to said second input terminal and a cathode connected to said second input terminal; voltage doubler circuit means for doubling said corresponding DC voltage when connected to said output rectifier means, said voltage doubler circuit means comprising a voltage doubler capacitor connected in parallel to said first diode; and voltage responsive means responsive to the applied AC voltage for connecting said voltage doubler circuit means to said rectifier means when said AC voltage is said first AC voltage and for disconnecting said voltage doubler means from said rectifier means when said AC voltage is said second AC voltage, said voltage responsive means comprising input rectifier means for rectifying said AC voltage and furnishing a corresponding DC measurement voltage, and switch means having a first state when said DC measurement voltage corresponds to said first AC voltage and a second state when said DC measurement voltage corresponds to said second AC voltage, and an output capacitor connected from said first to said second output terminal.
Claim 3
Dependent Claim
45 words
A system as set forth in claim 1 wherein said switch means comprise a thyristor having an anode connected to said anode of said first diode, a cathode connected to said anode of said second diode and a gate connected to said input rectifier means.
Claim 4
Dependent Claim
35 words
A system as set forth in claim 2, wherein said input rectifier means comprise an input diode, a capacitor connected in series to said input diode, and a resistor connected in series to said capacitor.
Claim 5
Dependent Claim
158 words
A system as set forth in claim 3, wherein said input rectifier means further comprise first voltage divider means connected in parallel to said resistor-capacitor of said input rectifier means and having a first voltage divider tap for furnishing a measuring voltage corresponding to said AC voltage energizing said equipment; and wherein said switch means further comprise second voltage divider means connected in parallel with said resistor and capacitor of said input rectifier means and having a second voltage divider tap for furnishing a second measuring voltage corresponding to said AC voltage applied to said input terminals, a transistor having a gate connected to said first voltage divider tap and an emitter-collector circuit connected from said second voltage divider tap to said second input terminal, for short-circuiting said second measuring voltage when said first measuring voltage corresponds to said first AC voltage; and connecting means for connecting said second voltage divider tap to said gate of said thyristor.
Claim 6
Dependent Claim
16 words
A system as set forth in claim 4, wherein said connecting means comprise a glow tube.
Claim 7
Dependent Claim
45 words
A system as set forth in claim 5, further comprising a parallel resistor-capacitor circuit, a diode connected in series with said parallel resistor-capacitor circuit thereby forming a series circuit, and means for connecting said series circuit in parallel with said emitter-collector circuit of said transistor.
Claim 8
Dependent Claim
30 words
A system as set forth in claim 5, wherein said second voltage divider means comprise a resistor, and a capacitor connected in parallel with said emitter-collector cicuit of said transistor.
Claim 9
Independent Claim
307 words
A system for automatically adapting equipment requiring a determined DC operating voltage for energization by a first or second AC voltage, said second AC voltage having substantially twice the amplitude of said first AC voltage, said system having a first and second input terminal for receiving said AC voltage and a first and second output terminal for furnishing said DC voltage, comprising, in combination, output rectifier means for rectifying the applied AC voltage and furnishing a corresponding DC voLtage, said DC voltage constituting said operating voltage when said AC voltage is said second AC voltage, said output rectifier means comprising a first and second halfwave rectifier circuit connected to form a fullwave rectifier circuit, said first half-wave rectifier circuit comprising a first and second diode having, respectively, a cathode and an anode connected to said first and second input terminal, said second halfwave rectifier circuit comprising a first and second diode having, respectively, an anode and a cathode connected to said first and second input terminal; voltage doubler circuit means for doubling said corresponding DC voltage when connected to said output rectifier means, said voltage doubler circuit means comprising a first and second voltage doubler capacitor connected, respectively, in parallel with said first diode of said first halfwave rectifier circuit and said second diode of said second halfwave rectifier circuit; and voltage responsive means responsive to said applied AC voltage for connecting said voltage doubler circuit means to said rectifier means when said AC voltage is said first AC voltage and for disconnecting said voltage double circuit means from said rectifier means when said AC voltage is said second AC voltage, said voltage responsive means comprising means for connecting said first and second voltage doubler element to said first and second half-wave rectifier circuit respectively when said AC voltage energizing said equipment is said first AC voltage.
Claim 10
Independent Claim
307 words
A system for automatically adapting equipment requiring a determined DC operating voltage for energization by a first or second AC voltage, said second AC voltage having substantially twice the amplitude of said first AC voltage, said system having a first and second input terminal for receiving said AC voltage and a first and second output terminal for furnishing said DC voltage, comprising, in combination, output rectifier means for rectifying the applied AC voltage and furnishing a corresponding DC voLtage, said DC voltage constituting said operating voltage when said AC voltage is said second AC voltage, said output rectifier means comprising a first and second halfwave rectifier circuit connected to form a fullwave rectifier circuit, said first half-wave rectifier circuit comprising a first and second diode having, respectively, a cathode and an anode connected to said first and second input terminal, said second halfwave rectifier circuit comprising a first and second diode having, respectively, an anode and a cathode connected to said first and second input terminal; voltage doubler circuit means for doubling said corresponding DC voltage when connected to said output rectifier means, said voltage doubler circuit means comprising a first and second voltage doubler capacitor connected, respectively, in parallel with said first diode of said first halfwave rectifier circuit and said second diode of said second halfwave rectifier circuit; and voltage responsive means responsive to said applied AC voltage for connecting said voltage doubler circuit means to said rectifier means when said AC voltage is said first AC voltage and for disconnecting said voltage double circuit means from said rectifier means when said AC voltage is said second AC voltage, said voltage responsive means comprising means for connecting said first and second voltage doubler element to said first and second half-wave rectifier circuit respectively when said AC voltage energizing said equipment is said first AC voltage.
Claim 11
Dependent Claim
76 words
A system as set forth in claim 8, wherein said voltage responsive means comprise input rectifier means for furnishing a measuring voltage corresponding to said AC voltage energizing said equipment, and a first and second thyristor responsive to said measuring voltage for connecting said first and second voltage doubler capacitor to said first and second half wave rectifier circuits respectively when said measuring voltage corresponds to an AC voltage substantially equal to said first AC voltage.
Claim 12
Dependent Claim
50 words
A system as set forth in claim 9, wherein said first and second thyristor each have an anode; further comprising a first and second buffer diode each having an anode connected to said first output terminal and a cathode connected to said anode of the corresponding one of said thyristors.
Claim 13
Independent Claim
306 words
A system for automatically adapting equipment requiring a determined DC operating voltage for energization by a first AC voltage or a second AC voltage having substantially twice the amplitude of said first AC voltage, said system having a first and second input terminal for receiving said AC voltage and a first and second output terminal for furnishing said determined DC operating voltage, comprising, in combination, an output capacitor connected from said first to said second output terminal; output rectifier means for rectifying the applied AC voltage and furnishing a corresponding DC voltage, said DC voltage constituting said operating voltage when said AC voltage is said second AC voltage, said output rectifier means comprising a first diode having an anode connected to said first output terminal and a cathode connected to said first input terminal, and a second diode having an anode connected to said second input terminal and a cathode connected to said second output terminal; voltage doubler circuit means for doubling said corresponding DC voltage when connected to said output rectifier means, said voltage doubler circuit means comprising a voltage doubler capacitor having a first terminal connected to said first input terminal and a second terminal; and voltage responsive means responsive to said applied AC voltage for connecting said voltage doubler circuit means to said rectifier means when said AC voltage is said first AC voltage and for disconnecting said voltage doubler means from said rectifier means when said AC voltage is said second AC voltage, said voltage responsive means comprising switch means for connecting said second terminal of said voltage doubler capacitor to said first output terminal when said AC voltage is said first AC voltage and for disconnecting said second terminal of said voltage doubler capacitor from said first output terminal when said AC voltage energizing said equipment is said second AC voltage.
Claim 14
Independent Claim
306 words
A system for automatically adapting equipment requiring a determined DC operating voltage for energization by a first AC voltage or a second AC voltage having substantially twice the amplitude of said first AC voltage, said system having a first and second input terminal for receiving said AC voltage and a first and second output terminal for furnishing said determined DC operating voltage, comprising, in combination, an output capacitor connected from said first to said second output terminal; output rectifier means for rectifying the applied AC voltage and furnishing a corresponding DC voltage, said DC voltage constituting said operating voltage when said AC voltage is said second AC voltage, said output rectifier means comprising a first diode having an anode connected to said first output terminal and a cathode connected to said first input terminal, and a second diode having an anode connected to said second input terminal and a cathode connected to said second output terminal; voltage doubler circuit means for doubling said corresponding DC voltage when connected to said output rectifier means, said voltage doubler circuit means comprising a voltage doubler capacitor having a first terminal connected to said first input terminal and a second terminal; and voltage responsive means responsive to said applied AC voltage for connecting said voltage doubler circuit means to said rectifier means when said AC voltage is said first AC voltage and for disconnecting said voltage doubler means from said rectifier means when said AC voltage is said second AC voltage, said voltage responsive means comprising switch means for connecting said second terminal of said voltage doubler capacitor to said first output terminal when said AC voltage is said first AC voltage and for disconnecting said second terminal of said voltage doubler capacitor from said first output terminal when said AC voltage energizing said equipment is said second AC voltage.
Claim 15
Dependent Claim
134 words
A system as set forth in claim 11, wherein said switch means comprise a thyristor having an anode-cathode circuit connected from said voltage doubler to said output capacitor said thyristor further having a gate; wherein said voltage responsive means further comprise input rectifier means connected from said first to said second input terminal for furnishing a DC voltage corresponding to said AC voltage energizing said equipment; and control circuit means connected to said input rectifier means and said gate of said thryistor, for connecting said gate of said thyristor to said cathode of said thyristor when said DC voltage corresponds to said second AC voltage and for connecting said gate of said thyristor to said input rectifier thereby gating said thyristor to the conductive state, when said AC voltage is said first AC voltage.
Claim 16
Dependent Claim
92 words
A system as set forth in claim 12, wherein said input rectifier means comprise a first and second voltage divider having, respectively, a first and second voltage divider tap; wherein said control circuit means comprise input switch means having a control electrode connected to said first voltage divider tap, for short-circuiting the voltage at said second voltage divider tap when the voltage at said first voltage divider tap corresponds to said second AC voltage; further comprising a Zener diode for connecting the gate of said thyristor to said second voltage divider tap.
Claim 17
Dependent Claim
143 words
A system as set forth in claim 13, wherein said second voltage divider comprises a resistor having one terminal connected to said first input terminal and a second terminal connected to said second voltage divider tap, a rectifier having an anode connected to said voltage divider tap and a cathode, a parallel resistor-capacitor circuit having a first terminal connected to said cathode of said rectifier and a second terminal, and an additional rectifier having an anode connected to said second terminal of said parallel resistor-capacitor circuit and a cathode connected to said second input terminal; and wherein said control circuit means comprise a transistor having a gate connected to said first voltage divider terminal and an emitter-collector circuit connected in parallel with said parallel resistor-capacitor circuit, and a Zener diode connected between said gate of said thyristor and said second voltage divider tap.
Claim 18
Dependent Claim
27 words
A system as set forth in claim 13, further comprising an additional Zener diode interconnected between said gate of said transistor and said first voltage divider tap.
Claim 19
Dependent Claim
30 words
A system as set forth in claim 13, further comprising a series circuit including a resistor and a diode connected from said first input terminal to said second output terminal.
Claim 20
Dependent Claim
52 words
A system as set forth in claim 15, further comprising a second system identical to said system, and means for connecting the input terminals of said system and said second system together but with reverse polarity and means for connecting the output terminals to said second system directly to said output terminals.
Claim 21
Independent Claim
216 words
A system having a first and second input terminal for receiving an AC voltage having a first amplitude or a second amplitude substantially twice said first amplitude, and a first and second output terminal for furnishing a DC operating voltage having a predetermined amplitude in response to said AC voltage independent of the amplitude thereof, comprising, in combination, an output capacitor connected between said first and second output terminal; a voltage doubler capacitor having a first terminal connected to said first input terminal and a second terminal; switch means having a main conducting ciRcuit connected in series between said output capacitor and said voltage doubler capacitor, said switch means further having a control electrode; a first diode connected in parallel with said main conducting circuit and said voltage doubler capacitor; a second diode connected from said second terminal of said voltage doubler capacitor to said second input terminal; a third diode connected from said second input terminal to said second output terminal; and voltage responsive means connected to said first input terminal and said control electrode of said switch means for switching said switch means to the conductive state when said AC voltage has said first amplitude and for maintaining said main conducting circuit in the non-conductive state when said AC voltage has said second amplitude.
Claim 22
Independent Claim
216 words
A system having a first and second input terminal for receiving an AC voltage having a first amplitude or a second amplitude substantially twice said first amplitude, and a first and second output terminal for furnishing a DC operating voltage having a predetermined amplitude in response to said AC voltage independent of the amplitude thereof, comprising, in combination, an output capacitor connected between said first and second output terminal; a voltage doubler capacitor having a first terminal connected to said first input terminal and a second terminal; switch means having a main conducting ciRcuit connected in series between said output capacitor and said voltage doubler capacitor, said switch means further having a control electrode; a first diode connected in parallel with said main conducting circuit and said voltage doubler capacitor; a second diode connected from said second terminal of said voltage doubler capacitor to said second input terminal; a third diode connected from said second input terminal to said second output terminal; and voltage responsive means connected to said first input terminal and said control electrode of said switch means for switching said switch means to the conductive state when said AC voltage has said first amplitude and for maintaining said main conducting circuit in the non-conductive state when said AC voltage has said second amplitude.
Claim 23
Dependent Claim
96 words
A system as set forth in claim 18, wherein said switch means comprise a thyristor having an anode connected to said output capacitor and a cathode connected to said voltage doubler capacitor; wherein said first diode has an anode connected to said output capacitor and a cathode connected to said first input terminal; and wherein said second and third diode are connected in series with the same polarity, the anode of said second diode being connected to said cathode of said thyristor and the cathode of said second diode being connected to said second output terminal.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |