US3790810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current power supply for electrical appliances
Assignee: WISS J AND SONS CO
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Filing: 1972-06-30
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Granted: 1974-02-05
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Expires: 1992-06-30
Abstract
Abstract An arrangement in which a center-tapped transformer supplies power for operating a DC motor, as well as charging a battery. Alternating current from the secondary winding of the transformer is rectified through one diode mounted within the transformer unit, and a second diode mounted within the unit carrying the motor. The transformer unit is connected with a three wire plug to the load means, for example, a motor or appliance unit. When the transformer unit is not connected to the applicance unit, the battery operates the motor.
Inventors
- 👤 F Rogers
- 👤 D Berend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J4/00; H02J4/20; H02J4/25; Y; Y10; Y10S; Y10S320/00; Y10S320/11
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
207 words
A power supply arrangement, comprising in combination, transformer means with primary winding connected to a supply of alternating current and secondary winding having a center tap; first rectifying means connected to one terminal of said secondary winding; switch means connected to said secondary winding and said center tap; load means connected by said switch means to said secondary winding in a first operating state, said switch means disconnecting said load from said secondary winding in a second operating state; battery means connected to said switch means for being charged by power from said secondary winding and through said first rectifying means when said switch means is in said second operating state, said battery means being charged with half-wave rectified alternating current; and second rectifying means connected between said switch means and said secondary winding for applying full-wave rectified alternating current to said load means in said first operating state, said load means receiving full-wave rectified current through said first and second rectifying means and said battery means being connected to half of said secondary through said switch means in said first operating state, said battery means being connected across both halves of said secondary winding when charged with half-wave rectified alternating current in said second operating state.
Claim 2
Dependent Claim
207 words
A power supply arrangement, comprising in combination, transformer means with primary winding connected to a supply of alternating current and secondary winding having a center tap; first rectifying means connected to one terminal of said secondary winding; switch means connected to said secondary winding and said center tap; load means connected by said switch means to said secondary winding in a first operating state, said switch means disconnecting said load from said secondary winding in a second operating state; battery means connected to said switch means for being charged by power from said secondary winding and through said first rectifying means when said switch means is in said second operating state, said battery means being charged with half-wave rectified alternating current; and second rectifying means connected between said switch means and said secondary winding for applying full-wave rectified alternating current to said load means in said first operating state, said load means receiving full-wave rectified current through said first and second rectifying means and said battery means being connected to half of said secondary through said switch means in said first operating state, said battery means being connected across both halves of said secondary winding when charged with half-wave rectified alternating current in said second operating state.
Claim 3
Dependent Claim
20 words
The arrangement as defined in claim 1, wherein said first rectifying means and said second rectifying means comprise diode means.
Claim 4
Dependent Claim
33 words
The arrangement as defined in claim 1, including connector means between said switch means and said secondary winding, said first rectifying means being connected in series with one terminal of said secondary winding.
Claim 5
Dependent Claim
22 words
The arrangement as defined in claim 3, wherein said second rectifying means is connected between said connector means and said switch means.
Claim 6
Dependent Claim
15 words
The arrangement as defined in claim 3, wherein said connector means comprises a three-pin connector.
Claim 7
Dependent Claim
28 words
The arrangement as defined in claim 3, wherein said battery means is connected across said load means in said first operating state when said connector means is disengaged.
Claim 8
Dependent Claim
26 words
The arrangement as defined in claim 1, including resistor means connected in series with said battery means for limiting the charging current to said battery means.
Claim 9
Dependent Claim
16 words
The arrangement as defined in claim 1, wherein said battery means comprises a nickel-cadmium rechargeable battery.
Claim 10
Dependent Claim
26 words
The arrangement as defined in claim 1, wherein said battery means is charged with a voltage comprising substantially twice the nominal voltage of said battery means.
Claim 11
Dependent Claim
46 words
The arrangement as defined in claim 1 wherein said battery means is connected in parallel with said load means in said first operating state, said battery means maintaining substantially constant the voltage across said load means upon fluctuations in voltage of said supply of alternating current.
Claim 12
Dependent Claim
53 words
The arrangement as defined in claim 1 wherein said battery means is connected in parallel with said load means in said first operating state, the charge of said battery means being deficient when a decrease in voltage of said supply of alternating current incurs a decrease in power supplied to said load means.
Claim 13
Dependent Claim
154 words
A power supply arrangement comprising, in combination, transformer means with primary winding connected to a supply of alternating current and secondary winding having a center tap; first rectifying means connected to one terminal of said secondary winding; double-pole, double-throw switch means connected to said secondary winding and said center tap; load means connected by said double-pole, double-throw switch means to said secondary winding in a first operating state, said switch means disconnecting said load means from said secondary winding in a second operating state; battery means connected to said switch means for being charged by power from said secondary winding and through said first rectifying means when said switch means is In said second operating state, said battery means being charged with half-wave rectified alternating current; and second rectifying means connected between said switch means and said secondary winding for applying full-wave rectified alternating current to said load means in said first operating state.
Claim 14
Dependent Claim
154 words
A power supply arrangement comprising, in combination, transformer means with primary winding connected to a supply of alternating current and secondary winding having a center tap; first rectifying means connected to one terminal of said secondary winding; double-pole, double-throw switch means connected to said secondary winding and said center tap; load means connected by said double-pole, double-throw switch means to said secondary winding in a first operating state, said switch means disconnecting said load means from said secondary winding in a second operating state; battery means connected to said switch means for being charged by power from said secondary winding and through said first rectifying means when said switch means is In said second operating state, said battery means being charged with half-wave rectified alternating current; and second rectifying means connected between said switch means and said secondary winding for applying full-wave rectified alternating current to said load means in said first operating state.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |