US4710693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Front loading continuous charger
Assignee: Individual
•
Filing: 1987-04-17
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Granted: 1987-12-01
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Expires: 2007-04-17
Abstract
Abstract A front loading facility for continuously charging rechargeable batteries in headphones or other device, comprises an enclosure containing a slidable drawer in which rests the device to be charged. The device to be charged has contacts which bear against spring contacts when the drawer is closed, but a spring ejects the drawer upon energizing of a solenoid of actuated latch. A voltage and current regulated power supply continuously charges the batteries through a light emitting diode, which has a secondary function of preventing inadvertent battery discharge.
Inventors
- 👤 Arthur H. Wigell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:19
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/70; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/19
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A front loading continuous charging facility for radio headphones or other device using rechargeable batteries comprising: an outer enclosure having an electrically releasable latch, a drawer slidable within the outer enclosure having latch engagement means releasably engaged by said latch, a depression in the drawer of shape complementary to the shape of the device to be charged, resilient contacts in the drawer co-operable with complementary contacts on said device to be charged when contained in the drawer and the drawer is closed, and a voltage and current regulated power supply circuit in said enclosure coupled to said contacts.
Claim 2
Dependent Claim
98 words
A front loading continuous charging facility for radio headphones or other device using rechargeable batteries comprising: an outer enclosure having an electrically releasable latch, a drawer slidable within the outer enclosure having latch engagement means releasably engaged by said latch, a depression in the drawer of shape complementary to the shape of the device to be charged, resilient contacts in the drawer co-operable with complementary contacts on said device to be charged when contained in the drawer and the drawer is closed, and a voltage and current regulated power supply circuit in said enclosure coupled to said contacts.
Claim 3
Dependent Claim
77 words
A front loading continuous charging facility according to claim 1 wherein said voltage and current regulated power supply circuit comprises a first voltage regulator, a current regulator, a second voltage regulator, a first light emitting diode between the first voltage regulator and one of said resilient contacts, a comparator coupled to said one of resilient contacts and to the output of the current regulator, and a second light emitting diode coupled to the output of the comparator.
Claim 4
Dependent Claim
83 words
A front loading continuous charging facility according to claim 1 wherein said electrically releasable latch comprises a solenoid having a spring loaded plunger, a diode in a first power supply line to said solenoid, a capacitor coupled to the output of the diode and a second power supply line to said solenoid, a power transistor across the capacitor, and a push button which, upon closure, biases the power transistor into conduction to conduct a surge of current from the capacitor through the solenoid.
Claim 5
Dependent Claim
31 words
A front loading continuous charging facility according to claim 3 wherein said enclosure contains an ejection spring which urges the drawer to an open position when said solenoid releases said latch.
Claim 6
Dependent Claim
33 words
A front loading continuous charging facility according to claim 1 wherein said enclosure comprises a lid hinged at one end to close over said device to be charged when contained in said drawer.
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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |