Patent US4875232A successfully refreshed from Google Patents.
US4875232A
Expired / Lapsed
US
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Telephone power distribution and isolation system
Assignee: Individual
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Filing: 1988-06-30
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Granted: 1989-10-17
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Expires: 2008-06-30
Abstract
Abstract A telephone power isolation system that will provide fused AC or DC power for multiple individually isolated telephone circuits using a single AC powered inlet and a multiple pair telephone connector for output connections. LED indicators are provided to illuminate and indicate a blown fuse condition that can be remotely observed and immediately identified.
Inventors
- 👤 Mark P. Shumway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:13
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/08; H04M3/00; H04M3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
A telephone power isolation system comprising a housing having a top face; at least one transformer having an AC input winding and a plurality of output windings, each said transformer extending through the top face; a telephone connector having a two pin pair extending through the top face; electrical connector means including a fuse connecting one side of each output winding to one pin receptacle of said two pin pair and each said face extending through the top face; electrical connector means connecting the other end of each output winding to the other pin receptacle of the two pin pair; an LED adjacent each fuse, with each said LED being electrically connected to the electrical connector means connecting the other end of each output winding to the other pin receptacle and arranged to turn on upon breaking of the circuit through said adjacent fuse and extending through the top face; means carried by the top face to releasably secure a cable connected to the telephone pin connector, and means including a pair of adjustably interconnectable flexible straps; and each of said transformers and its associated fuses and LED's being group together through the top face and independently grouped from each other transformer and its associated fuses and LED's.
Claim 2
Dependent Claim
208 words
A telephone power isolation system comprising a housing having a top face; at least one transformer having an AC input winding and a plurality of output windings, each said transformer extending through the top face; a telephone connector having a two pin pair extending through the top face; electrical connector means including a fuse connecting one side of each output winding to one pin receptacle of said two pin pair and each said face extending through the top face; electrical connector means connecting the other end of each output winding to the other pin receptacle of the two pin pair; an LED adjacent each fuse, with each said LED being electrically connected to the electrical connector means connecting the other end of each output winding to the other pin receptacle and arranged to turn on upon breaking of the circuit through said adjacent fuse and extending through the top face; means carried by the top face to releasably secure a cable connected to the telephone pin connector, and means including a pair of adjustably interconnectable flexible straps; and each of said transformers and its associated fuses and LED's being group together through the top face and independently grouped from each other transformer and its associated fuses and LED's.
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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |