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US3576401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bridging units for terminating leased lines in telephone line circuits
Assignee: U S Holding Co Inc
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Filing: 1968-02-26
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Granted: 1971-04-27
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Expires: 1988-02-26
Abstract
Abstract Public address type paging equipment is used in connection with a telephone, such equipment being connected into a conventional telephone system via leased lines. To page a subscriber at a distant location, a local subscriber sends a momentary burst of tone over the leased line. Equipment at the distant end of the line responds by connecting the line to paging equipment for a period of time which is long enough to complete an average page, whereupon a private telephone conversation may be commenced between the local subscriber and the paged party.
Inventors
- 👤 Bruce Ronald Saxon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:30
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/02; H04M11/022; H04M9/00; H04M9/001
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
In a telephone networK, a telephone line connected to said network, bridging apparatus connected to said line, station equipment connected to said bridging apparatus and actuatable through said apparatus, an amplifier connected between said station equipment and said bridging apparatus said bridging apparatus comprising: means responsive to a single tone burst of limited duration received over said line from said network for enabling said amplifier for the transmission of signals from said telephone line to said station equipment, means for maintaining said amplifier enabled during a timing sequence following cessation of said tone burst, and means responsive to a circuit closure at said station equipment for disabling said amplifier, further means responsive to said circuit closure for establishing a voice transmission path from said station equipment to said line independently of said timing sequence.
Claim 2
Dependent Claim
134 words
In a telephone networK, a telephone line connected to said network, bridging apparatus connected to said line, station equipment connected to said bridging apparatus and actuatable through said apparatus, an amplifier connected between said station equipment and said bridging apparatus said bridging apparatus comprising: means responsive to a single tone burst of limited duration received over said line from said network for enabling said amplifier for the transmission of signals from said telephone line to said station equipment, means for maintaining said amplifier enabled during a timing sequence following cessation of said tone burst, and means responsive to a circuit closure at said station equipment for disabling said amplifier, further means responsive to said circuit closure for establishing a voice transmission path from said station equipment to said line independently of said timing sequence.
Claim 3
Dependent Claim
75 words
A bridging apparatus as claimed in claim 1, from said station equipment further comprising an oscillator, means responsive to initiation of a signal for connecting said oscillator to the telephone line to transmit a burst of tone thereover, means responsive to said signal initiation for disabling said amplifier from transmission to said station equipment, and means responsive to the initiation of said signal for terminating the transmission of a tone burst after a timed period.
Claim 4
Dependent Claim
34 words
A bridging apparatus as claimed in claim 1, further comprising means responsive to the end of said timing sequence for automatically disabling said amplifier to disable the transmission of signals to the subscriber station.
References Cited (Backward Citations)
US3126448A
Cited
US2071053A
Cited
US3100244A
Cited
US3296372A
Cited
US3283075A
Cited
US3283076A
Cited
US3321580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |