US4245343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic shunt device
Assignee: TYTRONIX Corp A CORP OF NJ
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Filing: 1978-09-22
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Granted: 1981-01-13
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Expires: 1998-09-22
Abstract
Abstract A system is provided for automatically bypassing an inoperative data terminal so that other data terminals connected in series therewith will continue to receive data transmitted from a central data processor. The system includes data terminal status indicators, a manual bypass capability, and a remote audiovisual alarm.
Inventors
- 👤 Ronald G. Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:59
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/74; H04B1/745; H04L; H04L12/00; H04L12/28; H04L12/42; H04L12/437
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
An automatic shunt system for bypassing a data terminal having input terminals connected to an input data cable and out-put terminals for supplying output data comprising: means for sensing the presence of absence of output data at said output data terminals; and switching means responsive to an output signal of said sensing means for connecting said output data terminals to an output data cable only when data is present at said output data terminals, and for connecting said input data cable to said output data cable when data is absent at said output data terminals.
Claim 2
Dependent Claim
95 words
An automatic shunt system for bypassing a data terminal having input terminals connected to an input data cable and out-put terminals for supplying output data comprising: means for sensing the presence of absence of output data at said output data terminals; and switching means responsive to an output signal of said sensing means for connecting said output data terminals to an output data cable only when data is present at said output data terminals, and for connecting said input data cable to said output data cable when data is absent at said output data terminals.
Claim 3
Dependent Claim
29 words
An automatic shunt system according to claim 1, including means for inhibiting the transfer of said sensing means output signal to said switching means for a predetermined time period.
Claim 4
Dependent Claim
30 words
An automatic shunt system according to claim 1, including visual display means responsive to said sensing means for indicating which of said connections has been made by said switching means.
Claim 5
Dependent Claim
17 words
An automatic shunt system according to claim 3, wherein said visual display means comprise light emitting diodes.
Claim 6
Dependent Claim
45 words
An automatic shunt system according to claim 1, including audio and visual alarm means responsive to said sensing means for indicating when said input cable has been connected to said output cable by said switching means, said alarm means including a manual alarm disconnect switch.
Claim 7
Dependent Claim
16 words
An automatic shunt system according to claim 1, including means for manually activating said switching means.
Claim 8
Dependent Claim
26 words
An automatic shunt system according to claim 1, wherein said switching means comprises a multiple pole, double throw relay and a relay coil driver connected thereto.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |