US3812302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test desk including a manually controlled connect matrix
Assignee: AG Communication Systems Corp
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Filing: 1973-04-06
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Granted: 1974-05-21
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Expires: 1993-04-06
Abstract
Abstract A test desk is equipped with pushbutton controls and a manually controlled connect matrix for establishing connections between any one of a number of test circuits and any one of a number of test trunks. Provisions are included for preventing double or multiple connections, as well as for tracing connections.
Inventors
- 👤 K Herr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:14
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
293 words
An arrangement for connecting any one of a plurality of test circuits to any one of a plurality of test trunks comprising, in combination: a connect matrix of the crosspoint relay type having a plurality of matrix crosspoints, each of which comprises a crosspoint relay having a plurality of matrix contacts for establishing connections between the input and output leads thereof, pull leads to which pull potentials are applied to operate said crosspoint relays and hold leads to which hold potentials are applied to hold said crosspoint relays operated; said test circuits and said test trunks being connected to said input leads and said output leads, respectively; and manually operated access control means for establishing a connection between one of said plurality of test circuits and one of said plurality of test trunks comprising a plurality of first pushbuttons, each of which is associated with one of said test circuits, a plurality of select relays, each of which is associated with one of said first pushbuttons and operated therewith to couple a pull potential to the pull lead of the input to which said test circuit associated with said pushbutton is connected and to the crosspoint relays connected therewith, a plurality of second pushbuttons, each of which is associated with one of said test trunks, said second pushbuttons upon being operated applying an operating potential to the pull lead of the output to which its associated test trunk is connected to operate one of the crosspoint relays and thereupon applying a hold potential to its associated hold lead to hold said crosspoint relay operated, whereby a connection through said connect matrix from a test circuit to a test trunk is established simply by operating the respective first and second pushbuttons associated with them.
Claim 2
Dependent Claim
293 words
An arrangement for connecting any one of a plurality of test circuits to any one of a plurality of test trunks comprising, in combination: a connect matrix of the crosspoint relay type having a plurality of matrix crosspoints, each of which comprises a crosspoint relay having a plurality of matrix contacts for establishing connections between the input and output leads thereof, pull leads to which pull potentials are applied to operate said crosspoint relays and hold leads to which hold potentials are applied to hold said crosspoint relays operated; said test circuits and said test trunks being connected to said input leads and said output leads, respectively; and manually operated access control means for establishing a connection between one of said plurality of test circuits and one of said plurality of test trunks comprising a plurality of first pushbuttons, each of which is associated with one of said test circuits, a plurality of select relays, each of which is associated with one of said first pushbuttons and operated therewith to couple a pull potential to the pull lead of the input to which said test circuit associated with said pushbutton is connected and to the crosspoint relays connected therewith, a plurality of second pushbuttons, each of which is associated with one of said test trunks, said second pushbuttons upon being operated applying an operating potential to the pull lead of the output to which its associated test trunk is connected to operate one of the crosspoint relays and thereupon applying a hold potential to its associated hold lead to hold said crosspoint relay operated, whereby a connection through said connect matrix from a test circuit to a test trunk is established simply by operating the respective first and second pushbuttons associated with them.
Claim 3
Dependent Claim
39 words
The arrangement of claim 1, further including an indicator lamp associated with each of said test circuits and energized when said select relay associated with a test circuit is operated, to thereby indicate said test circuit is in use.
Claim 4
Dependent Claim
125 words
The arrangemeNt of claim 1, further including a plurality of first relays, each of which is associated with one of said test circuits and is connected to the hold lead of the input to which said test circuits is connected, a plurality of second relays, each of which is associated with one of said test trunks and is connected to the hold lead of the output to which said test trunk is connected, said first and second relays being operated when a crosspoint relay is operated and applies a hold potential to its associated hold leads, said first and second relays in operating removing the pull potential from the pull lead associated with the operated crosspoint relay, to thereby prevent double connections from being established.
Claim 5
Dependent Claim
45 words
The arrangement of claim 3, further including an indicator lamp associated with each of said test trunks, said indicator lamp being energized when said test trunk is selected and coupled with a test circuit when said first relay associated with said test circuit is operated.
Claim 6
Dependent Claim
83 words
The arrangement of claim 4, further including an interrupted source of power, said interrupted source of power being connected to an indicator lamp associated with a test trunk when the pushbutton associated with the test circuit connected to said test trunk is operated to cause said test trunk''s indicator lamp to flash, whereby the connection between any one of said test circuits and a test trunk can be traced simply by operating its associated pushbutton and observing which test trunk indicator lamp flashes.
Claim 7
Dependent Claim
37 words
The arrangement of claim 1, wherein said pushbuttons and said select relays associated with them all are electrically interlocked such that a previously operated select relay is released upon the operation of another one of said pushbuttons.
Claim 8
Dependent Claim
42 words
The arrangement of claim 6, further including an indicator lamp associated with each of said test circuits and energized to glow brightly when said select relay associated with a test circuit is operated, to thereby indicate said test circuit is in use.
Claim 9
Dependent Claim
125 words
The arrangement of claim 7, further including a plurality of first relays, each of which is associated with one of said test circuits and is connected to the hold lead of the input to which said test circuit is connected, a plurality of second relays, each of which is associated with one of said test trunks and is connected to the hold lead of the output to which said test trunk is connected, said first and second relays being operated when a crosspoint relay is operated and applied a hold potential to its associated hold leads, said first and second relays in operating removing the pull potential from the pull lead associated with the operated crosspoint relay, to thereby prevent double connections from being established.
Claim 10
Dependent Claim
86 words
The arrangement of claim 8, wherein said first relays in operating apply a resistance ground to said indicator lamps associated with said test circuits to cause them to be dimly illuminated, an indicator lamp associated with a test circuit in use normally being energized to glow brightly by its associated select relay, said select relay upon being released when another one of said first pushbuttons is operated removing the energizing potential from said indicator lamp and the resistance ground then causing it to be dimly illuminated.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |