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US3573373A Expired / Lapsed US ⏱️ 0.0 years remaining

Cable terminating system for key telephone closets

Assignee: AT&T Inc
•
Filing: 1968-03-21
•
Granted: 1971-04-06
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Expires: 1988-03-21
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Abstract

Abstract A building-block approach to terminal arrangements in a key telephone station closet is described in which the connector blocks are mounted in functional groups. Each group is expandable within the closet by virtue of factory-provided boards equipped with prepositioned mounting brackets for the blocks. The board size and bracket spacing is such that jumper wires are led either vertically or horizontally between the brackets with the aid of open finger guides instead of rings. Lead-in cable is run beneath the connector block brackets, leaving the space between blocks exclusively for jumper leads.

Inventors

  • 👤 Francis J Mullin
  • 👤 Raymond B Ramsey
  • 👤 Christian Scholly

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 06:18
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; H; H04; H04Q; H04Q1/00; H04Q1/02; H04Q1/06; H04Q1/14; H04Q1/142

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 251 words
In a key telephone system, apparatus for interconnecting the associated key unit cables, telephone station cables and feeder cables, comprising: a generally rectangular vertical surface comprising at least three contiguous sections including: a feeder cable section; a key telephone section; and a key unit section; each section having an exterior edge; said feeder cable section and key telephone section each containing one or more backboards, each backboard comprising: at least one elongated bracket having an exterior surface, means for snap mounting one or more connector blocks onto said exterior surface, and a pair of side legs including first and second slotted tabs associated respectively with said legs for receiving a fastener to said backboard, said side legs defining a relatively enclosed continuous interior passage, one or more connector blocks associated with each bracket, each block including means for engaging a bracket snap mounting means; said key unit section containing one or more backboards each comprising: one or more elongated connector blocks fastened to said backboard and a free corridor for jumper wires between the key unit backboard interior edge and the interior edge of the lastnamed connector blocks; the key unit and key telephone backboards having like rectangular shapes and a common linear interface to which all said brackets as well as the key unit blocks are substantially perpendicular; and means for leading all said feeder cables and said station cables into and through their respective bracket interior passages, thereby to confine said cables and avoid their interfering with jumper wires.
Claim 2
Dependent Claim 251 words
In a key telephone system, apparatus for interconnecting the associated key unit cables, telephone station cables and feeder cables, comprising: a generally rectangular vertical surface comprising at least three contiguous sections including: a feeder cable section; a key telephone section; and a key unit section; each section having an exterior edge; said feeder cable section and key telephone section each containing one or more backboards, each backboard comprising: at least one elongated bracket having an exterior surface, means for snap mounting one or more connector blocks onto said exterior surface, and a pair of side legs including first and second slotted tabs associated respectively with said legs for receiving a fastener to said backboard, said side legs defining a relatively enclosed continuous interior passage, one or more connector blocks associated with each bracket, each block including means for engaging a bracket snap mounting means; said key unit section containing one or more backboards each comprising: one or more elongated connector blocks fastened to said backboard and a free corridor for jumper wires between the key unit backboard interior edge and the interior edge of the lastnamed connector blocks; the key unit and key telephone backboards having like rectangular shapes and a common linear interface to which all said brackets as well as the key unit blocks are substantially perpendicular; and means for leading all said feeder cables and said station cables into and through their respective bracket interior passages, thereby to confine said cables and avoid their interfering with jumper wires.
Claim 3
Dependent Claim 51 words
A system in accordance with claim 1, wherein each said corridor contains a plurality of guideposts, with one such post being stationed diagonally adjacent each connector block corner contiguous to said corridor, and each post comprising an outwardly tapering shank and a cap; the posts serving as guides for jumper wire.
Claim 4
Dependent Claim 54 words
A system in accordance with claim 2 wherein each said telephone station backboard comprises four equally spaced columns of two brackets each, arranged end to end with the outermost bracket ends being contiguous with the backboard edges, two such boards when placed end to end thereby effecting a connection of station cable passages therebetween.
Claim 5
Dependent Claim 81 words
A system in accordance with claim 2 wherein said bracket snap-mounting means comprises first and second resilient arm pairs at each bracket end and extending beyond said exterior surface, each arm having an inwardly beveled end and a catch beneath the bevel; and wherein said block-engaging means comprises a base with tab extensions spaced to spread said arm pairs upon insertion of said block into said arms, said tabs engaging said catches when said block base contacts said bracket exterior surface.

References Cited (Backward Citations)

US1639310A Cited
US2233107A Cited
GB972773A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-04-05 1974-10-05 1975-04-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-04-05 1978-10-05 1979-04-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-04-05 1982-10-05 1983-04-06 $7700.00 Window Closed / Lapsed

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