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US3636238A Expired / Lapsed US ⏱️ 0.0 years remaining

Solderless connector for insulated electrical conductors

Assignee: Siemens AG
•
Filing: 1970-06-25
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Granted: 1972-01-18
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Expires: 1990-06-25
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Abstract

Abstract Solderless connector for electrically connecting the conducting cores of insulated electrical conductors, and particularly the plastic-insulated conductors of telephone cables. The connector includes a conical contact pin having a series of sharp edge contact points in the form of annular ridges spaced along and projecting from the periphery of the pin. A cylindrical shell having a closed end and an open end, extends about the contact pin. The contact pin abuts the closed end of the shell and tapers toward the open end of the shell. The shell is made from a polymerized plastic material which shrinks under the influence of heat and sets to its shrunk condition as it cools. The open end of the shell has an inturned lip containing a plastic ring to the interior open end portion of the shell, which melts as it is heated. A series of insulated conductors are inserted into the shell. As the shell is heated it will shrink and engage the conductors with the sharp-edged contact points of the contact pin with sufficient force to force the contact points or ridges through the insulation into contact with the conducting cores of the conductors. The plastic ring at the same time will melt as the shell is heated and seal the conductors to the shell.

Inventors

  • 👤 Erwin Biebach

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 09:08
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/70; H01R4/72; H01R4/726; Y; Y10; Y10S; Y10S174/00; Y10S174/08

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 156 words
A solderless connector for insulated electrical conductors and particularly the plastic-insulated conductors of telephone cables comprising a generally cylindrical shell made from a heatshrinkable plastic material, settable to its shrink form when cool and having, at least one open end, a contact pin contained within said shell and extending concentrically of and spaced from the interior wall of the shell and having a plurality of sharp contact cutting edges Extending from its external periphery and spaced radially inwardly from the interior wall of the shell, said shell adapted to exert radially inward force on the insulated conductors disposed between said pin and said shell when shell is heated and shrunk and pressing the conductors against said contact cutting edges with said contact cutting edges cutting through the insulation of the conductors and making a good electrical connection with the conducting cores of said conductors and retaining said conducting cores into engagement with said contact cutting edges.
Claim 2
Dependent Claim 156 words
A solderless connector for insulated electrical conductors and particularly the plastic-insulated conductors of telephone cables comprising a generally cylindrical shell made from a heatshrinkable plastic material, settable to its shrink form when cool and having, at least one open end, a contact pin contained within said shell and extending concentrically of and spaced from the interior wall of the shell and having a plurality of sharp contact cutting edges Extending from its external periphery and spaced radially inwardly from the interior wall of the shell, said shell adapted to exert radially inward force on the insulated conductors disposed between said pin and said shell when shell is heated and shrunk and pressing the conductors against said contact cutting edges with said contact cutting edges cutting through the insulation of the conductors and making a good electrical connection with the conducting cores of said conductors and retaining said conducting cores into engagement with said contact cutting edges.
Claim 3
Dependent Claim 60 words
The solderless connector of claim 1, wherein the shell is generally cylindrical in form, the contact pin is generally conical and has a converging end facing the open end of the shell, and the shell is adapted to shrink and generally conform to the form of said contact pin and maintain the general form of said contact pin when shrunk.
Claim 4
Dependent Claim 58 words
The solderless connector in claim 2, wherein the shell has one closed end and an opposite inturned end terminating into an opening smaller than the larger outer diameter of the contact pin, to retain said contact pin to said shell and accommodate the insertion of electrical conductors along said contact pin through the open end of said shell.
Claim 5
Dependent Claim 26 words
The solderless connector of claim 3, wherein the sharp contact cutting edges are in the form of parallel sharp annular ridges spaced along said contact pin.
Claim 6
Dependent Claim 45 words
The solderless connector of claim 4, wherein a sealing ring extends within the open end of the shell along the inturned end thereof and is adapted to melt to seal the open end of the shell and conductors extending thereinto when said shell is shrunk.
Claim 7
Dependent Claim 33 words
The solderless connector of claim 2, wherein the sharp contact cutting edges are in the form of a plurality of parallel spaced sharp annular ridges spaced along said contact pin and extending thereabout.
Claim 8
Dependent Claim 45 words
The solderless connector of claim 6, wherein a plastic sealing ring extends within the open end of the shell and radially inwardly from the interior wall thereof and is adapted to melt to seal the conductors to said connector when the shell is permanently shrunk.

References Cited (Backward Citations)

US3243211A Cited
US3320355A Cited
US3480723A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-01-17 1975-07-19 1976-01-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-01-17 1979-07-19 1980-01-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-01-17 1983-07-19 1984-01-18 $7700.00 Window Closed / Lapsed

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