US3862791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminal pin block and method of making it
Assignee: Nortel Networks Ltd
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Filing: 1973-06-13
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Granted: 1975-01-28
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Expires: 1993-06-13
Abstract
Abstract A terminal pin block is produced by perforating a board of thermoplastic foam having a predetermined size and density with a plurality of holes having a cross-sectional area such that at least a small amount of force is required to insert conductive pins therein. Preferably the pins are provided with at least one transverse surface irregularity in the area which is inserted into the board. The end portions of the pins are then heated to cause the thermoplastic foam adjacent the pins to soften and flow about the pins and into the surface irregularity whereby on cooling, the pins are held securely in the board.
Inventors
- 👤 Hugh Laurence Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/40; H01R13/405; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49147; Y10T29/49151; Y10T29/49153; Y10T29/49194
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A method of making a terminal pin block comprising the steps of: perforating a board of rigid thermoplastic foam with a plurality of holes in a predetermined pattern, said perforating being done with a displacement punch, whereby as the punch progresses through the board, the thermoplastic foam is displaced laterally away from it thereby causing the density of the foam lining the holes to be greater than the density of the foam of the remainder of the board; inserting a plurality of conductive pins through said holes; heating the pins to a temperature adequate to cause the thermoplastic foam adjacent the pins to soften and flow about the pins; and cooling the pins, whereby the softened plastic is allowed to harden thereby causing the pins to be securely held in the board.
Claim 2
Independent Claim
132 words
A method of making a terminal pin block comprising the steps of: perforating a board of rigid thermoplastic foam with a plurality of holes in a predetermined pattern, said perforating being done with a displacement punch, whereby as the punch progresses through the board, the thermoplastic foam is displaced laterally away from it thereby causing the density of the foam lining the holes to be greater than the density of the foam of the remainder of the board; inserting a plurality of conductive pins through said holes; heating the pins to a temperature adequate to cause the thermoplastic foam adjacent the pins to soften and flow about the pins; and cooling the pins, whereby the softened plastic is allowed to harden thereby causing the pins to be securely held in the board.
Claim 3
Dependent Claim
35 words
A method as defined in claim 1 wherein the heating of the pins is done by immersing one end portion thereof for a predetermined period of time in a bath heated to a predetermined temperature.
Claim 4
Dependent Claim
29 words
A method as defined in claim 2 wherein the bath contains a material selected from the group of molten solder, molten lead, molten zinc alloy, sand, and iron filings.
Claim 5
Dependent Claim
35 words
A method as defined in claim 3 comprising the further step of coating said end portion of the pins with a substance for preventing the hot bach material from adhering thereto, before they are immersed.
References Cited (Backward Citations)
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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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |