Test enabling terminal enclosure apparatus and method

• US 5,149,281 A
• Filed: 09/24/1991
• Issued: 09/22/1992
• Est. Priority Date: 09/24/1991
• Status: Expired due to Fees

• Current Assignee: Teltronics, Inc. (MedTel Services LLC)
• Original Assignee: Teltronics, Inc. (MedTel Services LLC)
• Inventors: Hills, Vicki L., Hills, Gerritt G.
• Primary Examiner(s): Schwartz, Larry I.
• Assistant Examiner(s): NGUYEN, KHIEM M
• Application Number:
  US07/764,542
• Time in Patent Office: 364 Days
• Field of Search: 439/519, 439/521, 439/522, 439/523, 439/426, 439/912, 439/921, 439/936, 174/76, 174/138 F
• US Class Current: 439/521
• CPC Class Codes: G01R 1/04 Housings; Supporting members; Arrangements of terminals
• CPC Class Codes: H01R 13/5216 characterised by the sealing material, e.g. gels or resins
• CPC Class Codes: H01R 4/70 Insulation of connections end caps H01R4/22
• CPC Class Codes: Y10S 439/912 with testing means
• CPC Class Codes: Y10S 439/936 Potting material or coating, e.g. grease, insulative coating, sealant or, adhesive

Abstract

A gel-filled enclosure for protecting an electrical contact member and connection includes an enclosure opening arrangement through which an elongated probe may be inserted into the gel-filled enclosure cavity. The enclosure opening allows a probe to be inserted into the enclosure cavity to make contact with the protected electrical contact member without having to remove and replace the enclosure. The gel within the enclosure is self-healing and fills in the opening made by the probe after the probe is withdrawn. The enclosure preferably includes a contact member receiving arrangement within the enclosure body that includes a contact member receiving tube and a plurality of thread-engaging ribs positioned in the tube. Each rib is formed from a self-threading plastic material and self-threads as the enclosure is screwed down over a threaded contact member.

Claims

1. An enclosure for protecting an electrical contact member, the enclosure comprising:

(a) an elongated enclosure body defining an enclosure cavity and having a contact member receiving end with a contact member receiving opening therein;

(b) contact member receiving means connected to the enclosure body and positioned within the enclosure cavity for receiving the contact member in a contact member receiving area and retaining the enclosure body in a contact member protecting position substantially covering the contact member;

(c) a self-healing encapsulant substantially filling the enclosure cavity; and

(d) enclosure opening means for providing an opening in the enclosure body through which an elongated probe may be inserted into the enclose cavity to make contact with the contact member when the contact member is received therein, the enclosure opening means being formed in the enclosure body in an area removed from the contact member receiving end and spaced from the contact member receiving area so that an interval of the encapsulant separates the enclosure opening means from the contact member receiving area.

2. The apparatus of claim 1 wherein the self-healing encapsulant comprises:

(a) a silicone gel having a cone penetration value of below 90 10^-1 mm.

3. The apparatus of claim 1 wherein the contact member is elongated and threaded and the contact member receiving means comprises:

(a) an elongated tube mounted substantially coaxially within the elongated enclosure body and having a tube opening at the end of the tube nearest to the contact member receiving end of the enclosure body; and

(b) a plurality of elongated thread-engaging ribs extending longitudinally within the tube, each rib being formed from a self-threading plastic material and having one transverse end connected to an inner surface of the tube and the opposite transverse end extending radially inwardly toward the tube longitudinal axis.

4. The apparatus of claim 1 wherein the enclosure opening means comprises:

(a) a probe receiving opening formed in the enclosure body.

5. The apparatus of claim 1 wherein the enclosure opening means comprises:

(a) a reduced-thickness and readily puncturable area of material formed in the enclosure body.

6. The apparatus of claim 1 wherein the enclosure opening means comprises:

(a) a plurality of elongated and readily tearable reduced-thickness slits formed in the enclosure body material, the elongated slits intersecting at a center point to form therebetween a series of pie-slice shaped sections.

7. The apparatus of claim 1 wherein the enclosure opening means is positioned at an end of the enclosure body opposite to the contact member receiving end and enables the elongated probe to be inserted into the contact member receiving area.

8. In an encapsulant-filled cap for use in protecting an exposed end of an electrical contact member, the cap having a cap body substantially filled with a self-healing dielectric encapsulant, a contact member receiving opening, and contact member receiving means mounted within the cap body for receiving the contact member in a contact member receiving area and securing the cap in a protecting position in which it substantially covers the contact member, the improvement comprising:

(a) cap opening means formed in the cap body separate from the contact member receiving opening so that a layer of the encapsulant is interposed between the cap opening means and the contact member receiving area, the cap opening means for enabling an elongated probe to be inserted therethrough to penetrate through the encapsulant and make electrical contact with the contact member when the contact member is received in the contact receiving means.

9. The apparatus of claim 8 wherein the cap opening means comprises:

(a) a probe receiving opening.

10. The apparatus of claim 8 wherein the cap opening means comprises:

(a) a reduced-thickness and readily puncturable area of material formed in the cap body.

11. The apparatus of claim 8 wherein the enclosure opening means comprises:

(a) a plurality of elongated and readily tearable reduced-thickness slits formed in the cap body, the slits intersecting at a center point to form therebetween a series of pie-slice shaped sections.

12. The apparatus of claim 8 wherein the encapsulant in the cap comprises:

(a) a silicone gel having a cone penetration value of below 90 10^-1 mm.

13. The encapsulant-filled cap of claim 8 wherein:

(a) the cap opening means is also for contacting the elongated probe to prevent removal of encapsulant as the probe is retracted from the cap through the cap opening means.

14. A method of providing an electrically insulated protecting enclosure for an elongated electrical contact member while allowing the enclosed electrical contact member to be contact tested without removing the enclosure, the method comprising the steps of:

(a) substantially filling an enclosure cavity of an elongated enclosure body with a self-healing silicone gel having a cone penetration value of under 90 10^-1 mm, the enclosure body having a contact member receiving end with a contact member receiving opening formed therethrough and enclosure opening means formed separately from the contact member receiving opening; and

(b) securing the gel-filled enclosure body over the contact member with the contact member extending through the contact member receiving opening and with a portion of the contact member separated from the enclosure opening means by only the self-healing silicone gel.