Closure for aerial telephone cable splices

• US 4,818,824 A
• Filed: 08/19/1987
• Issued: 04/04/1989
• Est. Priority Date: 08/19/1987
• Status: Expired due to Term

• Current Assignee: Avaya Technology Corporation Miami Lakes FLA US
• Original Assignee: American Telephone & Telegraph Company (AT&T, Inc.)
• Inventors: Tanzola, Charles, Dixit, Mayankkumar M.
• Primary Examiner(s): Askin, Laramie E.
• Application Number:
  US07/087,122
• Time in Patent Office: 594 Days
• Field of Search: 174/41, 174/76, 174/92, 174/138 D, 24/1, 24/102 A, 24/102 P, 24/107, 24/297, 24/453, 24/618, 24/662, 24/704, 138/158, 138/159, 138/160, 292/327, 403/408.1, 411/2, 411/500, 411/508, 411/509, 411/510, 411/548, 411/904, 411/907, 411/908, 411/910
• US Class Current: 174/92
• CPC Class Codes: H02G 15/117 for multiconductor cables
• CPC Class Codes: Y10S 411/907 Elastomeric
• CPC Class Codes: Y10S 411/91 Antitamper means
• CPC Class Codes: Y10T 24/42 Independent, headed, aperture pass-through fastener
• CPC Class Codes: Y10T 24/45545 forming total external surface of projection
• CPC Class Codes: Y10T 24/50 Readily interlocking, two-part fastener requiring either destructive or tool disengagement
• CPC Class Codes: Y10T 292/51 Seal bolts
• CPC Class Codes: Y10T 403/75 having a joining piece extending through aligned openings in plural members

Abstract

Splices between conductors in of an aerial telephone cable are covered by a closure located within a terminal. The closure has a large central section connected via tapered joints to two end sections. A settable liquid encapsulant is received in the central section. The closure has two halves joined by a flexible hinge that runs lengthwise along a first longitudinal edge. Two rigid tabs of nonuniform thickness running lengthwise along a second longitudinal edge are secured by snaps through apertures in the tabs. The snaps have tapered sections that clamp the varying thickness rigid tabs along their lengths to prevent leakage of liquid encapsulant. The end sections have open cell foam strips fitting snugly between the cable and the end section walls which are fixed with the liquid encapsulant. The encapsulant sets within the open cell foam to form a barrier to passage of contaminants into the central section.

Claims

1. Apparatus enclosing splices in a cable comprising:

a body shaped to form a longitudinal cavity enclosing the splices including a first half and a second half,

each body half having a first longitudinal edge and a second longitudinal edge,

the first longitudinal edges of said first and second halves being joined along their lengths;

a tab member of nonuniform thickness formed along the second longitudinal edge of each of said first and second halves, the tab members of nonuniform thickness including a plurality of substantially aligned apertures, and

means for securing the nonuniform thickness tab member along the second longitudinal edge of the first half to the nonuniform thickness tab member along the second longitudinal edge of the second half through said apertures in clamped relationship,

said securing means including a device for penetrating through each aperture comprising

a cylindrical section of a first diameter exceeding the aperture diameter with an end for contacting the tab member of the second longitudinal edge of the first half and a tapered section axially aligned with said cylindrical section having one end of a diameter smaller than the aperture diameter facing the first diameter cylindrical section and another end having a diameter exceeding the aperture diameter defining a predetermined taper angle, said tapered section being axially located to contact the tab member of the second longitudinal edge of the second half all along the periphery of the aperture at the predetermined angle of taper to urge the tab members of the second longitudinal edges of the first and second halves into tight contact.

2. Apparatus enclosing splices in a cable according to claim 1 wherein said body comprises a central section intermediate a first end section and a second end section for said cable to enter the central section,

a foam strip surrounding said cable within each end section of the body,

an aperture in one of the central sections of the first and second body halves for receiving a settable liquid encapsulant to fill said central section,

a settable liquid encapsulant filling the interior of the central section and being contained within the central section by the second longitudinal edge tab members held in said tight contact by a plurality of said securing means devices

and said foam strips surrounding the cable at said first and second end sections.

3. Apparatus enclosing splices in a cable according to claim 1 wherein the device penetrating through each aperture breaks responsive to the tab members of nonuniform thickness being pried apart using a force greater than exerted by the tapered section urging the tab members of the second longitudinal edges of the first and second halves into tight contact.

4. Apparatus enclosing splices in a cable according to claim 1 wherein the tapered section of the device penetrating through each aperture comprises a front portion facing said first diameter cylindrical section having a first taper and a rear portion having a second taper, the angle of taper of the front portion being selected to urge the tab members of the second longitudinal edges of the first and second halves into tight contact over a prescribed range of tab thickness and the angle of taper of the rear portion being selected to urge the tab members of the second longitudinal edges of the first and second halves into tight contact over a range of tab thickness greater than said prescribed range.

5. Apparatus enclosing splices in a cable according to claim 4 wherein said device penetrating through each aperture further comprises a second diameter cylindrical section joined between and in axial alignment with the front portion of the tapered section and the first diameter cylindrical section, said second diameter cylindrical section having a diameter smaller than the aperture diameter.

6. Apparatus enclosing splices in a cable according to claim 5 wherein said device penetrating through each aperture further comprises a third diameter cylindrical section joined to and in axial alignment with the rear portion of the tapered section, the diameter of said third diameter cylindrical section being greater than the aperture diameter.

7. Apparatus enclosing splices in a cable according to claim 6 wherein said second diameter cylindrical section comprises a grooved portion having a diameter less than said second diameter, said grooved portion breaking responsive to the tab members of nonuniform thickness being pried apart using a force greater than exerted by the tapered section urging the tab members of the second longitudinal edges of the first and second halves into tight contact.

8. Apparatus enclosing splices in a cable according to claim 1 wherein said tapered section comprises a grooved portion located between the portion of the tapered section contacting the tab and the first diameter cylindrical section, said grooved portion having a diameter less than the portion of the tapered section whereat it is provided, so as to break responsive to the tab members of nonuniform thickness being pried apart using a force greater than

exerted by the tapered section urging the tab members of the second longitudinal edges of the first and second halves into tight contact.