Electricity: conductors and insulators – Conduits – cables or conductors – Combined
Patent
1981-07-07
1983-06-07
Askin, Laramie E.
Electricity: conductors and insulators
Conduits, cables or conductors
Combined
174 77R, H02G 1518, H02G 15113
Patent
active
043872689
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a sleeve to protect the splice in electric or telephone cables.
In French Patent application Ser. No. 79 12 989 lodged on May 22, 1979 on behalf of the Applicant, a sleeve of this type was described. This sleeve is made up of two half-shells joined together at their adjacent edges by means of a clamping screw, and enclosing the splice made between two cables, in particular telephone cables. The adjacent edges of these half-shells are provided with a groove defining a duct when these half-shells are joined together, devices being provided for injecting a pasty material into this duct, making it possible to secure watertightness between the joined edges of the two half-shells. This pasty material thus prevents dampness from penetrating inside the sleeve. This pasty material can for example be an electrically insulating grease.
The opposite ends of this sleeve are provided with jaws to fasten the ends of the cables axially in the sleeve. These jaws are made up of two jaw elements tightened onto one another around the cable by means of the clamping screw. On the other hand, the joined ends of the two half-shells define a ring-shaped chamber surrounding the cable, which connects with the duct arranged between the joined edges of the half-shells. Thus the grease injected into this duct penetrates into the above-mentioned ring-shaped chamber, which makes it possible for watertightness between the cables and the opposite ends of the sleeve to be secured.
The advantages of such a sleeve lie in the fact that it can be made watertight with a relatively small amount of grease or similar pasty material. Also, the use of a grease for creating this water-tightness makes it possible to dismantle the sleeve easily, without there being any need to destroy it, so that it can be used again after dismantling.
The aim of the present invention is to create a protective sleeve for splicing electric cables, in particular telephone cables, in which watertightness and ease of assembly around the cables are substantially improved in relation to the above-mentioned sleeve.
According to the invention, this sleeve is characterised by the fact that its ends are provided with at least two detachable jaws defining between them a chamber connected with the duct for introduction of the pasty material.
In the position in which the sleeve is assembled around the cables, these two jaws bear on these cables while defining a chamber which is substantially closed. When the pasty material is injected the latter fills this chamber thus securing the watertightness required between the sleeve and the cables. Simultaneously these jaws secure the cables axially to the opposite ends of the sleeve.
Assembling such a sleeve around the splice made between the cables is particularly easy and excellent watertightness is obtained.
According to an advantageous version of the invention, the two half-shells of the sleeve are joined onto one another by means of a clamping screw and the two jaws are of such measurements as to be able to bear on the corresponding cable, when the screws connecting the two half-shells are tightened.
This arrangement makes it possible to do without any separate ancillary tightening device for the jaws, which considerably simplifies assembly of the sleeve around the cables.
According to a preferred version of the invention, an elastomer-based adhesive band is rolled around the ends of the cables, the above-mentioned two jaws being designed to rest on this adhesive band, when the half-shells are joined onto one another.
This extra thick adhesive band on the cables makes it possible to make a watertight joint between the cables and the jaws. The chamber defined between the two jaws in a clamped position on the cable is, owing to this, substantially watertight due to the above-mentioned watertight joint, which makes it possible for the pasty material to be injected under relatively high pressure, which contributes to obtaining excellent watertightness.
Preferably the jaws are secured in a detachable manner an
REFERENCES:
patent: 2771502 (1956-11-01), King
patent: 2788385 (1957-04-01), Doering
patent: 3715459 (1973-02-01), Hoffman
patent: 3775204 (1973-11-01), Thompson et al.
patent: 3848074 (1974-11-01), Channell
patent: 3861422 (1975-01-01), Christie
patent: 3992569 (1976-11-01), Hankins et al.
Morel Andre
Morel Jacques
Askin Laramie E.
Etablissements Morel - Ateliers Electromecaniques de Favieres
Tone D. A.
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