US1021453A - Terminal structure. - Google Patents

Description

V c. w. DAVIS.

TERMINAL STRUCTURE. APPLICATION FILED JULY 1, 1909.

1,021,453. Pten tedMar. 26, 1912.

IIIIIIIII IIWIA WITNESSES! INVENTOR A; a w w' UNITED STATES PATENT cur os.

CHARLES W. DAVIS, OF EDGEWGRTE, IWNSYLVANIA, ASSIGNOR TQ STANDARD- UNDEB G-ROUND CABLE COMI'ABTY, GF'QITTSBURGH, ?ENNSY LVANIA, A CORPOBA- v 'IION OF PENNSYLVANIA To all wli'om e't may concern:

Be itknown that I, CHAnLns W. DAVIS, residing at Edgeworth, in the county of Alleghen and State of Pennsylvania, a

5 citizen 0 the United States, have'invented or discovered certain new and useful improvements in Terminal Structures, of which improvements the following is a specification, a

My invention: relates to improvements in the construction of terminals for metalsheathed electrical cables, and its object is simplicity df strueture,'thoroughness of insulation, and simplicity in assembling.

The'accompanying drawing whibh' forms part of this specification shows in vertical section a terminal structure embodying my present invention.

The invention is peculiarly applicable to,

' although not necessarily limited to, use in the installation of high voltage installations. v h A The terminal t-ructure in which my 1nvention resides consists "essentially of a case or shell 1, formed preferably entirely of in sulating material. shell is perforate from end to end, its inner bore preferably enlarging from the end which receivesthe metal sheathed cable-to a larger chamber, indicated in the drawings at 2. Externally, this sleeve-like body is provided with one or more petticoats 3, formed preferably of insulating material. It is closed at the end opposite to that 'at which "thecable is introduced by a cap formed preferably of insulating material, and preferably extending beyond the body of the casing 1, to form anotl. r etticoat 5. The opposite end of this casing 1, that is the 40 end into which the metal-sheathed cable is to be introduced, is provided, with means for making secure connection with the metallic.

cable sheath at a point adjacent to the entrance of the cable into the perforation in the casing. To this end, a screw thread 6 may be formed upon the outer surface of easing 1 adjacent to the extremity thereof, such screw thread being conveniently :formed in a metallic sleeve within which the body of the casing is molded, or which is otherwise secured thereon by a tight joint. Engaging the casing l at this point,

as by a corresponding screw thread, is a metallic thimble 7, which when inplace protrudes from the end of the casing l, and

menstrual, sunscreen.

Specification of Lcttersfatent. Application filed Inly 1, 19%. Serial 30. 505,381;

In form this case or upon which secure and rigid joint may be made to the cable sheath, as'by a wipedsolder joint indicated. at 8.

Patented Mar. 26,1912.

The structure thus described is arranged to be installed in vertical position, and preferably-the cable will be led in at the lower end, the cap 4 forming the upper end of the structure. In such an arrangement, 'thepetticoat projections 3 and 5 which have been described extend downwardly as well as outwardly, so that when exposed to the weather the nether surface of each petticoat will afiorda dry and leakage-preventing cable shown is a three-strand cable, and

each strand is led out separately, each through a lateral hole in the wall of the casing arranged each beneath a different one of the petticoats specified. It will be seen that each lead-out is thus protected by a petticoat with its dry leakage-preventing surface. 1 a

The lead-out conductors 10 may convene iently be of rubber-covered wire engaging the exposed cable conductors within the enlarged chamber of easing 1, the particular form of joint forming no part of my present invention, but being of any form preferred and known to the art. The rubber-covered lead-out wire will fit snugly within the orilice through which it is passed; and, to

- make a weather-tight joint, before the cover 4: is applied, the space within the terminal structure may be filled with an insulating substanceapplied in liquid form. hen the connections have been made'and the space within the structure thus filled, the applica ticn of the cover plate it closes in the whole and rnalres a complete weather-resisting structure,

In my Patent No. 898,097 I have shown a terminal structure which has certain fea- 'tures of resemblance to this; notably in haw ing a series of petticoais one above the other,

heneath each of which a conductor is led out, but it will be observed on referring to that patent that in it the conductors are molded in theiinsulating material which forms thealso serves as' aleakage-preventing device between the leads-out and the metallic cable sheath.

I claim herein -as my invention:

1. A terminalstructure for metal-sheathed cables which consists of abody portion of substantially cylindrical form With an axial opening through it from end to encl, means for securing" rigidly. and hermetically a cable introducedintoone end thereof to said body portion, a cap closing said axial opening at the opposite end thereof, said cap provided I with a petticoat extending beyond the walls of the said body portion, and an orifice,

formed in the ivall of thebody portion heneaththe Protection of the petticoat formed upon said cap, substantially asdescrihed '2. A three-piece terminal for an electric cable, consisting of a casing, a thiinble, and a cap, said casing being of substantially cylindric'al form with an axial opening through it from end to endand said casingformed of insulating-material integral and homogeneous throughout, externally petticoated, and provided with two lead out orifices giving communication within the said axial opening and arranged upon opposite sides of such external petticoat, sa d. "thimble bein'g adapted to be connected hermetically to a cable sheath and closing at one end the axial opening through said casing, and said cap closing atits opposiie end the axial. opeiiing through said. casing, substantially as described. 1 i

In testimony whereof, l have hewonto set my hand. Y

CHA. RLES W. DAV 1S.

Witnesses CHARLES BARNETT, Tnnoooian

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