Transformer Bushing Type Or High Voltage Underground Connector Patents (Class 439/921)
  • Patent number: 4857021
    Abstract: An assembly comprising a tap plug having therein an axially fixed nut and including an externally threaded portion threaded into a cable connector lug, a bushing having therein an internally threaded bore, and a stud including an externally threaded first end threaded into the nut, and an externally threaded second end threaded into the bushing bore.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: August 15, 1989
    Assignee: Cooper Power Systems, Inc.
    Inventors: Vincent J. Boliver, Paul M. Roscizewski, Edward L. Sankey, Roy W. DeMeyer
  • Patent number: 4822291
    Abstract: A high voltage insulated bushing module of the gas operated fault closure type for connection with the probe of a mating insulated elbow module is disclosed. The module includes a snuffer tube adapted to perform as a piston within a piston cylinder cut from a length of drawn aluminum tubing. A connector unit mounted on and carried by the tube is provided to conduct load current in series abutting contact with and between the probe and the cylinder. Fault current arcing struck between an incoming probe contact and the tube mounted connector unit generates gas pressure to drive the tube toward the incoming probe, which in turn pulls the connector unit into connection with the probe contact to extinguish the arc. Alternatively, the connector unit is adapted for connection to an elongated, replaceable nut connected directly to the threaded stud of a mating bushing well, thereby rendering all load current conductive components of the bushing insert to be readily replaceable.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: April 18, 1989
    Assignee: Joslyn Corporation
    Inventor: Francis V. Cunningham
  • Patent number: 4820183
    Abstract: A connection mechanism for connecting and disconnecting a cable connector to a bushing mounted on an electrical apparatus comprising a saddle shroud adapted to be connected to the cable connector and having an upwardly extending extension, a plate connected to the electrical apparatus above the bushing for supporting the saddle shroud and for permitting movement of the saddle shroud relative to the bushing, the plate having a slot which receives and supports the saddle shroud extension.
    Type: Grant
    Filed: June 11, 1987
    Date of Patent: April 11, 1989
    Assignee: Cooper Industries
    Inventors: Todd K. Knapp, Harvey W. Mikulecky, Paul R. Reicher
  • Patent number: 4799895
    Abstract: A high-voltage cable is fixed to the single leg of a 600-amp "T" connector, which in turn is coupled for non-removable engagement with an insulating bushing fixed to a wall of the apparatus housing it is to serve. A removable screw-applied link member selectively couples the remaining leg to the apparatus bushing whereby power is supplied to the apparatus only when the link is present and isolates the cable when it is absent. A bushing extender and novel contact extenders fix the positions of components and serve to align the two arms of the link. Each of the arms includes an externally threaded stud for engagement with the contact extenders which are positioned in the "T" leg and bushing extender such as to engage the studs before interface interference to assist and guide the screw assembly of such parts. By this system, the apparatus and cable can be tested, grounded and a visible break performed without moving the high-voltage cable.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: January 24, 1989
    Assignee: Amerace Corporation
    Inventor: Alan D. Borgstrom
  • Patent number: 4787855
    Abstract: An apparatus is provided for grounding power distribution cable so that maintenance can be perfomed on power distribution equipment or the cable. The apparatus has multiple wells, at least two of which are adapted to receive any of several types of conductor bushing inserts to match the cable elbows, while a third receives a load break bushing which is adapted to receive a grounding elbow.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: November 29, 1988
    Assignee: Houston Industries Incorporated
    Inventor: Ronald J. Finke
  • Patent number: 4782197
    Abstract: An electrical bushing for use in connection with an electrical apparatus which includes a replaceable stud connector. The replaceable stud has a pair of axially aligned threaded shanks on each side of a flange. The flange on the replaceable stud engages a flange on an electrical conductor in the bushing when one of the threaded shanks of the replaceable stud is threaded into a threaded bore in the electrical conductor, whereby any breakage of the replaceable stud will tend to occur in the other threaded shank.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: November 1, 1988
    Assignee: Westinghouse Electric Corp.
    Inventors: Joseph M. Stunzi, Donald J. Ristuccia
  • Patent number: 4773872
    Abstract: In a high-voltage bushing insert having a moving, piston-operated, female contact assembly electrically coupled to an interior metallic sleeve by means of a louvered contact ring, the improvement comprising a static metallic contact member providing an alternative electrical path from said female contact assembly to said metallic sleeve. The static contact member is generally circular and substantially closed at a first end and is multiply slotted adjacent its second end to provide a series of bulbous, spring fingers thereat. The spring fingers making intimate electrical contact with the interior of the female contact assembly in its static position and for a portion of its travel away from the closed end of the metallic sleeve. An exterior ring at the contact's first end assures good electrical contact with the metallic sleeve.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: September 27, 1988
    Assignee: Amerace Corporation
    Inventors: Alan D. Borgstrom, Frank M. Stepniak
  • Patent number: 4722694
    Abstract: A connector for electrically connecting a high voltage cable to an electrical apparatus bushing with a threaded opening, the connector comprising a housing having a passage having one end formed to sealingly engage the bushing, and an electrically conductive cable connecting element positioned in the housing and extending partially into the first passage. The cable connecting element is adapted to be electrically connected to the high voltage cable. The connector also includes a bushing connecting member mounted in the passage and adapted to be rotated. The connecting member includes a body portion electrically connected to the cable connecting element, and a threaded portion connected to the body portion and adapted to engage the threaded opening in the bushing.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: February 2, 1988
    Assignee: RTE Corporation
    Inventors: John M. Makal, Randall R. Schoenwetter