This invention relates to a tool for securing a tap connector to electrical cables and, more particularly, a tool head for use with a ram tool.
In electrical power systems it is occasionally necessary to tap into an electrical power line. One known system for tapping into an electrical power line is to use a tap connector for electrically connecting a mainline electrical cable to an end of a tap line electrical cable. One such tap connector, referred to as a wedge connector, comprises a conductive C shaped member and a wedge. The two cables are positioned at opposite sides of the C shaped member and the wedge is driven between the two cables. This forces the two cables against the C shaped member.
Wedge connectors are conventionally installed using an explosively driven connecting tool. The C shaped member is held in place on a tool head connected to a cartridge chamber. The cartridge chamber accepts a gun powder shell casing with a specific powder charge that is activated by striking the casing with a hammer. The explosion drives a ram that forces the wedge portion of the connector between the two cables of similar or different sizes. The high velocity of the wedge prevents the cables from “birdcaging”. The cables tend to birdcage if the speed of the ram is slowed down. This can result in the connection not being properly made.
The present invention is intended to solve one or more of the problems discussed above.
In accordance with the invention there is provided a tool for securing a tap connector, the tool including a cable stop for limiting movement of a tap line cable.
Broadly, in accordance with one aspect of the invention there is disclosed a tool head for securing a tap connector having a C shaped member and a wedge using a ram tool. The tool head comprises an elongate base member comprising first and second ends. A collar at the first end of the base member has a through opening for receiving a ram tool, in use. A head at the second end of the base member is aligned with the collar through opening to engage a C shaped member, in use. A cable stop plate is mounted to the head for limiting movement of a tap line cable received in a C shaped member when a ram tool is securing a tap connector.
It is one feature of the invention that the cable stop plate is removably mounted to the head. A screw may removably mount the cable stop plate to the head.
It is another feature of the invention that the base member, the collar and the head are of one piece construction.
It is still another feature of the invention that the cable stop plate includes a counter bore receiving an end of a tap line cable.
It is still another feature of the invention that the cable stop plate is mountable to opposite sides of the head.
There is disclosed in accordance with another aspect of the invention a tool for securing a tap connector having a C shaped member and a wedge. The tool comprises a drive member including a ram. A tool head includes an elongate base member comprising first and second ends. A collar at the first end of the base member is mounted to the drive member. A head at the second end of the base member is aligned with the ram to engage a tap connector, in use. A cable stop plate is mounted to the head for limiting movement of a tap line cable received in a tap connector when the ram is securing a tap connector.
It is a feature of the invention that the drive member comprises a portable tool such as a battery operated tool.
Further features and advantages of the invention will be readily apparent from the specification and from the drawings.
Referring to
The tool 20 includes a drive member 22, including a ram 24, and a tool head 26. The tool head 26 is similar to existing tool heads such as used by various manufacturers for securing tap connectors using an explosion type drive member, as described above. In accordance with the invention, the tool head 26 is adapted to include a cable stop plate 28 secured to the tool head 26 using a thumb bolt 30. The purpose of the cable stop plate 28 is to prevent cable strands from sliding as the wedge is installed into the connector to connect two cables of the same or different sizes together. The wedge is pushed in position by advancement of the ram 24. In accordance with the invention, the drive member 22 comprises a battery operated tool that advances the ram 24 at a relatively low speed, as described more specifically below.
Referring also to
Known tap connectors come in different sizes according to the size of cable to be connected. The tool head 26 shown in
Referring to
As is apparent, the cable stop plates 28 and 128 and associated tool heads 26 and 126 could be used in connection with various drive members. Regardless of the drive member 22, the cable stop plates 28 and 128 prevent cable strands from sliding as a wedge is installed into a connector C shaped member.
Referring to
In accordance with the invention, the tap line electrical cable 92 is inserted into the C shaped member 82 so that a distal end 94 is received in the cable stop plate counter bore 150. The ram 24 is powered by the drive member 22 to slowly advance the ram 24.
The tool head 26 of
In accordance with the invention, the cable stop plates 28, 128 and 228, can be retrofitted to existing tool heads via the respective thumb bolt 30, 130 or 230, or alternatively a pin. Likewise, the tool head can be configured to allow the stop plate to be positioned on either side by combining the features of the tool heads illustrated herein.
This application is a divisional of application Ser. No. 10/386,188, filed Mar. 11, 2003, U.S. Pat. No. 6,895,663.
Number | Name | Date | Kind |
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3212534 | Broske | Oct 1965 | A |
4722189 | Center | Feb 1988 | A |
5337566 | Lomastro et al. | Aug 1994 | A |
5377415 | Gibson | Jan 1995 | A |
5533254 | Gallo et al. | Jul 1996 | A |
5785229 | Franzini | Jul 1998 | A |
6390861 | DeFrance | May 2002 | B1 |
6516523 | Lin | Feb 2003 | B1 |
6895663 | Itrich | May 2005 | B2 |
Number | Date | Country | |
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20050039327 A1 | Feb 2005 | US |
Number | Date | Country | |
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Parent | 10386188 | Mar 2003 | US |
Child | 10952347 | US |