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Karl Pfisterer Elektrotechnische

Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co. Kg

Max Hockele

Werner H Muller

Karl Beham

Helmut Ruff

Wolfgang G Torpe

A device for providing a high tensile, electrically insulated connection ween two sections of the lead wire of an overhead power line is disclosed. The device is suitable for use as a line separator or phase separator of a lead wire which supplies power to the current collector of a railway vehicle. The device comprises spaced parallel, glass-fiber reinforced plastic insulating rods, each of the ends of which are connected with metal rods of the same outside diameter, and which are arranged in a common plane with the lead wire sections. Two tubular traverses extend transversely to the insulating rods and are rigidly connected to the metal rods at the ends of the insulating rods. A cable system is provided for suspending the device from a support cable. Also disclosed is a method of connecting the plastic rods with the metal rods to form high tensile connections, the metal rods having an axial clamping channel and the method including progressive radial compression of the metal rods about the plastic rods.

Method of making a high tensile connection for overhead power lines

Phase break-section insulator devices for trolley contact wires of an overhead electrified railroad include parallel insulating rods joined up at their ends with two light weight crosspieces at each end. The rods have a glass fiber center surrounded by a tube of polytetrafluoroethylene, and this tube has grooves therein to prevent spread of moisture and dirt along the rod. Each rod end is joined to a metal sleeve, in turn joined to one of the end crosspieces. A contact wire clamp is secured between the two crosspieces at each end. A separate contact wire clamp adjacent each end of the device has current collector guides attached and extending along the device on opposite sides and also attached to the ends of the crosspieces. The crosspieces have openings for the contact wire and insulating rods to allow installation and adjustment of the device on the contact wire before this wire is cut. Similar crosspieces and guides may be used in the center section of a phase break. Supporting bars with weight reducing holes (as the guides also have) are attached to crosspieces for suspension of the device. Various guide, horn and arc extinguisher configurations are provided. Overlapping guides may be provided to provide no interruption of power when a current collector passes through a section insulator. Grooves may be provided all across insulating rods normally contacted by a current collector by adding an auxiliary current collector riding surface attached to the rods. Identical section insulator modules may be connected together by a grounded or ungrounded contact wire to provide a phase break.

Phase break-section insulator devices of high tensile strength

This disclosure relates to a method and apparatus for clamping electrical conductors, such as cables. The conductors are placed in clamping channels formed in a clamp body having at least two separate body parts. The channels have a cross-sectional shape deviating from the circular shape of the conductors. When the clamp is pressed together by means of a pressing tool, the body parts bend elastically about the conductors, while the conductor metal deforms to the shape of the clamping channels. The clamp is then secured by at least one screw of required tensile strength sufficient only to absorb the elastic forces of the deformed body parts and conductors.

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Berglen-Steinach, Germany

Max Hockele