Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft

Kabel-und Metallwerke Gutehoffnungshuette Ag

Ottmar Leuchs

Otto Uhlmann

Georg Maltz

Hans-Jurgen Kloppner

Extruded, drawn and coiled copper tubing with wall thickness of 0.7 to 2 mm is soft annealed, straightened and jacketed in an extruder with a blend of polyvinyl chloride, chalk, a plasticizer and other additives for lubrication and stabilization. The jacket has inwardly extending ribs defining channels inbetween to enhance heat insulation.

Method of continuously making flexible, heat insulated metal tubing

An insulated cable has a hermetically enclosed sheath. Between the sheath and the insulation of the cable is a filler of a thermoplastic material. When the cable is heated (e.g. a localized fire) gases and acids that are given off by the insulation are absorbed by the filler which also expands resulting in a structural blockage to the longitudinal flow of the acids and gases.

Fire resistant electrical cables

A polymeric composition having a polymer content which tends to evolve deleterious acid compounds upon being subjected to elevated temperatues; the composition including selected particle matter which is present in an amount to combine with or otherwise neutralize essentially the entire evolved deleterious compound when the composition is subjected to elevated temperatures; the composition with or without plasticizers being useful as insulation or jacketings for electric wire and cable, as well as diverse molded or extruded products, including disposable items such as packaging or the like.

Electrical conductor having inhibited polymer compositions

A polymeric composition having a polymer content which tends to evolve deleterious acid compounds upon being subjected to elevated temperatures; the composition including selected particle matter which is present in an amount to combine with or otherwise neutralize essentially the entire evolved deleterious compound when the composition is subjected to elevated temperatures; the composition with or without plasticizers being useful as insulation or jacketings for electric wire and cable, as well as diverse molded or extruded products, including disposable items such as packaging or the like.

Growing community of inventors

Hannover-Bothfeld, Germany

Ottmar Leuchs