General Electric Company

Vulkor Incorporated

Milton S Greenhalgh

Ray Clarence Lever

Joseph E Vostovich

A novel curable rubber composition is described which is curable at low temperatures.

Low temperature curing of elastomer

An over temperature sensing system is disclosed that is designed to monitor the temperature in a single or multiwire conductor. The system may be utilized in control cables or in high tension power distribution cables.

Over temperature sensing system for power cables

There is disclosed a smoke and/or heat detection apparatus including smoke and/or fire detectors, wire conductors embedded in a coextensive body of thermoplastic material and signal and actuating means.

Smoke and/or heat detection apparatus containing thermal-sensitive

Novel acrylonitrile butadiene and carboxylated acrylonitrile butadiene elastomeric admixtures compounded with various amounts of mineral fillers such as silicates, silicas, etc., carbon blacks, and plasticizers such as esters, epoxidized polyesters, etc., are useful as continuous temperature-sensitive solids when applied to metallic conductors as coatings whereby one leg acts as a conductor and the other is used as the sensing leg. These electrical properties of these admixtures such as volume resistivity, impedance, and reactance are uniquely sensitive to temperature changes from room temperature to at least 90.degree. C. and thus offer new and important circuit design opportunities for monitoring and detecting temperature changes. These admixtures which are essentially thermosetting may be combined with other resins such as polyvinyl chloride and used thermoplastically. In these cases, the elastomer becomes the plasticizer.

Thermal-sensitive insulating composition comprising cured acrylonitrile

Thermal-sensitive insulating composition and method, and article and

Electric hot-spot detection apparatus and electric heating apparatus

A method of continuously and rapidly effecting a heat induced cure in curable polymeric compositions, such as by cross-linking or vulcanization, by means of directly contacting a surface of the heat curable polymeric composition with a stream of hot gas traveling at very high velocities, and under elevated pressures.

Method of thermally curing polymeric materials

An apparatus for the continuous extrusion molding of a curable polymeric material about an elongated conductor. The apparatus includes electrical induction heating means for the precise and isolated application of heat to a limited portion of a progressively advancing mass of curable polymeric material immediately prior to its continuous entry into and passage through a forming die and its molding therein to shape.

Apparatus for the manufacture of an electrical conductor covered with a

A process of increasing the output and other efficiencies and benefits in continuous extrusion manufacturing operations, including blending and plasticizing, molding to shape and curing heat curable polymeric compounds to a thermostat condition. The process comprises the continuous coincidental mixing and heating of heat curable polymeric compounds, raising the temperature thereof up to substantially the level of their curing temperatures, and the consecutive forming to shape and curing of the shaped polymeric compounds to a thermostat condition. The process is primarily carried out within an extruder or equivalent continuous forming apparatus, and any additional heat needed to achieve or accelerate the attainment of curing temperatures, or to complete the conversion to a cured thermoset condition of the polymeric compounds can be readily applied by any external source of heat. This process is especially suitable and effective in the manufacture of elongated electrical conductors or wires coated or insulated with thermosetting polymeric materials or compositions comprising the same. The invention also includes a novel apparatus for the effective and complete performance of the process.

Growing community of inventors

Fairfield, CT, United States of America

Milton S Greenhalgh