Electrical cable having indicating malfunction means therein
AssigneeHazardguard, Inc.
InventorJohn J. Ryeczek
Life of this patent
Estimating the term…
Abstract
An electrical cable includes a central elongated electrical conductor, an electrical insulator concentrically surrounding the electrical conductor, and a heat sensitive reacting material responsive to temperature adjacent the insulator whereby the visually reacting material is activated upon the occurrence of a heat producing malfunction in the cable.
Claims42
An electrical cable comprising a central elongated electrical conductor, an electrical insulator concentrically surrounding said electrical conductor, and a heat sensitive visually reacting material responsive to temperature, whereby the visually reacting material emits light upon the occurrence of a heat producing malfunction in the cable.
An electrical cable comprising an elongated electrical conductor, an electrical insulator at least partially surrounding said electrical conductor, and a heat sensitive visually reacting material responsive to changes in temperature adjacent the insulating means, whereby the visually reacting material emits light and is responsive to at least one change of temperature resulting from a heat producing malfunction in the cable.
An electrical cable comprising a central elongated electrical conductor, an electrical insulator concentrically surrounding said electrical conductor, and a visually reacting material responsive to a change in temperature, whereby the visually reacting material is activated upon the occurrence of a heat producing malfunction in the cable assembly, and wherein a change of appearance of the visually reacting material is changeable on a further change in temperature.
An electrical cable having an elongated electrical conductor, an electrical insulator surrounding said electrical conductor, and a visually reacting material responsive to changes in temperature directly adjacent the electrical insulator, whereby the visually reacting material provides an indication of a malfunction in the cable by a change of appearance resulting from an emission of light.
An electrical cable comprising:
- an elongated electrical conductor;
- an electrical insulator superimposed on and surrounding said elongated electrical conductor;
- a visually reacting thermochromic liquid crystal polymer material superimposed on the elongated electrical conductor, whereby said visually reacting thermochromic liquid crystal polymer material changes appearance by glowing to provide notice of a change of internal temperature of the cable, wherein said change of appearance is reversible on further changes in temperature.
Dependencies are inferred from the claim text.