The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 1977
Filed:
Jun. 13, 1975
Ludwik Jachimowicz, Elizabeth, NJ (US);
General Cable Corporation, Greenwich, CT (US);
Abstract
This invention is a cable core made of two layers of helically wound strips of metal with one layer having a right hand lay and the other layer having a left hand lay. The angle of lay is such that the diameter of the core changes at a faster rate than the length of the strips change with differences in temperature. This increase in the change of the core diameter makes the change correspond more closely to that of a plastic jacket or insulation that surround the core and thus avoids excessive stresses in the insulation as it cools and resulting cracking of the insulation in the case of substantial changes in temperature. The angle of lay of one layer is different from that of the other layer so as to set up restraint conditions that provide stability for the composite construction.