Patent ID: 7053748
Filing Date: 2006-05-30
Classification: H01C

Abstract:
1. A composite circuit protection device comprising (A) a laminar insulating member; (B) a first laminar circuit protection device; and (C) a second laminar circuit protection device; each of the first and second laminar circuit protection devices comprising (1) a first laminar electrode; (2) a second laminar electrode; (3) a laminar PTC resistive element which (i) exhibits PTC behavior, (ii) has a first face to which the first electrode is secured and an opposite second face to which the second electrode is secured, (iii) defines first and second apertures which run between the first and second faces, and (iv) is composed of a PTC conductive polymer; (4) a third laminar conductive member which (i) is secured to the second face of the PTC resistive element in the area of the first aperture, and (ii) is spaced apart from the second electrode; (5) a fourth laminar conductive member which (i) is secured to the first face of the PTC resistive element in the area of the second aperture, and (ii) is spaced apart from the first electrode; (6) a first transverse conductive member which (7) a second transverse conductive member which the first and second laminar devices being physically secured together in a stacked configuration, with the laminar insulating member between them; and the devices being connected together electrically by interfacial electrical connections positioned within the perimeter of said first and second laminar devices and between adjacent electrodes and laminar conductive members so that when an electrical power supply is connected to (i) one of the electrodes and (ii) the third or fourth laminar member on the same face of the PTC resistive element as the electrode (i), the first and second laminar circuit protection devices are connected electrically in parallel.