Kearney-national Inc.

Ortho Pharmaceutical (canada) Ltd.

Billy R Livesay

Arthur C Westrom

Melvin R Toews

Howard J Tatum

W Ralph Crooks

James W Larsen

In a current limiting fuse, the combination of a plurality of metallic fuse strips and a packing of silica enveloping said strips, said strips being made of cadmium alloyed with a grain size stabilizing minor amount of a metal selected from the group consisting of zinc and silver.

Element for a current limiting fuse

A system for the detection, location and extraction of an intrauterine device ('IUD') including a magnetic IUD, a locator probe to be used intravaginally and an extractor probe to be used intrauterinally, both containing at least one Hall effect generator. The probe is inserted into the patient and an indicator means is provided to communicate the presence of the IUD, in the case of the locator, or the distance of the IUD from the probe, in the case of the extractor. After positioning the extractor next to the IUD using the indicator for guidance, grasping means in the extractor is actuated to effect temporary attachment of the IUD to the extractor which is then withdrawn from the uterus.

Intrauterine device detection and removal system

Method for the detection, location and extraction of an intrauterine

For interrupting all values of electric current in a high voltage circuit which cause operation of a fuse within one hour, a plurality of parallel connected helically configured fusible elements formed of cadmium are embedded within quartz sand in granular form disposed within a housing structure which includes a tubular member of insulating material to the ends of which terminal caps are secured and connected to the ends of the fusible elements respectively so that currents of a high order of magnitude are interrupted in a fraction of a half cycle in a current limiting fashion and so that currents of a low order of magnitude and which are slightly in excess of normal rated load current of the fuse cause the temperature of the fusible elements to rise to the melting point within a longer predetermined period of time and then to establish a gap sufficient to withstand the recovery voltage. For substantially preventing degradation processes in the cadmium fusible elements, a non-porous metallic coating of substantially uniform thickness between 0.5 and 10 microns is arranged to cover each fusible element and wherein there is substantially no inter-metallic diffusion through the interface between the cadmium fusible elements and their metallic coatings at temperatures below the melting temperature of cadmium.

Metallic coating for a cadmium fuse

Growing community of inventors

Atlanta, GA, United States of America

Billy R Livesay