Resistivity measuring heads
AssigneeThe Parc-Amber Company Limited
InventorsRoger Nicolas Crovo Chambers, Peter William Amis
Life of this patent
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Abstract
A resistivity measuring head comprising a body portion and a replaceable nose portion. The body portion contains a plurality of spring-loaded pins located for axial movement in aligned plain openings in a pair of spaced guide plates, and the nose portion contains a number of probes, one for each pin, each precisely mounted in a pair of precisely aligned jewel bearings. The pins bear against one end of the probes for applying an axial working force thereto. Electrical connections are made to the probes either through the intermediacy of the pins or through a plug and socket arrangement wherein the probes are connected to plug pins carried by the nose piece and adapted for engagement with sockets in the body portion.
Claims7
A resistivity measuring head comprising a body portion and a nose portion attachable to and detachable from the body portion, the nose portion having mounted therein a plurality of relatively-short straight probe tips supported parallel to one another for limited axial movement each by means of a pair of spaced jewel bearings fitted into a bore formed in the nose portion, one end of each probe tip being arranged to project from the nose portion for contacting a specimen the resistivity of which is to be measured, and the body portion having mounted therein, for each probe tip, a relatively long spring loaded pin capable of limited axial movement in the general direction of the axial extent of the probe tips and arranged so that, with the nose portion attached to the body portion, one end of each pin bears upon one end of the respective probe tip so as to apply thereto a spring bias.
Dependencies are inferred from the claim text.