Shrouded jaws for hook-on type instruments
AssigneeGeneral Electric Company
InventorsWarren N. Kernander, Carl F. Van Bennekom
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Abstract
A pair of relatively movable, shrouded jaws are provided for a hook-on type measuring instrument to insulate the conductive ends of the jaws from contact with high voltage electrical conductors on which the instrument is periodically clamped during its normal application. The shrouded ends of the jaws are characterized by incorporating cup-shaped insulated recesses within which the uninsulated ends of the soft iron magnetic ends of the jaws are disposed substantially below the outwardly extending lips of the recesses thereby to prevent the iron from being inadvertently placed in contact with a high voltage conductor when the jaws are opened to either place them around such a conductor or to remove them therefrom.
Claims5
A pair of relatively movable, shrouded jaws operably mountable on a hook-on type measuring instrument, said jaws being formed to define a closed magnetically conductive loop for encircling an electrical conductor, mounting means for mounting the jaws in relatively movable relationship on an instrument housing to enable the jaws to be moved from an open, conductor-receiving position to a closed, conductor-encircling position, each of said jaws being substantially completely covered with insulating material except for a shrouded portion at the open end of each jaw, a first insulated, conductor shrouding means extending beyond the end of one of said jaws defining a first cup-shaped recess within which the uninsulated, shrouded portion of said one of said jaws is disposed, and a second insulated, conductor shrouding means extending beyond the end of the other jaw defining a second cup-shaped recess within which the uninsulated, shrouded portion of said other jaw is disposed, said first and second shrouding means being formed to cooperate in nesting relationship thereby to enable the shrouded ends of the jaws to be closed in low reluctance relationship against one another.
Dependencies are inferred from the claim text.