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US 4,045,762 AGranted
Remote control fuse closing device
AssigneeS&C Electric Company
InventorJohn F. Foulkes
Life of this patent
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AssigneeS&C Electric Company
InventorJohn F. Foulkes
Estimating the term…
A small expendable rocket engine is attached to an electrical switching element and ignited to provide propelling force to open or close the switching element into or out of a circuit. An electrical ignition system attached to the rocket engine can be actuated remotely to ignite the rocket engine either by a relay switch or by the lineman using an insulative cord so that the lineman is remotely positioned when the switching element is closed into the circuit. The rocket engine is expendable and can either be removed from the switching element after operation by dislodging it by pulling on the cord, or a releasable connector can be used to connect the rocket engine to the switching element so that the rocket engine automatically disengages the switching element after operation. The rocket engine may be left in place after switching operation on the switching element if its presence will not adversely affect normal operation of the switching element. The rocket engine may also be ignited by the operation of automatic control circuitry to provide automatic unattended high speed operation of the switching element.
A device for causing a switching element of an electrical switching device in an electrical circuit to move the switching element from a first position representative of a first circuit condition to a second position representative of a second circuit condition comprising:
In a conventional high voltage fuse arrangement comprising:
In a conventional high-speed grounding switch arrangement including a first terminal connected to a portion of an electrical circuit, a second terminal connected to electrial ground, a switch blade pivotably mounted to the second terminal so that the switch blade can be pivoted to engage the first terminal to ground the first terminal;
Dependencies are inferred from the claim text.