Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1987-12-18
1988-09-27
Broome, H.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337177, H01H 7110, H01H 7120
Patent
active
047744880
ABSTRACT:
An electric cutout of the link break type includes a fuse holder comprising a hollow fuse tube of insulating material, a lower tube casting secured to one end of the fuse tube, a conducting hinge element pivotally mounted on one side of said lower tube casting and having a pair of coaxial trunnions seated in a pair of jaw contacts constituting one terminal of the cutout, an ejector element pivotally mounted on the conducting hinge element biased away from the fuse tube and having its swing end normally spaced from one end of the fuse tube and substantially normal to the axis of the fuse tube together with a ramp portion angularly disposed to the axis of the fuse tube and to the swing end portion thereof and integral therewith, a fuse link disposed within the fuse tube and having an extension secured to the conducting hinge element and in engagement with the swing end of the ejector element so as to hold the conducting hinge element and the ejector in their normal positions, a manually operable fuse link breaking element pivotally mounted on the lower tube casting and having its swing end portion normally interposed between the collar and the ejector element and in contact with the ramp portion of the ejector element whereby sliding movement of the link breaking element along the ramp imparts a gradually increasing link breaking force to the fuse link.
REFERENCES:
patent: 2835764 (1958-05-01), Earle
patent: 2836681 (1958-05-01), Bracey
Broome H.
Kearney-National Inc.
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