Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Reexamination Certificate
2011-04-26
2011-04-26
Vortman, Anatoly (Department: 2835)
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
C337S241000, C337S206000, C337S265000, C116S206000, C116S207000, C324S507000, C324S550000, C340S638000
Reexamination Certificate
active
07932805
ABSTRACT:
A fuse includes a fuse state indicator on the exterior surface of the fuse body. The fuse state indicator includes an electrically conductive element electrically connected to and extending between the terminal elements. A temperature sensitive element proximate and in thermal contact with the electrically conductive element includes material capable of changing color when heated to a predetermined transition temperature to form a mark on the temperature sensitive element. The fuse state indicator forms a first mark on the temperature sensitive element when heat from the electrically conductive element transfers to the temperature sensitive element in response to a first overcurrent condition, and forms a second mark, distinct from the first mark, on the temperature sensitive element when heat from the electrically conductive element transfers to the temperature sensitive element in response to a second overcurrent condition distinct from the first overcurrent condition.
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Ackermann John M.
Ban Anthony C.
Darr Matthew R.
Douglass Robert S.
Torrez Jaime A.
Armstrong Teasdale LLP
Cooper Technologies Company
Vortman Anatoly
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