Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1998-01-27
1999-09-28
Picard, Leo P.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337 4, 337265, 340638, 361626, H01H 8530, G08B 2100
Patent
active
RE0363170
ABSTRACT:
An indicating fuse assembly includes an electrically non-conductive housing; an array of first and second electrically conductive contacts supported by the housing, each pair of first and second contacts being adapted for connecting a replaceable fuse, the contacts being connected in a powered circuit wherein each fuse, when connected between a respective pair of the contacts, is electrically series-connected with a load of the circuit; and a plurality of illuminators electrically connected within the housing for displaying open circuit conditions of corresponding ones of the fuses when the contacts are connected in the powered circuit, electrical current in the illuminators being limited to a minor fraction of a rated current of the corresponding loads. At least some the illuminators can include bipolar pairs of light emitting diodes for activation of the respective illuminators without regard to polarity of the circuit. In a preferred configuration, the assembly also includes a detector driver circuit for sensing activation of any of the illuminators, signaling an external circuit. The detector driver circuit can be configured for independently sensing a voltage across each fuse for driving the illuminators with current not flowing in the loads.
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Gandhi Jayprakash N.
Picard Leo P.
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