Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1985-06-24
1987-09-01
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
340639, 361104, 337241, G08B 2100
Patent
active
046911979
ABSTRACT:
A solid state switching circuit for energizing a lamp (L) is connected around a fuse (12) across an AC supply for detecting a voltage differential at the opposite sides of a blown fuse and applying that differential across the control (g) and switching (c) electrodes of the solid state switch (SCR) to render the same conductive. Current limiting resistors (RL1 and RL2) are placed in the ends of wire conductors which are to be connected at opposite sides of the fuse, thereby to limit current flowing in the conductors over the entire length of the conductor, minimizing electrical shock hazard upon damage to the conductor.
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"Fuse Failure Warning" by N. Ruiz; Practical Electronics, vol. 12, No. 7, Jul. 1976, p. 593.
Advertisement entitled "Don't Be Kept in the Dark. Switch to the Cutler-Hammer K Series with BFI's.", Apr. 1985.
Advertisement entitled "New Cutler-Hammer BFI's. They're Just Looking For Trouble", May 1985.
Damiano Michael A.
Schmerda Richard F.
Eaton Corporation
Hofsass Jeffery A.
Rowe D. A.
Rowland James L.
Vande Zande L. G.
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