Electric heating – Heating devices – With power supply and voltage or current regulation or...
Reexamination Certificate
2005-04-26
2005-04-26
Paschall, Mark (Department: 3742)
Electric heating
Heating devices
With power supply and voltage or current regulation or...
C219S508000, C219S506000, C219S501000, C219S212000
Reexamination Certificate
active
06884973
ABSTRACT:
A control circuit for a heating pad. The control circuit includes a two-pole, four-position slide switch. The four positions of the two-pole, four-position slide switch include off and three different heat settings of the heating pad. The control circuit also includes three heat setting indicators that are alternatively illuminated when the switch is in the three different heat settings. Diodes are used to direct electrical currents through the indicators as appropriate. The diodes and the two-pole, four-position slide switch are arranged so that current may be appropriately flow through, or may be blocked from flowing through, the indicators when the two-pole, four-position slide switch is in each of the three heating settings.
REFERENCES:
patent: 4897526 (1990-01-01), Anthony
patent: 5451747 (1995-09-01), Sullivan et al.
patent: 5708256 (1998-01-01), Montagnino et al.
patent: 5861610 (1999-01-01), Weiss
patent: 6107744 (2000-08-01), Bavaro et al.
patent: 6582456 (2003-06-01), Hand et al.
Paschall Mark
Shurupoff Lawrence J.
Sunbeam Products Inc.
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