Donald E Thies, Stephen A Bender: Heating device for a small appliance. The West Bend Company, Jansson & Shupe, July 29, 1997: US05651905 (10 worldwide citation)

Disclosed is a new heating device for an appliance such as a coffee urn. Such device has a main heating element and a spaced-apart warming element, both of which are embedded in a common casting. The device may be mounted to and removed from an appliance as a single unit and when mounted, the main h ...