Control instrument for electric hot plates

US4302662A · kind A · utility

Assignee

• E.G.O. Regeltechnik GmbH · DE

Inventors

• Robert Kicherer · Maulbronn, DE
• Wilfried Schilling · Gondelsheim, DE

Key dates

• Filing date: Aug 16, 1979
• Grant date: Nov 24, 1981
• Expiry date: Aug 16, 1999

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F24C15/106
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A control instrument is used for the manually continuously adjustable supply of electric power to electric hot plates in the form of individual power pulses. The control instrument contains a switch, operated by a bimetallic member, whose heater is controlled by an electronic circuit and supplies current to the heating means in individual half-waves. An automatic initial cooking device with an electronic timing member is provided which, during the initial cooking phase, reduces the power supply to heater in a predetermined ratio and consequently correspondingly increases the power supplied to the electric hot plate. The automatic initial cooking device is automatically switched on by the control instrument knob. By rotating the control knob beyond a median power limit the automatic initial cooking device is switched off.