Solid state electronic oven control system

Claim 1

A control system for an electric meatcooking oven for controlling the current flow in an electric heating cable associated with the oven, the control system including: switching means connected in circuit with the cable and a source of energizing electric current; an oven temperature module for generating an output signal so long as the oven temperature is below a pre-set temperature level; a meat temperature module for generating an output signal so long as the internal temperature of the meat being cooked in the oven is below a pre-set cooking temperature level; electric circuitry connecting said oven temperature module and said meat temperature module to said switching means and having an automatic mode in which said switching means is controlled to permit current flow through the cable until the pre-set oven temperature is reached and thereafter to control the current flow in the cable to maintain the oven at the pre-set oven temperature until the pre-set internal temperature of the meat is reached; switching circuitry connecting said electric circuitry to the oven temperature module to cause the oven temperature module to generate its output signal in said automatic mode only when the oven temperature falls below a pre-set holding temperature lower than said pre-set cooking temperature level, after said pre-set internal temperature of the meat has been reached; said electric circuitry also including manually controlled logic circuit means to set the system to its automtic mode, and alternately to set the system to a manual mode in which the circuitry is independent of the output of the meat temperature module so that the oven is established at the pre-set temperature by said oven temperature module; and manually controlled switching means connected to said oven temperature module and to said meat temperature module for setting the oven temperature module and the meat temperature module to different pre-set temperature levels.