Abstract: A optical profile reader, particularly for key duplicating machines, incorporationg a photoemitter (16) positioned on one side of the profile (11) to be read, and a photodetector (21) facing the photoemitter (16), but on the opposite side of the profile to be read. Stepper motors (5, 8) are included for causing the profile (11) to be read to move orthogonal to the direction of a light beam striking the profile to be read. An electronic circuit controlled by the output signal of the photodetector (21) is also provided. The electronic circuit uses a threshold discriminator (25) set at a value between the values corresponding to the maximum and minimum illumination states of the photodector (21). The threshold discrimination circuit (25) also controls the operation of the stepper motors (5, 8).

Abstract: The present invention is drawn to a combination microwave/infrared oven heating a box-like structure in which a plurality of chambers are defined. A microwave heating source is associated with at least one of the chambers for generating microwaves therein, an infrared short-wave radiation source is associated with at least another one of the chambers for generating short-wave infrared radiation therein, and a medium-wave infrared radiation source is associated with at least yet another one of the chambers for generating medium-wave infrared radiation therein. A rotary conveyor is rotatably supported in the oven within the box-like structure and conveys foodstuffs in the oven successively through the chambers. An electronic circuit including a central logic system controls the operation of the rotary conveyor to set the time periods during the foodstuffs conveyed in the oven remain in respective ones of the chambers.