Electric heating – Metal heating – Of cylinders
Patent
1990-01-29
1992-03-17
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055C, 200 38B, 200 38FA, H05B 668
Patent
active
050971050
ABSTRACT:
Control device for microwave ovens comprising a timer whose movement (1) drives a periodic actuating mechanism of the actuator (2) of a switch (3), mounted in the electric supply circuit of the oven, as well as a selector (4) of operating modes manipulable by the user and adapted to influence the actuation mechanism so as to modify the open and closed periods of the switch (3) so as to obtain different modes of cooking. The periodic actuation mechanism comprises an actuator (5) which is movably mounted against a spring (6) with reciprocatory movement and which carries a cam (7) adapted to act on the actuator (2) of the switch (3). A cylinder (8) is driven in rotation by the timer and is slidably axially along its axle (9) of rotation by a transmitter (10) in contact with the mode selector (4). A toothed region (11) carried by the actuator (5) temporarily engages at least one toothed region (12) on the side surface of the cylinder (8). The cylinder teeth are circumferentially spaced and extend parallel to the axle (9) of the cylinder (8) by progressively different lengths, thereby defining a multiplicity of toothed peripheral paths (P1, P2 . . . ) having respectively different arcuate lengths as a function of their location along the length of the cylinder (8). The duration of engagement of the cylinder (8) with the actuator (5) and hence the on or off time of the oven will be a function of the position of the cylinder (8) along its axle relative to the actuator (15) as determined by the mode selector (4).
REFERENCES:
patent: 4129769 (1978-12-01), Takagi et al.
patent: 4133998 (1979-01-01), Otani
patent: 4177370 (1979-12-01), Otani
patent: 4551590 (1985-11-01), Mahon
patent: 4629845 (1986-12-01), Mahon
patent: 4678930 (1987-07-01), Mahon
Boin Bernard
Brisard Pierre
Leung Philip H.
Moulinex (S.A.)
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