Toaster with mains-power-on safety device

Details Toaster with mains-power-on safety device Toaster with mains-power-on safety device

1997-04-17

1998-06-02

Simone, Timothy F.

Foods and beverages: apparatus

Cooking

Automatic control

99337, 99389, 219464, 219492, 219497, 219501, A47J 3708

Patent

active

057585679

ABSTRACT:
A toaster has electrical parts which are energized from a mains voltage. The bread is conveyed to a toasting chamber (4) by means of a lift (6) and a handle (12). In the end position of the handle (12) a main switch (SW5) is turned on, as a result of which the electrical parts can be powered from the mains voltage. The heating elements receive mains voltage via triacs controlled by a microcontroller. After completion of the toasting cycle the microcontroller turns off the heating elements, which precludes burning of the bread, even if the main switch remains in its on-position as a result of a mechanical defect. Subsequently, the microcontroller checks the presence of the mains voltage. In that case a signalling device is activated to warn the user that the mains voltage supply to the toaster has not yet been turned off.

REFERENCES:
patent: 4454803 (1984-06-01), Wolf et al.
patent: 4487115 (1984-12-01), Su
patent: 4503758 (1985-03-01), Carville
patent: 4510376 (1985-04-01), Schneider
patent: 4755656 (1988-07-01), Charlesworth et al.
patent: 5088389 (1992-02-01), Fresno
patent: 5438914 (1995-08-01), Hohn et al.

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