Aroma generating apparatus and driver circuit

Details Aroma generating apparatus and driver circuit Aroma generating apparatus and driver circuit

1987-10-13

1989-01-03

Goldberg, E. A.

Electric heating

Heating devices

Resistive element: igniter type

219276, 219502, 219518, 219492, A61L 903

Patent

active

047958839

ABSTRACT:
An aroma generating apparatus includes a driver circuit which functions as a real time lapse counter and includes a signal indicator to designate the replacement period of useful lifetime of the aroma producing cartridge. The driver circuit continuously operates between a low frequency during the off state of the resistance heating element and a high frequency during energizing of the resistance heating element. The dual frequency permits monitoring ofthe real time operation of the apparatus without the need of providing memory devices to accommodate inoperative periods of the apparatus.

REFERENCES:
patent: 2660828 (1953-12-01), Abrams
patent: 2758412 (1956-08-01), Loibl
patent: 2784466 (1957-03-01), Burns
patent: 4415797 (1983-11-01), Choustoulakis
patent: 4675504 (1987-06-01), Suhajda
patent: 4895928 (1975-07-01), Moran

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