초록 ▼

Described is a coffee percolator having a reservoir provided with means for sensing the filling level of coffee meal therein. The filling level sensing means comprises an electro-optical sensor secured to the outer side of the reservoir across a corner formed by portions of a sidewall and a bottom w

Described is a coffee percolator having a reservoir provided with means for sensing the filling level of coffee meal therein. The filling level sensing means comprises an electro-optical sensor secured to the outer side of the reservoir across a corner formed by portions of a sidewall and a bottom wall. An emitter and a receiver of said electro-optical sensor are disposed along an optical axis extending through the interior of the reservoir substantially diagonally across the corner, the sidewall and the bottom wall being optically transparent at least at the locations whereat the optical axis passes therethrough.

대표청구항 ▼

A coffee percolator having a reservoir for containing coffee meal, said reservoir comprising an upright sidewall, a bottom wall, and conveyor means for discharging coffee meal from said reservoir, said sidewall including at least one portion forming a corner with at least one portion of said bottom

A coffee percolator having a reservoir for containing coffee meal, said reservoir comprising an upright sidewall, a bottom wall, and conveyor means for discharging coffee meal from said reservoir, said sidewall including at least one portion forming a corner with at least one portion of said bottom wall, said reservoir being provided with an electro-optical sensor comprising means for emitting and receiving an optical signal disposed on an optical axis outside of said reservoir, said optical axis extending through said reservoir in a substantially diagonal direction across said corner, said sidewall portion and said bottom wall portion being optically transparent at least at the locations whereat said optical axis passes therethrough.