Apparatus for preparing a hot beverage

Details Apparatus for preparing a hot beverage Apparatus for preparing a hot beverage

1996-03-07

1997-07-22

Alexander, Reginald

Foods and beverages: apparatus

Beverage

Infusors

99279, 215365, A47J 3700

Patent

active

056494718

ABSTRACT:
An apparatus is provided (1) for preparing a hot beverage, comprising a water reservoir (3), means for removing and heating water from the reservoir and transferring it into a brewing chamber (5), and a light-transmissive jug (9) for catching hot liquid emerging from the brewing chamber (5), a wall (13) of the jug (9) being provided with optical means (15) for indicating the volume of liquid contained in the jug (9), wherein the optical means (15) comprise a first graduated scale (159) and a second graduated scale (153), the first scale (159) being clearly visible only when the jug wall temperature is below a reference temperature T.sub.o and the second scale (153) being clearly visible only when the jug wall temperature is above the reference temperature T.sub.o, whereby the reference temperature T.sub.o is within the range of 25.degree. C.<T.sub.o <80.degree. C., the ratio of the pitch of graduations in the second scale (153) to the pitch of corresponding graduations in the first scale (159) being approximately equal to the liquid yield ratio (R.sub.L) of the apparatus. In practice, the optical means (15) may comprise a film (155) of polymer-dispersed liquid crystalline (PDLC) material disposed between the first (159) and second (153) graduated scales.

REFERENCES:
patent: 2533578 (1950-12-01), Gomersall
patent: 3044388 (1962-07-01), Lescure
patent: 4328740 (1982-05-01), McDonough
patent: 4811657 (1989-03-01), Rixer
patent: 5239914 (1993-08-01), Salomon
patent: 5444539 (1995-08-01), Grift

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