Patent · US Expired

Device for sensing the number of items stored in a compartment

US4810957A · kind A · utility

5Cited by

3References

20Claims

0Family size

Assignee

Aktiebolaget Electrolux · SE

Inventors

Jan Rubbmark · Malmö, SE
Leif A. Unruh · Malmö, SE
Bjorn L. G. Bjernstad · Malmö, SE
Nils E. H. Olsson · Bara, SE
Mariusz Gerlach · Järfälla, SE

Key dates

Filing date	May 29, 1987
Grant date	Mar 7, 1989
Priority date	—
Expiry date	May 29, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG07F9/02
WIPO fieldControl
WIPO sectorInstruments

Abstract

A device for sensing the number of items (14) consecutively disposed in a compartment (12), preferable bottles or cans disposed in a beverage magazine (13) in a refrigerator (10). At each item (14) at opposite sides of said item electric conducting areas (20a,b,c;21a,b,c) are provided which form a capacitor (22a,b,c). The capacitors formed in each compartment are interconnected to form a circuit (C.sub.k) the capacitance of which depends on the number of items (14) in the compartment (12).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.