Method of determining the quantity of the material cut by an ele

Details Method of determining the quantity of the material cut by an ele Method of determining the quantity of the material cut by an ele

1998-08-06

2000-06-06

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

340661, 340664, 30 45, G08B 2100

Patent

active

060723998

ABSTRACT:
The invention is directed to a method and a circuit arrangement for determining the quantity of the material cut by an electrically powered cutting tool. According to the present invention, the fluctuations of the current consumed by a drive motor are detected, filtered and evaluated. By a comparison with a reference value, it is possible to determine the soiling of the cutting tool with cut residues. The invention is particularly suitable for use in shaving apparatus.

REFERENCES:
patent: 3846688 (1974-11-01), Perloff
patent: 4075792 (1978-02-01), Schreiber
patent: 4158284 (1979-06-01), Wehde
patent: 4242860 (1981-01-01), Wehde et al.
patent: 5111580 (1992-05-01), Bosscha et al.
patent: 5274735 (1993-12-01), Okada
patent: 5600888 (1997-02-01), Becker
International Search Report dated Jul. 22, 1999.

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