Angle gauge for grinding sharp-edged tools

Details Angle gauge for grinding sharp-edged tools Angle gauge for grinding sharp-edged tools

1999-05-13

2001-02-20

Fulton, Christopher W. (Department: 2859)

Geometrical instruments

Gauge

Angle

C033S613000, C033S628000

Reexamination Certificate

active

06189225

ABSTRACT:

FIELD OF THE INVENTION
The present invention concerns an angle gauge used when grinding the lip of sharp-edged tools according to the introduction to claim
1
.
BACKGROUND OF THE INVENTION
It is of great importance that the lip of sharp-edged tools of various types, such as knives, chisels, etc., has the correct cutting angle in order for the tool to function in the correct way and with good control of its movement without the lip being damaged. The correct cutting angle naturally depends on the quality of the steel, the type of tool, the hardness of the wood and how hard one works with the tool. Experience of these variables determines the angle that is correct for each occasion.
A practical way of setting a certain cutting angle, chosen because of the reasons mentioned above, for grinding the tool has not been available. When grinding tools by hand today, there is only one type of template provided with notches or angular-shaped grooves of different angles in which the lip of the tool can be inserted to determine or estimate the cutting angle.
SUMMARY OF THE INVENTION
With the help of the invention, as is evident from the characteristics sections of the claims, an angle gauge has been devised with which it is possible to rig the tool at the grinding wheel and its holder for grinding to the correct, chosen cutting angle, and with which it is possible to even measure cutting angles found on the tool. With the help of the invention, the adjustment of the tool at the grinding wheel holder to attain the correct cutting angle can be made independent of the diameter of the grinding wheel within, of course, reasonable limits.


REFERENCES:
patent: 246625 (1881-09-01), Merrill
patent: 2468395 (1949-04-01), Fredin
patent: 3252223 (1966-05-01), Gettel
patent: 3298106 (1967-01-01), Duvall
patent: 3482325 (1969-12-01), Mitchell
patent: 5611149 (1997-03-01), Fujiwara

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