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B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
B24D15/081—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact
B24D15/082—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact the elements being rotatable
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FR567845D1923-06-251923-06-25
Device applicable in particular to sharpening scythes and can also be used for sharpening any other sharp tools
ExpiredFR567845A
(en)
Device for transforming a relaxation tension increasing, within the limits of the relaxation interval, according to a non-linear law, into a relaxation tension increasing in an approximate manner according to a linear law