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US 4,817,942 AGranted
Safety fencing sword
AssigneeBegon S.A. Societe Anonyme
InventorJean A. Begon
Life of this patent
Estimating the term…
Abstract
A fencing sword, especially an epee or a foil, whose blade is provided with at least one groove defining a strain concentration zone, dimensioned to rupture longitudinally to separate two longitudinal parts of the blade from one another so that, with subsequent impacts, there is a change in the nature of the sound generated by impact. The rupture occurs when the metal fatigue reaches a point at which transverse rupture might be expected so that the sound change can inform the user of the need to discard the blade.
Claims10
A safety fencing sword capable of providing an audible indication of metal fatigue, comprising:
- an elongated blade having a tip at one end and means for mounting a handle at an opposite end of the blade;
- and
- at least one groove formed in said blade and subdividing same over at least a portion of the length of said blade from said tip into at least two elongated blade parts held together by a strain concentration zone fixedly and unitarily interconnecting said parts for effective fencing, said strain concentration zone being dimensioned and configured to rupture longitudinally upon the development of a fencing-use-generated fatigue of the material approaching a transverse-breakage condition to cause exclusive longitudinal separation of said parts at said portion of said blade, thereby altering a sound generated by the blade upon impact.
Dependencies are inferred from the claim text.