Sword blade

Details Sword blade Sword blade

1988-04-25

1990-01-02

Schran, Donald R.

Cutlery

Blades

Razor blade

D22118, F41B 1302

Patent

active

048903906

ABSTRACT:
A sword blade is formed of a rib (3) connected by stress concentration studs (19) to a pair of extension strips (2), so that the moment of inertia of the cross section of the rib, with respect to a plane of inertia (x'-x) passing through the concentration studs, is equal that of the strips, all along the length of the sword. The concentration studs concentrate stress in the blade and are deformed and break, thus alerting the user to discard the sword, end faces (10b, 14a) of the rib and extension strips are formed parallel to the plane of inertia, for distribution stress across these faces, to prevent the starting of cracks causing the sword to break.

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