Disassemblable jack knife

Cutlery – Sheathed – Pivoted blade

Patent

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Details

30339, B26B 500

Patent

active

044083947

ABSTRACT:
A jack knife which may be disassembled with a minimum of tools for purposes of cleaning the interior, changing blades or the like. The knife has a pair of liner side plates encasing a backspring and thereby providing a compartment for receiving a knife blade. Each of the side plates has a slot of nonuniform width near the head end for receiving an annularly grooved pin. This pin also passes through the head end of the backspring. A pivot through the back-spring engages a cooperative pair of apertures in the side plates and provides a pivot for the rotation of the side plates with respect to each other when disassembly is desired. A blade pivot member passes through one side plate and through an opening in the tang of the knife blade and thence is suitably engaged with the second side plate. Additional apertures in the side plates at a position corresponding to the blade walk edge of the forward portion of the backspring are provided to receive a pointed tool which causes the backspring to be disengaged from the tang of the knife blade. This disengagement permits the removal of the knife blade after the removal of the blade pivot member. The side plates may be externally provided with conventional end bolsters and caps, as well as a decorative insert, on the handle. The pointed tool for disassembling may be a simple pointed nail or the like.

REFERENCES:
patent: 903709 (1908-11-01), Guthrie
patent: 1014927 (1912-01-01), White
patent: 1182043 (1916-05-01), Schless
patent: 2977678 (1961-04-01), Swinden
patent: 3061927 (1962-11-01), Ludwigsdorf
patent: 4161818 (1979-07-01), Phelps
patent: 4218819 (1980-08-01), Phelps

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