Abstract: A hand knife has a removable blade. Side plates are spaced apart on opposite sides of a main frame having a rectangular socket in one end thereof. One side plate has a non-circular aperture therein and the other side plate has a circular opening therein. A pin is movable on a transverse axis relative to the main frame and has a non-circular portion in the aperture and a circular portion in the opening. A blade has an exteriorly rectangular end slidable in a predetermined direction to fit the socket. The end interiorly has a keyhole opening, the circular portion of which fits the larger, circular part of the pin and the rectangular portion of which is open ended in the predetermined direction and fits the smaller, non-circular portion of the pin. A spring normally urges the circular portions into interengagement. A button on the pin, when pressed, overcomes the spring and moves the non-circular portion into sliding engagement with the rectangular portion of the keyhole opening.

Abstract: An improved fishing knife comprises a handle having a substantially planar side surface and a blade, the shank of the blade being coplanar with the planar side of the handle.

Abstract: A cutlery knife that includes a blade set in a handle, and the handle having a new shape that is more comfortable for being held in a hand; the handle including a depression on each opposite side that serves to receive the thumb so to provide a more natural grip and an upper edge of the handle having a depression near its forward end into which a tip of a finger can be placed to serve as a fulcrum point in handling the knife and providing a more firm grip, the depressions being Teflon coated.

Abstract: A camera is fixedly supported in a desired position by providing a support screw, for engagement with the usual threaded opening in the camera base, in association with a sharply pointed member, such as a knife blade, which is inserted into earth, snow, ice, wood, or other supporting material pierceable by the pointed member. The camera support member having the support screw on one end is attached to the tang of the knife blade by a clevis, allowing pivotal movement of the camera to a desired angular position relative to the supporting surface. A hollow, removable handle includes a socket-type wrench for engaging the clevis bolt, and/or another removable element may be used as a screwdriver to engage a slot in the head of the clevis bolt.

Abstract: A knife having interchangeable blades comprising an elongated rigid unitary handle element having an elongated open ended chamber therein, a tapered sharpened knife blade providing a tang at one end thereof dimensioned to be captured and removably secured in the chamber, and bolt means for securing the blade in the chamber.

Abstract: A hand tool including a blade or tool part with a connected tang and a handle part with an aperture extending axially from one end for receiving the tang, a locking pin extending diametrically across the handle part and the tang being provided with a slot for the passage of said locking pin to a cross bore in the tang, the locking pin being rotatable or axially moveable to engage it with said cross bore.