Frame pinning device

A device for pinning a mitred joint between the ends of two lengths of picture frame moulding comprising a support, releasable clamp means mounted on said support for clamping the length in assembled relationship to each other, and two pinning assemblies mounted on said support and arranged to drive pins into the mitred joint at substantially 90.degree. to each other, each pinning assembly comprising a housing provided with a magazine for pins and with a chamber for receiving the pins singly in succession frm said magazine, a reciprocable pin driver slidable in said chamber of said housing, and a hand-operable lever conncted by a mechanical linkage to said pin driver for advancing said pin driver through said chamber, said releasable clamp means comprising a pair of abutment faces extending at 90.degree. to each other and fixed relative to said support, a releasable jaw assembly comprising two jaw members which are slidable on said support in a direction substantially bisecting the angle between said abutment faces and which are slidable relative to each other in that direction, each of said jaw members having a clamping face extending parallel to the corresponding one of said abutment faces, resilient means biasing said jaw members towards said abutment faces, and a further lever connected to said jaw member for retracting said jaw members against said resilient means.