CARPENTER'S PULL-APART FRAMING SQUARE

摘要

A carpenter's square that can have the arms thereof separated for ease of storage and joined together during use includes an over-center latch arrangement designed to be no thicker than the thickness dimension of the arm members and which, when operated, tightly clamps the arms of the square at right angles to one another. A first arm of the square has an opening formed through the thickness dimension thereof along with alignment bores extending inwardly from a side edge thereof on either side of the opening. The second arm includes the over-center latch pivotally mounted in a slot or channel and includes a latch plate pivotally joined to a coupling member having posts on the distal end of the coupling member designed to fit within the opening on the first arm member and be received by slots in the second arm member.

主权项

1. A separable carpenter's square comprising:
(a) a first elongated rectangular arm member having a pair of alignment bores formed in an edge surface thereof and an opening formed through a thickness dimension thereof intermediate the pair of alignment bores; (b) a second elongated rectangular arm member having a pair of alignment protuberances projecting outwardly from an edge surface thereof and adapted to be received in the alignment bores of the first arm member, the second arm member having an elongated notch formed inwardly between the alignment protuberances; and (c) a dual-latch plate pivotally mounted in the elongated notch of the second arm member and cooperating with the opening of the first arm member for releasably clamping the first and second arm members to one another;
wherein the dual-latch plate comprises a) an arcuate, pivoting coupling member having two longitudinal sides and two posts, one post extending outwardly from each of the two longitudinal sides, the arcuate, pivoting coupling member pivoting within b) a proximal latch plate, and d) two receptor slots on opposed sides of an opening in the first arm member, the proximal latch plate adapted to apply elongating strain on the arcuate, pivoting coupling member when pressed down while the two posts are positioned within the two receptor slots.