Locking ring for corners of plywood form panels

Claim 1

In a construction form including a supporting frame, a deck resting on said frame and serving as the base on which concrete is poured, said deck comprising a plurality of rectangular sheets of plywood or the like laid flat, having top and bottom faces, edges therebetween and with their edges substantially abutting and defining at least one corner at which four of said sheets meet, the improvement comprising: a fixture at said corner, said fixture comprising a top plate abutting the upper face of the four sheets at said corner, a bottom plate abutting the lower face of the four sheets at said corner, and connecting means connected to and extending between said plates in juxtaposition to the edges of the sheets and holding the plates against separation; whereby the four sheets at said corner are held in vertical alignment with respect to each other, said connecting means comprising two vertical webs positioned at right angles to each other and integral with said plates and, with said plates, defining four sheet receiving pockets of quadrant configuration.