Metal working – Method of mechanical manufacture – Structural member making
Patent
1995-09-19
1997-03-11
Watson, Robert C.
Metal working
Method of mechanical manufacture
Structural member making
29559, 292813, 269 37, 269910, 269303, 269304, 269 99, B30B 302
Patent
active
056089708
ABSTRACT:
A quick release clamp for clamping relative to a member is provided as well as a method of locating frame members of a roof truss frame on a roof truss frame table to permit fabrication of roof truss frames. The clamp has a moveable clamping jaw, a threaded clamping shaft, and a threaded clamping nut. The jaw is attached to one end of the shaft so that it can rotate with the shaft when the shaft is rotated. The shaft has a stop at the opposite end to the jaw. The nut is screw-threadably attached to the shaft between the jaw and the stop. The jaw is arranged to pass through an aperture in a member to which the clamp is to be attached. The aperture may in fact comprise a slot in a track member. The jaw and the aperture are shaped so that in one angular rotated position of the jaw relative to the aperture the jaw can pass through the aperture but in another angular rotated position relative to the aperture the jaw cannot pass through the aperture. The nut is of a size which will span the aperture so that when the nut is tightened with the jaw being in place through the aperture and spanning the aperture, clamping can be effected. The clamp permits quick release by untightening the nut. In this case, the jaw is moved away from the member to which it is clamped as the nut threadably moves on the shaft. When the nut engages the stop the shaft will be rotated with the nut and thereby rotate the jaw angularly so that it can be drawn through the aperture so that the clamp can then be removed from the member. The clamp can be used as an engagement surface for locating the position of frame members in a roof truss frame on a roof truss frame table used for fabricating the roof truss.
REFERENCES:
patent: 169516 (1875-11-01), Brainard
patent: 486228 (1892-11-01), Ilbery
patent: 1033758 (1912-07-01), Howell
patent: 1401444 (1921-12-01), Roberts
patent: 1820667 (1931-08-01), Leyers
patent: 1850338 (1932-03-01), Abegg
patent: 3596898 (1971-08-01), Hilburn
patent: 5342030 (1994-08-01), Taylor
Mount Shamrock Pty Ltd.
Watson Robert C.
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