Work holders – Magnetic holder
Reexamination Certificate
2002-10-22
2004-03-23
Watson, Robert C. (Department: 3723)
Work holders
Magnetic holder
C269S037000, C269S045000
Reexamination Certificate
active
06708964
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a welding clamp assembly and more specifically one that is utilized for sculptural welding or structural welding where the two metal members being joined are oriented at angles other than 45 degrees or 90 degrees.
There are prior art welding clamp assemblies that allow metal structural members to be positioned with their lateral edges oriented to each other at 45 degrees and 90 degrees. If the metal members are to be oriented to each other at various other angles, the sculpture welder has to position the metal members at a desired angle to each other and tack weld them in order to maintain the desired angle. You may then eyeball the orientation of the two members and decide if this is the orientation that he desires. If this is the orientation he wants, he will permanently connect them together with a bead weld. If the sculpture welder is not satisfied with their orientation, he must either break or melt the spot welding and start the process over again. This repositioning and spot welding may be required many times.
It is an object of the invention to provide a novel welding clamp assembly that can position adjacent parts together and also hold them in position at various angles other than 45 degrees, 90 degrees, or 180 degrees.
It is also an object of the invention to provide a novel welding clamp assembly that prior to welding allows adjacent parts to be eyeballed in various positions without needing to tack weld them together.
It is another object of the invention to provide a novel welding clamp assembly that is easy to use.
It is an additional object of the invention to provide a novel welding clamp that is economical to manufacture and market.
It is a further object of the invention to provide a novel welding clamp assembly that is ideal for sculptural welding.
SUMMARY OF THE INVENTION
The Any Angle Magnetic Welding Clamp Assembly has a flexible metal cable with a magnetic unit secured to each of its opposite ends. The metal cable is preferably of the microphone-type cable that allows the cable to be bent in various curvatures that are self maintained without assistance from other structure. In effect, the cable has a memory. This is extremely important when doing free form sculptural welding or if the welder is trying to fit a piece to an existing piece at an odd angle. This allows the welder to align two parts with respect to each other prior to welding or spot welding and eyeball the orientation of the two metal members to see if the welder is satisfied with their positioning. The welder can change the orientation multiple times by merely twisting the metal cable as necessary and its memory will hold the two metal pieces in different angular orientations to each other. A sculpture welder could use multiple Any Angle Magnetic Welding Clamp Assemblies to assemble multiple parts for visual purposes prior to welding in place. The metal members to be welded together can be plate members, tubular members, etc.
The magnets are preferably ceramic magnets, although other types of magnets can be used. The flanges on the housing or shell of the magnet units protect the fragile ceramic magnets.
REFERENCES:
patent: 1828791 (1931-10-01), Thompson
patent: 2379136 (1945-06-01), Erwin et al.
patent: 2887974 (1959-05-01), Weinfeld
patent: 5398176 (1995-03-01), Ahuja
patent: 5971379 (1999-10-01), Leon, Jr.
patent: 6499851 (2002-12-01), Kelly et al.
patent: 6520495 (2003-02-01), La Mendola
Logan II Charles C.
Watson Robert C.
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