Scissors extending work lightThis article contributed by Ron Walters
Make all the slats you will need for the project plus a few extra in case of breakage or warping. The slats in this project are 15-1/2" long x 1-1/2" wide x 3/8" thick cut from a piece of 2x4. I used 5/8" dowel.
Construct a simple two-pin drilling jig, which will allow you to drill all of the holes with one setup.
Make sure the holes in the moving slats are smooth and all slats move smoothly on the pins when assembled. Completely assemble the scissors and test for freedom and range of movement. Occasionally a slat will bow or warp and will not work in the assembly.
The light fixture I originally intended to use did not have one of these ball joints. The ball joint makes the indicated pieces unnecessary.
Metal fender washers and screws are used to retain and center the guiding dowels at the ends of the scissors and allow for disassembly. To eliminate the fender washers, the dowels can be selectively glued to one of the scissors slats being careful not to glue everything rigid. Alternatively, the washers could be made of matching wood.
The elongated slot at the front is cut parallel to the adjacent scissors member (parallel when scissors is closed - see video).
The wall mount is made using wooden spacer washers at the top and bottom of the scissors connections. The elongated slot in the wall mount is made long enough to provide full range of motion while not allowing the scissors to open too far. Over extending the scissors makes them quite weak and easily broken.
Other projects by Ronald Walters:
Dad's extending lamps
Simple light stands
from discarded lamps
More projects by Ron Walters