I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
For sale is this very unique electrical A.C. current tester. Looks like something straight out of a Nine Inch Nails or Tool music video. I researched this online and could not find one like it.
Night Fighter Spot-Search Light FL3SF 12VDC Series A1 Federal Signal Company retail $900 + optional pole $200+ For illumination of an emergency scene, the Federal Signal Night-Fighter® is a powerful three-lamp area halogen light with spot and flood light capability. A single, watertight switch activates the spot light or flood light function. For increased efficiency the lightheads can be easily adjusted both vertically and horizontally.
Your are bidding on: AAF International Astrocel II Cleanroom Air Filter Part No. 29E59B2Z3M3 (900-958-702) Size: 16 3/4" x 11 3/4" x 3 3/4" Flow: 119 CFM Item is untested, but appears to be new, in open box or is not in origi
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