E. Fuller has but one brace patent recorded, and it rates a "NS" (Not Seen) from
Ron Pearson. This patent is #320868, awarded on June 23, 1885. It is
for a chuck that is fairly unusual. It has an internal coiled spring that
provides the force to close the jaws as the chuck shell is pushed forward.
The brace that I own is a sturdy 10" sweep one with decorated cocobolo cup
handle and rosewood wrist handle bounded by pewter retainer rings. The
chuck is marked, "Fuller Mfg Co / Pat. June 23, 1885." The chuck shell
pulls back to open and expose the interlocking jaws. When it is pushed
forward, it grasps the bit--although not with the force that the ordinary screw
chuck shell exerts. The range of movement is about 3/4". This
mechanism must not have been very useful, hence the rarity of the brace!.
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