An A.H. Reid drill/driver
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Last night a friend was asking about all the old molding planes I had, when I was looking in the tool chest I acquired about twenty years ago, I came across this.
It was interesting enough to model and I believe it does fall into the "woodworking" category.
The lower top handle rotates free-floats from the top one. I can't think of one reason why. Does anyone here have a suggestion why?
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Nice. Do both of the wooden parts at the end spin freely?
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Cool !
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Hold the bottom one and push down on the top one to make the point spin.
Edit: I misread that, thought you were asking why the bottom one moved.
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@DaveR, the top knob is attached to the outer shaft and creates the rotation of the inner spiral shaft, the bottom "grip" has a bushing and does freely rotate. The secondary knob on the top freely rotates also, that's the one I wonder what its purpose was for.
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Was thinking about your screwdriver. The only reason I can think that the collar with the cove might be free spinning is if you needed to drive a screw where you couldn't reach the collar near the bit. You could hold the upper collar with one hand and push with the other.
Tried looking up some info on it. Found a patent from around 1882. I think that's older than my Yankee screw drivers.
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Okay, I got the solution! After adding some lubricant to the coved upper knob it allows the outer shaft to spin on the upstroke, letting the bit stay in whatever you were driving.
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Ah.... Very good.
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