Tooltime History Vintage Tool For Percussive Tools 1943 Black & Decker Patent 2328201

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Wild_Bill 16 years ago

I found one of these odd-looking tools at a garage sale, and was curious what it was meant to do.

Bit Control for Percussive Tools

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In the area of #25 on the drawing, there is a spring captured between two washers, instead of what's shown, so this may have been a design revision.

The tapered hole for the tool is about the size of a Morse #1, but I haven't checked or measured it. The tool appears to be unused, although the handle part is a little rusty. The handle allows the operator to rotate/steer the cutting edge of the tool as it's being impacted.

I've had a desire to steer air chisels while cutting sheetmetal on numerous occassions (and managed to do so with a leather-gloved hand and wide flat chisels), and this sort of accessory would provide that type of control for the original tools with tapered shanks.

I don't recall ever seeing chisels or chippers with a taper at the top end, although such tools are commonly modified for manual use with a hammer.

The inventor is shown as Alonzo G Decker Jr, who was likely the B&D Manufacturing Co founder's son. It seems that B&D Manufacturing Co is credited with the first electric powered tool, Patent 1245860 1917, and the pioneer of the pistol-shaped power drill.

Markings: No. 22587 U. S. Patent 2328201

2413273

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Denis G. 16 years ago

I had an older B&D electric impact drill (percussion only) that used =93A=94 and =93B=94 taper masonry bits -- mostly star drill bits.

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I don=92t know how they compare to Morse tapers. A former co-worker would always disparagingly refer to big old vintage B&D electric drills as =93Black and Decker Pecker Wreckers=94. Those things could really spin you around if you weren=92t careful.

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Gunner Asch 16 years ago

Tools

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Indeed. I have one of them..works ok, but the big Milwaukee rotary hammer works far far far better. And if you hang the bit...you DO go for a ride.

Gunner

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Wild_Bill 16 years ago

Thanks for the direction. I found descriptions of the A and B taper masonry drills.

A: 1" in 20 taper B: 1" in 10 taper

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I've seen hex and splined shanks, but was unaware of tapered ones.

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Denis G. 16 years ago

I would always worry about accidently hitting the trigger lock on those things before the inevitable would happen. As long as you got clear you could watch the "self-winding cord mode" activate and stop the drill=92s devil dance. No doubt that was a planned failsafe feature.

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Ned Simmons 16 years ago

And if you have a lathe and an adapter for your hammer drill that accepts taper shank bits you can cut a taper on most any bit and use it in your drill.

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Gunner Asch 16 years ago

Tools

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Normally when running from an extension cord..I usually do a "loop and wrap" so the cords dont get pulled apart.

When using the big Milwaukee hammer drill...I tie the extension cord to something and simply plug in the drill. I WANT it to pull apart if the bit hangs up...really really want it too.

This is the sort of drill Im talking about. I cant recall if mine is a

5300..but its similar

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Gunner

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Martin H. Eastburn 16 years ago

Some of those allowed pipe to be screwed in as a bracing / anti-twist tool.

The one I have now has a off mode. I think reverse voltage is applied and the motor stops. Don't like the coasters - those can break somethin= g.

Martin

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Tooltime History Vintage Tool For Percussive Tools 1943 Black & Decker Patent 2328201

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