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  1. #1
    Join Date
    Dec 2013
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    San Antonio, Texas, USA
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    Default Brewer Keyhole Saw

    This old tool was represented as a plane makers float. As you can see it has an auger/gimlet point and one edge is configured with crosscut type teeth.

    Brewer keyhole saw 2.JPGBrewer keyhole saw 4.JPG

    The other faces are configured as typical for a float with rip type filing.

    Brewer keyhole saw 3.JPGBrewer keyhole saw 5.JPG


    On the shank end it is stamped 'Patented, September 18, 191 with what appears to be the tip of a 7 registered on the extreme edge of the blade.




    I got lucky and found the patent on the first try. Surprisingly the specification relates that this is intended to function as a crosscut saw, a rip saw, a drill and a chisel and a rasp.

    Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.

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  3. #2
    Join Date
    Dec 2013
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    San Antonio, Texas, USA
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    Default

    Very little info about this out there. Here's the only additional bit I've found.

    Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.

  4. #3
    Join Date
    Sep 2009
    Location
    victor harbor sa
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    315

    Default

    Hello Rob,

    what a fantastic tool not only does it drill the starting hole but it can also cut with and across the grain,
    with a nice long taper for various size key holes, I want one.

    Graham.

  5. #4
    Join Date
    Dec 2013
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    San Antonio, Texas, USA
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    Default

    Hi Graham,

    I've sharpened it and done some testing. I works well as a float, less well as a saw as the kerf is about 3/16". The drill is about 1/8" in diameter and not too effective.

    Regards,
    Rob
    Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.

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