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    Re: Beating a Dead Horse (aka Worley's Sextant)
    From: Don Seltzer
    Date: 2014 Jan 19, 08:42 -0800

    Stan wrote: In an earlier message I said that Bill's site said the "endless tangent screw" patent was in 1909. I now also note from the site that I might have misinterpreted that. Heath may have applied for the patent in 1909 but did not receive it until March 1910. It was patent no. 17840. Does your sextant actually say "Patent 17840" on it? Mine simply says "Patent" on the tag on the front of the clamp mechanism and on the back of it.


    Attached is Heath's patent.

    Don Seltzer
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