Antique beam compass Starrett and Brown & Sharpe
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  1. #1
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    Default Antique beam compass Starrett and Brown & Sharpe

    Here are a couple of hard to find ones.

    Called a "beam compass" and often mistaken for trammel points. Unlike trammel points, the beams on these are only about 4" long.

    I just acquired the Starrett, it is a model 89.

    The Brown & Sharpe I've had for a while. I have no idea of the model number for that one. It has a unique method for fine adjustment. The small knob on the end of the beam rotates a long threaded rod inside the beam that moves the point at the other end.

    Steve.

    Sent from my LM-G900TM using Tapatalk

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  3. #2
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    Here is my Starrett No. 89 Universal Dividers. As you see, it has a coupling so that an extension beam can be added. The beam is just a round rod with a flat on one side, but I never needed to make an extension. The catalog page is from Cat. 20, dated 1914 in the flyleaf of my leather bound copy. I can see little design changes comparing the actual tools and the catalog cuts.

    I have the big one too, but it is not very old.

    Larry

    dsc01129.jpg cat.-20-1914-no.-89.jpg dsc01123.jpg

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  5. #3
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    Hi Larry,
    I noticed the larger ones are described in my newer catalog as trammels and start at 10". I have parts of one. Very nice set you have there.

    The coupler you have there would have been an extra accessory 89F. I bet those are even more scarce. The bent leg suggests we both have 89A's but I am missing the cone shaped adapter that came with the 89A.

    Steve.

    Sent from my LM-G900TM using Tapatalk


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