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Antique beam compass Starrett and Brown & Sharpe

stevewatr

stevewatr

Stainless
Joined
Aug 9, 2013
Location
Worcester County, Massachusetts
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.
101728ef5decb059198df67b5fdaebea.jpg
b7f5acba6a4f9abf88ac0d75446db69f.jpg
d6e41020498d24d2ed6e03e3b2b43800.jpg
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Sent from my LM-G900TM using Tapatalk
 
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
 
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
 
Have you had any luck in identifying the brown and sharpe. I acquired one off of market place. Only thing that bugs me is the threaded portion on the top. I have no idea what belongs there.
 
The Brown & Sharpe piece pictured appears to actually be a #775 spacing attachment for an automatic center punch. See below from my 1924 B&S Small Tools Catalog #29:
1667356116410.png

This differs only slightly from the Universal Divider #843, mainly in the type of point that is supplied. The Spacing Attachment has a center-punch type point, while the Divider has a much thinner, scriber-type point.

See below for the #843 from the same catalog:
1667356261835.png
 
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