Ainsworth Solar Transit – S/N 2946 – Nice Condition – Circa 1915
This is a very nice solar transit made by Ainsworth, an instrument maker based in Denver Colorado. The solar attachment is a Saegmuller unit, and the transit was made in about 1915 based on its serial number. Comes with a tripod but not box.
Country of manufacture
This is a really neat circa 1915 Ainsworth Solar Compass. Ainsworth had a unique approach to attaching a Saegmueller Solar unit to a transit. Ainsworth would modify a Saegmueller solar unit to fit on a mining transit designed for a second scope and counterweight (like Berger used). I’ve asked around and Ainsworth was apparently the only maker who took this approach.
Note that the counterweight loop is only a half loop. I have no idea what that’s about – never seen that before.
This Ainsworth solar transit has an earlier style Saegmueller solar unit, which is interesting. The Ainsworth manual shows later style a Saeg unit. The counterweight on my unit also looks larger than what the manual shows. I suspect that the purchaser of this Ainsworth might have already had a Saeg solar unit and had Ainsworth modify his Saeg unit to fit on the this Ainsworth transit. Don’t know for sure of course – maybe Ainsworth had an old Saeg unit sitting on the shelf.
Either way, this is a really neat and very solar transit.
No box, but has a tripod (probably not original).
9.5 inches telescope. 2.5 inch compass needle. Serial number 2946. Missing one vernier glare guard. Compass hard to read – small 2.5 inch needle
The levels contain liquids.
Optics work on both scopes. No crosshairs on the big scope. The Saeg might have crosshairs – hard to tell. Solar unit wobbles a bit – needs tightening.
Please see my Ainsworth Instrument Maker Webpage for more information about Ainsworth.
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The Compleat Surveyor specializes in rare instruments and books related to land surveying. This initially was a family business - my father (F. D. Uzes) was a noted surveyor, collector and author (Illustrated Price Guide To Antique Surveying Instruments and Books - published in 1980). Having spent a lifetime surrounded by old instruments and books, I now run the business myself. I use my website (www.CompleatSurveyor.com) to both sell instruments and provide historical information related to land surveying.