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Stone Polishing Device, Patent Model? [169055]

Currency:USD Category:Collectibles / Tools, Hardware & Locks Start Price:10.00 USD Estimated At:500.00 - 1,000.00 USD
Stone Polishing Device, Patent Model?  [169055]
SOLD
80.00USDto y******1+ buyer's premium (20.00)
This item SOLD at 2023 Jul 28 @ 12:36UTC-7 : PDT/MST
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Patent model(?) for a stone polishing device invented by Mrs. Gertrude S. (Reynolds) McMullen in 1909. Brass components include a 16.5-inch tall square pillar with rulings on 1/16th of an inch and two sliders that can be positioned up and down along the pillar. Each slider has a pivoted jig that appear to have held a cylindrical rod at a specific angle, as indicated on the rotating scale from 0 to 90 degrees. The logo of a cat (tiger?) appears on this pivot with the initials // S.T. Co //. This is the Southwest Turquoise Company, where McMullen developed this gem and stone-cutting device. It's precise operation is unknown to us, because many of the original pieces are no longer attached. Stamped on the base of the device is // GERTRUDE S. MCMULLEN / INVENTOR / PATD-6-15-09 //. See articles at https://ladailymirror.com/2013/05/26/womens-history-gertrude-s-reynolds-mcmullen/.