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[SCIENTIFIC INSTRUMENTS -- ASTRONOMICAL ORRERY].Biblio.com

A chain gear driven Elementary Planetarium orrery composed of bright yellow Bakelite Sun wooden Moon and Venus and paper-globe Earth mounted on a blue-coloured moulded plastic moveable swing arm stamped with the maker’s name and gilt printed label affixed attached via a blue-coloured plastic pillar onto a circular blue-coloured moulded plastic base with seasonal monthly and zodiacal calendar.

1964rif. 61504Saginaw MI & Indianapolis IN: Trippensee Planetarium Co. George F. Cram Co. ca. 1964. Planetarium Orrery stands 12.5 in. tall at the top of the central Sun made from yellow plastic mounts on a 7.5 in. diameter moulded plastic base the model extends 22 in. when fully extended with Mercury on opposite side of the Sun from Moon extending out from central Earth. The Earth is a paper-covered 4 in. globe mounted on a gear mechanism mounted with wooden painted Moon mounted on metal rod as is the Venus globe which rotates around the moon all of which are driven by chains when handle underneath the swing arm is moved. Moulded plastic base has iron weight bolted underneath minor closed crack to the outer fore-edge of the base minor rippling to paint finish at base chipping to plastic bushing at base of Earth & Lunar globes still an exceptional piece in beautiful working condition. The Trippensee Planetarium tellurion or “Elementary Planetarium” has been produced for over 90 years and offers a wonderful astronomical mechanism depicting how day night and the seasons are caused by the movement of the Earth on its axis and its orbit around the Sun. It shows solar and lunar eclipses the motion of Venus in relation to the Sun and the rotation. The globe shows the major continents and cities with no internal political divisions except for the continental United States & Alaska shaded in green on the North American continent. The Tellurion or Tellurium was patented by Alexander Laing originally in 1897 as an educational device to be used in schools. He set up operations in Detroit MI and was later bought out by the Trippensee brothers who introduced their own version with a more reliable bicycle-style chain and gear drive and they sold them steadily. In order to further diversify the company they also built the Eddie Rickenbacker automobile for the E-M-F Company until 1927 when the Everitt Company went under. Trippensee brothers moved later to Saginaw Michigan where they occupied a three-story building at the corner of Cass and South Hamilton staying in business until 1999 when they were purchased by Science First. Their Orrery planetariums were made originally from wood and brass then Bakelite and finally plastics. See: Mark Theobald Coachbuiltcom Trippensee Manufacturing Company Rickenbacker Motors. Trippensee Planetarium Co., George F. Cram Co., unknown

Zephyr Used & Rare Books · Stati Uniti525,00 USD≈ 468,12 €

[SCIENTIFIC INSTRUMENTS -- MINING]. AINSWORTH, WilliamBiblio.com

Illustrating and describing the superior line of assay and analytical balances. Catalogue A. Manufactured by. . . .

1898rif. 52564Denver CO: Wm. Ainsworth 2151 Lawrence St. 1898. Oblong 8vo. 24 pp. Text illustrations & diagrams throughout. Pink-coloured printed softcovers cover art of assayers scale on front and back covers minor shelfwear minor tidemark to upper fore-edges slight sunning still VG- copy w/ original printed mailing envelope addressed to Joe Seliger 1868-1947 former stenographer secretary and metalworker for Honeyman Hardware Co. Portland OR. First edition of this very rare catalogue detailing the precision balances for mineral assayers manufacturers chemists jewelers and pulp paper makers. Ainsworth 1850-1917 began as a fine watchmaker steam engineer toolmaker and distiller who moved to Denver in 1877 where he initially began working for A.B. Ingols Jewelry. By the 1880s he was operating a jewelry store repairing balance scales for miners and assayers because at the time these were produced in England and required months of turnaround time for them to be shipped back and repaired prior to Ainsworth. Ainsworth developed his own excellent balance as presented in this catalogue which featured a shortened balance beam speeding up the assaying process and were much preferred by Western assay offices and miners. He continued to operate as a watchmaker and clock repairer but by 1895 began producing Brunton’s newly patented Pocket Transit which together with the balances proved to be a very successful combination with his first Catalogues A & B depicting both products issued in 1898. The company would continue to grow after his death and would be purchased by Xavier Science Corporation and now owned by the Denver Instrument Company. No copies located in Worldcat; See: John Shannon & Geraldine Shannon The Assay Balance: Its Evolution and the History of the Companies That Made Them -- William Ainsworth Robert A. Paselk Scientific Instrument Museum Humboldt State Univ. Dept. of Chemistry 1999. Wm. Ainsworth, 2151 Lawrence St., paperback

Zephyr Used & Rare Books · Stati Uniti275,00 USD≈ 245,21 €

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