~COCHRANE’S PATENT OPTICAL PYROMETER IN CASE c.1900~

~COCHRANE’S PATENT OPTICAL PYROMETER IN CASE c.1900~

$200-150 GBP (OBO) + postage

A good optical pyrometer for the determination of the temperature of molten steel?

Dimensions

11 x 5 x 3

Circa

1900-1920

Country of manufacture

UK and Ireland

Categories: Physics & Chemistry, Engineering antiques, Other Technology Antiques, Patent & Salesmans Samples, Tools

Description

A good optical pyrometer ( Cochrane’s patent) c.1900. Signed address (in block letters) and serial number, this bright brass instrument was used to determine temperature ( in degrees C) of heat sources and molten metals. Termed  “THE WEDGE”, it consists of an 11″ (22 cm.) x 1″ (2.5 cm.) rectangular body tube, two perpendicular lenses ( one draw tube, the other rack and pinion) to adjust focal length while observing a racked scale from 550-1350 C. Everything works, red and infrared spectral analysis of molten/hot incandescent objects. Optics dusty but accurate. Cased in a mahogany box 10 1/2 x 5 x 3″ with blue velvet liner and two hooks. 

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CA ScientificaOpticae

Scientifica Opticae

Mark Hacking (Scientifica Opticae Inc.) has been an avid collector/dealer for over 30 years. A former Science teacher, he has an innate love for anything natural or mechanical. Specializing in optical (microscopes, telescopes), surveying, medical, weighing and drawing instruments, he is an active participant of the Scientific Instrument Fair in London. Living in Stratford, Ontario, Canada, with his wife and two children; Mark looks forward to meeting as many fellow collectors as possible, and has a worldwide following on eBay (Sciopti).

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