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Scientific Instruments - A H.W.Sullivan Ltd condenser variable standard No.1, fitted mahogany case; a Philips Millivoltmeter GM6014; An Evershed & Vignoles microamperes meter, fitted case; Wheatstone Bridge galvanometer; Dr. B. Lange Multiflex-Galvanometer, cased;A Dawe A.F.Analyser Type 1461A, fitted metal case; H Tinsley & Co. Ltd galvanometer Type 4237; a Ferranti volt meter, cased; Advance off air frequency standard Type OFSI; etc qty
A quantity of small and hand held early 20th Century voltmeters including a 1880's Ayrton and Perry's Direct reading spring ammeter on mahogany base, 1919 Eye of Cambridge galvanometer in mahogany case with brass screw-down terminals, an unmarked older example, an Electric Construction Company Ltd, London mahogany cased voltmeter No 302 and more (11)
A mixed lot including binoculars, measuring instruments etc to include a pair of WWI period Triëder Binoculars by CP Goerz, Berlin (X6) in original leather case, a pair of Wray Magniv 8 x 30 in leather case, a pair of leather coated unnamed field binoculars, a Soviet binocular microscope N 721635 an early microphone by Standard Electric and an Eversheds Gravity-ammeter and WG Pye & Co instrument, a cast iron small press, a Nalder & Bro brass and bakelite instrument, a Philip Harris & Co No 6421 galvanometer, Gambrell bros Ltd, London no 102 galvanometer, a Nitrogen filled current dial, two Cambridge Instrument Co. Galvonometers [15]
Scientific Instrument; Ballistic Galvanometer, circa 1920, an early measuring instrument used for the measurement of Electric current by using a compass needle to compare a magnetic field generated by the unknown current to the magnetic field of the earth, the magnetic time to rotate the needle in the horizontal plane
A RARE COMPASS GALVANOMETER BY SIEMENS & HALSKE, BERLIN, CIRCA 1870 constructed in lacquered brass, the compass with 4in. silvered dial signed as per title and numbered 183 , black steeled needle with pivot and needle clamp, secured to rotating pedestal with numbered electrical contacts behind, secured to porcelain base numbered 43211234 , with threaded terminus points to circular field, mounted to tri-form adjustable base with threaded securing clamp -- 11in. (28cm.) high
A large Sullivans mirror galvanometer of 32cm in height - made by H W Sullivan of London Circa 1930 - one broken glass spirit level to base but overall excellent condition with good lacquer to brass - to also include a Gambrell Bros Ltd, Patt3000 lacquered brass Galvanometer of unusually small design
A large Sullivans mirror galvanometer of 32cm in height - made by H W Sullivan of London Circa 1930 - one broken glass spirit level to base but overall excellent condition with good lacquer to brass - to also include a Gambrell Bros Ltd, Patt3000 lacquared brass Galvanometer of unusually small design
Mahogany cased Galvanometer, silvered dial inscribed Telegraph Works, Silvertown, London, wih brass fittings, H12cm, and a section of a Telephone number selector, No.20201, on mahogany plinth, labelled 'Bradford Rota 1947-1988 E A Gray', H17.5cm (2) Condition Report Click here for further images, condition, auction times & delivery costs
A mid to late 19th century oak cased telegraph signal indicator and galvanometer, the silvered dial stamped 'G.P.O 4764', height 18cm. CONDITION REPORT: Extensive surface wear to outer case with scratches, nicks and one sizeable chip to top, some wear to dial with dust, discolouration and patches of dirt. Chip to the glass.
A mid to late 19th century oak cased telegraph signal indicator and galvanometer, the silvered dial stamped 'G.P.O. 11144', height 18cm. CONDITION REPORT: There are no numerals or markers to the dial, extensive surface wear to the case with a small chip to the top and further scratches and nicks, surface dirt and wear dial.

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531 item(s)/page