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compound engine

compound engine

Datecirca 1765
Inventory Number0076
ClassificationDemonstration Apparatus
Subject
    Maker English ?
    Cultural Region
      Dimensions15.5 x 12.5 x 9.5 cm (6 1/8 x 4 15/16 x 3 3/4 in.)
      cog wheel: diameter 11 cm (4 5/16 in.)
      Material
        Bibliography
        DescriptionTwo triangular plates held together by turned brass rods support a cog wheel, which rotates on a brass axle. A vertical worm gear is put against the cog wheel. A handle (missing) would have been used to turn the worm gear, which in turn would put the wheel in rotation.

        There is an old Harvard number stamped twice on one of the triangular plates: 18 21.
        Signedunsigned
        Curatorial RemarksThis instrument appears in the John Winthrop inventory after he died in 1779. It is described as either "A combination of the Screw & Pulley (Brass)" or "A Combination of all the mechanic Powers (brass) fitted to an inclined plane".
        table-clamping vertical globe electrical machine - gearbox
        table-clamping vertical globe electrical machine - gearbox
        Edward Nairne
        Date: circa 1770
        Accessories: glass globe (DW0508c) stored separately.
        Object number: DW0508a
        table-clamping vertical globe electrical machine - arm
        table-clamping vertical globe electrical machine - arm
        Edward Nairne
        Date: circa 1770
        Accessories: glass globe (DW0508c) stored separately.
        Object number: DW0508b
        Gramme magneto-electric machine
        Gramme magneto-electric machine
        Zénobe T. Gramme
        Date: 1870-1875
        Object number: DW0084
        device with clamps rotating at different speeds ?
        device with clamps rotating at different speeds ?
        American
        Date: 1870-1930
        Object number: 1996-1-0424
        French physics demonstration print
        French physics demonstration print
        Librairie Hachette & Cie
        Date: 1856
        Object number: 2008-1-0288
        The first image in this series represents a giant, double-plate electrostatic generator, which …
        collection of 51 watercolors of scientific instruments
        John Cuthbertson
        Date: 1770-1815
        Accessories: brown storage box, descriptive tag, thin strip of paper in box with the inscription "lucernal microscope" in David P. Wheatland's handwriting (which refers to figs. 47-48 and 51 in this series), page from the book "Old Science and Medicine" with a photographic copy of the first print from this series, entitled "The Large Electric Machine at Haarlem."
        Object number: 1998-1-1087
        Wheatstone-type apparatus for the production of vibratory movements
        Wheatstone-type apparatus for the production of vibratory movements
        Rudolph Koenig
        Date: circa 1865
        Object number: 1997-1-0901
        electric motor
        electric motor
        Breton Frères
        Date: circa 1850
        Object number: DW0394
        electric motor timer
        electric motor timer
        French
        Date: circa 1880
        Accessories: protecting case with glass window
        Object number: DW0095
        Sir William Thomson's quadrant electrometer
        Sir William Thomson's quadrant electrometer
        James White
        Date: circa 1881
        Object number: 1997-1-0647
        electric motor
        electric motor
        French
        Date: circa 1880
        Object number: DW0077
        Zeiss stand Ic photomicrographic compound microscope
        Zeiss stand Ic photomicrographic compound microscope
        Carl Zeiss, Optische Werkstätte, Jena
        Date: circa 1902
        Accessories: oculars (5); objectives (5); microplanar objectives (2); iris diaphragm; abbe condenser; collars and sleeves for photography; parts box; Leitz object micrometer (1308b); cardioid condenser (1308d); immersion oil bottle (1308c) ; Leitz erecting prism (1308e); standing case with key
        Object number: 1308a