August. Tuning Fork Clock. Louis-Clément Breguet

Discussion in 'Musée international d'horlogerie Centre d'étude' started by CET MIH, Aug 10, 2009.

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  1. CET MIH

    CET MIH Museums

    Mar 26, 2009
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    La Chaux-de-Fonds
    Country Flag:
    Louis-Clément Breguet
    Paris

    Tuning-fork clock

    Nickel-plated metal, brass, steel
    Height: 46 cm. Width: 26 cm. Depth: 19 cm.
    Dial signed: BREGUET N° 1150 BREVETE SGDG
    Case signed: BREGUET
    Initials PK at base of diapason.

    Finished in 1868


    The nickel-plated metal case has glass on all four sides.

    The annular dial is engraved with Roman numerals for the hours and Arabic numerals for the five minutes, with a small eccentric seconds dial in the upper part.

    The clock movement was built on the principles set down in patent n° 73414 registered on 20 October 1866 by Louis-Clément Breguet. It has two barrels, a train and an escapement. The regulating organ is a steel tuning-fork, two hundred and fifty millimetres in length and vibrating at one hundred hertz. One of its arms touches the escapement, whose function is to keep it vibrating.

    History:
    1967 (purchased).
    Finished in 1868.

    Exhibitions:
    1867, Paris
    1997, MIH, p. 33, illus.

    Bibliography:
    Comptes Rendus de l’Académie des Sciences, volume LXIII, 1866, p. 991.
    George Sire, Rapport sur l’horlogerie à l’Exposition Universelle de 1867, Paris, s.d.
    Frédéric Marle, "La pendule à diapason de Louis Breguet", Annuaire de la montre suisse, 1964, 1965.
    MIH, 1974, p. 131, illus.
    Breguet, 1997, p. 335, illus.
     

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