Deffez Louis François
Contenu
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Nom
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Deffez Louis François
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Date de naissance
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29 september 1822
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Lieu de naissance
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Paris
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Couverture temporelle
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2/2 19th century
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Couverture spatiale
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Paris
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Société
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Paris
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Biographie
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Formed by Pixii, he started his own business in 1852. He made Ramsden-type electro-static machines and their accessories for school and college use and air-pumps specially designed for electrical demonstrations which he showed at the 1881 International Exhibition of Electricity.1 He took his son into partnership in1896 (2). the business continued as 'Atelier Louis Deffez' until at least 1949, having producing varied measuring instruments such as that for the resistance of materials by C. Chenevaux (1949), of ionisation (1910) and Curie's electrometer for the measure. of radioactivity (1949).
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Notes biographiques
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1 Cat 1881, 11, bo 7.
2. Marcelin
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Bibliographie
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The Radium, 1910. SGOIP. 1949.
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Adresse ; enseigne ; période ; source
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34, rue Saint Severin Paris.
26, rue Boulard, Paris.
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Identifiant
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1464
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ark:/18469/1rdjx