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Expired
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Oskar Junghans
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Individual
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Individual
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Publication of GB191110241ApublicationCriticalpatent/GB191110241A/en
G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
G04B19/00—Indicating the time by visual means
G04B19/30—Illumination of dials or hands
G04B19/32—Illumination of dials or hands by luminescent substances
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Details Of Measuring Devices
(AREA)
Details Of Measuring And Other Instruments
(AREA)
Electric Clocks
(AREA)
Abstract
10,241. Junghans, O. April 27. Illuminating, means for. - In indicating- devices such as watches or compasses, comprising a stationary part and one or more movable parts, a substance that is luminous in the dark is provided on the underside only of the movable part or parts a.
GB191110241D1911-04-271911-04-27Improvements in and relating to Indicating Devices.
ExpiredGB191110241A
(en)
Improved Fittings for Enabling the Hands, Numerals and Division Marks on the Dials of Watches, Clocks and other Indicating Apparatus to be Easily and Quickly Rendered Permanently Luminous in the Dark.