FR392144A - Sablier à fonctionnement circulaire et automatique pour appareils comburateurs applicables aux foyers des générateurs à vapeur et autres
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Sablier à fonctionnement circulaire et automatique pour appareils comburateurs applicables aux foyers des générateurs à vapeur et autres
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LOUIS MAHIEU FILS
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LOUIS MAHIEU FILS
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G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
G04F1/04—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity
G04F1/06—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock
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FR392144D1907-09-161907-09-16Sablier à fonctionnement circulaire et automatique pour appareils comburateurs applicables aux foyers des générateurs à vapeur et autres
ExpiredFR392144A
(fr)