Chronograph watch
AssigneeETA SA Fabriques d'Ebauches
InventorAlphonse Bron
Life of this patent
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Abstract
A chronograph watch provided with a control arrangement for the three functions of start, stop and reset to zero. The purpose of the invention is to provide a more judicious distribution of the elements of the chronograph mechanism over the entire surface of the watch. This purpose is attained by means of a watch characterized in that it comprises a start and stop cam (48) and a reset-to-zero cam, both of these cams being constituted by superposed concentric rings arranged at the periphery of the watch movement, in that both of these cams (48, 49) exhibit respectively ratchet teeth (97) or notches (98a, 98b) on their outer periphery on which act two levers (100, 101) to drive the cams (48, 49) in rotation and teeth (96) or notches (99) on their inner periphery acting on the control levers for the gearing forming the chronograph mechanism.
Claims8
A chronograph watch having a chronograph mechanism comprising gears, a first push button controlling the starting and stopping of the chronograph and acting on a start and stop lever, a second push button controlling the reset to zero of the chronograph and acting on a reset-to-zero lever, a start and stop cam and a reset-to-zero cam, both such cams being constituted by superposed concentric rings arranged at the periphery of the watch movement, both such cams respectively exhibiting ratchet teeth or notches on their outer periphery on which act two levers to drive such cams in rotation, and both such cams respectively exhibiting teeth or notches on their inner periphery acting on control levers for the gearing constituting the chronograph mechanism.
Dependencies are inferred from the claim text.