Electronic chronograph watch having analog and digital display of measured time periods
AssigneeNouvelle Lemania SA
InventorsAlbert Piguet, Jean-Daniel Dubois
Life of this patent
Estimating the term…
Abstract
A motor actuates a wheel train which drives center hour and minute hands as in an ordinary analog-display watch. Another motor actuates a chronograph train which drives a chronograph sweep seconds-hand, a minute-register hand, and an hour-register hand offset toward 6 o'clock. A lever actuates a column wheel which starts and stops the second motor by means of a control lever integral with a stem. A hammer resets the chronograph gears. An electronic circuit comprises a liquid-crystal display element which displays the hundredths of a second when the chronograph is running or the date when the chronograph is not running.
Claims10
A chronograph-watch comprising:
- a gear train formed of a plurality of rotating members in meshing engagement;
- a set of rotating displaying parts attached to said plurality of rotating members of said gear train;
- friction couplings between each one of said displaying parts and a corresponding one of said rotating members;
- a step motor driving said gear train;
- a time counting electronic circuit having an output connected to said motor;
- a first switch connected to a first input of said counting circuit for starting and stopping said counting;
- a second switch connected to a second input of said counting circuit for resetting said counting;
- a start-and-stop mechanism provided with a first control pusher and a brake member, said brake member acting on said gear train for holding said gear train at rest, and said brake member and said first switch being controlled by said first pusher;
- and
- a return mechanism provided with a second control pusher and a set of hammer means for acting on said displaying parts, said hammer means and said second switch being controlled by said second pusher.
Dependencies are inferred from the claim text.