Wrist-watch with selective time-display

Claim 2

An improvement in a wrist-watch wherein display of the time requires the use of electric power from an internal electric battery and said time is to be selectively displayed by a timedisplay means, said improvement comprising a plate movably mounted at the rear of said watch, and switch means coupled to said plate and adapted to activate or deactivate said timedisplay means in accordance with the angular position of said plate, whereby twisting of the arm of the wearer of said wristwatch to bring said watch into view causes, in sequence, twisting of the part of the wearer''s skin in contact with said plate and movement of said plate in a direction such as to activate said time-display means.

Claim 3

The improvement as defined in claim 1, wherein said plate is spring-biased to a position in which said time-display means is inactivated.

Claim 4

The improvement as defined in claim 1, wherein said plate is movably mounted for rotation, said rotation causing activation of said time-display means.

Claim 5

The improvement as defined in claim 3, wherein said plate has an arcuate groove therein, said groove tapering in depth from one end to the other, and said switch means having a first pin movable in a direction perpendicular to said plate and being biased to make continuous contact at its outer end with the bottom of said groove, whereby rotation of said plate in one sense or the other causes said first pin of said switch to move axially in one direction or the other and to make or break contact in said switch to activate or deactivate said time-display means.

Claim 6

The improvement as defined in claim 3, wherein said plate is spring-biased to a position in which said time-display means is inactivated and has a second arcuate groove therein, a pivotable arm is fixably mounted on the interior of said plate, one end of said arm spanning said second groove, said watch has a rear cover, a second pin is mounted on the exterior of said rear cover so that said second pin projects into said second groove between said arm and one end of said second groove, mechanical contact between said second pin and either of said arm and said one end of said second groove establishing the rotational excursion limits of said plate.

Claim 7

The improvement as defined in claim 5, wherein said arm is spring-biased toward said plate, said arm is fixedly joined to an axle, the other end of said arm has the form of a gear sector, a third pin is disposed on the interior of said plate in a position such as to lock said arm in a given position by engaging teeth of said gear sector, said plate has an opening into which said axle projects far enough so that pressure applied externally in an axial direction to said axle can life said arm away from said third pin, and the outer end of said axle is shaped to make it possible to rotate said axle from the exterior of said plate, thereby making it possible to free said arm from said third pin, change the position of said arm with respect to said second groove, lock said arm by means of said third pin in a new pOsition and adjust the limits of the rotational excursion of said plate.