Abstract: A roller jumping timepiece display mechanism, each display of which includes a roller and/or a combined roller including two rollers internal to each other, held in the rest position by first elastic return means, at least one display is movable in rotation controlled by the movement of at least one lever whose fall is controlled or prohibited by at least one cam driven by a movement, and at least one trigger or correction lever is arranged to bearingly cooperate simultaneously with two cams towards which it is returned by second elastic return means.

Abstract: Disclosed is a display structure in which an insertion opening, slide grooves, a first fitting portion and a ridged portion along which the display plate bends when the display plate is bent arranged in the loading sections of a support body in a suitable manner to ensure that when the display plate is inserted into or removed from the loading unit, a force is exerted on both sides of the display plate in either the direction from the display surface side to the rear surface side thereof or the direction from the rear surface side to the display surface side thereof, and a force is exerted in another direction at the center region of the display plate. As a result of configuring in this manner, the display plate deforms so that the entire display surface side comes to have a convex or concave shape, thereby allowing the display plate to be attached to or detached from the support body without forcible localized deformation of the display plate.

Abstract: A perpetual calendar, particularly a perpetual calendar that can be electrically operated to show the date, the week-day, and the month. The calendar comprises a round wheel or case driven by a gear to rotate one cycle per 24 hours, and the peripheral edge of the round case has a cam for contacting a micro-switch which can trigger a circuit to drive a motor for rotating an eccentric wheel. A retractable rod can be driven by a pin on the eccentric wheel and move downwards to pull the date pulling rod and the week-day pulling rod downwards, and then a ratchet wheel will be driven to rotate, and a positioning piece in the notch of the ratchet wheel will cause the loose-leaves showing date and week-day to advance.

Abstract: This invention is a combination of known elements for a new use. This is an adaptation of the old shadow light principle coupled with time to cause three different light apertures to be aligned in a lighted window effect, thereby indicating a previously programmed marking to remind the owner of hourly, daily or weekly radio, television programs, appointments or meetings.