Alarm device for a horological instrument

Claim 1

An alarm-setting device for a horological movement, the movement including an electrically operated alarm, a source of electrical current and a watch dial mounted on the movement, said dial having time markings thereon; said setting device comprising: an electrically nonconductive rotatable alarm set disc positioned within the movement, said disk having an indicator marking on its top face, and a contact point and circular contact rack on its bottom face, said contact point being electrically connected to the contact track, said disk also having a periphery which comprises a toothed ring gear; an electrically conductive resilient member mounted on the movement and in contact with the track; a movable alarm set stem having a gear mounted thereon, said alarm set stem being movable to mesh said mounted gear with said ring gear and to rotate said disk so that the indicator marking on its top face can be selectively matched with any of the time markings on the watch dial to set the alarm; a rotatable hour wheel having a contact means thereon; said alarm, source of current, resilient member, contact point on the bottom face of the disk and said contact means on the rotatable hour wheel constituting a normally open circuit; means for rotating the hour wheel to bring the contact means thereon into contact with the contact point on the alarm set disk, thereby closing the circuit and activating the alarm.