Signaling time detecting device for leaf type digital clock
AssigneeSeiko Koki Kabushki Kaisha
InventorsMasuo Ogihara, Kozo Chimura, Nobuo Shinozaki, Yoichi Seki
Life of this patent
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Abstract
First and second detecting wheels, the phases of which can be varied in accordance with the setting of an alarm signaling time, are provided in correspondence to an hour time wheel and a minute time wheel respectively. Among a plurality of leaves adapted for digitally indicating the minute time, some of the leaves, which occur at a constant interval of minutes, are each provided with a projection, and a third detecting means is provided to detect the presence or absence of this projection. An alarm device is actuated when the first and second detecting wheels and third detecting means are concurrently actuated.
Claims8
In a signaling time detecting device for a leaf type digital clock, including a hour time wheel and a detection plate which corresponds to said hour time wheel and whose phase changes in accordance with the setting of an alarm signaling time so as to move said detection plate in order to actuate an alarm device when said hour time wheel and detection plate are brought into coincidence in phase with each other, said time detecting device comprising:
- a first detecting lever adapted to cooperate with said detection plate;
- a projection provided on each of some of a plurality of minute leaves, said some leaves occurring at a constant interval;
- a second detecting lever adapted to cooperate with any one of the projections and to be driven by said first detecting lever;
- and a switch adapted for rendering the alarm device operable in response to the action of either said first or second detecting lever.
In a leaf type digital alarm clock, the combination comprising:
- a minute leaf drum mounted for rotation;
- minute leaves on said minute leaf drum for visually displaying minutes as said minute leaf drum rotates, wherein at least one of said minute leaves has a protrusion extending from a marginal edge thereof;
- an hour leaf drum mounted for rotation;
- hour leaves on said hour leaf drum for visually displaying hours as said hour leaf drum rotates;
- a detection plate positionable at different positions corresponding to different alarm times, said detection plate cooperative with said hour leaf drum for shifting position when the hours displayed by said minute leaves are the same as the hours of the alarm time corresponding to the position of said detection plate;
- a first detecting lever mounted for pivotal movement and having a first end positioned by said detection plate and having a second end;
- a second detecting lever mounted for pivotal movement and having a first end positioned by a protrusion of the minute leaf being displayed and having a second end engaged with the second end of said first detecting lever, said first and said second detecting levers being positioned such that said first detecting lever prevents said second detecting lever from being released and pivoting in a direction to move said first end of said second detecting lever toward said minute leaves before said detection plate has shifted position, and such that said second detecting lever prevents said first detecting lever from being released and pivoting in a direction to move said first end of said first detecting lever toward said detection plate before said second detecting lever first end has been released from the protrusion of the minute leaf being displayed;
- and alarm means including a switch controlled by one of said detecting levers for emitting an alarm signal when the one of said detecting levers is released.
Dependencies are inferred from the claim text.