Alarm signaling time indicating mechanism for an alarm clock
AssigneeSeikosha Co., Ltd.
InventorsMasuo Ogihara, Tadashi Ishikawa
Life of this patent
Estimating the term…
Abstract
An hour detection wheel and a minute detection wheel for detecting an alarm signaling time are provided in combination with an hour time wheel and a minute time wheel respectively. An alarm signaling time indicating block having a minute indication drum connected to an alarm signaling time setting member and marked with minute-scale alarm signaling time graduations and an hour indication drum marked with hour-scale alarm signaling time graduations and adapted to be turned intermittently by the minute indication drum is disposed outside a clock movement having the hour and the minute detection wheels and the minute indication drum interlocked by gear trains with the hour and the minute detection wheels.
Claims10
In an alarm clock having an hour time wheel, a minute time wheel, indication hands for the analog indication of time, and a time signaling mechanism having an hour detection wheel and a minute detection wheel cooperating with said hour time and minute time wheels, respectively, so that the time signaling mechanism is actuated upon the coincidence of the respective phases of two sets of said time wheels and said detection wheels with each other;
- an alarm signaling time indicating mechanism comprising:
- a minute indication drum interlocked rotatably with an alarm signaling time setting member and having minute-scale alarm signaling time graduations marked on the circumference thereof and connected through gear trains comprised of a plurality of transmission wheels with both said detection wheels, and an hour indication drum having hour-scale alarm signaling time graduations on the circumference thereof and connected to be rotated intermittently by said minute indication drum;
- wherein said minute indication drum, said hour indication drum and some of said transmission wheels are assembled in a block;
- and means attaching the block to a clock movement including both said time wheels and both said detection wheels.
An alarm clock having an analog time display and a digital alarm time display, comprising:
- an analog clock movement for keeping time and displaying time in analog form, the analog clock movement comprising a rotatably mounted hour time wheel, a rotatably mounted minute time wheel, means for rotationally driving the hour and minute time wheels in timed relation, time-indicating means connected to be rotationally driven by the hour and minute time wheels to indicate time in hours and minutes in analog form, and adjustably settable alarm time signaling means coacting with the hour and minute time wheels for detecting a preset alarm time in dependence on the rotary positions of the hour and minute time wheels and producing an alarm signal denoting the occurrence of the preset alarm time;
- and a digital alarm time display unit connected to the analog clock movement for displaying a preset alarm time in digital form, the digital alarm time display unit comprising a rotatably mounted hour-indication drum having digital hour markings about the circumference thereof, a rotatably mounted minute-indication drum having digital minute markings about the circumference thereof, and alarm time setting means for effecting angular displacement of the hour-indication and minute-indication drums to enable the same to display in digital form a preset alarm time and for effecting setting of the alarm time signaling means to enable the same to detect the preset alarm time.
Dependencies are inferred from the claim text.