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US 6,466,518 B1Granted
Time measurement device
AssigneeSeiko Epson Corporation
InventorsHidehiro Akahane, Kenichi Okuhara, Akihiko Maruyama, Nobuhiro Koike
Life of this patent
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Abstract
A time measurement device includes a first motor (1300) for indicating standard time, a second motor (1400) for indicating a chronograph, a generator (1600) which generates driving power for driving the first and second motors by converting mechanical energy into electrical energy, and a zero reset mechanism (1200) for mechanically resetting the chronograph to zero. A compact time measurement device, operable from a low power, is thus provided.
Claims12
A time measurement device comprising:
- a first motor for driving a standard time indicator,
- a second motor for driving a chronograph,
- a generator which generates a first voltage signal,
- a secondary power source charged by the first voltage signal,
- a voltage multiplication circuit which multiplies the first voltage signal by a determined multiplication rate to generate a second voltage signal,
- a primary power source that stores the voltage of the second voltage signal and outputs a third voltage signal,
- a voltage multiplication control circuit which determines the multiplication rate by which the first voltage signal is multiplied based on the third voltage signal, and
- a zero reset mechanism for mechanically resetting the chronograph to zero.
5 more elements
A time measurement device comprising:
- a first motor for driving a standard time indicator,
- a second motor for driving a chronograph,
- a generator, and
- a zero reset mechanism for mechanically resetting the chronograph to zero, the zero reset mechanism comprising a zero reset lever for resetting the chronograph to zero and an operating cam, arranged approximately in the center of a body, for operating the zero reset lever.
1 more element
A time measurement device comprising:
- a first motor for driving a standard time indicator,
- a second motor for driving a chronograph, and
- a zero reset mechanism for mechanically resetting the chronograph to zero, the zero reset mechanism comprising a zero reset lever for resetting the chronograph to zero and an operating cam, arranged approximately in the center of a body, for operating the zero reset lever.
Dependencies are inferred from the claim text.