U.S. patents available from 1976 to present.
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Power-generating device, charging method and clocking device

Patent 6154422 Issued on November 28, 2000. Estimated Expiration Date: Icon_subject February 9, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Two-terminal transistor rectifier circuit arrangement
Patent #: 4519024
Issued on: 05/21/1985
Inventor: Federico ,   et al.

Electronic wristwatch with generator
Patent #: 5001685
Issued on: 03/19/1991
Inventor: Hayakawa

Power supplies for electronic device
Patent #: 5130960
Issued on: 07/14/1992
Inventor: Hayakawa

Bridge rectifier circuit having active switches and an active control circuit
Patent #: 5510972
Issued on: 04/23/1996
Inventor: Wong

Timepiece including an electric power generator
Patent #: 5835456
Issued on: 11/10/1998
Inventor: Farine, et al.

Electrolytic manganese dioxide, process for preparing the same, and manganese dry cell
Patent #: 5866278
Issued on: 02/02/1999
Inventor: Sumida, et al.

Chopper-amplifier for the voltage of a photovoltaic power source, in particular for a timepiece Patent #: 5982157
Issued on: 11/09/1999
Inventor: Wattenhofer, et al.

Inventors

Assignee

Application

No. 020702 filed on 02/09/1998

US Classes:

368/204, Electrical320/166, CAPACITOR CHARGING OR DISCHARGING323/222, Using choke and switch across source323/282, Switched (e.g., switching regulators)363/89, With transistor control means in the line circuit363/127Transistor

Examiners

Primary: Miska, Vit W.

Attorney, Agent or Firm

Foreign Patent References

  • 6-300865 JP. 10/12/1994
  • 9-131064 JP. 05/12/1997
  • WO 97/24795 WO. 07/12/1997

International Classes

G04B 001/00
G04C 003/00
H02N 007/217
G05F 001/40

Foreign Application Priority Data

1997-02-07 JP

Abstract

A power-generating device can include a dynamo for converting kinetic energy into electrical energy, a switch capable of short-circuiting output terminals of the dynamo, a controller capable of controlling the switch, a rectifier for rectifying an output of the dynamo, and a charging portion capable of storing the output of the dynamo. The controller can perform chopper control for cyclically turning on and off the switch in accordance with a PWM signal. Where an electromotive voltage of the dynamo is lower than a charged voltage, a boosted voltage can be produced by chopper amplification. If the electromotive voltage is low, it can be charged in the charging portion if the boosted voltage is increased to a sufficient level prior to charging.

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