Pulse motor
US3958167A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1973 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Nov 30, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G5/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A reversible pulse-motor driving circuit comprising a steady driving circuit composed of an oscillator circuit, a frequency divider circuit, a waveform conversion circuit, and a driving circuit, and a fast correction driving-circuit composed of a fast correction set-circuit, a first gate circuit, a detector circuit, a normal and reverse discrimination circuit, a conversion change-over circuit, a pulse selector circuit, a first memory circuit, a second gate circuit and a second memory circuit, whereby a user can hear a time signal delivered from a calculation circuit and only push a pushbutton to rotate the pulse motor in a reverse direction when the second hand is ahead of the correct time, and rotate the pulse motor in a forward direction when the second hand is lagging with respect to the correct time, and the use of a frequency higher than the steady driving frequency permits a fast setting of the second, minute or hour hand to the correct time. A reversible pulse motor for use in timepiece and more particularly in wrist watch is disclosed which can be rotated in forward and reverse directions by the driving circuit, which is small in size and which can operate with a minimal co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.