Digital time error measuring arrangement
US3946592A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1974 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Apr 5, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04D7/1214
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention resides in an improved time error measuring device or test bench for watches. The device includes a sensing microphone for sensing the stepping movement of the watch under test and in the form of a series of electric signal pulses. It further includes a range selector adapted for selecting a proper range depending upon the thus sensed stepping signal pulse series. Time error measuring means is utilized for detecting occasional time error of the watch by comparing the sensed stepping pulses with a standard clock pulse series and at the precision attributed to a selected measuring range. All these operations may be carried out in a fully automatic manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.