Portable device for generating and tuning a whole tone scale
US3948140A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1974 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Aug 28, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10G7/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A portable device for generating and tuning a whole tone scale comprising means for generating a signal having a frequency of a reference tone scale, first means for shaping an output of the signal generating means and means for converting the output of the first shaping means. The device further includes means for converting the audible tone of a musical instrument to be tuned into a train of electrical signals, means for frequency multiplying and dividing input signals, second means for shaping the output of the converting means, logic means for logically comparing the outputs of the first and the second shaping means to generate a train of signals each having a width corresponding to the frequency difference between the outputs of the first and the second shaping means, and means for indicating the output of the logic means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.