Electromechanical pulse generator
US5380965A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Jul 7, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/004
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromechanical pulse gereator having a purely mechanical mode of operation for microelectronic equipment, e.g. volume control in hearing aids, consisting of a housing formed by a fixed base portion in which a shaft is fixedly mounted and a timing wheel is rotatably mounted around the shaft, the timing wheel having the form of a downward facing open cylinder and being fixedly connected to a casing whci forms an external handle. The inner cylinder surface of the timing wheel is provided with grooves engaging with a protrusion of a circular carrier rotatably mounted around the shaft. A U-shaped contact spring has members which are individually imparted an oscillating movement between contact pairs A-B-C and A-D-E, respectively, by the turn of the timing wheel in one or the other direction via the carrier which can only move over a pre-determined circular section, so as to generate digital pulse trains. A locking device prevents the carrier from moving beyond the pre-determined circular section and causes the protrusion to continuously engage with the grooves by the turn of the timing wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.