Shunt activated pulse generator
US4758742A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Jul 14, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/45
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A pulse generator employs a Wiegand wire module within two soft iron ferro-magnetic elements. Four magnets having appropriate polarities are positioned on faces of the ferro-magnetic elements to provide first and second magnetic circuits. The flux in these two magnetic circuits is collected, conducted and guided by the ferro-magnetic elements toward an air gap between the two guide elements. The center portion of the Wiegand wire is at the air gap. Cylindrical cavities in these two guide elements shield the ends of the Wiegand wire to minimize the incidence of external flux from the Wiegand wire. Saturation of the flux at the air gap between the two guide elements causes leakage flux to be incident on the Wiegand wire. The two magnetic circuits created by the magnets are approximately equal in magnitude and opposite in direction at the Wiegand wire. As a consequence, in the normal state, these two magnetic circuits do not affect the state of the Wiegand wire. When a soft iron ferro-magnetic shunt is brought adjacent to the two magnets which determine a first one of the magnetic circuits, an increase of flux in that first magnetic circuit switches the state of the Wiegand wire to a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.