Latching relay
US4628289A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Oct 11, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H51/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A latching relay includes a housing and a coil secured to the housing. An armature is electromagnetically coupled to the coil such that current to the coil biases the armature to a first position. A spring is coupled to the armature to bias the armature to a second position. The relay includes a switch which includes a movable contact coupled to the armature such that the switch is in a first state when the armature is in the first position and the switch is in a second state when the armature is in the second position. A magnet is movable in the housing between a blocking position, in which the magnet acts as a mechanical block to prevent the armature from moving to the second position, and an unblocking position, in which the magnet allows the armature to move to the second position. The magnet is electromagnetically coupled to the coil such that current through the coil in a first direction moves the magnet to the blocking position and current through the coil in a second direction moves the magnet to the unblocking position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.