Electromagnetic relay
US4978935A · kind A · utility
Inventors
Key dates
| Filing date | Jan 25, 1988 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Jan 25, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H51/2209
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-speed, high-reliability electromagnetic relay particularly adapted for use in electronic systems with signal frequencies from DC in excess of 20 MHz. A ferro-magnetic armature is attached to an actuator plate made of dielectric material which is in contact with a flexible contact reed. One end of the contact reed is in fixed electrical contact with an input pin and the other end is movable between a normal position in electrical contact with a first output pin and a second position in electric contact with a second output pin. To improve resistance to environmental extremes such as shock and vibration, a permanent magnet can be located so that its attractive force holds the armature in the normal position. An electromagnet is located such that when it is activated the attractive force of the permanent magnet is overcome by the attractive force of the electromagnet, moving the armature to the second position and causing the actuator plate to move the contact reed into electrical contact with the second output pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.