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US 4,404,443 AGranted
Electromagnetic relay
AssigneeThomson-CSF
InventorsDaniel Coynel, Maurice Roussigne
Life of this patent
Estimating the term…
Abstract
An improved relay for increasing the service life of contacts and the breaking capacity. Each fixed contact is mounted on a solid parallelepipedal block having a hollowed-out portion for receiving the end of the corresponding connection rod and providing a high-quality connection by brazing. The relay is further provided with means for extinguishing the electric arc by lengthening the arc, a permanent magnet being accordingly employed for each pair of associated contacts, one contact being fixed and the other being movable. The magnet is preferably housed within a spark trap.
Claims8
An electromagnetic relay comprising:
- a base traversed by connection rods;
- at least one fixed contact supported by a metallic member welded to one end of a connection rod, said fixed-contact support member being designed in the form of a solid block provided with a hollowed-out portion for receiving the end of the corresponding connection rod;
- at least one strip subjected to an actuating element, the fixed contact being operatively associated with a corresponding contact located at one end of the movable strip;
- means for extinguishing the electric arc by lengthening said arc, said means being provided in the case of each pair of associated contacts in which one contact is fixed and the other contact is movable with at least one permanent magnet for producing a magnetic field in a direction at right angles to the direction of the current which flows between said associated contacts.
1 more element
Dependencies are inferred from the claim text.