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US 4,682,133 AGranted
Electro-magnetic relay having two armatures
AssigneeSiemens Aktiengesellschaft
InventorJosef Kern
Life of this patent
Estimating the term…
Abstract
A relay includes two armatures each having a contact spring and a contact piece secured thereto which interacts with the respective cooperating contact element. The two movable contact pieces are electrically connected by a stranded copper conductor so that a series connection of the two contacts is formed. The series connection can be interrupted twice by the two armatures which switch independently of one another so that a reliable opening of the circuit is assured even if one of the contacts fuses. The relay is particularly useful for safety circuits such as in motor vehicles.
Claims9
An electro-magnetic relay, comprising:
- a coil having a coil body defining a mounting plane and an axially extending core extending parallel to the mounting plane and a winding around said core;
- a yoke disposed adjacent said coil and parallel to said axis and having a bearing blade at each of first and second opposite ends;
- first and second flat armatures extending substantially perpendicular to said axis at respective opposite ends of said coil, each of said flat armatures being seated on one of said bearing blades at one of said opposing yoke ends and forming a working air gap with an end of said core, each of said first and second flat armatures having a continuation extending beyond said bearing blade;
- a common restoring spring stressed for tension connecting said continuations of said first and second armatures behind said bearing blades;
- a contact spring carried by each of said first and second armatures;
- movable contact elements on said contact springs;
- an electrical conductor element connecting said movable contact elements on said two contact springs;
- and
- cooperating contact elements for interaction with said movable contact elements,
- whereby said first and second armatures are independently openable to form a two contact series connection relay.
7 more elements
Dependencies are inferred from the claim text.