H - Electricity – 01 – H
Patent
H - Electricity
01
H
310/53, 310/56
H01H 51/27 (2006.01) H01H 51/22 (2006.01) H02K 33/18 (2006.01)
Patent
CA 1079783
Abstract of the Disclosure This invention relates to an electromagnetic switching relay, which is adaptable to both monostable and bistable operation. It is known to provide a relay having a coil form around which an excitation coil is wound. The coil form has a central aperture containing a flat, centrally pivoted ferromagnetic armature having its limbs movable between contact shoes at each end of the coil form. Ferromagnetic inlay elements are also provided at the ends of the coil form, and an external magnetic yoke is provided around the entire structure. Thus, by passing a current through the coil, the armature aligns itself in bridging contact with diametrically opposed contact shoes, thus adopting a desired switch position. The structure described suffers from the disadvantages that for bistable operation its construction is substantially different from that required for monostable operation, the armature is not fixed in its longi- tudinal direction and can therefore be jarred out of position by externally applied shocks, and there is no provision for adjustment or variation of the switching sensitivity. The present invention avoids these problems by locating the armature in its longitudinal direction by use of enclosed bearings having convex bearing surfaces The ferromagnetic inlay elements are interchangeable with soft metal elements to provide flexibility between monostable and bistable operation and the inlay elements are magnetically partially insulated from the contact shoes to provide stray lines of force whereby the sensitivity may be adjusted.
290738
Pecenko Igor
Vrsnak Franc
Zadravec Jurica
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