IL43697A - Sealed contact which can be magnetically actuated - Google Patents

Claims (3)

1. A sealed electrical contact unit which can be magnetically actuated, and which includes a flat housing consisting of a plane base plate and a cover with a flanged portion attached to the base plate, and a flat armature of a ferro-magnetic material within the housing, in which the armature is mounted "bo the cover by an armature holding spring, in which the said base plate consists of a ring-shaped outer portion and a disc-shaped inner portion both of which are made of metal, in which said outer and inner portions are joined together by a ring of an electrically and magnetically non-conductive material, in which the inner surfaces of said ring-shaped outer portion and said discshaped inner portion are substantially co-planar, and in which the armature faces part of the inner portion as well as part of the outer portion.

2. A sealed contact unit according to claim 1, and in which said inner portion is arranged eccentrically within said outer portion. 3. A sealed contact unit according to claim 1, or 2, and in which the cover is joined to said base plate by an annular sealing weld. 4. A sealed contact unit according to claim 1, and in which the parts of the housing are hermetically joined to one another. 5. A sealed contact unit according to claim 1, 2, 3 or 4 , and in which the surface of the armature cooperating with said inner portion has a bulged or spherical design. J¾ sealed contact xm.it according to any one of Clains to S, and in which the fastening point of the armature holding spring to said cover is over said outer portion* i¾ sealed contact unit according to any one of claims 1 to 5, and in which the f stening point of the armature holding spring to said cover is over the inner portion* .& sealed contact unit according to any one of claims to and in which said inner portion is raade from a magnetically conductive material. A sealed contact unit according to any one of ' claims to So and in which said outer portion and said cover are made from a onmagn ic material. h sealed contact unit according to any one of claisss to and in which said outer portion is made from a non-magnetic material , and in which said cover is ∑r.ad 15» Ά relay according to claim 13 or 14, and in which the stacked contact units or the contact units arranged side by side are actuated by one common electromagnet, 15. An electromagnet relay comprising sealed contact units according to any one of claiEis 1 to 12 , in which two contact units and an electromagnet are agnetically in series, and in which said contact units have their base plates opposedly facing one another with a permanent magnet between them. 17., A relay according to claira IS, and in which a magnetically conductive pin carrying the jnagnetising winding is applied to the inner portions of the contact units. 18 A relay according to claim IS, and in which the surfaces of the inner portions which face each other have welded to them magnetically conductive stamped metal parts which are arranged adjacent to each other and vertically to the plane of said base plates, and are surrounded by a common magnetising winding* 19., A relay according to claim 18, and in which each said stamped metal port also forms a soldering lug or terminal for bringing out one of the electrical connections radially in relation to the contact units. 43597/2 20. Ά relay according to claim 17 or 16, and in which said permanent magnet has its poles applied to the facing surfaces of said outer portions* 21» ¾. relay according to claira 20, in which the distance ewee the tuo said base plates is so chosen that in the gap e wee them there is a shunt characteristic for said permanent magnet ? and a series characteristic for said electromagnet* 220 A relay according to claia 21, and in which the magnetising force of said permanent raagnot is so dimensioned as to obtain a neutral relay,, 23. A relay according to clain 21, and in which the magnetising force of said permanent magnet is so dlEensioaed as to obtain a bistable relay» 2 A relay according to claim 21, and in which the magnetizing fores of said permanent smgnet is so dimensioned as to obtain a rela e the contacts of which are normally closed. 25. , electromagnetic latching relay comprising sealed contact units accordiag to any one of claims 1 to 12, in which two contact units ¾rith the covers opposedly facing one another, and between which there is arranged a permanent magnet, are connected Magnetically in series. 26. relay according to claia 25, in which a magnetically conductive pin is applied almost coaxially wi said inner portions of the opposed covers of the unit. 27. a relay according to claia 26, in which said permanent raagnet has each one of its poles next to said magnetically conductive pin, and is applied to said opposed covers. 43697/2 28. A relay according to claim 27, and in which said inner portions of the contact units are connected magneticall to one another fay a flux guide surrounding the contact units in a U-shaped manner. 29. A relay according to any one of claims 25 to 28, and in which said magnetically conductive pin carries a magnetizing coil or winding. 30» . A relay according to any one of claims 25 to 28, in which the centre portion of said U-shaped flux guide consists of two parallel legs on each of which there is one coil which coils are controlled separately. 31. A relay according to any one of claims 13 to 30 , in which said inner portions and/or said covers of the Individual contact units have soldering lugs or terminals for leading out the electrical connections radially to said contact units. 32. A relay according to any one or more of claims 16 to 31, and in which the current-conducting parts of said two oppositely arranged contact units are separated from one another by means of insulating foils or a suitable plastics coating. 33. A sealed contact unit substantially as described with reference to Figs. 1, 2 and 3, or Fig. 4, or Fig* 5, or Fig. 6, or Fig. 7, of the accompanying drawings.

3. . An electromagnetic relay substantially as described with reference to Fig. 8, Fig. 9, Fig3. 10 and 11, Figs. 12 and 13, Fig. 17, or Fig. 18 of the accompanying drawings. For the Applicants DR. RE AINHOLD COHK AND PARTNERS