Patent US4250031A successfully refreshed from Google Patents.
Patent US3801940A successfully refreshed from Google Patents.
US3801940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relay
Assignee: Siemens AG
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Filing: 1972-03-08
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Granted: 1974-04-02
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Expires: 1992-03-08
Abstract
Abstract An electromagnetic relay, particularly useful for telecommunications switching purposes is described. The relay has a series magnetic circuit comprised of a magnetic core encircled by an excitation winding, a short circuit yoke arranged in parallel to the winding axis of the core and two magnetizable flat armatures pivotally mounted at the front end of the short circuit yoke. The armatures are biased into a rest position by contact spring sets and thereby form two working air gaps with the poles of the magnetic core. In their operating positions the armatures magnetically bridge the short circuit yoke and the magnetic core.
Inventors
- 👤 E Grassl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:56
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
235 words
In an electromagnetic relay including a magnetic core enclosed by at least one exciting coil, short circuit yoke means arranged in parallel to the axis of said core, at least a pair of magnetically operating flat armatures in series with said magnetic core and said short circuit yoke means and contact spring means controlled mechanically by the armatures and wherein the armatures form with the magnetic core two working air gaps when the relay is not energized and actuate the contact spring means when the relay is energized, the improvement comprising: a winding cylinder constructed to receive said magnetic core axially in the interior of said cylinder, coil frame means constructed from insulating material and having first and second flange members fixEdly connected, one to the other, over said winding cylinder means, means defining an opening in each of said flange members for receiving said short circuit yoke means, means defining a recess in each of said flange members for movably seating either of said armatures on forward portions of said short circuit yoke means, contact spring means projecting above the movable ends of said armatures with at least one portion of said contact spring means being constructed as a return spring for restoring said armatures to their rest positions and at least a pair of channel members extending laterally and parallel to the longitudinal axis of said armatures for seating said contact spring means.
Claim 2
Dependent Claim
235 words
In an electromagnetic relay including a magnetic core enclosed by at least one exciting coil, short circuit yoke means arranged in parallel to the axis of said core, at least a pair of magnetically operating flat armatures in series with said magnetic core and said short circuit yoke means and contact spring means controlled mechanically by the armatures and wherein the armatures form with the magnetic core two working air gaps when the relay is not energized and actuate the contact spring means when the relay is energized, the improvement comprising: a winding cylinder constructed to receive said magnetic core axially in the interior of said cylinder, coil frame means constructed from insulating material and having first and second flange members fixEdly connected, one to the other, over said winding cylinder means, means defining an opening in each of said flange members for receiving said short circuit yoke means, means defining a recess in each of said flange members for movably seating either of said armatures on forward portions of said short circuit yoke means, contact spring means projecting above the movable ends of said armatures with at least one portion of said contact spring means being constructed as a return spring for restoring said armatures to their rest positions and at least a pair of channel members extending laterally and parallel to the longitudinal axis of said armatures for seating said contact spring means.
Claim 3
Dependent Claim
51 words
The electromagnetic relay defined in claim 1 further comprising: actuation card means, constructed from insulating material, for indirectly actuating said contact spring means for said armatures and means on said coil frame for slidably supporting said actuation card so that the latter can move in the direction of the armature stroke.
Claim 4
Dependent Claim
46 words
The electromagnetic relay defined in claim 2 wherein said actuation card support means includes guide grooves for receiving said actuation cards and wherein said actuation card means are of a generally U-shaped configuration, a portion of which serves as the area of contact with said armatures.
Claim 5
Dependent Claim
77 words
The electromagnetic relay defined in claim 3 wherein the moving ends of said armatures are, respectively, formed in a generally two-pronged fork arrangement and wherein each said flange in the vicinity of said guide groove is provided with two recesses extending at right angles to the plane of said actuation card, said prongs on said armatures passing through said recesses so as to abut the portion of said actuation card means serving as said area of contact.
Claim 6
Dependent Claim
23 words
The electromagnetic relay defined in claim 4 wherein said recesses are constructed as to form sliding guides for said prongs of said armatures.
Claim 7
Dependent Claim
35 words
The electromagnetic relay defined in claim 4 further comprising: bottom plate means, constructed from insulating material, fastened to said coil frame for support of said relay and for locking said contact spring means into position.
Claim 8
Dependent Claim
29 words
The electromagnetic relay defined in claim 1 wherein said magnetic core is formed as a cylindrical section and said short circuit yoke is formed as a flat, rectangular section.
Claim 9
Dependent Claim
113 words
The electromagnetic relay defined in claim 1 wherein said armatures are provided at their stationary ends with a frontal side extending at right angles to the longitudinal sides of said armatures and further comprising: at least two projections on said armatures and tension spring means supported under initial tension by said projections, the ends of said tension spring means being supported by suitably shaped portions of said coil frame means so as to press said coil frame means neutrally against said short circuit yoke means, the edges of said frontal sides of said armatures facing said projections forming the pivot axes of said armatures within the pole surface of said short circuit yoke.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |