US3821674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relay armature mounting
Assignee: Siemens AG
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Filing: 1973-04-12
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Granted: 1974-06-28
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Expires: 1993-04-12
Abstract
Abstract An L-shaped armature is mounted on a supporting yoke associated with an electromagnetic relay coil in a manner enabling easy straight line assembly and removal of the armature and assuring positive mounted retention of the armature for efficient functioning for its intended purpose. Retention of the armature is effected by a leaf spring having a generally Z-shaped portion extending through an aperture in the armature and engaging with an anchor edge aligned with the rocking fulcrum of the armature. Straight line assembly is facilitated by a cam terminal on the free end portion of the spring and a cam surface tooth formation on the armature. Interlocking shoulders on the spring and the armature assure positive retention of the armature on the yoke.
Inventors
- 👤 E Wanka
- 👤 M Aidn
- 👤 G Furtwangler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:29
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/66; H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/24; H01H50/26; H01H50/02; H01H50/04; H01H50/041; H01H2050/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
308 words
An electromagnet relay assembly, including a yoke member provided with a fulcrum surface, an armature having a bearing surface rockably engaging said fulcrum surface, a thrust surface on said armature facing oppositely to said bearing surface, a retaining leaf spring secured to said yoke member and having a spring detent portion in snap-on retaining engagement with said thrust surface and tensionably thrusting against said thrust surface and thereby pressing said bearing surface against said fulcrum surface, said armature having a rigid tongue providing said thrust surface and offset relative to a face of said armature, said yoke member having a complementary recess into which the tongue projects, said spring detent portion overlying said recess and retaining said tongue in the recess, said armature being of generally L-shaped provided with a body leg overlying the yoke member and a pole leg angularly related to said body leg, said bearing surface being provided at the bight at juncture of said legs, said tongue being offset into said bight with said thrust surface and said bearing surface in alignment, said legs having a clearance slot opening extending across said bight, and said detent portion of the spring extending into said opening, said detent portion including a thrust surface engaging finger and a cam terminal flange at the tip of said finger, said tongue having a cam surface leading to said thrust surface and engageable with said cam terminal flange to lift the detent portion tensionably over said thrust surface during a longitudinal relative assembly movement of the armature and yoke member, the improvement comprising: said terminal cam flange being of a length to project outwardly from said opening and having inwardly facing interlock shoulder means thereon in locking confrontation with outwardly facing locking shoulder means on said armature and preventing unintentional relative longitudinal separation of the armature and the yoke member.
Claim 2
Dependent Claim
308 words
An electromagnet relay assembly, including a yoke member provided with a fulcrum surface, an armature having a bearing surface rockably engaging said fulcrum surface, a thrust surface on said armature facing oppositely to said bearing surface, a retaining leaf spring secured to said yoke member and having a spring detent portion in snap-on retaining engagement with said thrust surface and tensionably thrusting against said thrust surface and thereby pressing said bearing surface against said fulcrum surface, said armature having a rigid tongue providing said thrust surface and offset relative to a face of said armature, said yoke member having a complementary recess into which the tongue projects, said spring detent portion overlying said recess and retaining said tongue in the recess, said armature being of generally L-shaped provided with a body leg overlying the yoke member and a pole leg angularly related to said body leg, said bearing surface being provided at the bight at juncture of said legs, said tongue being offset into said bight with said thrust surface and said bearing surface in alignment, said legs having a clearance slot opening extending across said bight, and said detent portion of the spring extending into said opening, said detent portion including a thrust surface engaging finger and a cam terminal flange at the tip of said finger, said tongue having a cam surface leading to said thrust surface and engageable with said cam terminal flange to lift the detent portion tensionably over said thrust surface during a longitudinal relative assembly movement of the armature and yoke member, the improvement comprising: said terminal cam flange being of a length to project outwardly from said opening and having inwardly facing interlock shoulder means thereon in locking confrontation with outwardly facing locking shoulder means on said armature and preventing unintentional relative longitudinal separation of the armature and the yoke member.
Claim 3
Dependent Claim
54 words
An assembly according to claim 1, including leadin surfaces extending outwardly at the sides of and in general alignment with said cam surface of the tongue for guiding said cam flange interlock shoulder means to said outwardly facing locking shoulder means during the longitudinal relative assembly movement of the armature and the yoke member.
Claim 4
Dependent Claim
32 words
An assembly according to claim 1, said locking shoulder means on said flange comprising lateral projections thereon, and said shoulder means on the armature comprising outwardly facing surfaces thereon alongside said opening.
Claim 5
Dependent Claim
39 words
An assembly according to claim 1, said armature including leading cam surface for guiding said shoulder means of the cam flange to the shoulder means of the armature during relative assembly movement of the armature and the yoke member.
Claim 6
Dependent Claim
40 words
An assembly according to claim 4, said tongue cam surface and said leading cam surface extending in a common plane upwardly and outwardly relative to said armature where the body leg of the armature extends generally horizontally and faces upwardly.
Claim 7
Dependent Claim
143 words
An electromagnet relay assembly, including a yoke member provided with a fulcrum surface, an armature having a bearing surface rockably engaging said fulcrum surface, a thrust surface on said armature facing oppositely to said bearing surface, a retaining leaf spring secured to said yoke member and having a spring detent portion in snap-on retaining engagement with said thrust surface and tensionably thrusting against said thrust surface and thereby pressing said bearing surface against said fulcrum surface, said armature having a clearance aperture therein through which said spring detent portion extends, the improvement comprising: said spring detent portion having interlock shoulder means; and said armature having interlock shoulder surface facing toward said interlock shoulder means and preventing unintentional relative separation of said armature and said yoke member; said interlock shoulder means being releasable from said shoulder surface by manual springing of said leaf spring.
Claim 8
Dependent Claim
143 words
An electromagnet relay assembly, including a yoke member provided with a fulcrum surface, an armature having a bearing surface rockably engaging said fulcrum surface, a thrust surface on said armature facing oppositely to said bearing surface, a retaining leaf spring secured to said yoke member and having a spring detent portion in snap-on retaining engagement with said thrust surface and tensionably thrusting against said thrust surface and thereby pressing said bearing surface against said fulcrum surface, said armature having a clearance aperture therein through which said spring detent portion extends, the improvement comprising: said spring detent portion having interlock shoulder means; and said armature having interlock shoulder surface facing toward said interlock shoulder means and preventing unintentional relative separation of said armature and said yoke member; said interlock shoulder means being releasable from said shoulder surface by manual springing of said leaf spring.
Claim 9
Dependent Claim
63 words
An assembly according to claim 6, wherein said spring detent portion includes a retaining finger in engagement with said thrust surface, and a cam terminal flange portion turned relative to said finger for camming over said thrust surface during relativE assembly movement of said armature and said thrust member, and said interlock shoulder means comprise lateral projections on said cam terminal flange portion.
Claim 10
Dependent Claim
146 words
An assembly according to claim 6, said armature having a rigid tongue providing said thrust surface and struck inwardly from said opening and with said thrust surface offset relative to a front face of said armature, said tongue providing a cam surface extending upwardly and outwardly considered with respect to the armature and leaf spring lying generally horizontally and facing upwardly, said interlock surface of the armature extending upwardly above said thrust surface of the tongue, and cam surface means provided on the armature in generally the same plane as said tongue cam surface and leading to said locking surface of the armature for leading said interlock shoulder means to said locking shoulder surface during relative assembly movement of the armature and the yoke member, and said interlock shoulder means snapping automatically into interlocking relation to said locking surface at completion of the relative assembly movement.
Claim 11
Dependent Claim
37 words
An assembly according to claim 3, said clearance slot being wider than said tongue to clear said shoulder projections for movement into interlocking relation with said shoulder means on the armature during said longitudinal relative assembly movement.
Claim 12
Dependent Claim
67 words
An assembly according to claim 3, said locking shoulder means lateral projections extending outwardly sufficiently relative to said shoulder means on the armature in the fully assembled relationship of the armature with the yoke to permit free rocking of the armature about said fulcrum surface, but said projections and said outwardly facing surfaces being close enough together to prevent unintentional separation of the armature and yoke member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |