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US3702981A Expired / Lapsed US ⏱️ 0.0 years remaining

Electromagnetic relay

Assignee: Individual
•
Filing: 1971-07-27
•
Granted: 1972-11-14
•
Expires: 1991-07-27
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Abstract

Abstract An electromagnetic relay has a winding form, of plastic composition material, carrying the entire relay assembly, has an armature movably supported in the winding form, and has at least one set of contact springs supported on the winding form and including plural contact springs and resilient cooperating contacts electrically isolated from each other by dielectric material. The contact springs and the cooperating contacts are formed with cutouts in the area of the dielectric material, and the relay further includes a magnet yoke. The coil form has flanges at both ends, and the flanges are formed with slots which are symmetrical and parallel to the longitudinal center line of the armature and perpendicular to the length of the winding form, these slots being defined, in part, by lamellae of plastic composition material. The contact springs, resilient contacts, relay winding terminals and legs of the magnet yoke are mounted in the slots and locked in position by deformation of the plastic composition material into the cutouts, such deformation being effected by melting and flowing of the plastic composition material. The melting and flowing of the plastic composition material may be effected ultrasonically.

Inventors

  • 👤 Klaus-Dieter Wahnschaffe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 22:54
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/02; H01H50/04; H01H50/041; H01H50/042; H01H50/54; H01H50/56

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 163 words
In an electromagnetic relay of the type having a winding form, of plastic composition material, carrying the entire relay assembly, an armature movably supported in the winding form, at least one set of contact springs supported on the winding form and including plural contact springs, movable by the armature, and resilient cooperating contacts electrically isolated from each other by dielectric material, the contact springs and cooperating contacts being formed with cutouts in the area of the dielectric material, and a magnet yoke, the improvement comprising, in combination, said coil form having flanges at both ends; said flanges being formed with slots which are symmetrical and parallel to the longitudinal center line of said armature and perpendicular to the left of said winding form, and which are defined, in part, by lamellae of plastic composition material; at least said contact springs and said resilient contacts being mounted in said slots and locked in position by deformation of the plastic composition material into cutouts therein.
Claim 2
Dependent Claim 163 words
In an electromagnetic relay of the type having a winding form, of plastic composition material, carrying the entire relay assembly, an armature movably supported in the winding form, at least one set of contact springs supported on the winding form and including plural contact springs, movable by the armature, and resilient cooperating contacts electrically isolated from each other by dielectric material, the contact springs and cooperating contacts being formed with cutouts in the area of the dielectric material, and a magnet yoke, the improvement comprising, in combination, said coil form having flanges at both ends; said flanges being formed with slots which are symmetrical and parallel to the longitudinal center line of said armature and perpendicular to the left of said winding form, and which are defined, in part, by lamellae of plastic composition material; at least said contact springs and said resilient contacts being mounted in said slots and locked in position by deformation of the plastic composition material into cutouts therein.
Claim 3
Dependent Claim 39 words
In an electromagnetic relay, the improvement claimed in claim 1, including soldering lugs, designed as fixed contacts, and magnet yoke legs mounted in said slots and locked in position by deformation of the plastic composition material into cutouts therein.
Claim 4
Dependent Claim 26 words
In an electromagnetic relay, the improvement claimed in claim 2, in which said slots are formed in extensions of said flanges extending laterally from said flanges.
Claim 5
Dependent Claim 73 words
In an electromagnetic relay, the improvement claimed in claim 2, in which the depth of said slots are greater than the widths of the components inserted and seated against the bottoms of said slots; the components inserted in said slots being further locked against extraction from the associated slots by deformation of the plastic material forming those portions of the slots outwardly of the inserted compoNents into locking engagement with the inserted components.
Claim 6
Dependent Claim 23 words
In an electromagnetic relay, the improvement claimed in claim 2, in which said winding form is a one-piece body of plastic composition material.
Claim 7
Dependent Claim 18 words
In an electromagnetic relay, the improvement claimed in claim 5, in which said winding form is a casting.
Claim 8
Dependent Claim 20 words
In an electromagnetic relay, the improvement claimed in claim 5, in which said winding form is an injection molded body.
Claim 9
Dependent Claim 54 words
In an electromagnetic relay, the improvement claimed in claim 2, in which said armature is an elongated armature extending through a central aperture in said winding form and projecting from said winding form at each end; and respective contact sliders secured to the opposite ends of said armature and engaged with said contact springs.

References Cited (Backward Citations)

US2831939A Cited
US3172272A Cited
US3242285A Cited
US3377450A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-11-14 1976-05-15 1976-11-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-11-14 1980-05-15 1980-11-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-11-14 1984-05-15 1984-11-14 $7700.00 Window Closed / Lapsed

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