US3813625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnet with detachable casting and non-rotatable armature
Assignee: Emerson Electric Co
•
Filing: 1973-02-21
•
Granted: 1974-05-28
•
Expires: 1993-02-21
Abstract
Abstract A thermocouple-energized electromagnet having a casing comprising a metal base and a molded plastic cover detachably connected thereto and conveniently removable to permit cleaning of the armature and pole faces. A yoke and winding are fixed to the base and a non-circular armature is slidably mounted in the cover. A non-circular interior cover wall surface prevents rotation of the armature, and a recess in the cover wall receives an element fixed to the base to insure that the cover is always replaced in the same angular relation to the yoke.
Inventors
- 👤 H Kinsella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:14
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1638; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
In an electromagnet, a base member, a magnetic core member fixed to said base and having an outwardly facing pole face, a winding on said member, a cover member having an open end and a closed end and having its open end detachably connected to said base and completing a casing therewith, an operating rod extending through the closed end of said cover and slidably mounted therein, an armature in said casing mounted on the interior end of said rod for axial movement into and out of engagement with said pole face, said cover member having at least one flat axially extending interior wall surface, and said armature having at least one flat side contiguous with said flat wall surface whereby rotation of said armature is prevented.
Claim 2
Dependent Claim
127 words
In an electromagnet, a base member, a magnetic core member fixed to said base and having an outwardly facing pole face, a winding on said member, a cover member having an open end and a closed end and having its open end detachably connected to said base and completing a casing therewith, an operating rod extending through the closed end of said cover and slidably mounted therein, an armature in said casing mounted on the interior end of said rod for axial movement into and out of engagement with said pole face, said cover member having at least one flat axially extending interior wall surface, and said armature having at least one flat side contiguous with said flat wall surface whereby rotation of said armature is prevented.
Claim 3
Dependent Claim
16 words
The electromagnet claimed in claim 1 in which said cover member is constructed of dielectric material.
Claim 4
Dependent Claim
54 words
The electromagnet claimed in claim 1 in which said cover member is moved axially into detachable connection with said base member and in which a Projection on one of said members enters an axially extending recess in the other of said members, thereby requiring said members to be assembled in a predetermined angular relationship.
Claim 5
Dependent Claim
36 words
The electromagnet claimed in claim 1 which includes stop means on the exterior extending portion of said operating rod limiting axial movement of said armature within the extent of said flat axially extending interior wall surface.
Claim 6
Dependent Claim
123 words
In an electromagnet, a circular metal base member, a U-shaped yoke fixed to said base member having outwardly extending legs and outwardly facing pole faces, a winding on said yoke, a cup-shaped cover member having an open end detachably connected to said base member and completing a closure therewith, an operating rod slidably mounted in the closed end of said cup-shaped cover member and extending interiorly and exteriorly thereof, an armature disc in said closure mounted on the interior end of said operating rod for axial movement into and out of engagement with said pole faces, said cover member having flat axially extending interior wall surfaces, and said armature having flat sides contiguous with said interior wall surfaces whereby its rotation is prevented.
Claim 7
Dependent Claim
123 words
In an electromagnet, a circular metal base member, a U-shaped yoke fixed to said base member having outwardly extending legs and outwardly facing pole faces, a winding on said yoke, a cup-shaped cover member having an open end detachably connected to said base member and completing a closure therewith, an operating rod slidably mounted in the closed end of said cup-shaped cover member and extending interiorly and exteriorly thereof, an armature disc in said closure mounted on the interior end of said operating rod for axial movement into and out of engagement with said pole faces, said cover member having flat axially extending interior wall surfaces, and said armature having flat sides contiguous with said interior wall surfaces whereby its rotation is prevented.
Claim 8
Dependent Claim
50 words
The electromagnet claimed in claim 5 having radial projections at the open end of said cup member entered into recess means in said base member for detachable connection thereto, and said cup member having portions of sufficient resiliency to permit insertion and removal of said projections from said recess means.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |