Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
232 words
An AC current electromagnetic relay comprising; a yoke formed into a generally E-shaped configuration with an elongated center leg and shortened side legs extending from a common base so that the free end portions of the respective legs define apexes of a triangle; a coil disposed around the center leg of the yoke; a shading ring disposed around the center leg; a generally U-shaped flat armature having a pair of parallel arms connected by a web and being mounted on one surface of the yoke in substantially parallel relationship therewith; a switching contact assembly including at least one pair of contacts which cooperates with the armature to make and break the contacts; bearing means by which said U-shaped armature is pivotally supported at the free end edges of the arms on the surface of the yoke with its arms partially overlapping on the side legs of the yoke and with its web confronting the free end portion of the center leg, whereby upon energization of the coil the armature is pulled toward the yoke to be in a set position where the arms and the web of the armature abut respectively with said free end portions of the center and side legs defining the apexes of the triangle so as to establish a three-point contact between the yoke and the armature; and biasing means for biasing the armature away from the yoke.
Claim 2
Dependent Claim
232 words
An AC current electromagnetic relay comprising; a yoke formed into a generally E-shaped configuration with an elongated center leg and shortened side legs extending from a common base so that the free end portions of the respective legs define apexes of a triangle; a coil disposed around the center leg of the yoke; a shading ring disposed around the center leg; a generally U-shaped flat armature having a pair of parallel arms connected by a web and being mounted on one surface of the yoke in substantially parallel relationship therewith; a switching contact assembly including at least one pair of contacts which cooperates with the armature to make and break the contacts; bearing means by which said U-shaped armature is pivotally supported at the free end edges of the arms on the surface of the yoke with its arms partially overlapping on the side legs of the yoke and with its web confronting the free end portion of the center leg, whereby upon energization of the coil the armature is pulled toward the yoke to be in a set position where the arms and the web of the armature abut respectively with said free end portions of the center and side legs defining the apexes of the triangle so as to establish a three-point contact between the yoke and the armature; and biasing means for biasing the armature away from the yoke.
Claim 3
Dependent Claim
95 words
The AC current electromagnetic relay as set forth in claim 1, wherein the yoke is made of two identical laminations of said generally E-shaped configuration with elongated center leg members, said center leg members being inserted into the shading ring to be clamped thereby so as to form the center leg of the yoke, and wherein said shading ring is positioned adjacent the contacting portion of the center leg with the web of the armature and extends into an opening formed in the web of the armature when the armature is in the set position.
Claim 4
Dependent Claim
48 words
The AC current electromagnetic relay as set forth in claim 1, wherein the free end portion of the center leg of the yoke is formed on the opposite sides adjacet the contacting face against the web of the armature with shoulders upon which the shading ring is supported.
Claim 5
Dependent Claim
68 words
The AC current electromagnetic relay as set forth in claim 1, wherein the free end portion of the center leg of the yoke is formed in the contacting face against the web of the armature with a notch into which one peripheral portion of the shading ring is received so that the shading ring does not project on the contacting face of the center leg of the yoke.
Claim 6
Dependent Claim
44 words
The AC current electromagnetic relay as set forth in claim 4, wherein the opposite peripheral portion of the shading ring to the portion received in the notch is bent along the face opposite to the contacting face of the center leg of the yoke.
Claim 7
Dependent Claim
41 words
The AC current electromagnetic relay as set forth in claim 1, wherein said shading ring is supported by means of a spacer mounted on the flange of a coil bobbin of said coil disposed around the center leg of the yoke.
Claim 8
Dependent Claim
41 words
The AC current electromagnetic relay as set forth in claim 1, wherein said shading ring is supportedly inserted in a carrier integrally formed on the flange of a coil bobbin of said coil disposed around the center leg of the yoke.