Relay for microwave oven
OwnerSpencer C. Schantzinventor
Life of this patent
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Abstract
Disclosed herein is a combination relay, suppression resistor and end of cycle bell in a compact unitary assembly intended for use in a microwave oven. The size of the relay is reduced by employing a bifurcated contact strip which has legs surrounding the relay coil pole piece and a contact actuator which is U-shaped to move within a plane which intersects the coil and bobbin. A plastic housing encloses these components and provides a support for the bell. The surge suppression resistor can be a few turns of magnet wire wrapped around the protective covering on the relay coil core.
Claims14
In an electromagnetic device having a ferromagnetic frame, a core mounted on the frame, a coil of wire wound on a bobbin which is around said core and having a ferromagnetic armature pivoted to said frame adjacent to said core for movement toward and away from the end of said core, the improvement comprising a contact strip having a bifurcated portion surrounding the core of said bobbin, with the bifurcated portion anchored to a terminal strip on one side of said coil and a contact structure at the other end of the contact strip to maximize the length of the contact strip and reduce the overall length of said device.
In an electromagnetic device having a ferromagnetic frame, a pole piece, a bobbin mounted on the frame and around said pole piece, a coil of wire wound on the bobbin and having a ferromagnetic armature pivoted to said frame adjacent to said bobbin for movement toward and away from the end of said pole piece, including a housing and a switch actuator in the form of a loop shaped yoke which receives a portion of the coil, guide means on a terminal block for supporting and guiding vertical movement of the switch actuator in a plane through the coil in response to engagement by said armature and spring pressure of said contact strip.
In an electromagnetic device having a ferromagnetic frame, a core mounted on the frame, a coil of wire wound on the core and having a ferromagnetic armature pivoted to said frame adjacent to said core for movement toward and away from the end of said core, a housing for said device, said housing including a top wall, a housing bridge portion spaced from said top wall to define a slot, and connecting means connecting a bell to said bridge portion above said slot to support said bell in cantilevered relationship on one side of said housing and said armature having a striker connected to said armature to pivot with said armature and said armature extending beneath said bridge portion and through said slot for movement in a striking path to strike the exterior of said bell.
Dependencies are inferred from the claim text.