Abstract: A housing contains a circuit board having a Hall effect sensor attached thereupon and a magnetic circuit positioned to provide magnetic flux through the Hall effect sensor. The magnetic flux through the Hall effect sensor is interruptable by a high permeability vane moving through an air gap in the magnetic circuit, activating the Hall effect sensor to provide timing signals for an automotive ignition distributor system. The housing contains a flux concentrator and a magnetic and pole piece assembly on opposite sides of the circuit board. Adhesive means fix the magnetic circuit elements and the circuit board in position.A method for assembling the magnetic circuit elements and the circuit board within the housing described above includes resiliently holding the circuit board in the reference position in the housing.

Abstract: A control device assembled on a circuit board is suitably encapsulated within a protective housing on a multiple unit basis especially suited for automation. A plurality of housings are arranged in an upright, side-by-side relation so that the associated circuit board may be inserted from a vertical direction and correctly positioned within the housing by a pair of guide rails and the action of gravity. The housings may then be suitably encapsulated utilizing a continuous and uninterrupted flow of encapsulating material.The housing itself is fabricated of a non-metallic, thermosetting material unaffected during subsequent operation in elevated ambient temperatures. The housing further includes a laterally extending lip or ledge which overlies a top portion of the next adjacent housing during assembly and encapsulation. Mounting holes are provided of a configuration to permit a wide variety of mounting locations.