Pressure responsive switch construction and method of making the same

Claim 1

A switch construction comprising: a switch housing base of plastic material with a relatively thick circumferential base rim having an outward base flange with a rectangular cross-sectional configuration having sharp right angled corners and being defined by a flat outward base flange surface, with a right angled flat base side flange surface, and with a flat inward base flange surface; a closure of plastic material for said base with a relatively thin circumferential closure rim having a flat outward closure flange, with a right angled flat closure side flange, and with an inward closure hooker flange on the inside of said closure side flange at a right angle relative thereto and being disposed inboard of the free end of said closure side flange; a resilient switch operating diaphragm with a resilient outward substantially flat circumferential diaphragm rim substantially of the same outside dimension as said base rim and having a diaphragm central portion; a switch means mounted on said base and having a switch actuating means to be engaged by said diaphragm central portion; said diaphragm having been placed with said diaphragm rim adjacent said base rim and with said diaphragm central portion adjacent said switch actuating means; said outward closure flange having been placed adjacent said diaphragm rim and said base rim with said inward closure hooker flange adjacent said diaphragm rim and said base rim and with said free end of said closure side flange overlapping part of said base rim to locate said closure relative to said base; and said base rim and said outward closure flange having been pressed toward each other to push said hooker flange past said diaphragm rim, past said outward base flange surface, past said base side flange surface, and to inwardly move said hooker flange against said inward base flange surface, to assemble and produce said switch construction.