Electrical switch
AssigneeDelta Schoeller Ltd
InventorsEric Thomas Ryan, Roger Louis Hambidge
Life of this patent
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Abstract
An electrical switch having a plurality of plungers (6) and (8) telescoped one inside another. Each plunger is depressable from an extended position independently of the other(s) against a bias provided by a spring (28, 46) to operate respective switch contacts (62, 56).
Claims10
An electrical switch comprising a housing containing first and second sets of switch contacts, first and second plungers movable within said housing for operating said first and second contact sets, respectively, first and second biasing means connected between said housing and respective plungers for independently urging said plungers outwardly of said housing and to respective extended positions relative to said housing, said first plunger being telescoped within said second plunger, and each of said plungers being movable independently of the other of said plungers from said respective extended position for operating said corresponding contact set.
An electrical switch comprising a housing having a passageway therethrough extending from a first end of said housing towards a second end thereof, a first switch contact set disposed within said passageway adjacent to said housing second end and a second switch contact set disposed within said passageway intermediate said housing ends, first and second plungers disposed within said passageway for axial movement therein over respective preselected ranges of movement, said first plunger being slidably disposed within said second plunger, both said plungers having respective inner ends disposed within said passageway and respective outer ends extending outwardly from said passageway and away from said housing first end, spring bias means associated with each of said plungers for biasing each of said plungers independently of one another against movement inwardly of said housing, said second plunger operating said second contact set upon relative movements between said second plunger and said second contact set, said first plunger extending forwardly from said second plunger within said housing for reaching to and operating said first contact set upon movement of said first plunger inwardly of said housing, and said second plunger being of such short axial length as to be always spaced at least a preselected distance from said first contact set over the full range of movements of said second plunger.
Dependencies are inferred from the claim text.