Indicating mechanism for push button switches

Claim 1

In an indicating mechanism for a pushbutton switch having a slide movable between a first outer position and a second inner position, said slide being movable inwardly past said second position for locking or unlocking said slide from said second position; said indicating mechanism comprising a hollow nob adapted to be connected for movement with said slide and having a transparent window in its end portion; an indicating member having an indicating surface disposed slidably within said nob; and at least two shutter members disposed within said nob and having portions able to extend between said indicating surface and said window for preventing said indicating surface from being viewed through said window; the improvement comprising: said shutter members being formed from a resilient material and having said portions thereof biased towards one another; and means for moving said shutter members with said nob; whereby as the switch slide is pushed from its first position, said indicating surface will be moved between said portions of the shutter members to spread them apart resiliently to permit visual detection of said indicating surface and as the switch slide returns back from being pushed passed its second position, said portions of the shutter members will resiliently hold said indicating member near said window.