Sight correction attachment for respirators
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United States of America Patent
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-
Dec 1, 1987
Grant Date -
N/A
app pub date -
Dec 9, 1985
filing date -
Dec 14, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sight-corrective lens is attached between an eyepiece of a respirator and the eye of the wearer by a monocular mount into which the lens fits as if into a standard spectacle frame. Attachment devices for the mount are apertured lugs on a surround of the eyepiece and tabs on the mount. By making the tab and mount in one position of different tangential width from the tab and mount in the other, a desired unique positioning of the lens is assured. The mount may have a seal ring of which the deformable ridge is pretensioned against the eyepiece by the fitting of the tabs in the lugs to prevent ingress of moisture or particles between them.
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