Geometrical instruments – Straight-line light ray type – Multisight line
Patent
1981-07-20
1983-07-19
Little, Willis
Geometrical instruments
Straight-line light ray type
Multisight line
33246, F41G 138
Patent
active
043935958
ABSTRACT:
An adjustment gasket for resiliently locking a threadedly connected tube against accidental rotation while permitting rotational adjustment of such tube, is described. The adjustment gasket may be clamped between two threadedly interconnected tubes in a rifle scope to permit rotational adjustment of such tubes such as for rotational alignment of the lenses during manufacture of such scope, while preventing accidental rotation of such tubes. The adjustment gasket is a resilient ring member of synthetic plastic material which is compressible longitudinally of such tubes to resiliently lock such tubes against accidental rotation without damaging the tubes. The adjustment gasket is in the form of an undulated ring having a plurality of concave arcuate areas separated by flat areas to provide a set of surface areas on each side of the gasket. The two sets of surface areas are angularly offset so that the flat areas on one side of the gasket are in alignment with the arcuate areas on the other side of the gasket. As a result, the gasket is capable of longitudinal compression by an amount greater than one-half of the minimum width of such gasket. The range of longitudinal compression is sufficient to enable one complete rotation of the interconnected tubes for adjustment purposes, while maintaining the tubes in resilient tension to lock them against accidental rotation.
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Leupold & Stevens, Inc.
Little Willis
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