Abstract: A pre-assembled pivoting lens unit is disclosed that includes a pivot cartridge capable of being at least partially received by an optical sighting device housing, along with a pivot tube defining a first end movably coupled to the pivot cartridge and a second end capable of moving transversely to the longitudinal axis of the device housing. Disposed in the pivot tube between the first and second ends is a lens assembly capable of focusing an image when the lens unit is at least partially received by the device housing. A fastener is used to secure the pivot cartridge to the first end of the pivot tube, and a resilient member interposes the fastener and pivot tube first end to enable relative pivoting movement of the pivot tube.

Abstract: A pre-assembled pivoting lens unit is disclosed that includes a pivot cartridge capable of being at least partially received by an optical sighting device housing, along with a pivot tube defining a first end movably coupled to the pivot cartridge and a second end capable of moving transversely to the longitudinal axis of the device housing. Disposed in the pivot tube between the first and second ends is a lens assembly capable of focusing an image when the lens unit is at least partially received by the device housing. A fastener is used to secure the pivot cartridge to the first end of the pivot tube, and a resilient member interposes the fastener and pivot tube first end to enable relative pivoting movement of the pivot tube.

Abstract: A retractable snowplow wing and mounting therefor which can be installed on substantially any truck with a longitudinal frame. The wing which may basically be of any desired construction is supported at both its inboard and outboard ends to permit raising it and swinging it horizontally from plowing position to a position substantially parallel to the truck body. The mechanism comprises first means attached to the inboard end of the wing and slidably mounted for vertical movement on support means carried by the truck frame and second means attached to the outboard end of the wing and comprising an extensible strut and motor means both of which are pivotally mounted on a bracket secured to the truck frame and extending laterally therefrom.