Gun sighting arbor

Details Gun sighting arbor Gun sighting arbor

1991-05-21

1992-09-29

Schwartz, Larry I.

Geometrical instruments

Straight-line light ray type

Aerial bomb sight

279 222, F41G 154

Patent

active

051505274

ABSTRACT:
An expandable arbor for sighting a scope on a gun having a body with a conical portion and an axial throughbore. A shaft is journaled in the throughbore, and the shaft carries a knob on one end and a resilient plug on the other end, with a travelling spreader disk on a threaded portion of the shaft adjacent the plug. The plug is inserted into the muzzle of a gun barrel, and the knob is tightened to draw the spreader disk into the plug, thereby causing the plug to expand to hold the arbor in the gun barrel and concentrically align the arbor within the bore. The arbor has a flat on a rear portion for receiving a set screw to mount a bore sighter on the arbor for aligning the scope on the gun.

REFERENCES:
patent: 2542967 (1951-02-01), Waechter
patent: 3228678 (1966-01-01), Koger
patent: 4057905 (1977-11-01), Piaja
patent: 4090305 (1978-05-01), Cassidy
patent: 4534116 (1985-08-01), Davis
patent: 4750269 (1988-06-01), Townsend et al.
Brownells Catalog No. 43, 1990-1991.

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