Telescopic sight with biasing spring

Claim 1

A rifle telescope comprising; a tubular housing having first and second ends; an objective lens mounted in said tubular housing adjacent said first end; an ocular lens mounted in said tubular housing adjacent said second end; a reticle means fixedly mounted in said tubular housing adjacent said ocular lens but spaced further from said second end than said ocular lens; a collector lens tube with first and second ends pivotally mounted from said first end in said tubular housing by a universal joint between said reticle means and said objective lens such that said first end of said collector lens tube may pivot relative to said tubular housing without moving transversely thereof; adjustment means mounted in said tubular housing and engageable with said second end of said collector lens tube to move it transversely of said tubular housing; resilient longitudinal locking means formed with a detent and mounted to said tubular housing between said collector lens tube and said tubular housing to bias it toward said adjustment means; means forming an opening in said collector lens tube into which said detent is received to prevent said collector lens tube from moving longitudinally of said tubular housing; a pair of stops formed in said collector lens tube; a pair of collector lenses mounted in said collector lens tube between said stops; and spring means mounted between said pair of collector lenses and biasing them apart and toward said stops.