Hinged strut construction

Claim 1

A hinged strut construction comprising, in combination: a) a pair of elongate, rigid strut members, b) hinge means hingedly connecting adjoining ends of the strut members to each other to enable the members to be either aligned or else angularly disposed with respect to each other, c) slide means for releasably locking the strut members in an aligned position, comprising an extendable and retractable locking pin axially movable on one member and an axially extending socket on said other member, adapted to receive said locking pin, d) said slide means comprising a manually engageable release collar axially movable on the said one strut member, and means for operatively connecting said release collar to the said locking pin, e) said one strut member having a tubular end, f) an end fitting being carried in said tubular end of the strut member, g) said release collar being slidably carried on and surrounding said tubular end, h) said locking pin being movable and held captive in said end fitting, i) said axially movable locking pin having an annular groove, j) said end fitting having an annular internal groove, k) washers disposed in said annular grooves, and l) a compression spring located between the said washers and disposed on the axially movable locking pin.