Tiltably-removable automatically-locking window sash

Claim 1

A tilt-out window construction comprising a support frame having a guide channel with an elongated opening, a sash mounted for vertical movement in said frame which is pivotal about an axis normal to said movement into a position extending out of said support frame, a sash balancing mechanism disposed in said guide channel, a vertically slidable slide block mounted in said guide channel connected to sash balancing mechanism said slide block having a generally rectangular shape with means at the head for receiving attaching means to the balance mechanism, and a transverse partial bore therein integral with said block directed to said elongated opening, said transverse partial bore having an out of round rotary locking element with a camming surface rotatably journaled therein, and a deformable, flexible leg integral with said slide block extending from the head of said slide block and out of contact with said slide channel, said deformable flexible leg having an extension on one side with a locking surface for contacting said side channel, said extension of said leg with said locking surface being located in a position with respect to said rotating locking element so that said locking surface is spaced away from a line extending from the center of said rotating locking element through the line of contact of said rotating locking element with said resiliently flexible arm, said out of round rotary locking element being connected to said sash and actuating said locking surface into engagement with said channel in response to the tilting of the window sash.