frame 12 as the inner frame 16 is guided into the outer frame 12 the flexible member 34 is depressed increasingly towards the rigid member 44 this ensures a snug friction fit between the outer frame 12 and the inner frame 16 fig5 provides a view from the interior side of the window assembly showing an example configuration of a plurality of frame clips 14 as the locking portion 36 passes the dovetail section 28 of frame clips 14 the free end of dovetail section 28 is deformed towards the connector section 30 as the locking portion 36 nears abutment wall 24 the locking portion 36 snaps into dovetail section 28 with the free end 31 of the dovetail section 28 returning to its original orientation with respect to connector section 30 during this operation the flange 32 of the inner frame 16 exerts force against the front surface 20 of the outer frame 12 which results in a corresponding exertion of force by the abutment surface 51 on the locking portion 36 on the dovetail section 28 once the inner frame 16 is fitted into the frame clip 14 the flange 32 remains biased against the front surface 20 of the outer frame 12 and the locking portion 36 continues to exert a corresponding force on the tip of the free end 31 of the dovetail section 28 as a result the inner frame 16 is securely engaged with the outer frame 12 by the frame clip 14 further the flange 32 forms a seal with the front surface 20 to prevent leakage of various environmental agents into the window assembly 10 apparatus now referring to fig2 and 6 the window frame 18 is suited for holding a glass window pane 52 and.