Sliding window lock

Claim 1

A sliding window lock for a sliding window having a pair of substantially parallel units each of which is slidable, relative to the other and which are positionable with a first of the units having a bottom edge portion and the second of the units having a top edge portion overlapping the bottom edge portion of the first unit, said lock comprising a substantially plate-like clip member bent at one end at substantially right angles to the remainder thereof to form a head part, the clip member being positioned inside the window between the first and second units with the head part thereof fitting over the edge of one of the units, said clip member having a slot formed therethrough in the remainder thereof and extending longitudinally therealong and serrations formed in the surface of said clip member along the slot and extending from both longitudinal edges of the slot substantially perpendicularly thereto; a substantially elongated clamp member bent at one end at substantially right angles to the remainder thereof to form a first head part, bent at the first head part at substantially right angles to the remainder of the head part to form a lip, and bent at an opposite end at substantially right angles to the remainder thereof to form a second head part extending in a plane substantially parallel to the first head part, the first and second head parts extending in opposite directions from the remainder of the clamp member, said second head part having a free edge and a cutout formed therein for accommodating the clip member, the clamp member being positioned inside the window in operative proximity with the clip member with the first head part thereof fitting over the edge of the other of the units bordered by the lip thereof, said clamp member having a bore formed through the remainder thereof; and fastening means for releasably affixing the clamp member to the clip member inside the window thereby preventing relative movement of said members and said window units, said fastening means comprising a bolt passing through the slot and the bore and having a head with a serrated undersurface in abutment with the serrations in the surface of the clip, and a wing nut threadedly coupled to the bolt and releasably securing said bolt.