Abstract: An improved lockable windowgate having manually operated latching menas for retaining a locking member in retracted condition against the force of gravity during the time period in which the gate is opened, so as to facilitate one-handed operation by a user. Several embodiments are disclosed. In a preferred embodiment, the latching member is in the form of a detent disengaged by downward pressure on the locking member.

Abstract: An improved lockable window gate including an outer frame element adapted to be secured within a window frame and a swingable gate element pivotally mounted upon the frame element and having a locked coplanar position. An improved locking mechanism provides for multiple locking locations therebetween, thus making the forcing of the gate more difficult. The overall dimensions of the frame element are adjustable to accommodate window openings of variable height and width by means of telescopic elements above and to one side of the gate element.

Abstract: A security window gate including a generally rectangular frame, and a swingable selectively locked gate associated therewith. Adjustment means is provided to permit a given sized gate to be installed within a range of rectangular window sizes without loss of tamper-proof ability. In a vertical direction, steel bars are provided with telescopic elements supported between a pair of adjacent parallel frame members. In a horizontal direction, an adjustable plate-like member of generally L-shaped cross section is provided with elongated slots for bolting to the frame element, the plate being cut to required length, if necessary, at the time of installation.