Abstract: A clip for fastening a screen to a frame the has a top and a bottom; an opening extending through the clip. A connector extends through opening to attach the clip to a door or window frame. A projection extends a vertical distance from an end of the clip for holding a screen in place. The clip bottom has a circular recess surrounding the opening. Attachable segments extend from the bottom of the clip having a diameter and a thickness and having an opening for receipt of a connector. The attachable segments bottom has a circular recess surrounding the attachable segments opening. The attachable segment top has a protruding ring that mates with the circular recess on the clip bottom or with a circular recess surrounding an attachable segment opening. The segments raising the vertical distance of the projection so the projection contacts the screen.

Abstract: According to the invention, a window guard having telescoping horizontal bars that have a predetermined minimum overlap of the telescoping bars which cannot be easily overridden by the window guard installer is provided. Such a device can reliably withstand a predetermined pressure when the window guard is extended to its maximum width.

Abstract: A teaching device for indicating in real time the movement of a selected part of a person's body beyond a desired boundary limit is provided, as well as a method for teaching a person to control his or her body movement in response to alarms provided by the teaching device. The teaching device includes an element for detecting movement of the selected body part beyond a boundary limit, a first alarm element for providing a first alarm indicating encroachment of a nominal misalignment zone in which the body part is nominally out of alignment with a preferred location thereof, and a second alarm element for providing a second alarm in response to encroachment by the selected body part of a significant misalignment zone in which the selected body part is significantly out of alignment with the preferred location thereof. The first alarm provided by a first alarm element is an intermittent beeping tone and a blinking light.