Abstract: A foamed plastic insert compresses to fit into the corner moulding or corner piece of vinyl siding or other synthetic siding. The corner piece is formed with an angled web member and undercut flange members offset from the web member and joined to it by sharp bends. The web member and the flanges define a wedge-shaped void, and each of the undercut flanges defines an outward-facing recess to receive ends of the siding members. The insert comprises a resilient L-shaped open- or closed-cell foam member, having legs that compress to fit snugly within respective spaces inside the sharp bends, and defining a V-shaped valley at its back side. When the moulding and inserts are installed, the valley biases against the corner of the sheathing of the frame building beneath the corner moulding. The insert also fills the open interior profile of the moulding. This blocks drafts, dust, moisture and insects from entering the structure through the corner moulding.

Abstract: A small, compact motion detector alarm is sensitive to low frequency vibration (20 to 250 Hz) and emits an alarm sound when this vibration is detected. A piezoelectric transducer element serves as a low frequency sensor and also produces an alarm sound near its resonance, nominally 5 KHz. When low frequency vibrations occur, a detector formed of a amplifier and a current comparator actuates a one-shot which turns on an oscillator circuit to drive the transducer. A time out circuit disables the one-shot for a few seconds after the alarm has sounded, so that the device can return to its standby state. The alarm can be made to emit in the human audible range or in the ultrasonic range, which will be effective with pets but will not disturb humans.