Abstract: A security system comprising an attachment (1) for mounting on a wall top, having a first part (4) that is fixable to the wall and a second part (6) that is mounted for relative movement on said first part upon the application of a force thereto whereby movement of the second part generates a signal to activate a visual and/or audible alarm, the second part having at least one pair of opposing members (40a, 40b) for partially overlapping a side of the first part so as to retain the second part, the second part being sized so as to allow a limited range of movement with respect to said first part without its release therefrom.

Abstract: A security system comprising an attachment (1) for mounting on a wall top, having a first part (4) that is fixable to the wall and a second part (6) that is mounted for relative movement on said first part upon the application of a force thereto whereby movement of the second part generates a signal to activate a visual and/or audible alarm, the second part having at least one pair of opposing members (40a, 40b) for partially overlapping a side of the first part so as to retain the second part, the second part being sized so as to allow a limited range of movement with respect to said first part without its release therefrom.

Abstract: A sensor assembly having senser fingers swingably mounted upon a rotatable support and resiliently biased to extend radially outward. In the three-finger embodiment, a detent assembly rotatable with the support detents the support through a 120 degree rotation when the nose of a signature engages the finger lying in the path of signature movement. A one-way clutch cooperates with the detent assembly to dampen movement of the fingers and cooperating rotatable support to prevent oscillation of the rotating members. The finger advanced to the detent position slides upon the adjacent surface of the last counted signature and is freely yieldable to prevent irregularities in the signature from causing an erroneous count.