Abstract: A dual arbor scrap chopper is disclosed having a number of chopper blades attached to each arbor. The blades are designed to be more easily fitted into a blade recess formed on the arbor, and are preferably designed to provide a blade cutting surface which more closely resembles the optimal elliptical shape without the need for complex cutting patterns. A dual arbor scrap chopper with improved blade performance and ease of blade change-over is provided.

Abstract: A bridging web for linking a first and second wall panel, the first and second wall panels extending parallel to one another. The bridging web has a first and second end member, each of which extend between a first edge mountable within the wall panels and a second edge. The second edge has a first hinge element. The first end member is mountable within the first wall panel and the second end member is mountable within the second wall panel. A central section extends between a pair of second hinge elements and is mountable between the first hinge element of the first end member and the first hinge element of the second end member. One of the first and second hinge elements is a pin and the other of the first and second hinge elements includes at least one first knuckle and at least one second knuckle. The pin defines a vertical hinge axis. The first knuckle is vertically displaced from the second knuckle, and the first and second knuckles are adapted to bear on opposing surfaces of the pin.

Abstract: An electronic device that functions as an area-intrusion informing device for announcing the unauthorized entry into an enclosure or area which has at least one access opening and closing means. The device uses components that are small for inconspicuous insertions, or for surface mounting, and preferably utilizes a dummy hinge arrangement as an electrical conductor between the various components. The device is used for access doors, windows, filing cabinets, desk draws, closets, and the like, and typically includes at least one light emitting diode, an optional numeric liquid crystal display, a timer, and alert signaling and reset components. The components act together to provide notification of illegal entry between the times of departure, and arrival, of authorized users of the enclosure or area. A simple security alert system is provided.