Abstract: A flexible cable holder is disclosed comprising a flexible web with a plurality of edge fasteners along opposite edges of the web. The edge fasteners are engaged, forming an enclosed duct for retaining cables, wires and power cords. End fasteners are provided at the ends of the web for attaching adjacent cable holders end-to-end. The web is flexible allowing the cable holder to form bends without special fittings or devices. End fasteners may be connected to edge fasteners to form branch connections.

Abstract: A programmable channel emulator is disclosed which exercises a control unit to which it is attached to detect timing problems or error conditions in the control unit. A plurality of channel emulators can be concurrently operated in order to exercise the control unit in a multiple channel environment. The operation of the plurality of channel emulators is synchronized and controlled by a shared processor in order to emulate possible multiple channel situations that the channel control unit could encounter. Included in this system is a programmable delay circuit that operates under software control to provide a precisely controlled delay between receipt and transmission of signals between each emulator and a connected channel.

Abstract: A prefabricated fireplace structure is convertible to function as an open fireplace or an enclosed, solid fuel burning stove. An outer fireproof cabinet for installation in existing building framing or new construction, receives a selected compatible firebox in the form of a log-burning fireplace or a substantially enclosed wood/coal-burning stove. The selected firebox includes a damper and an exhaust outlet therein, which exhaust outlet is connected to a flue pipe in the outer cabinet. A unique connecting device secures the selected firebox in the cabinet and further includes a means for sealing the connection of the exhaust outlet to the flue pipe inlet.