Abstract: An edge concealment system for abating electrical discontinuities between externally exposed edges of adjacent surface pieces separated by a gap. The system includes a cover component shrouding each edge and able to absorb or conduct incident radar energy. A male element and a female element extend between the cover component and the surface piece for positive engagement of the male element within the female element and retention of the cover component with the surface piece. Preferably the engagement of the male and female elements includes an audible signal such as a click sound when the engagement occurs so that operators are confirmatively advised upon positive placement.

Abstract: A mixing system comprising (1) a mixing cartridge comprising a housing containing: (a) an internal chamber, (b) access means for entry of a liquid into the internal chamber, and (c) a magnetically movable detached mixing member contained in the chamber; and (2) a control device comprising a second housing containing: (a) a detection system adapted to measure a property of a liquid at a prespecified first location in the chamber of the mixing cartridge, (b) means for holding the cartridge so as to register the chamber with the detection system, and (c) means for magnetically imparting linear reciprocal motion to the mixing member, whereby the mixing member sweeps out a portion but less than all of the volume of the chamber, the motion generally occurring at a second location in the chamber different from the first location. The mixing cartridge itself is also a part of the present invention.

Abstract: A shield is provided for isolating excess liquid on the surface of a diagnostic cartridge from a monitor with which the cartridge is used. In a preferred embodiment the shield is a strip of flexible, resilient material which can lie flat while the cartridge is in its packaged condition but which automatically springs up to serve as a shielding surface when the cartridge is unpackaged and inserted into the monitor.