Abstract: A cartridge for supplying a record medium to a strip chart recorder and method of using the same therewith. A pivoting member of the cartridge is engaged with a support member of the mechanism; the cartridge is pivoted about the support member into an operative position in the mechanism; and the cartridge is releasably secured against disengagement from the operative position.

Abstract: Automated chemical analysis apparatus is disclosed for testing a plurality of chemical samples in variable testing sequences. In the preferred embodiment, the apparatus is operative to test bacterial sensitivity to a plurality of drugs, each of which may have varying concentrations. More specifically, one, two or three concentrations of each of a plurality of drugs may be tested in accordance with sequence command information on a source/record card which is automatically entered into the apparatus. The results of the variable sequence testing are recorded directly on the card adjacent to the identification of the drug being tested.

Abstract: A method and apparatus for generating a digital image representation of a printed circuit board. The board has a substrate of insulating material. A pattern of metallic conductors is disposed on a surface of the insulating material. A beam of light energy scans this surface in a predetermined pattern. The beam has an energy level high enough to induce a detectable fluorescence in the surface of the insulating material. This fluorescence is detected and a binary signal is generated to indicate the presence or absence of fluorescence as the beam scans the surface. The binary signal is synchronized with the scanning of the beam such that a binary image representation of the board's surface is provided.

Abstract: The present invention relates to a memory circuit including an array of inversion controlled switches arranged in an arbitrary number of rows and columns. Each inversion controlled switch is provided with emitter, base and collector terminals, and is characterized by first and second impedance states between its emitter and collector terminals.