Abstract: A computer system which utilizes processor boards including a first level cache system integrated with the microprocessor, a second level external cache system and a third level external cache system. The second level cache system is a conventional, high speed, SRAM-based, writeback cache system. The third level cache system is a large, writethrough cache system developed using conventional DRAMs as used in the main memory subsystem of the computer system. The three cache systems are arranged between the CPU and the host bus in a serial fashion. Because of the large size of the third level cache, a high hit rate is developed so that operations are not executed on the host bus but are completed locally on the processor board, reducing the use of the host bus by an individual processor board. This allows additional processor boards to be installed in the computer system without saturating the host bus. The third level cache system is organized as a writethrough cache.

Abstract: A circuit that monitors and disables power supply signals to a microprocessor in a computer system utilizing a main power supply and secondary voltage regulators. The circuit detects whether the voltages supplied by the secondary voltage regulators to the microprocessor fall within a predetermined range that is governed by microprocessor requirements. If a supply voltage falls outside its specified range, the circuit turns on a metal-oxide-silicon field effect transistor (MOSFET) connected between one of the main power supply voltages and ground, effectively shorting the primary supply voltage to ground. This activates fault detection circuitry internal to the main power supply, causing the main power supply to shut down, thereby removing all power supply voltages to the microprocessor.

Abstract: Described is a column for separation of substance mixtures with a liquid. A cylindrical tube has a closure at each end. At least one of the closures is a movable piston. The piston has a socket which is radially expandable by axial pressing of two interacting conical parts for sealing of the piston against the inner wall of the column.

Abstract: A containment and guide arm for various leads extending from operating room monitoring devices such as a pulse oxygen metering unit and an EKG unit including a generally tubular member which is attachable to any stationary surface within the operating room or other such environment. A plurality of guide members are attached to the generally tubular member, each guide member including a plurality of guides or clamps for containing one or more leads extending from operating room monitoring devices thereby preventing the leads from being strewn about the operating room and hindering activity of doctors and nurses during operations. The containment and guide arm of this invention has similar application in other medical environments.

Abstract: Efficacious phenol-free mycobactericidal liquid compositions having low odor and irritation potential are disclosed. These compositions consist of a solvent containing a glycol, a 2 to 6 carbon atom aldehyde, specific anionic surfactants, and buffer salts to stabilize the pH in the 6 to 7.4 range. The ratio of glycol to aldehyde is comprised between 0.1 and 6.0. The lower this ratio, the greater the mycobactericidal activity. The new odorless compositions can kill Mycobacterium tuberculosis (EPA quantitative procedure) in 10 minutes or less at 20.degree. C.