Abstract: A cardiac monitoring and defibrillation system is provided which may be embodied as a bedside unit or as an ambulatory unit. The system includes amplification and processing circuitry which receives and conditions inputs from a variety of sensing means such as an electrocardiogram, a blood oxygenation sensor, a blood pressure monitor, and a cardiac acoustical transducer. A noise and artifact discrimination procedure is employed to prevent erroneous detection of the onset of cardiac arrhythmias. In response to the conditioned inputs from the monitoring means, the microprocessor controls therapeutic electrical stimulus which may be delivered to a patient in accordance with a cardioverter/defibrillator step therapy method. The microprocessor may be operated or programmed by means of a control panel or an external programming and monitoring unit.

Abstract: A color printer includes a print head assembly including a plurality of independently actuable print heads serially arranged along a printing direction. Each print head includes a plurality of impact pins and an associated different color printing ribbon having a portion disposed between the associated print head and a media to be printed upon. The serial alignment of the print heads enables four color images to be produced by a single pass of the print head assembly along the media in a printing direction. Control apparatus includes pulse modulation circuitry for controlling the impact force of each impact pin to cause intensity modulation of printed colored marks. In addition, a feedback system enables the control apparatus to vary the impact force of each impact pin to maintain good color fidelity.

Abstract: A color printer includes a print head assembly including a plurality of independently actuable print heads serially arranged along a printing direction. Each print head includes a plurality of impact pins and an associated different color printing ribbon having a portion disposed between the associated print head and a media to be printed upon. The serial alignment of the print heads enables four color images to be produced by a single pass of the print head assembly along the media in a printing direction. Control apparatus includes pulse modulation circuitry for controlling the impact force of each impact pin to cause intensity modulation of printed colored marks. In addition, a feedback system enables the control apparatus to vary the impact force of each impact pin to maintain good color fidelity.

Abstract: A large screen display system for video modulated collimated light provides superior contrast and brightness, in a shallow depth configuration if desired. A single modulated laser beam which may have different color components is raster scanned, defining a beam envelope which is then expanded along an adequately long optical path length within a confined volume and directed toward a display screen on which the beam impinges. The optical system may selectively redirect the available light energy into a viewing volume with optical gain and with high contrast. In a particularly compact example of a rear projection system, the optical path is defined by successive reflecting elements adjacent and substantially coextensive with the screen, which cause the beam path to traverse behind the screen in successive path segments. The beam envelope is then directed obliquely against the display plane, but differentially redirected so as to be transmitted orthogonally outwardly.