Abstract: Apparatus and methods for generating pulse pacing in a wearable cardioverter defibrillator (“WCD”). In one aspect the WCD circuitry includes a power source such as a battery coupled to a charger that provides charge energy to an energy storage module. Control circuitry is operatively coupled to the charger and the output circuitry, and configured to cause the WCD circuitry to generate pacing pulses delivered to therapy electrodes (attached to an ambulatory patient) without a current source. The WCD circuitry includes one or more processing elements that are used to execute instructions provided by one or more software modules that are configured to support various functionality, including controlling generation of pacing pulses.

Abstract: An electrical resistance heater comprises a planar structure having a plurality of elements arranged in parallel side-by-side relationship. Each element comprises a casing containing a resistance heating wire which is embedded in a matrix of a material of good thermal conductivity. The casing has an upwardly radiating surface provided with a series of convolutions of which the re-entrant portions communicate with openings extending through the heater.

Abstract: A plurality of inertial measuring unit (IMU) modules (41A, B, C and D) each comprising gyros and accelerometers (61, 65 and 67) for sensing inertial information along two orthogonal axes, are strapdown mounted in an aircraft, preferably such that the sense axes of the IMUs are skewed with respect to one another. Inertial and temperature signals produced by the IMU modules, plus pressure signals produced by a plurality of pressure transducer modules (43A, B and C) and air temperature signals produced by total air temperature sensors (45A and B) are applied to redundant signal processors (47A, B and C). The signal processors convert the raw analog information signals into digital form, error compensate the incoming raw digital data and, then, manipulate the compensated digital data to produce signals suitable for use by the automatic flight control, pilot display and navigation systems of the aircraft.

Abstract: Mesh structure comprises an array of interconnected members of which some are pre-formed. At least some of the pre-formed members comprise or contain single elongate components of synthetic plastics material of which the molecular structure has been orientated in a direction corresponding to the longitudinal axis of said members.