Abstract: A drop height recorder apparatus includes a housing suitable for packaging for shipment from an origin point to a destination point, a triaxial accelerometer provides three signals to corresponding high gain and low gain channels. The three high gain channel signals are full wave rectified to change any negative signals to positive signals for summing into a single high gain "zero G" (free-fall) channel. AN analog to digital converter is connected to the three low gain channels, the single high gain channel, and to auxiliary sensors for digitizing the analog signals. A recorder has a programmable controller connected to the ADC for setting the digital sampling rate. The digitized low gain channel signals are passed through a digital trigger threshold comparator for comparison with a reference signal for generating event detecting trigger signals on the way to a delay memory which also receives the digitized high gain zero G signal and auxiliary signals.

Abstract: An electronic ignition control system having a magnetically triggered input has an electronically controlled duty cycle to improve output voltage from a standard ignition transformer at increased engine speeds. A pulse width forming amplifier consisting of multiple transistor stages and associated components provides a power amplifying function combined with a timing function for improved ignition system performance. Sharp rise time pulses and noise immunity are realized by use of multiple feedback loops and low pass filtering. Coupled to the pulse width forming amplifier is a Darlington amplifier as an output stage for reduced power consumption and dissipation. The Darlington amplifier output stage provides a decrease in turn off time with a corresponding decrease in switching losses. The output of the Darlington amplifier drives a standard ignition transformer coupled to a spark source through a rotary distributor.