Abstract: A bus safety system for reminding a driver to search a bus for passengers comprising a receiver module incorporating a microprocessor, the receiver module programmed to control an alarm based on at least one selected time interval following activation; a wire harness attachable between the receiver module and an electrical system of the bus; and a transmitter incorporating an alarm deactivation switch and adapted to send RF signals; wherein the receiver module is adapted to receive the RF signals from the transmitter.

Abstract: A bus safety system for reminding a driver to search a bus for passengers comprising a receiver module incorporating a microprocessor, the receiver module programmed to control an alarm based on at least one selected time interval following activation; a wire harness attachable between the receiver module and an electrical system of the bus; and a transmitter incorporating an alarm deactivation switch and adapted to send RF signals; wherein the receiver module is adapted to receive the RF signals from the transmitter.

Abstract: A bus safety system for reminding a driver to search a bus for passengers comprising a receiver module incorporating a microprocessor, the receiver module programmed to control an alarm based on at least one selected time interval following activation; a wire harness attachable between the receiver module and an electrical system of the bus; and a transmitter incorporating an alarm deactivation switch and adapted to send RF signals; wherein the receiver module is adapted to receive the RF signals from the transmitter.

Abstract: A golfing apparatus for estimating the carry distance of a struck golf ball includes a doppler radar unit, a correlating circuit and a display. The doppler radar unit measures the doppler shift of the struck golf ball and a predetermined, empirically derived factor is used to correlate the measured doppler shift to an estimated carry distance for the ball. The display shows the estimated carry distance.

Abstract: A golfing apparatus includes a speed measuring mechanism, a saturation detector, either an acoustic trigger or an optical trigger, a correlator and a display. The speed measuring mechanism has a boresight disposed at an angle with respect to level ground so that it can be aimed at the golf ball while in flight. Either the acoustic trigger or the optical trigger generates a trigger signal in response to either the sound or the sight of the struck golf ball. The saturation detector detects movement of either a club head or the struck golf ball and provides an indication signal that there is a STRONG SIGNAL condition. The trigger signal and the indication signal are ANDED together in order to turn on the speed measuring mechanism to allow the measurement of the speed of the golf ball. The speed measuring mechanism measures the component of the speed of the golf ball which is parallel to the boresight.

Abstract: A golfing apparatus determines the carrying distance of a golf ball which has a golfer has struck and includes a speed measuring mechanism, either an acoustic trigger or an optical trigger, a correlator and a display. The speed measuring mechanism has a boresight disposed at angle in the range of zero degrees to twenty five degrees with respect to level ground so that it can be aimed at the struck golf ball while in flight. Either the acoustic trigger or the optical trigger is electrically coupled to the speed measuring mechanism and turns on the speed measuring mechanism in response to either the sound of the struck golf ball or the sight of the golf club striking the golf ball, respectively. The speed measuring mechanism measures the component of the speed of the golf ball which is parallel to the boresight.

Abstract: A golfing apparatus for determining the carry distance of a golf ball in flight includes a doppler radar unit, a measuring cone, a correlating circuit and a display. The doppler radar unit has a housing, a transmitter and receiver unit and a counter. The transmitter and receiver unit is disposed in the housing and transmits electromagnetic energy towards the golf ball in order to produce a plurality of pulses which is the Doppler shift of the electromagnetic energy. The counter is electrically coupled to the transmitter and receiver unit and counts the plurality of pulses over a preselected period of time. The golf ball passes through the measuring cone and the doppler radar unit measures speed of the golf ball therein. The correlating circuit is electrically coupled to the doppler radar unit and correlates the measured speed of the golf ball with a carry distance.

Abstract: A battery-operated portable breath tester is disclosed. The breath tester includes a housing which defines a sleeve for receiving a wand. The wand defines an internal sample chamber, with a lamp at one end for providing infrared energy and a detector at an opposite end for receiving the infrared energy after it has passed through the sample to be tested. The wand defines opening extending from the internal sample chamber to the outside of the wand. The wand has an external shape providing a snug fit within the sleeve. As the wand is moved within the sleeve, gas is purged from the wand. The wand is connected to the housing by means of an electrical coil. The housing encloses a digital voltmeter including a digital display for providing a test readout. The digital voltmeter includes an oscillator which is coupled through a frequency divider and a transistor switch to the lamp.

Abstract: A method and apparatus for determining the concentration of a predetermined energy absorbing compound in a breath sample even in the presence of other unknown energy absorbing compounds. Infrared energy of three wavelengths are passed through the collected sample. The first wavelength of infrared energy, 3.95 microns for example, is selected to be insensitive to absorption by both the predetermined energy absorbing compound such as ethanol and the unknown energy absorbing compounds such as acetone and water vapor. The second wavelength of infrared energy, 3.48 microns for example, is selected to be significantly absorbed by ethanol. The third wavelength of infrared energy, 3.39 microns for example, is selected to be significantly absorbed by acetone and water vapor.