Abstract: A portable hand-held spirometer is disclosed for use in taking respiratory tests and storing and displaying test results. The configuration of the spirometer includes handgrips that are positioned to ensure that the user is properly positioned to provide maximum breathing required for valid test results to be obtained. The spirometer also includes a progressively illuminated indicator that can be viewed by the user during a test to provide an indication in real-time to the user of the expected/desired duration of the exhalation or inhalation test. The indicator is completely illuminated only when the measured accumulated volume of air passing through the spirometer equals a predicted volume determined based on the age, gender, height, weight and ethnicity of the user stored in the spirometer. The structures and arrangement of a turbine assembly and sensors is also disclosed. Further, a method of receiving, storing and displaying information on the spirometer via a color touch screen display is also disclosed.

Abstract: A portable hand-held spirometer is disclosed for use in taking respiratory tests and storing and displaying test results. The configuration of the spirometer includes handgrips that are positioned to ensure that the user is properly positioned to provide maximum breathing required for valid test results to be obtained. The spirometer also includes a progressively illuminated indicator that can be viewed by the user during a test to provide an indication in real-time to the user of the expected/desired duration of the exhalation or inhalation test. The indicator is completely illuminated only when the measured accumulated volume of air passing through the spirometer equals a predicted volume determined based on the age, gender, height, weight and ethnicity of the user stored in the spirometer. The structures and arrangement of a turbine assembly and sensors is also disclosed. Further, a method of receiving, storing and displaying information on the spirometer via a color touch screen display is also disclosed.

Abstract: A portable hand-held spirometer is disclosed for use in taking respiratory tests and storing and displaying test results. The configuration of the spirometer includes handgrips that are positioned to ensure that the user is properly positioned to provide maximum breathing required for valid test results to be obtained. The spirometer also includes a progressively illuminated indicator that can be viewed by the user during a test to provide an indication in real-time to the user of the expected/desired duration of the exhalation or inhalation test. The indicator is completely illuminated only when the measured accumulated volume of air passing through the spirometer equals a predicted volume determined based on the age, gender, height, weight and ethnicity of the user stored in the spirometer. The structures and arrangement of a turbine assembly and sensors is also disclosed. Further, a method of receiving, storing and displaying information on the spirometer via a color touch screen display is also disclosed.

Abstract: A portable hand-held spirometer is disclosed for use in taking respiratory tests and storing and displaying test results. The configuration of the spirometer includes handgrips that are positioned to ensure that the user is properly positioned to provide maximum breathing required for valid test results to be obtained. The spirometer also includes a progressively illuminated indicator that can be viewed by the user during a test to provide an indication in real-time to the user of the expected/desired duration of the exhalation or inhalation test. The indicator is completely illuminated only when the measured accumulated volume of air passing through the spirometer equals a predicted volume determined based on the age, gender, height, weight and ethnicity of the user stored in the spirometer. The structures and arrangement of a turbine assembly and sensors is also disclosed. Further, a method of receiving, storing and displaying information on the spirometer via a color touch screen display is also disclosed.

Abstract: AC power loads such as from transformers, motors, high in-rush heaters, air conditioners, etc., are controlled by the use of bipolar transistors, FET transistors, gate turn-off SCRs and IGBT to turn on the load at zero-cross over and to turn off the load at any point in the sine wave which produces the desired amount of power. This reduces RFI and virtually eliminates di/dt at turn on since both voltage and current start at the same zero cross-over, and hence will improve the power factor. Both analogue and digital logic systems can also be utilized to produce this type of phase control, and a wide variety of possibilities are available such as serial and parallel input, the use of full wave bridge control, etc.

Abstract: A solid state control device is disclosed for controlling power turn-on times to process systems such as heaters used in glassmaking, in petrochemical plants, in furnaces, and for electromotive, and other devices.A command signal from the process control is fed to the device in either parallel digital, serial digital, or in analogue form. The command signal is then converted to a binary signal suitable for controlling a phase delay counter.The phase delay counter receives a high frequency clocking signal and produces a very finely divided half cycle output. This provides a line frequency power control signal which is synchronized with command signal. The counter output is fed to gate drivers that actuate a turn-on device such as an SCR or triac to control the process system within a finely divided time period corresponding to a single time division of each half cycle.

Abstract: A turn off circuit for a multiphase motor is provided, comprising a D.C. powered system including a three element choke core having two outer cores with loosely coupled windings and a central core closely coupled to the outer cores to enhance pulse generation.A modified SCR ring counter is provided to supply D.C. power to the load to produce a three phase wave shape with less wave distortion and lower noise.Pulse width modulation is supplied to the negative SCRs of the ring counter through steering SCRs which are turned on by discharge from capacitors in the steering circuit.Pulse width modulation is fed to the ring counter through the outer core elements, while the central core functions to improve pulse width of the discharge capacitors. Free wheeling energy from the motor is fed to the discharge capacitors and increases firing energy.

Abstract: A turn off circuit for a multiphase motor is provided comprising a DC powered system including a three element core having a central core element and an inner and outer core element coupled thereto.A series of capacitors are connected to an outer core element to discharge simultaneously and turn off positively and negatively biased SCRs which sequentially fire and produce a suitable pulse width and frequency to the motor.A control system is provided to produce a variable pulse frequency and pulse width to a power circuit which sequentially fires and admits battery power to the motor.

Abstract: A turn off circuit for a multiphase motor is provided comprising a DC powered system including a three element core having a control core element and an inner and outer core element coupled thereto.A series of capacitors are coupled to the central core winding to produce suitably shaped pulses to turn off positively and negatively biased SCRs which control power switching SCRs.A control system is provided to produce a variable pulse frequency and pulse width to a power circuit which sequentially fires and admits the battery power to the motor.