A pulse encoder has a motor detecting portion (1) which detects a motion of an object whose position should be measured and which outputs a signal having information regarding the motion. A clock generator (3) outputs a clock pulse. The pulse encoder processes the information regarding the motion synchronized by the clock pulse. The pulse encoder includes a clock malfunction detecting portion (4) which receives the clock pulse and at least a part of the signal having information regarding the mo...

Improved pulse dampers are received within compressor housings. This is an improvement over prior art systems which topically attached a pulse damper outwardly of the compressor housing. The improved pulse dampers have various configurations to reduce the magnitude and timing between pulses. This in turn reduces the noise caused by the pulses.

A pulse combustor having a combined mixing and ignition chamber in communication with a fuel inlet tube and an air inlet tube. The fuel inlet tube and air inlet tube inject fuel and air, respectively, forming a fuel/air mixture in the mixing and ignition chamber. An ignition source for igniting the fuel/air mixture is located within the mixing and ignition chamber. A main combusiton chamber is sealably secured to the main combustion chamber wall and in comunication with the mixing and ignition c...

A pulsation damper is disclosed for use in a standard air-conditioning compressor for an automobile. The pulsation damper consists of a body portion and a cap portion and the cap portion has an outer diameter that is dimensioned to be press fit within the outlet opening of the housing of the air compressor. Thus, the pulsation damper can be retro-fit in a standard air compressor housing and will not increase the overall size of the housing or require modification in the connecting tubing. The bo...

A pulse compressor consisting of a loaded transmission line having a pluraltiy of sections which have a ratio of dispersion to nonlinearity that decreases in the direction of pulse transmission.

A pulse oximeter having a sensor responsive to light transmitted through an area of blood flow which is optically absorbed by hemoglobin for producing a pulsatile waveform indicating the current pulsatile component of blood flow. A process waveform is created for tracking the process of the oximeter during its determination of a maximum and a minimum value of the pulsatile waveform, which is used for calculating the saturation of oxygen.

Electrical pulse width measuring apparatus wherein the presence of a pulse of unknown time duration is utilized to initiate generation of a reference pulse of known time duration. The reference pulse is generated by means including a monostable multivibrator together with a controlled driving circuit connected to the multivibrator timing capacitor. The time duration of the reference pulse accordingly is made linearly proportional to an input control variable such as a manually adjustable dial se...

An improved pulse oximeter incorporating an innovative method for exposing a patient's extremity to electromagnetic radiation of two wavelengths, e.g., a red wavelength and an IR wavelength, and detecting the absorbance of the extremity at each of the wavelengths, said method comprising the steps of: (a) generating overlapping first and second pulse trains of electromagnetic radiation having first and second wavelengths and having the same frequency but differing in phase by 90 degrees; (b) expo...

A system uses a charge storage unit to produce shaped pulses in response to an incoming digital signal. The system detects transitions or patterns in the digital signal and produces a charging waveform that controls the charge maintained in the charge storage unit, and thus, the instantaneous value of an output voltage produced by the unit. The charging waveform is, in turn, controlled by transition characteristics or counts that are stored, respectively, in transition memories. In the case of a...

A pulse generator which can be used for a printer, for example an ink jet printer, to provide adjustable pulses per unit displacement or speed has a linearly or rotatably displaceable first plate with a periodic pattern of different optical density or transmissivity or reflectivity juxtaposed with a second plate with another array of markings of different optical density transmissivity or reflectivity so that in an overlapping region a Moire pattern or other interference pattern for beat pattern...