The invention relates to a directly hydraulically damping broadband damper designed as a sequence of Helmholtz resonators with elastomer/gas springs to damp pressure pulses in pressurized liquids and in the audible range frequencies, in particular in hydraulic servo systems.

A pulse laser which outputs a pulsed laser beam, comprises a delaying means which delays the timing of shift from off to on of a laser output timing signal which is turned on during the output period of the pulse laser for the time required to output one laser pulse and an average output measuring means which measures the average output of the pulse laser while the laser output timing signal is on. The average output of the pulse laser is accurately measured by eliminating the influence of giant...

A system for generating a pulse signal in response to a clock signal includes a latch module for generating a latched output in response to a leading edge of the clock signal. A delay module is coupled to the latch module for delaying the latched output. A first logic device having a first input terminal coupled to the latch module and a second input terminal is coupled to the delay module for generating the pulse signal, which has a pulse width determined by a delay time of the latched output p...

A pulse laser system for providing precise control of laser pulse energy. A fast pulse energy detector having response time in the nanosecond or sub-nanosecond range provides an electrical signal representing pulse energy to a trigger circuit, which integrates the signal and triggers an electro-optic switch when the integrated signal reaches a predetermined level. The operation of the electro-optic switch trims a portion of the pulse energy so that the resulting pulse energy is maintained at a c...

The invention relates to pulse oximeters used to measure blood oxygenation. The current trend towards lower power consumption has brought a problem of erroneous readings caused by intrachannel crosstalk, i.e. errors due to the coupling of undesired capacitive, inductive, or conductive (resistive) pulse power from the emitting side of the pulse oximeter directly to the detecting side of the oximeter. The pulse oximeter of the invention is therefore provided with means for detecting whether intrac...

A pulse detection system for detecting pulses of sufficient magnitudes using a control detector providing crossing indications of pulses going beyond a threshold value, a stored threshold crossing adjustable actuator representing at least portions of selected crossing indications previously stored therein but reduced in magnitude as controlled by a magnitude reduction controller acting over time. An output detector may be used to detect signals going beyond another threshold.

A pulse oximeter includes light-emitting devices for irradiating different wavelengths of light into a living tissue through which arterial blood flow, a light-receiving device for detecting at least one of transmitted and reflected light after the different wavelengths of light have been absorbed by the living tissue, first correlation function computing device for determining first correlation function for the waveform of received light at one of the different wavelengths obtained from the out...

The invention is an impulse wrench that employs a fluid coupling between its anvil and hammer members. The tool includes a pulse cylinder that forms the tool's hammer and has a shaped inner surface that defines a side wall of a fluid-filled chamber. An end portion of the anvil is received within the chamber and includes two retractable vanes that sweep the pulse cylinder's inner surface when the pulse cylinder is rotating about the anvil. To achieve only a single impact per revolution of the pul...

A split signal pulse generator ("SSPG") that generates a difference signal from two split signals from a splitter module, where one of the split signals may be time delayed by a delay module, where the delay module may be a transmission line having a time delay or an adjustable delay line. The SSPG may include an input amplifier configured to shape an input signal received by the splitter module. A method of generating a difference signal is also provided.

The disclosure is directed to an internal pulse generator outputting a signal with a constant pulse width nevertheless of a frequency of an input signal, including a first PMOS transistor, a PMOS second transistor and an NMOS transistor which are connected between a power supply voltage and a ground voltage in series, a latch and an inverter which are connected between an output terminal and a first node as a drain of the NMOS transistor, and a Y-time delay circuit connected between the output t...