With a gas exchange valve of an internal combustion engine having a hollow valve shaft (1) and valve disk (7), wherein the valve disk (7) has a valve tray (5) and a valve cone (6) connected to the outer edge thereof, whereby the valve cone (6) tapers with an increase in distance from the valve tray (5); the hollow valve shaft (1), passing completely through the space surrounded by the valve cone (6), is fixedly connected to the valve tray (5) at one end and at the other end is fixedly connected ...

A hinge buffer device includes a casing, a slide, a buffer and an adjustment. The casing comprises a first end, a second end, a pair of lugs, a threaded hole, and a sliding trough. The lugs are disposed at two sides of the first end of the casing. The threaded hole is formed at the second end of the casing. The sliding trough is located between the first end and the second end of the casing. The slide comprises a compartment, a pair of sliding sections at respective sides to be engaged with the ...

A system includes multiple packet-based communication devices that support audio output and other suitable functionality and an acoustic space management device that manages these devices to provide telephony services within acoustic spaces. These devices can coordinate their actions to provide audio services, such as conferencing, paging, broadcasting, and other appropriate audio services.

The output power of an RF power amplifier is controlled using a feedback loop including a differential integrator for controlling the amplifier's bias voltage. The gain of integration in the differential integrator is varied so as to compensate for variations in the derivative of the power amplifier output power versus the bias voltage.

A fault detection apparatus of a power source provided with a central processing unit, a power source, a power receiver supplied with current from a power source, a unit periodically accessing the power receiver from the central processing unit so as to supply a periodic current periodically repeatedly turning on and off from the power source to the power receiver, and a unit judging the power source to be defective when the output voltage of the power source exceeds a predetermined threshold va...

A method for securing a closure on a cylindrical container (such as a pharmaceutical vial) includes: positioning a closure in a first position, the closure being substantially centered via a centering assembly along an axis that is generally normal to the closure; translating the substantially centered closure along the axis to a second position; positioning a cylindrical container, the container being substantially centered via the centering assembly along the axis; translating the substantiall...

In an active matrix electroluminescent display device a storage capacitor (24) is provided in each pixel for storing a voltage to be used for addressing a drive transistor (22) which controls the illumination of the electroluminescent display element (20). A discharge photosensitive element (34) is provided for discharging the charge storage capacitor in dependence on the display element's light output. A further photosensitive element (40) is provided so as to cancel photocurrents produced in t...

An anomaly control device for a dual fan of computer is composed of a first and second coil, a first and second driving IC, a controller, and a voltage level comparing circuit. The voltage level comparing circuit will perform a voltage dividing to a first and second reference potential signals input from the first and second driving ICs to obtain a third reference potential signal which is compared with a reference pulse wave signal output from an output end of the first driving IC, to determine...

In some embodiments, a circuit includes a power amplifier including an input terminal configured to receive an input signal and an output terminal to provide an RF voltage, the output terminal coupled to a load, a current sensor configured to sense the current drawn by the power amplifier and provide a first sensor output signal dependent upon current consumption when the current exceeds a predetermined current threshold, a voltage sensor configured to sense the output power of the power amplifi...

Devices, softwares and methods send a warning signal when a periodic signal is present in the audio content of a VoIP connection. In response to the warning signal, an acoustic echo canceller of an IP telephone discontinues its adapting process. A signaling network switch detects when a periodic signal is present in the audio content, and issues a warning signal. A signaling call manager device, when it transmits a tone that has periodicity, it also transmits a warning signal.