A regulation circuit for providing timing gate signals to the dc power section of a power supply, the regulation circuit utilizing phase angle conduction of a programmable unijunction transistor. The conduction angle is determined by the occurrence of the cycles of the ac source voltage unless earlier conduction is determined by the sensed dc voltage. Early conduction occurs when the control voltage to the PUT is allowed to build up beyond a predetermined level when the sensed dc voltage is low....

A regulation circuit for providing timing gate signals to the dc power section of a power supply, the regulation circuit utilizing phase angle conduction of a programmable unijunction transistor. The conduction angle is determined by the occurrence of the cycles of the ac source voltage unless earlier conduction is determined by the sensed dc voltage. Early conduction occurs when the control voltage to the PUT is allowed to build up beyond a predetermined level when the sensed dc voltage is low....

The inhibition or control of expression of IL-2 or IL-2.alpha. genes, and the inhibition or control of fundamental cellular processes responsible for retroviral replication, in particular HIV-I and HTLV-I DNA molecules, are disclosed. The invention is directed to nucleic acids or nucleic acid compositions which competitively bind regions of the IL-2 or IL-2.alpha. genes corresponding to their respective transcription factors. DNA or RNA fragments spanning the following regions in the IL-2 gene a...

A voltage regulator for generating a constant output voltage. The voltage regulator includes an output stage having an internal feedback loop connected to control a current delivered to or received from a load to maintain the output voltage substantially constant relative to an internal reference voltage. The voltage regulator further includes a second feedback loop connected to control the internal reference voltage to cause the output voltage to track an external reference voltage.

A pressure regulator whose initial pressure can be set by manually setting the initial stress of a control spring has a double-seated valve with an inner and outer valve seat and a valve closing element. The valve closing element divides a supply pressure chamber from a control pressure chamber and the latter from a pressure-relief chamber. The inner valve seat is arranged on a control piston which is loaded by the control spring. In order to set a higher initial pressure, the initial stress of ...

A regulating valve such as especially a water tap or mixing valve, having an inlet passage and an outlet passage and a valve passage located therebetween, the cross sectional area of said valve passage being adjustable by means of movable valve actuation member, the valve passage being shaped as an elongated slot in the wall of the inlet passage, extending generally in the axial direction of the passage, and the slot being formed between opposed edges which are operatively connected with the val...

The present invention discloses a process unit (10) comprising a real data generator (12), a buffer (14) buffering the data and a queue length monitor (16), which regulates the data generator (12) depending on the queue length. The system is characterized by a dummy load generator (18), storing dummy data in the same buffer (14) at a dummy data rate. The queue length monitor (16) regulates this dummy data rate. The process unit (10) may also be used in a system (1), further comprising a transmit...

The invention discloses a method of predicting the fluid level at a predetermined location in a fluid flow network (10) having at least one regulator (16, 18) to control the flow of fluid along fluid flow network (10). The method includes the steps of collecting data based on timed measurements of fluid levels upstream (24, 28) of at least one regulator (16, 18), fluid levels downstream (26, 29) of at least one regulator (16, 18) and the opening position (30, 32) of at least one regulator (16, 1...

Fluid regulation may be achieved by a process performed by a controller. The process may include regulating a first fluid with a fluid-driven fluid regulator, receiving a second fluid, receiving electric power generated using the second fluid, and controlling the fluid regulator with the second fluid. The process may also include determining whether wirelessly sent instructions regarding regulation have been received and, if wirelessly sent instructions regarding regulation have been received, a...

A ball valve for fluids comprises a body (11) provided with an inlet and an outlet (12, 13) and with an inner chamber (14) in which a ball element (15) having a main communication passageway (17) passing through the ball element itself is rotatably received. The ball element is rotatable between an angular position at which the valve is completely closed, said passageway being disposed substantially transverse to the inlet and outlet, and an angular position at which the valve is completely open...