A power supply for providing two different DC voltages from a transformer having a center tapped secondary winding is disclosed. An arrangement of diodes and capacitators forming a voltage doubler is connected to the secondary winding to provide a low DC voltage from the center tap approximately equal to one half of the RMS voltage across the secondary winding, and a higher DC voltage greater than twice the RMS value of the AC voltage across the secondary winding of the transformer.

In a venturi type fuel supply apparatus wherein a resistance member biased by a spring against a negative suction pressure is provided in an air suction passage to engage a throat formed therein and a needle valve is moved by the resistance member, a unitary structure for metering and ejecting fuel is disposed at the center of the air suction passage. The unitary structure comprises an outer and inner nozzles defining therebetween an air-fuel passage leading to fuel ejection ports. The lower end...

A linear DC power supply provides high efficiency with substantially lower total capacitance than prior art linear DC power supplies. The power supply includes first and second input terminals, first and second output terminals, a center tap transformer, first and second capacitors, first and second charging circuits, and first and second discharging circuits. The center tap transformer has a primary connected to the first and second input terminals and has a secondary with first and second phas...

A supply device for liquid analysis apparatus including a probe and a sample container, said probe and said container being relatively movable with respect to each other whereby liquid carried within the container may be removed by said probe when the probe is disposed within the container, said probe including a takeoff conduit with a valve disposed therein, rinse fluid supplied to said conduit through said valve, said valve preventing rinse fluid from entering said conduit when the sample is m...

A D.C. supply circuit for a television receiver which has a load circuit including at least one controllable semiconductor switch, the supply circuit comprising means for rectifying an alternating mains supply, a smoothing circuit connected between the rectifying means and load circuit and delay means for delaying the application of the full rectified and smoothed voltage to the load circuit when the receiver is initially turned on, wherein the delay means include means for inhibiting a certain ...

The present power supply has two step-up transformers with their respective primary and secondary windings series-connected. A half-wave rectifier tube and a filter are connected to the transformer secondary windings to rectify the current induced in them and to smooth out fluctuations in that current. One or more additional step-down transformers are provided, each having a primary winding that may be switched in series with the first-mentioned primary windings or disconnected from them and a s...

A device for converting high level voltage to relatively low level DC voltage for the driving of a plurality of loads. The device utilizes a relatively small transformer with a gapped core and a single transistor to regulate the high frequency power transformer process. Controlled release of magnetic energy induced in the core prevents magnetic saturation of the core.

A redundant power supply for a body organ stimulating device having at least two parallel branches. Circuit means are provided which are operatively connected to the output terminals of the power supply and to each parallel branch thereof and are responsive to the voltage across the output terminals of the power supply falling to a predetermined value for automatically serially interconnecting the power sources of the power supply.

A novel high voltage power supply is disclosed which generates an unregulated output voltage from a dc input voltage. The magnitude of the unregulated output voltage may exceed the magnitude of the applied dc voltage. This output voltage appears across a capacitor which is in series with an inductor and a switch. The dc voltage is applied across the inductor and switch, and the switch is periodically closed by an oscillator. While the switch is closed, the voltage across the capacitor increases ...

The specification discloses the combination of a bottle and a connecting cap therefor, both components having mating screw threads, the components having a mating key and keyway system extending axially of the bottle neck and being designed so that mating of the key and keyway system is necessary before relative rotation between the cap and the bottle to screw the cap onto the bottle is possible. Thus, a connecting cap can only be secured to a bottle if the bottle and cap are complementary and t...