A pressure source to develop a stream of liquid under pressure as a consequence of the rise and fall of the surface of a body of water. The pressurizing means comprises an enclosure which bounds a chamber having a pair of portions at least one of which is movable relative to the other as a consequence of a force applied to one of them to reduce the volume of a chamber and thereby to place under pressure liquid which is contained therein. A conduit leads from the chamber through which a stream of...

An improved neutron monitoring and startup source for a thermal nuclear reactor including a fast neutron emitting material encapsulated within a cladding substantially black to thermal neutrons. In another embodiment the inventive source, or any source, is advantageously affixed to movable control elements so as to reside out of the reactor core for periods of high neutron flux.

A source of a tubular beam of ions comprising a cylindrical shell with one butt end having an axial hole in it and the other butt end solid. It is provided with a rod having one end fixed to the solid butt end of the cylindrical shell and arranged coaxially to the latter. The free end of the rod carries a disc placed in the axial hole of the butt end of the cylindrical shell so as to obtain a circular gap confined by the side wall of the hole. A hollow annular shell is arranged coaxially within ...

A waveform generator in which the primary of a transformer includes a nonlinear network so that when a sinusoidal source is connected, there is a notch in the voltage waveform at the primary winding, the notch having a complex function. The same notch appears at the secondary winding and is fed through a further network to three floating terminals at relatively different direct current levels for use with oscilloscopes for testing and instructing.

A microwave source including a dual bandwidth phase lock loop and a circuit for developing a modulation cancelling signal for insertion into the loop to cancel any error signal modulation components. In the preferred embodiment the same modulating signal used to modulate the oscillator is shifted in phase by 90.degree. and added to the output of the phase detector. Since the cancelling signal is then 180.degree. out-of-phase with the error signal modulation component, complete cancellation is ac...

An electrically conductive, high-transmission membrane is supported between an ionization region and an exit region for positive ions in an ion source. The membrane is operated at a potential more negative than the source of ionizing electrons to repel primary and secondary electrons exiting from the ion source while transmitting the desired positive ions.

A radiation source for use in an arming system for airborne weapons comprng a stainless steel sphere filled with krypton-85 (Kr.sup.85) radioactive gas at high pressure and having gold plated internal surfaces to form Bremsstrahlung targets which continuously emit gamma radiation when subjected to the beta radiation from the Kr.sup.85. A depleted uranium (U.sup.238) or tungsten shield surrounds the steel sphere and means are provided for pivoting part of the shield away from the steel sphere to ...

An ion source having an anode between two cathodes and means for producing an axial magnetic field. Detremental heating of the cathode present opposite to the ion exit aperture by particles which are accelerated in the reverse direction and have a charge which is opposite to that of the extracted ion beam is prevented. For that purpose said cathode and the means for producing an axial magnetic field have an axial aperture. A collector electrode is present for capturing the relevant particles. Th...

An MOS field-effect transistor having its gate electrode connected to its drain electrode can be used to operate as a constant current device by means of a resistive network placed between its source and substrate electrodes.

A light source particularly adapted to provide emergency lighting and having an extremely long standby life is disclosed. The light source comprises a compartmentalized plastic tube having a light bulb in one compartment, a pair of electrodes in another compartment and an electrolyte in a third compartment. The electrolyte compartment houses an electrolyte which is stored in a frangible envelope. The plastic material which forms the first two compartments is stiff or rigid; while the plastic mat...