SU62084A1 - Electron beam switch - Google Patents

Description

The subject matter of the invention is an electron beam switch consisting of an electronic searchlight, an electrical or magnetic deflection system, and contact lamellae.

A disadvantage of the known electron beam switches is the small amount of switched current and the lack of self-blocking, which necessitates the use of an intermediate gain.

According to the invention, for the enhancement of current and self-blocking of switched circuits, it is proposed to use the well-known field emission phenomenon observed upon irradiation by an electron beam of thin dielectric filaments deposited on the metal lamellae of the switch.

In this case, the electron field current from the dielectric surface results in a significantly larger pesvic current (the gain reaches 1000) and does not stop, after the beam is turned off, but remains for several hours and. When voltage is removed from the collector, the autoelectronic emission is sustained.

Self-blocking electronic switch can be executed

in the form of a cathode ray tube containing, among others, elements common for this device (electronic searchlight and deflecting system), a series of electrodes (lamellae) located in a plane perpendicular to the axis of the electron beam, and a collector electrode, which can simultaneously is the anode of the tube, as is the case with the proposed secondary emission electronic switch. Switch lamellas consist of a metal coated with a thin dielectric layer, i.e., are autoelectronic emitters.

When a sigil is applied, the electron beam deflected by an electric or magnetic field, falling on a certain lamella, causes an autoelectronic current from its surface.

Since the autoelectron current does not stop after the beam is switched on, since the moment this current occurs, the emitter-collector circuit is self-blocking.

The autoelectronic current in the proposed electron beam switch can reach values that are sufficient to trigger a sensitive electromagnetic relay turned on and the lamella circuit, and the presence of self-blocking of this current should ensure that the relay operates even with very short signals. The latter circumstance is especially important in the case of using a switch in an electronic selector circuit with phase-impulse control.

The termination of the autoelectron current after the relay is triggered can be made by automatically opening the emitter-collector circuit, just as it is done to stop the current in the anode circuit of the thyratron. It is also possible to supply the emitter-collector by alternating voltage. In this case, the autoelectronic current is absent during the negative half-period.

.Great primary current gain achieved using autoelectric

emissions, and self-blocking of the electronic switch make it possible to directly activate the relays in the lamella circuit and eliminate the need for intermediate gain changes. This is the advantage of the proposed device in comparison with the judgments.

The above principle can also be used to construct other self-blocking electronic devices, for example, a phototidron type, in which the field current is excited by a photocurrent.

Subject invention

The electron beam switch, consisting of an electronic spotlight, an electrical or magnetic deflecting system, and contact lamellas, is also distinguished by the fact that, in order to increase the current and self-blocking of the switched circuits, the switch slats are covered with a thin film of such a dielectric, which, being applied to metal and is exposed to electron beam irradiation, has the ability of electron emission.