Browse Prior Art Database

Proposed Change in the Beam-X Tube

IP.com Disclosure Number: IPCOM000096980D
Original Publication Date: 1962-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Haims, MJ: AUTHOR

Abstract

A multipurpose BEAM-X switch tube (upper drawing) comprises a cathode 10, a plurality of target electrodes 12, spade electrodes 14 and 16, switching grids 18 and 20, and shields 22. The latter are commonly connected to terminal 24. Cathode 10 is actually elongated and centrally located within the tube. The other electrodes are concentrically arranged to define a plurality of compartments for receiving the beam. Each compartment comprises a beam receiving target electrode 12, positioned to receive the beam as it passes between adjacent spade electrodes 14 and 16, switching grids 18 and 20 and shield grid 22. The spade electrodes serve to direct the beam to target electrode 12 by means of both the electric field and a magnetic field having flux lines parallel with cathode 10.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 72% of the total text.

Page 1 of 2

Proposed Change in the Beam-X Tube

A multipurpose BEAM-X switch tube (upper drawing) comprises a cathode 10, a plurality of target electrodes 12, spade electrodes 14 and 16, switching grids 18 and 20, and shields 22. The latter are commonly connected to terminal
24. Cathode 10 is actually elongated and centrally located within the tube. The other electrodes are concentrically arranged to define a plurality of compartments for receiving the beam. Each compartment comprises a beam receiving target electrode 12, positioned to receive the beam as it passes between adjacent spade electrodes 14 and 16, switching grids 18 and 20 and shield grid 22. The spade electrodes serve to direct the beam to target electrode 12 by means of both the electric field and a magnetic field having flux lines parallel with cathode
10.

Initially, the voltages of all spade electrodes 14 and 16 are equal and are held more positive than the cathode. With no beam formed in the tube, all of the electrons coming from the cathode remain in the vicinity of the cathode. One spade electrode is driven negative with respect to the cathode to draw current. It is held negative to establish a beam from the cathode to the particular spade and to the associated target electrode. Once a beam is established, the target picks up most of the current. By applying a negative potential to the grids 18 and 20, the beam is sequentially switched from compartment to compartment around the tube.

A proposed change in th...