Method and apparatus for compensating for instability of a strea

Details Method and apparatus for compensating for instability of a strea Method and apparatus for compensating for instability of a strea

1977-12-09

1980-09-16

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

250396R, 250398, 346 75, G01D 1518

Patent

active

042233186

ABSTRACT:
An electrostatic lens is disposed between a charge electrode and deflection plates to electrostatically focus each of the droplets on a recording surface at a position in alignment with the nozzle supplying the stream. The lens preferably comprises three electrodes with each of the outer electrodes having the same potential, which is substantially equal to the kinetic energy per unit charge of each of the charged droplets and of opposite polarity to the charge on the droplets, and the third electrode preferably being grounded. Each of the electrodes has a circular aperture through which the charged droplets pass with the electrodes being spaced from each other in the direction of the stream a distance preferably no greater than the diameter of the aperture. If desired, the electrode, which is furthest from the nozzle, can be omitted although this will produce some deceleration of the droplets.

REFERENCES:
patent: 2533790 (1950-12-01), Grivet
patent: 2600129 (1952-06-01), Richards
patent: 2869510 (1959-01-01), Renner
patent: 3278940 (1966-10-01), Ascoli
patent: 3500436 (1970-03-01), Nordin
patent: 3579245 (1971-05-01), Berry
patent: 3877036 (1975-04-01), Loeffler
patent: 3938163 (1976-02-01), Fujimoto
Grivet, P., Electron Optics, Pergamon Press Ltd., 1965, FIG. 1 and pp. 48-60.
Harting et al., Electrostatic Lenses, Elsevier Scientific Publishing Co., 1976, pp. 1-3, 6-8, 82 and 175.

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