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Патент USA US2126288

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Aug. 9, 1938.
K. SCHLESINGER
ELECTRONIC TUBE
2,125,233
-
"
Original Filed June 15, 1934
June/rial‘:
Patented Aug. 9, 1938
‘2,126,288
UNITED STATES PATENT OFFICE
2,126,288
ELECTRONIC TUBE
Kurt Schlesinger, Berlin, Germany, assignor to
Radioaktiengesellschaft D. S. Loewe, Berlin
Steglitz, Germany
Original application June 15, 1934, Serial No.
730,714. Divided and this application Decem
her 5, 1935, Serial No. 52,956. In Germany
June 17, 1933
2 Claims. (01. 250--27.5)
The object of the invention is an electronic
tube, more particularly for rectifying and poten
tial-amplifying purposes.
According to the invention, the electronic cur
5 rent produced by a hot cathode, preferably an
indirectly heated equipotential cathode, is con
trolled on the one hand in the manner known per
se by space charge control, and at the same time,
additionally thereto, likewise in the manner
10 known per se, by de?ection (selection) control.
According to the invention there are provided
means for controlling the anode current simul
taneously by space charge control and by de?ec
tion control.
15
'
.
It is also possible, in accordance with the in
vention, to provide in an electronic tube of this
character additional grids, such as space charge,
screening and interception grids.
A form of embodiment of the tube according
20 to the invention is illustrated diagrammatically
by way~of example in the drawing.
-
In the drawing, l is the cathode, ll are the
preferably negatively‘biassed control plates, 6 the
screening grid plates, 1 is the anode and ill the
25 wall of the tube.
3 and II are additional grids.
'The elements it cause simultaneously a control
of ' the emission and also a de?ection of the
emitted electrons. If the elements ll are provided
with a strong negative bias, the emitted electrons
30 will be bunched together at the centre and in
tercepted by the elements 6, so that no electrons
‘ impinge against the anode. If on the other hand
the control potential is‘ shifted into positive the
electrons are able to pass between the elements 4
35 and the elements 3 and meet against the anode l.
The arrangement and embodiment of the ele
ments 4 and 6 and also the biassing of these ele
ments should be suitably selected for the partic
ular purpose for which they are intended.
This form of embodiment is particularly suit
able as recti?er.
‘
The invention is in no way limited to the form
of embodiment illustrated, which has been quoted
merely for the purpose of explanation.
The advantage of the arrangement according
to the invention is to be regarded more particu
larly in the fact that the same permits of a very
considerable increase in the steepness and an
adaptation of the characteristic, practically as de
sired, to the particular purpose concerned.
I claim:
10
1. 'An electron-discharge device,‘preferably for
rectifying purposes, comprising an evacuated con
tainer, a cathode, an anode structure, means for 15
controlling the density of the electronic stream
and for de?ecting said electronic stream, said
controlling means consisting of a plurality of
plates radially arranged with respect to said
cathode, and a plurality of further plates ar 20
ranged between the ?rst said plates parallel to
said cathode, the width of each of said further
plates being considerably smaller than the dis
tance between every two adjacent ones of the
?rst said plates.
25
2. An electron discharge device, preferably for
rectifying purposes, comprising an evacuated con
tainer, a cathode, an anode structure, means for
controlling the density of the electronic stream
and for de?ecting said electronic stream, said 30
controlling means consisting of a plurality of
plates radially arranged with respect to said
cathode, and a plurality of further plates ar
ranged between the ?rst said plates parallel to
said cathode, the width of each of said further 35
plates being considerably smaller than the dis
tance between every two adjacent ones of the
?rst said plates, a grid surrounding said cathode.
KURT SCHLESINGER.
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