close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2092095

код для вставки
Sept- 7, 1937-
M. STEENBECK
2,092,095
CONTROL OF ELECTRIC CIRCUITS BY MEANS OF ELECTRON TUBES
Original Filed June 28, 1929
F9. 2
3
O
I i
‘
i
:
2
L- "J
4
l
3 4
"m
_
__>
+
/
“MAMA/WWW
W
Q‘WITNESSES:
WC
_
‘
INVENTOR
Max Sfeenbeck
I
ATTORNEY
Patented Sept. 7, 1937
ATENT CFFEQE
UNITED STATE?
2,092,095
CONTROL OF ELECTRIC CIRCUITS BY
MEANS OF ELECTRON TUBES
Max Steenbeck, Berlin-Siemensstadt, Germany,
assignor to Westinghouse Electric & Manufac
turing Company, a corporation of Pennsyl
Vania
Original application June 28, 1929, Serial No.
374,382. Divided and this application Novem
ber 13, 1934, Serial No. 752,861. In Germany
June 12, 1929
4 Claims.
(Cl. 250—27)
This application is a division of my copending
application Serial Number 374,382, ?led June 28,
1929, Patent 1,987,645, issued January 15, 1935,
for Control of electric circuit by means of elec
tron tubes.
r.
O
My invention relates to improvements in the
control of electric circuits by means of electron
tubes.
For controlling electric circuits gas electron or
vacuum tubes with a grid-like cathode may be
employed. On one side of this cathode is lo
cated an anode and on the other side a control
electrode is located at a considerably shorter dis
tance. The distance between the cathode and
the control electrode behind it is so short that a
discharge between these two electrodes is ren
dered impossible. As long as the control elec
trode is not charged an independent glow dis
charge exists between the anode and the cathode.
20 The discharge process takes place in such a man
ner that due to the bombardment of the posi
tive ions accelerated by the cathode drop the
cathode emits a small number of electrons, which
then continually increase in consequence of ion
25 ization by collision and thus induce the formation
of fresh positive ions. This small electron emis
sion of the cold cathode is absolutely necessary
for the maintenance of a glow discharge.
If it
is prevented the glow discharge is also extin
3 O guished although the cathodic electron emission
amounts only to about 1 per cent of the total
current traversing the tube.
One object of my invention is a process of
controlling electric circuits by means of gas
3 5 ?lled electron tubes with a grid-like cathode and
a control electrode adjacent to it, in which the
control electrode for interrupting the main dis
charge is charged to a potential positive with re
spect to the cathode.
This potential exceeds
4 0 the potential serving for the maintenance of the
main discharge.
A further object of my invention is to develop
the process of controlling electric circuits in such
4
a manner, that for igniting the main discharge
the potential of the control electrode is reduced
to approximately the cathode potential and si
multaneously there is initiated an additional dis
charge between special ignition electrodes.
A still further object of my invention is to
5 0 provide a gas-?lled electron tube functioning as
a recti?er, the main electrode of which acting as
5
cathode during the passage of the current is
electrically connected to the control electrode,
the control electrode as well as the second grid
like electrode being designed as telescoped cups.
For carrying out the process according to my
invention I use, for instance, the Vacuum tubes
illustrated in the drawing affixed hereto‘ and
forming part of my speci?cation.
In the drawing
.)
Figure 1 is a view, partly in cross-section of a
vacuum tube embodying the invention,
Fig. 2 is a view, partly in cross-section of
another tube constructed according to the inven
tion, and partly diagrammatic of the connec~ l0
tions thereto.
Referring to Fig. 1 of the drawing it will be
observed that between the anode or plate I and
the control electrode 3 and close to the latter
there is located the grid-like cathode 2. This 15
arrangement may be employed as a relay, because
it is possible to open and close the much stronger
current between the main anode l and the main
cathode 2 by the comparatively weak current
between the grid cathode Z and the control elec- 20
trode 3. It is thus obvious that a quantitative
control is here possible.
In Fig. 2 of the drawing is illustrated a pear- '
shaped tube or bulb. At the upper end of this
tube is sealed in the leading-in wire for the con- 25
trol electrode 3 and at the lower end, the leading
in wire for the main electrode I. The wires of
the two electrodes, the control electrode 3 and
the main electrode l, are directly connected.
Additional ignition electrodes 4 may be inserted 30
in the tube of either Fig. 1 or 2 for initiating an
additional discharge.
Since the e?ect attainable by my improved
process develops at the cathode only and not at
the anode, it is possible to connect such a tube 35
as a recti?er, as shown in Fig. 2 of the drawing.
In this case the electrode 2 and the control elec
trode 3 are designed as cups, the electrode 3 be
ing placed into the grid electrode 2. The current
then only passes through this valve in the direc- 40
tion in which the electrode 2 is anode and the
electrode l is cathode.
The process according to my invention thus
serves for controlling electric circuits by means
or" vacuum tubes, the effect of the cathodic elec- 45
tron emission being'neutralized by means of a
strong ?eld produced behind the cathode, that is
between the cathode and the control electrode,
by the control electrode being‘ charged to a posi
tive potential with respect to the cathode, which 50
potential exceeds the potential serving for the
maintenance of the discharge. This ?eld with
draws from the main discharge a large portion
of the cathodically emitted electrons, and these
are» absorbed by the control electrode without 55
2
2,092,095
ionizing on their part. The portion of elec
trons remaining for the main discharge then no
longer su?ices to maintain the main discharge,
this discharge is extinguished, and the stream
of electrons taken up by the control electrode
also ceases.
If it is desired to reignite the discharge, it is
suf?cient to bring the control electrode again to
its normal potential approximately equal to that
10 of the cathode. An additional ignition discharge
between ignition electrodes specially provided for
the purpose may also be provided to increase the
reliability;
v15
.
Various modi?cations and changes may be
made without departing from the spirit and the
scope of the invention, and I desire, therefore,
that only such limitations shall be placed thereon
as are imposed by the prior art.
I claim as my invention:
20
‘1. The process of controlling electric circuits
terrupting the main discharge to a potential
positive with respect to said main electrode and
which exceeds the potential serving for the main- '
tenance of the main dischargereducing the po
tential of the control electrode to- approximately
the potential of the negative main electrode for
igniting the main, discharge, and simultaneously
initiating an additional discharge between spe
cial ignition electrodes.
'
3. The process of controlling electric circuits
by means of vacuum tubes with a grid-like main 10
electrode and a control electrode adjacent to it,
which consists in charging the control electrode
for interrupting the main discharge to a potential
positive with respect to said main electrode, and
which exceeds the potential serving for the main 15,
tenance of the main discharge.
4. The process of controlling electron circuits
by means of tubes with a grid-like main electrode
and a control electrode adjacent to itrand special
by means of gas electron tubes with a grid-like
ignition electrodes, which consists in charging 2O
main electrode and a control electrode adjacent
the control electrode for interrupting the main
to it, which consists in charging the control elec
discharge to a potential positive with respect to
trode for interrupting the main discharge to a
said main electrode and which exceeds the po
25 potential positive with respect to said main elec
serving for the maintenance of the main 25
trode and which exceeds the potential serving for tential
discharge, reducing the potential of the control
the maintenance of the main discharge.
2. The process of controlling electric circuits
by means of gas electron tubes with a grid-like
30 main electrode and a control electrode adjacent
to it and special ignition electrodes, which con
sists in charging the control electrode for in
electrode to. approximately the potential of the
negative main electrode for igniting the main
discharge, and simultaneously initiating an ad
ditional
discharge
between
special
ignition
electrodes.
'
MAX STEENBECK.
Документ
Категория
Без категории
Просмотров
0
Размер файла
268 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа