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Патент USA US2409856

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Oct. 22, 1946.
c. H1LL.YER, JR., ,ET AL
2,409,855
GASEOUS DISCHARGE TUBE
Original Filed Sept. 7, 1940
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INVENTORS
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2,400,855
Patented Oct. 22, 1946
UNITED ‘STATES PATENT OFFICE
2,409,855
GAsEoUs DISCHARGE TUBE
Curtis Hiuyer, Jr., and Henry Blackstone, nach;
mond Hill, N. Y.
Original application September 7, 1940, Serial No.`
Divided and this application March 6,
1941, Serial No. 381,951
355,708.
12 Claims.
(Cl. Z50-27.5)
l
This invention relates to an electron discharge
device and more particularlyto a gaseous dis
charge tetrode of the “thyratron” type.
This application is a division ot our applica
tion Serial No. 355,708, ñled September 7, 1940,
entitled “Projectile”
Different types of apparatus depend for con
2
headers are welded in place within cylinder I,
support 4 is securely held in proper position. If
desired, the support may be welded to cylinder I.
The inside of support section` 5 is provided
with a shoulder 8, on which is seated a perfo
rated disc-like shield grid 9. Grid SI is `held in
place on shoulder B by an annular ceramic bush
ing I0, the upper portion of which has a rabbet
II. Another ceramic bushing I2 is also provided
electron discharge devices of the character here
with a rabbet I3, which, with rabbet II, forms
10
under consideration. For purposes of brevity,
an annular slot in which a perforated disc-like
devices of this >character are hereinafter referred
control grid I4 is seated, and accordingly in
to as tubes. These tubes are inherently delicate
sulated from screen grid 9 and support section 5.
or frangible, and accordingly unable to with
A second perforated disc-shaped screen grid I5
stand substantial shocks or continued excessive
rests on top of ceramic bushing I2, and includes
15
Vibration. As often as not their heater iilaments,
an upwardly extending flange I5a which fits
control and screen grids are formed of fine
within support section 5, and may be electrically
coil
form,
which
readily
be
` wire, quite often in
and mechanically connected thereto as by weld
comes displaced if the tube is roughly handled,
ing, if desired. It may be seen that grids 9, I4
while other parts of the tubes tend to bend,
and I5 are spaced from one another by ceramic
crumble or break. It is accordingly among the 20 bushings I0 and I2, grid I4 being insulated from
objects of this invention to provide aV tube of
grids 9 and I5 and from support 4 by bushings
the above character which is able to function
I0 and I2.
efliciently and over an extended period of time
Still another ceramic bushing I6 is disposed
under conditions of substantial shock or exces
within
support section 5, and includes a down
sive continued vibration. Other objects will be 25 wardly extending reduced portion Ilia, which fits
in part apparent and in part pointed out here
within flange I5a of grid I5. Bushing I6 also
inafter.
has an interior annular rabbet IGI), which pro
The invention accordingly consists in the fea
vides a shoulder on which an anode plate I1 is
tures of construction, combinations of elements, 30 clamped by a generally conical shaped ceramic
and arrangements ofl parts as will be exempliiied
cap I8. The top of lceramic cap I8 has a small
in the structure to be hereinafter described, and
depression lßa formed therein into which a pro
the scope of the application of which will be
jection I9, formed in the bottom 2o of header
indicated in the following claims.
2V extends. Thus, when the several ceramic pieces
In the drawing, wherein there is shown one
35 are assembled within support 4, and header 2 is
trol thereof upon circuits including one or more
of the various possible embodiments of our in
vention, the single ligure is a sectional elevation
installed in the top of cylinder I, projection I9
not only locates ceramic cap I3 in proper position,
but securely holds it therein against transverse
With reference to the drawing, we have gen
and axial displacement, together with the bush
erally indicated at I a rigid elongated cylinder
therebelow.
fabricated from any malleable, inexpensive metal 40 ings
Header bottom 2a is provided with an opening
such as iron, nickel or the like, the top and bot
which may conveniently be sealed by an insulat
tom of which are closed, respectively, by metallic
ing seal 20 of glass or the like, through which a
header members 2 and 3. Headers 2 and 3 may
conductor 2l extends. Conductor 2| also extends
conveniently take the form of reentrant cylin
through ceramic cap I8 and is connected to
45
drical members fitting snugly within the interior
anode I1. Another conductor 22 is disposed
of cylinder I to which they may be secured in
within cylinder I and is electrically connected to
any suitable manner as by welding.
grid I4. It may be seen that conductor 22 is
Securely clamped between headers 2 and 3
electrostatically isolated from anode conductor
within cylinderI is an elongated generally cylin
by support 4 and cylinder I.
drical metallic support, generally indicated at 4, 50 2l As
noted hereinabove, support 4 includes a
preferably comprising a tubular intermediate
lower,
outwardly flared section 1, and grid con
section 5, an upper flared section Ii, and a lower
duotor 22 extends by way of an insulator 22a
ñared section 'I. The top of Support 4 abuts the
through this section and through a seal 23
bottom of header 2, while the bottom of the sup
mounted
in the bottom 3a of header 3. From
55
port abuts the top of header 3. Hence, when the
of our tube.
2,409,855
3
4
the above, it may now be seen that inasmuch as
the several grids 9, I4 and l5, and anode Il, are
Vdisc-shaped and are supported at their periph
eries, and inasmuch as their supporting structure
is formed of coaxial elements, a unitary struc
ture is vprovided which is well able to withstand
v
substantial axial stresses as well as transverse
stresses resulting from forces imparted axially
and transversely of the tube. As these several
ing said cylinder and respectively said headers, a
plurality of insulating members supported by
said supporting member, anode and grid ele
ments supported by said insulating members in
spaced relation, and an elongated cathode sup
portedl by one of `said headers and» extending
therefrom into said supporting member toward
said elements.
2. An electric discharge device comprising, in
parts are securely held in proper spaced relation 10
combination, a hollow metal cylinder closed at
ship, continued shocks or excessive vibration can
both ends by headers hermetically sealed thereto,
have. no effect in displacing them relative to one
an elongated metal cylindrical supporting mem
another. Furthermore, inasmuch as the upper
ber disposed within said cylinder, a plurality of
portion of ceramic cap I8 is generally conical in
shape, and is accurately located with respectv to 15 insulating members supported by said supporting
member, anode and grid elements supported by
header 2, assembly of the parts is greatly expe
saidA insulating >members in spaced relationship,
dited and lateral displacement thereof, which
might otherwise occur from shock or vibration,
'
and a cathode secured to one of said headers and
extending into said supporting member toward
said elements.
Still further, as the side walls of support ‘i 20
3. An electric discharge device comprising, in
diverge laterally at the upper and lower ends
combination, a hollow metal cylinder closed at
thereof so as to form substantially frusto-conical
both ends by headers hermetically sealed thereto,
portions terminating in enlarged cylindrical por
an elongated supporting member disposed within
tions, the support walls are well able to absorb all
stresses imparted thereto from the inertia of the ' said cylinder and coaxial therewith, anode and
grid elements supported by said supporting mem.
grids and their ceramic bushings.
ber in spaced insulting relationship, and a cath
Top 3a of header 3 also has mounted therein
is substantially precluded.
insulating seals 24 and 25, and also has mounted
thereon a post 26 which may be formed of glass
ode secured to one of said headers and disposed
within said supporting member.
4. An electric discharge device comprising, in
or other suitable insulating material, and which
extends upwardly and preferably coaXially of the 30 combination, a hollow metal cylinder closed at
tube.- A support 2l is mounted in the upper end
of post 26 and has a groove 27a formed in the top
thereof. A filament
wire or cathode 28 is sup- _
ported in groove 21a so `that the ends of the ñla
ment hang -down from the groove and are con
both ends by headers hermetically sealed thereto,
a cylindrical supporting member secured within
said cylinder, anode and grid elements supported
by said supporting member, and a cathode sup
ported by one of said headers and extending to
ward said elements.
5. An electric discharge device comprising, in
combination, a hollow metal cylinder closed at
nected respectively to spring wires 29 and 3U, of
desirable thickness and length, these spring wires
in turn being respectively connected to conduc
tors 3| and 32 which extend through 'insulating 40 both ends by headers hermetically sealed thereto,
a cylindrical supporting member secured within
seals 25 and 24. Thus post 25, filament support
27, filament wire 28 and control grid wire 22 all
said cylinder, anode and grid elements supported
extend, or rather are disposed in substantially
parallel relationship to the axis of the tube, in
which. position they are best able to withstand
the stresses resulting from forces impressed on
the tube axially thereof. The stresses imparted
to ñlament support 21 are largely compressional,
whereas those, imparted to filament >wire 28 are
tensional. .It should. also be noted that spring
wires 2S and 3d hold the filament wire taut during ,
assembly, and also accommodate such expansion
as may occur in the filament upon heating
thereof, with the result that the ñlament is con
stantly maintained
condition.
.
in
a
substantially
taut l
Y
It will now appear that we have provided a tube
of the character under consideration which is
well able to withstand shocks and vibration With
by said supporting member, and a cathode sup
ported by one of said headers and extending to
ward but spaced from said elements.
6. An electric discharge device comprising, in
combination, a hollow cylinder closed at ,both
ends, a supporting member within said cylinder,
an anode peripherally supported by said support
ing member, a plurality of disc-likegrids periph
erally supported by said supporting member and
spaced from one another and from said anode,
and an elongated cathode mounted within- said
cylinder and extending toward said grids.
7. An electric discharge device comprising,rin
combination, a hollow cylinder closed at both
ends by headers hermetically sealed theretdan
elongated support mounted within said cylinder
and coaxial thereto, a circular anode peripherally
out any impairment of its operating eiiiciency.
60 supported by said support, a disc-like perforated
As many possible embodiments may be made
grid peripherally supported by said support, a
of theA above invention and as many changes
filament support mounted on one of said headers
might _be made in the> embodiment above set
and extending therefrom toward said grid, and
forth, it is to be understood that all matter here
a cathode filament mounted on said filament
inbefore set forth or shown in the accompanying 65 support.
drawing is to be interpreted as illustrative and
8. An electric discharge device comprising, in
not in a limiting sense.
,
»
combination, a hollow metal cylinder closedat
both ends by headers hermetically sealed thereto,
1. An electric discharge device comprising, in
combination, an elongated hollow metal cylinder 70 a hollow metal cylindrical support disposed
within said cylinder and having a flared end en
closed at both ends by metal headers hermetically
gaging one of said headers, a disc-like anode
sealed thereto, a metallic >supporting member
mounted in said support, a plurality of disc-like
Within said cylinder, said supporting member‘in
grids mounted in said support, means associated
_cluding a middle elongated cylindrical section
and ilared end sections, said end sections engag 75 with said support for insulating said grids from
lsaid anode, and a cathode iilamentv supported by
We claim :_v
2,409,855
5
6
Y
said last-mentioned header and disposed within
said cylinder coaxially therewith, said support
said support,
ing member being substantially narrower along
Y
9. An electric discharge device comprising, in
combination, a cylinder closed at both ends by
headers hermetically sealed thereto, anode and
grid elements in said cylinder, supporting means
in said cylinder for supporting said elements in
said cylinder against forces exerted on said cylin
its central portion than at its ends, anode and
grid elements supported by said supporting mem
ber in said narrower portion in spaced insulated
relationship, and a cathode secured to one of
said headers and disposed within said support
ing member .
der axially or transversely thereof, a ñlament in
12. In an electric discharge device comprising,
said cylinder, and means in said cylinder for sup 10 in combination, a cylinder closed at both ends by
porting said ñlament against shocks exerted on
said cylinder coaxially thereof.
10. An electric discharge device comprising, in
combination, a cylinder closed at both ends by
headers hernietically sealed thereto, a shock re
headers hermetically sealed thereto, anode and
grid elements in said cylinder, supporting means
in said cylinder for supporting said elements in
said cylinder against forces exerted on said cyl
inder axially or transversely thereof, a glass post
sistant support disposed within said cylinder be
tween said headers, disc-like anode and grid ele
ments carried by said support in spaced relation,
secured to one of said headers within said cyl
inder, a metal post mounted in said glass post
and extending therefrom, the free end of said
metal post being bifurcated, ñlament wire looped
means for insulating said elements from one an
other, a cathode filament in said cylinder, and a 20 over said bifurcated end, a pair of conductors
extending through said header, and resilient con
shock resistant support carried by one of said
nectors connecting the ends of said ñlament re
headers for supporting said ñlament.
11. An electric discharge device comprising, in
spectively to said conductors.
combination, a hollow metal cylinder closed at
both ends by headers hermetically sealed thereto, 25
an elongated supporting member disposed within
CURTIS HILLYER, JR,
HENRY BLACKSTONE.
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