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O¢t. 22, 1946.
‘ `H. J. BAILEY
ELECTRON DISCHARGE DEVICE
Filed April> 8, 1942
2,409,667
Patented Oct. 22, 1946
2,409,667
UNITED
`
STATES
`
2,409,667
PATENT , OFFICE ` `
ELECTRON' DIS CHARGE’ DEVICE
HamptonÍ .1. Dailey, Bloomfield, N. J., assigner to
Westinghouselileçtric Corporation, East Pitts#
burgh, Pa.,V a corporation of Pennsylvania
` Application April 8, 1942, Serial No. 438,141
6 Claims.
`
(o1. 25o-27.5)
"
2
In the specific embodiment df the `invention i1
lustrated` in saidldrawing, the reference numeral
This invention relates to electron discharge de_-`
vices, and more particularly to appurtenances
il) designates an electron discharge device ingen.
eral, the one chosen for exempliiication hereinïbeè,`
thereto for prolonging the useful life thereof.
In various electron discharge devices or tubes,
especially those employing or developing high
power, considerable strain is developed through
heat and otherwise which ultimatelyresults in the
tube becoming defective or otherwise undesirable
ing specifically a transmitting‘tube. . Said device’`
or tube, Which,»of cou-rse, utilizes the usual-triode
electrodes, is shown as having one of those elec.
trodes, namely, metallic> anode H, also` constitut
or not usable. The prevailing use of anodes and
other' electrodes as parts of the envelopes, sealed
to the glass portions _of such-envelopes, renders
the need for corrective means vmore. imperative.
Either a high temperature gra-dient or a_ high
electro-static iield> gradient atv the seal between
themetal and the glass of‘duplex envelopessuch
asmentioned, is an adverse gradient and-a .di-rect
l. 0
ing a part `of the envelope.' Said electrode isa
generally cylindrical structure with a closed outer
end and vvith its inner end shown featheredged at
i2 for ¿obtaining `a yieldable junction with the
marginal
lindrical but
endof-of.
glass.
portion 13„vvîhich
i is likewise
i
¿
Al
Around the cylindrical electrode, such as anode
Il shown, is applied'my improved heat-exchange
cause of failure of the devices. In tubes utilizing
er cooling means I4 which is preferablyY consti
or developing high power, the anode. beGQ'mes
very ho-tand its situation -at tlîleexterior- of theV
tube is desirable V'for dissipation of _heat notwith
standingY the resultant comlfllication` 0f ytempera--`
tuted by a plurality of metallic heat conductive
ñns I5 radiating ¿from a heat conductive metallic
l inner collar surrounded by a metallic heat con
perature change are both adverse gradients.
The present invention is directed primarily to
ductive outer cellar `l 9. More speciñcally, the `fins
l5 are preferably plates, each having the opposite
vertical margins lli, ll thereof bentY laterally .in
opposite `directions `forming aleshape` in cross
section. One of those‘bent margins <.is `Wider than
and has for an object provision of an adequate,
the other,` the more narrowrone .H5 beingireferredV
practical and readily assembled and applied
to as the inner flangev and the other margin ‘ I7
ture gradient between-it` andthe glass.A High
difference oftemperature-and high rate of tcm
means for aiding in reduction ofdetrimcntal gra.F
of Wider dimension being referred to as the outer
dients affecting `the seal. '
flange. The ñns are arranged in, an annular se
‘ i
A further object is to promote economy ‘of 30 quencefvvith the longitudinal edge of the 4‘inner
margin or flange l5 of one fin bearing againstthe
fabrication in effecting attachment of the adverse
body surface of‘the finnext‘beyond and thelon
gradient reducing> means tothe electrode.
gitudinal edge of the outer flange I1 bearing
Another object of the invention is to `provide a
against `the body‘surface of the iin next behind
heat exchange or coolin means which will ob.
35 in the sequence. The ñange dimensions aroma-de
tain air circulation for the purpose.
such that the ling will be symmetrically~ disposed
.A further object of the invention is to 4provide
about the inner collar I8 when juxtaposed to each
parts which `establish spacing fand fposition `of
other as` just described, and the `inner flanges
the parts by juxtaposing'îthe same, as Well as
will atsuch time all be in engagement with said
firmness and ‘non-vibration in use. ’
Yet another object is toovercome electro-static 40 collar which in turn is tightly mounted on .the
outer` surface of the anode l l and soldered theref
gradient at the featheredge seal. of the metal elec
to if so desired.` lt will be observed thatthe suc,-`
trode portion tothe ’glassportion` of the envelope.
cession of flanges constitutes substantially con»
Still furtherfobjects ofthe 'invention will ap
tinuous cylindrical surfaces at the inner andouter
pear to thoseskilled in the art as the description
progresses, both by direct statement thereof and 45 ends ofthe ñns. Around'the .outer cylindrical
by implication from the context.
s
‘
l
`
In the accompanying’rdrawing, wherein‘like
numerals „of . reference Vindicate
similar parts
throughout the several views:
Figure 1 is a sectional elevation of my inven
tion applied to a transmitting tube;
j
Figure 2 is a horizontal sectional View of the
same through the heat exchange means; and
Figure 3 is a perspective view of one of the fine
forming parts of the heat exchange means,
surface formed by the outer flanges islsituated said
outer collar i9, both of said collars I8 and I9
beingpreferably of equal depth as the‘iins and
of appropriate diameter t0 be in physical contact
with the said cylindrical surfaces throughout.
The plane of the plate part of each iin, that is,
the leg of the Z~shaped cross-section, slopes with
respect to a radial plane of the ring intersecting
said leg. Variation of that slope may occur in
55 assembly or in use to accommodate fthe outer
2,409,667
3
4
diameter of the ñn assembly to the inner di
ameter of the outer ring.
’I'he flanges I6, Il of the fins are preferably se
cured, as by silver solder, to the surfaces against
vice having a glass-to-metal substantially cylin
drical junction, _ring-shaped means carried by
said device as part thereof longitudinally dis
placed from and within effective heat-transfer
range of said junction and with the metal and
glass margins next the junction fully exposed
below said ring-shaped means for reducing ad
verse temperature gradient affecting said junc
tion, and fins above said exposed margins next
the junction extending outwardly from said de
vice to said ring-shaped means supporting the
which they abut, whereby the fins are rigidly
secured at their inner ends to the inner collar I8
and hence to the electrode and at their outer ends
to the outer or fin-encircling collarjlS. The
structure is therefore ñrm and will not vibrate,
and gives maximum area for heat conduction
from the electrode to the fins and from the fins
to the outer collar. The mode of fabrication, par
same and transferring heat thereto by conduc
ticularly in attachment of the fins by flanges next
tion.
the inner collar and similar flanges next the outer
2. In combination, an electron discharge de
collar results in a great saving in machine work 15 vice having a glass-to-metal substantially cylin
and with improved product, especially over con
drical junction with margins of the metal and
structions where slots have been milled to receive
glass next said junction exposed outwardly, ring
edges of the ñns. By virtue of the construction
shaped means encircling said device substantially
set forth, the body portions of the successive fins
opposite and within eiïective electro-static range
are spaced from each other and, with pairs of
of said junction for reducing adverse electric
flanges, provide vertical llues 2U open'at tcp and
gradient affecting said junction, and means car
bottom. A positive circulation of air past the en
ried by yan external part of said device at a dis
tire iin surface is accomplished and maximum
tance from said junction supporting said ring~
cooling or heat exchange is effected. Heat trans
shaped means in ñxed position opposite said junc
mitted by conduction to collar IS is dissipated
tion.
from the outer surface; thereof by reason of its
3. A cooling means for an electron discharge
exposure to the atmosphere. vAccordingly the
device having a metallic electrode as an outside
temperature gradient between metallic anode and
part of an envelope, comprising a collar around
glass portions of the envelope is reduced ma
said electrode, a plurality of fins radiating from
terially.
30 said collar and having flanges next the collar
It is likewise desirable to reduce the electric
gradient at the juncture of glass and metal. This
result is accomplished by providing a metallic
sleeve 2| depending from the inside of the anode
forming a continuous surface around and in con
tact with said collar.
4. A cooling means for an electron discharge
device having a metallic electrode as an outside
downwardly past the region of the junction being 35 part of an envelope, comprising a plurality of fins
discussed. This sleeve is within the evacuated
radiating from said electrode, said ñns having
envelope.
flanges at their ends radially outermost, said
lOutside the envelope, directly opposite the
flanges extending from one iin to the next and
junction of anode and glass parts thereof, is a
successively forming a continuous outer cylin
metallic shielding ring 22 suspended by hangers 40 drical surface, and a collar surrounding and in
23vsecured thereto and in turn carried by the
contact with said surface.
heretofore described heat exchange means. As
shown, the hangers are in the form of pins the
upper ends of which enter certain of the nues
5. A cooling means for an electron discharge
device having a metallic electrode as an outside
part of an envelope, comprising a collar in surface
20 of the cooling means next the outer- flange of 45 contact with and surrounding said electrode, a
the adjacent rln, said’ pins being silver soldered
plurality of fins radiating from said collar, said
in place or otherwise secured. ‘
fins having flanges at their inner and outer edges,
By use of the inner sleeve or shield 2| and the
said flanges at the inner edges successively engag
outer shield or ring 22, the electro-static ñeld at
ing next adjacent lìns and forming a continuous
ther junction of glass and metal is made zero or 50 cylindrical surface around said collar, said fins
very low and thus the glass at the junction is
having flanges at their ends radially outermost,
protected from injury which might result other
said flanges extending from one ñn to the next
wise from the electro-static field. The electric
and successively forming a continuous outer cy
gradient and the temperature gradient both being
lindrical surface, and a collar surrounding and
reduced in accordance with my invention the
in contact with said out'er cylindrical surface.
permanence of the seal between the metallic`
6. A cooling means for an electron discharge
electrode and the glass portions of the envelope
device having a metallic electrode as an outside
has been assured.
'
part of an envelope, comprising a collar surround
` Since the various details of construction, as
ing a part of said electrode substantially coaxial
Well as the precise relation and functioning of 60 therewith and spaced outwardly therefrom, and
parts are subject to variation and change without
a plurality of ñns extending from said electrode
departing from the inventive concept or scope of
to said collar, said fins sloping away from radial
Ithe invention, it is intended .that all matteì1 con
planes intersecting said ñns, each iin having
tained in the specification or illustrated in the
flanges at the inner and outer edges thereof with
drawing, shall be interpreted as exemplary and
the flange at the inner edge on the opposite side
not in a limiting sense.
of the ñn from the flange at the outer edge
I claim:
whereby said ñn is Z-shape in cross section.
1. In combination, an electron .discharge `de
'
HAMPTON J. DAILEY.
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