close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2404399

код для вставки
July 23, 1946.
S. B. PICKLES
2, 404,399 }
ADJUSTABLE TRANSMISSION LINE
Filed May 12, 1942
2 Sheets-Sheet l
T2
LNVENTOR
‘ SIDNEY B. Plexus
BY?ZJ/Z 1/4
ATTORNEY
. ‘
July 23, 1946.
s.. B. PICKLES
2,404,399
ADJUSTABLE TRANSMISSION L-INE
FiledMay 12, 1942
2 Sheets-Sheet 2x
\.“\\\\\\\\\\\\\\\\\\\\\ \ \\“\\ \\\mx
\. \.
,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\v A\\
ATTORNEY
‘
Patented July 23, 1946
' 2,404,399
UNITED STATES PATENT JQfFFICEj-VQR
2,404,399
_
p
I ADJUSTABLE ‘TRANSMISSION LINE
Sidney B. Pickles, Jackson Heights, N. Y.,'_assignor l j
to FederalTelephone and Radio Corporation, j'
a corporation of Delaware
‘
- I‘ ‘
I '
-‘
Application May 12, 1942, Serial No. 442,657 ,
16 Claims.
(01. 178-44)
'
'
1
This invention relates to transmission lines and
more particularly to a phasing unit therefor by
which the effective length of an electrical line
tion to shorting the free ends of the segments, a
movable arm may be carried by the rotating
can be varied.
adjacent arcuate segments'at a given distance
from the brushes of the movable conductor
In the type of phasing unit heretofore com
monly used, the lines were telescopingly coupled
and phase adjustment made by trombone action.
This type of phasing unit, however, is objection
member and provided with brushes'to‘short the
‘ means.
The arm may be made adjustable rela
tive to the supporting member so that the short
ing effect’ thereof can be adjusted'for a distance
from the point of conductor engagement with the
able because it is clumsy and awkward to use and
a the adjustment is not smooth. Further, the dif-wlO, segments equal to substantially one-fourth of the
ferences in diameter of the, cooperating telescop
wave length of the current carried by the; elec;
ing parts of this type of unit e?ect discontinuities
trical, lines. This movable short gives an ,open
in the surge‘impedance so that re?ections occur.
effect to the free ends and insures against-the
otherwise free end portions-of the segmentslproe
Bearing in mind the aforementioned disadvan
tages of the trombone type of phasing unit, it is 15 ducing re?ections or in?uencing the phasing ef
an object of this invention to produce a phasing
fect of- the unit. Thus‘, as the, effective lengths unit for electricallines which is'compact, easily
of the electrical lines are changed by manipula~
operated, and in which the operating effect is
@tion'of the rotary member, the movableshort
smooth.
ing arm is moved therewith so as, to short the
‘ '
Another object of they invention is to produces->20 arcuate segments at-rsubstantially - one-.fourth
wave length of the current carried by the‘ lines
and-thereby eliminate any re?ections onphas
‘ing effect that the terminal end portions of the
segments might otherwise impose upon the lines.
may be accomplished by oppositely disposing sta
tionary arcuate segments of conductor material?'25 Thisinvention may be applied to coaxial cables
a phasing unit incorporating electrical line seg
ments of substantially constant surge impedance.
The above and other objects of this invention
one end of each segment having means for-con
nection to an electrical‘ line, and. locating ro
tatable conductor means betweentthe stationary
as well as plural line installations. In the case of
coaxial cables the free end portions of the seg
ments are shorted to the casing or shield- of the
unit in substantially the; same manner asihere_
segments for sliding engagement therebetween,
so that upon rotation of- the conductor means,“30 inbefore described. That is to say, the free; or
terminal ends of the segments are ,conductively
the‘efiective length of the electricalline is varied.
connected to the casing and movable shorting
More particularly, the arcuate segments may
brushes are disposed between the segments and
be disposed ineoppositely opposed pairs about a
given axis and a movable member mounted for
the shield for ‘movement one-fourth of a wave
length beyond the brushes of the movable con
rotation about the given- axis to ,movably?
support conductors extending crosswise between
the oppositely opposed segments. The ‘ends
of the movable conductors'have brushes, each of
which conductively engages one of the arcuate
Thus, by rotationof the‘ supporting» ,
member, the brushes of the movable conductors
segments.
are moved» along ‘the arcuate segments thereby in
creasing or decreasing, as the case may be,- the
lengths of the electrical lines.
1
ductor.
For a better‘understanding of
' v the . invention,
reference may be had tothe following detailed
description to be readin connection withthe
drawings, in which
‘a
v
>
I
segments. Likewise, the'movable‘ conductors are
along line 4--4 of Fig. 1; and
_
,
g
In order to minimize the influence of portions
of the arcuate. segments extending beyond the
points at which the conductor means engage the
segments, the free ends of the arcuate segments
are shorted or grounded to the shield. In addi
=
,
.
,
I
.Fig. 3.15 a cross-sectional-view taken along line
3—3 ofFig.2;
provided with a shield disposed 'in'a like spaced
v
Fig. 2 is a vertical cross-sectional view taken
along line 2-2 of Fig. 1;
-
r
invention, with the top portion thereof removed;
The arcuate segments may be suitably shielded’
by a casing which has a. cylindrical portion: ex
tending adjacent and in spaced relation to the
relation adjacent thereto.
v
Fig. 1 is a plan View of one embodiment of this
'
w
'
.
.~
Fig. 4 is avertical cross-sectional viewtaken
Fig. 5 is a schematic'view. of anotherembodi-l
ment of the invention.
_
1
I
.,
.
.
Referring to Figs. 1, 2, 3 and. 4, of the drawings,
.the embodiment of the invention therein illus
trated comprises a cylindrical casing or shield 10
having top and bottomportions l2 and I4 respec- -
tively. The top portion I! has ‘secured‘thereto'
2,404,399
'3
i
4
conductors 52 and 53, this being in turn connected
a boss 55 and the bottom portion [4 has secured
thereto a boss I8. Supported in the bosses l6
and I8 ‘are stub shafts 20 and 2| respectively, to
'which diametrically-extending arms 22 and 23
are adjustably secured by suitable clamps 24 hav
ing tightening elements 26. These arms 22 and
23 are joined at both ends by cross-straps 6| in
to a third section of line comprising the active
portion of the pair of segments 4| and 43 (i. e.~
the portion shown between brush 56' and cable
49 in Fig. 1). The lengths of the ?rst and third
of these sections (and hence the length of the
composite line formed of all three sections) is
variedrb'y turning handle 60.
tegral therewith-thus forming a generally rec
The unused or free end portions of the arcuate
tangular framev whose purpose is hereinafter ex 10
segments constitute unwantedv stub line sections
plained. An inner shield 30 of ?at rectangular
similar to building-out sections bridged across
form is provided with supporting extensions '32
and 34 integral thereto and extending atTr'ight'i " the above. described composite line at the points
Where the ?rst and third sections join the second
angles as shown in Fig. 3. , The upper supporting
section-l :If these stub= sections were not con
extension 32 is received over‘the_'stubf shaft? 201 ' trolled
they might have such length as to present
and the lower‘ extension 34 is 'received'on the stub. .
low or fairly low impedances to the composite
shaft 2| . The ‘extension 32 is clampedbetween
the arm 22 and a flanged sleeve '35- carried by , line thus; causing large or fairly large re?ect/ions.
For the purpose of preventing the unused or
the shaft 20. The extension 34is likewise clamped ‘7,
‘free ‘end portions of the arcuate segments from
between the arm 23 and a ?anged sleeve 36.
Mounted in spaced relation to the cylindrical 20 acting as substantial impedances shun-ted across.
this line, and thus causing re?ections, the cross
shield l-O are two? pairs of oppositely disposed
traps (6| of arms 22' and 23 are provided with
arcuate conductor segments 40, 4'2 and" 4!; 43.
brushes 62 and 64 (Fig. 3) each of‘which is adapt
As shown i-nv Fig. 1, each arcuate segment» is sup
ed to engage a pair of the arcuate segments‘ of the
ported at one end by a metallic block 44- thereby
grounding that‘ end of the segment‘ to- the shield
I0. At suitably spaced intervals,‘~ each segment
may be further’ supported by insulators '46 to
maintain it’ in properly spaced relation to the
-25 two pairs 40, 42 and'4l, 43,." As shown, the brush
162 engages segments 4| and" 431 while'the brush
64' engages both of the segments '40 and 42 there
by shorting the segments‘; The distance of the
shorting brushes 62 and 64 from the conductive
shield. To avoidaltering the size and cross:
section of thejcond'uctors; the insulators 461are'
secured thereto by screws .41 the flat heads of
engagement of the segments by the conductors
52, 53 maybe changed depending upon- the fre
quency of the current carriedlby the :transmis
V which ,are'solder'ed to the surfaces of vtl'ieconduc
sion line.
tors." Thev end'of each segment oppositethelend
' grounded- telthe shield lil'is suitably connected
'
This adjustment, as hereinbefore sug
gested, may be made by loosening the elements
lead of a cable» 48 or '49 to which'a- trans-* 35 26' and moving the arms 22, 23 to the-desired
to
‘ . vmission‘or; otherelectrical line mayfbe connected.
angula-rrelation/with respect to the fconductors
52, 53. The distance between the brushes 62,64
and the brushes 56, 56’, 5T, 51’ as measured along
The two shields'l'?‘ and? 30 arepreferably made
of the same materialand have substantially the
the segments, is preferably selected as one-fourth
' same thickness.
2'
Mounted on- the inner shield {ill-by insulator‘ 40 of the Wave length of the; frequency of the cur
rent of the transmission line. This. relation, ef
blocks Hand 5!, are two conductors 521 and 53.
fectively renders practically in?nite the. bridged
The conductors; 5'2'a'nd' 53 are of the same‘mat'e
impedances constituted by the unused; or dead
rial-land have the same shape and cross-sectional
area therealong as the arcuatesegments, and ‘are
end portions of the- arcuate segments. '
spaced" the same distance from the‘ shield 39 as’ 45
From the foregoing, it will be readily'apparent
that the effective length of the composite elec
trical line may ‘be readily and easily changed by
the arcuate segments-are spaced from the shield
; Hi. 'The mountings ‘5-8 (Fig. 3;) between the con
- same; as thefinsulated supporting mounts for the
simple manipulation of the handle ,60. For each
' rotary movement of, the. handle, the position of
ments. The endsp'of the conductors52vanq ~53
' arms 22 and 23 will move to’ maintain a shorting
ductors 5-2, 531 and‘ the insulators 594, '5!’ arethe
arcuatesegments (Fig. 2).' The conductors 52 50 the conductors 52, 53 will'b'e changed so that the
' effective length of the line will be varied accord
v andv'ti3v-are straight and extend along the diam
ingly. Simultaneously with this movement‘, the
eter of, the circle which ‘includes the arcuate seg
are provided’ with brushes 5'6; 56' and 51, 51f‘ re
spectively for resilient engagement with the‘arcu
connection between) adjacent arcuate segments
55 at a distance substantially one-fourth‘ wave
length beyond the location of the brushes 56,
‘ate segments, As shown in Figs. 1 and'ZJ'the
brushes-56, 56" ,of'the conductor ‘52 are
en
gagement with the'segments 40 and 4| and the
51 of the movable conductors.
brushes 51 of the'conductor 53 are in engagement
with the segments 42 and 43.
i
V,
'
tors which corresponds ‘to the surgeimpedance
of the arcuate segments with! their" shield ID.
The shaft 20 is provided witha suitable handle
'60- southat the shaft, 20', ‘theassociated shield 30
This uniformity of surge ,impedance‘_ along the
- and the conductors 52,53 may be readily rotated
65
' as desired, the effective length of ‘the composite
transmission line ‘formed by conductors 52'ancl '
V
n
the movable conductors 52, 53 insures the main
tenance of asurge impedance'for these conduc»
I’,
in either directiornrby manipulation of the? han
dle. By turning the handle to‘ the right'or'left
1
The provision of the'inner shield 310' adjacent
53, and the active portions of the arcuate seg-.
’ ments may be lengthenedor. shortened, 'astthe
composite‘ line together with the elimination of
any'substanti-al bridged impedances due to the
unused or free ends results in avoiding ‘re?ections ~
to a greater. degree than any known'type of’ ad-/
justable
length
line.
_
‘
,
'
, -.
For co-axial transmission lines, 'ane'mlbodie
case may be. This composite line maybe con-'
sidered as consisting of a v?rst section of line
comprising the active portion of the-pai-roi‘ seg
ment slightly different fromjtheone hereinbe
fore described may be‘ provided. In this form,
as shown in Fig. 5; only‘ two, single oppositely
"ments 40 and“ "(i."e, ‘the portion shown‘betweenv
opposed arcuate segments ‘Hi and'12"are'neces—
‘cable '48 and brush ‘5B*in;Fig. 1) connected to 1a
second section of line comprising the’ Whole of "
sary; These segments aresuitably- supportedin
spaced relation on a casing ‘H by insulating
72,404,399
o
.6,
.5 \
blocks 13. One end of each segment is con
nected to the innerconductors 14 of two cable
sections while the casing is connected to the
outer portions 15 of the coaxial cable. ‘The other
cuate segments of. conductor material, a shield
disposed adjacent said segments, a rotatable
member, conductor means movable with. said
member and having sliding engagementv with
1 ends of the. segments are shorted by conductive
ii saidsegments, means movable with said mem
‘ connection to the casing by metallic blocks 16. »
‘ber to short said‘segments to said ‘shield at ‘a
‘Any suitable rotary member .11 may be mount
distance from the points of sliding engagement
ed on the casing to movably support a conductor
18. This conductor is provided with brushes 19
for conductive engagement with the two seg-‘
by said conductor means, and said distance
being equal to a portion of" the wavelength of
ments. By turning the rotary-member, the ef
'4. A phasing unit comprising stationary ar
cuate-segments of conductor material, one end
of each segment being‘connectableto an elec-1
*trical line, a shield disposed adjacent said seg
fective length of the composite line intercon
necting the two inner conductors ‘lltmay be
varied.
'
'
v
Y
‘
I
the current carried by. said lines.‘
a
" ,The rotary member 'I‘Lmay also} be provided 15 ments, a rotatable member; conductor'means
with arms 80 and 8| each having brushes 83 and
movable ‘with said» member and having‘ sliding
'84 for sliding engagement with one or the seg
_ engagement‘ with said‘ segments, means to‘ con
ments and the casing respectively. {The location
' ductive'ly connect‘the other ends of‘said segments
of the arms 80, '_8I with respect-to ‘the-conductor
‘to said shield,'means movable withsaid member
18 maybe adjustably determined so that the 20 to short said segments to said shield, means to
shorting effect of the brushes 83, 84 results at a
distance from the brushes ‘[9 equal to substan
tially one-fourth the wavelength of the current
carried by the conductor.
maintain the shorting means at a distance from
the points of the sliding engagement of said
conductor means, and said distance being equal
- to substantially one-fourth of the wavelength of
As described in connection with the ?rst em-‘ 25' the current carried by the electrical lines.
bodiment, a shield 85 having brushes 85 for con
5. A phasing unit comprising stationary arcu
ductive engagement with the casing ‘H is pro
ate segments of conductor material, a shield dis
vided for movement, the spacing of conductor 18
therefrom being the same as the spacing of seg
ments 10,‘ 12 from the casing ‘II. This spacing
may be less than the spacing between inner and
‘ outer conductors of the high frequency coaxial
cables 15 in order to yield the same surge im
posed adjacent said segments, a rotatable mem
' ber, conductor means movable with said mem
ber and havingsliding engagement with said .
- segments, means movable with said member to
short said segments to said shield, and means ‘
for adjusting theangular relation between the
pedance as that of the cables. Alternatively
- shorting means and said conductor means so that
the conductors 10,12 and 78 may be of larger 35 the- distance between the shorting means and
diameter than conductors 14 or may be of ?at
the‘ points of said sliding engagement may. be
cross-section so as to yield with one-sided shield
changed for currents of different frequencies.
ing the same surge impedance as the conductors
6. A phasing unit comprising two pairs of 'sta
14 which are shielded on all sides.
tionary arcuate segments of conductor material
While two embodiments of the invention have 40' in'opposite'ly disposed co-axial relation, means
been shown and described, it will be readily ap
V at one end of each segment to connect the seg
parent to those skilled in the art that many
changes, variations and adaptations thereof are
ment to an electrical line, the other ends of the
adjacent segments of the two pairs being con
possible without departing from the invention. 45: nected together, ‘a rotatable member co-axial
It will be understood, therefore, that the fore
with said segments, and conductors rotatable
going illustration and description is to be re
'with’said member, each of said conductors ex-_
garded as illustrative of the invention only and
tending radially in opposite directions from said
not as a restriction upon the appended claims.‘
member and being so disposed as to provide con
What is claimed is: _
‘
‘
1. A phasing unit comprising stationary arcu
ate segments of conductor material, a shield dis
posed adjacent said segments and forming there
60' duction' between'one segment of ‘each'of said
pairs,
.
.
.
7. A phasing unit comprising two adjacent
pairs of oppositely disposed stationary. arcuate
segments of conductor material, a rotatable mem
ber, conductors movable with said member, each
with a length of line having a predetermined
surge impedance, a rotatable member, conductor
means movable with said member and having 55 conductor being so disposed as to provide con
sliding engagement with said segments, and a
duction between the segments of one of said pairs,
second shield disposed adjacent said conductor
means movable with said member and slidably
means and rotatable with said member said sec
engaging the adjacent ‘segments of the two pairs
ond shield forming with said conductor means
at‘ a distance beyond the points of conduction
a length of line having a surge impedance sub 60 between said conductors and said segments, and
stantially equal to said ?rst mentioned surge ‘ said distance being a predetermined portion of
impedance.
the wavelength of the current carried by the
'
2. A phasing unit comprising stationary ar
segments.
‘
.
cuate segments of conductor material, one end
8. A phasing unit comprising two adjacent
of each segment being connectable to an elec 65 pairs of oppositely disposed stationary arcuate
trical line having a given surge impedance, a
segments of conductor material, a rotatable mem
shieldrdisposed adjacent said segments and form
ing therewith a length of line having substan
ber, conductors movable with said member, each
conductor being so disposed as to provide conduc
tially the same surge impedance‘ as the surge
tion between the segments of one of said pairs,
impedance of said electrical line, a rotatable 70 means for shorting the segments of the adjacent
member, conductor means movable with said
pairs, and means to adjust the location of the
member and having sliding engagement with said
shorting means relative to said conductors.
segments, and means to short the other ends of
9. A phasing unit comprising two adjacent sets >
said segments to said shield.
I
3. A phasing unit comprising stationary ar
of segments each set comprising two oppositely ‘
76 disposed stationary arcuate segments of con
was
é
easing, one end of eacnsegment being conduce
rductor material, a shield disposed adjacent the
tively connected to said casing, a member,means
wto rotatably support said member coaxially of
7 segments of said isetsrone end of each segment
being connectable to an electrical line, the other
ends of the adjacent segments being connected
together, a movable member, conductors movable
with .said member, each conductor :being so dis
posed as to provide conduction between the two
said casing, a conductor carried by said member
and having sliding engagement with said two
segments, and an arm connected :to said mem
‘ ‘her having sliding engagement with said segments
to electrically connect‘ the segments at a distance
vopimsite segments of one of said sets, and a sec
beyond‘the sliding engagement between said con- ,
ductor and said segments-.7
7
ondsnield disposedgadjacent said conductors and
movable with said member,v
~
1,4.‘ A‘ phasing unit, comprising 'a cylindrical
casing, two adjacent sets of segments each set
comprising twov oppositely; disposed arcuate seg
the ?rst-mentioned shield and said'segments, and
ments supported in spaced relation to saidycasing,
V . the'spacing between said second shield and said
1.15 said casing having top and bottom portions, each '
conductors are substantialiythe same. ‘
‘
' 10,. The phasing unit de?ned inclaim' 9 char
aoterized by the'fact that, the spacingbetween '
of. said’ portionsghavingya stub shaft rotatably
mounted therein, the shafts being coaxial, apiece
11,1.v A phasing unit‘comprising two adjacent
sets of segments each set comprising two oppo- “
' of~*sheet_;material supported by-v the stub shafts,
aportion of said piece being disposed in a plane ‘
- segment to connect the segment to an, electrical, 72,0 parallel to, the axis of the stubishafts, conductors,
insulated me'anstjo supportsaid conductors in
line,';a vshield disposed adjacent said segments,
means conductively connecting the other ends ‘spaced relation .to saidsheet material, brushes
‘on the ends of said conductor forsliding engage
of the segments of said sets together, a movable
ment with said segments,_and an arm adjustably
member, conductors movable with said member,
each conductor being so disposedas to provide, 25 supported on one of the shafts and having, slid
ing engagement with adjacent segments of the
conduction between the two opposite segments of
two sets to electrically connect the segments at
one of said sets, and a ‘shield disposed adjacent
sitel-y I disposed stationary arcuate, segments of
' eonductor-inateiial, ‘means at one end ofeach
'
said conductors. '
1
, a distance beyond the sliding, engagement lee
.
tween said conductor and said segments equal to,
12. A phasing unit comprising two adjacent
‘sets of seginentsr each set comprising two oppo-, 30 a predetermined fraction of _ the wavelength of
thercurrent carried by said segments, 1, I
sitely' disposed vstationaryv arcuate segments of
15,.
A
phasing
unit
for
adjustingthe
electrical
conductor, material, means at one end, of each
length of a transmissionrline comprising line sec
segment to connect the segment to a transmis
tion extensions, one end of each section being
sion line, a shield disposed adjacent saidseg
ments, ,means conductively connecting'the other, 35 adapted for connection to part of said line, the
' other ends of said extensions being free, conduc
tive ‘connecting means therefor adjustable along
ends of the segments of said sets together, a mov
able member, conductors movable with said mem
‘ber, each conductor being so disposed as to pro
> the lengths of said extensions, conductive shields
in parallel relation with said extensions and with
vide conduction between the segments of one of a
a said sets, a shield disposed adjacent said con 40 said ‘connecting means and co-operating there
ductors, and means movable with said member
and slidably engaging the adjacent'segments of '
with to constitute lines whose surge impedance
simulatesthe surge impedance of the line being
' adjusted.
‘the two sets at a, distance beyond the points of
conduction between said conductors and said
'16. A phasing unit according to claim 15, ‘in
eluding means under the control of the adjust
, segments‘, and said distance being substantially
equalto one-fourth of the wave-length of the ' able connecting means for preventing the free
ourrenticarried by the segments.’v
,
‘
ends of the line extensions from affecting the im
v
pedance of the transmission line under adjust
; 13. VA, phasing ‘unit comprising a cylindrical
casing, at least two arcuate segments, means to’
support the segments in spaced relation to said“
, ment.
50
'SIDNEY B. PICKLES; .
Документ
Категория
Без категории
Просмотров
0
Размер файла
836 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа