NOV. 19, 1929.
I
‘
A, MATTHIAS
CATHODE RAY OS CILLOGRAPH
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` 1,736,456 n
Nov- 19, 1929.
A. yMATTHIAS'
`
1,736,456
CATHODE RAY OSCILLOGRAPH
Filed ApIl‘il lO, 1928
2 Sheets-Sheet
2
«27663.
Patented Nov.` 19, 1929
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.UNITED STATES~ PATENT,
1,736,456
OFFICE
amm' Harms, 0F BERLIN-WILMERSDOBE _ GERMANY
CATHODE-RAY OSCILLOGRAPE '_ `
Application ?led April 10, 1828, Serial No. 288,994, and in Germany April' 18, 1927.
» My invention is related to cathode ray'os part of which is surrounded by a coil 7 serv
. cillographs for recording transient electrlcal mg to concentrate the cathode rays enter-- v
phenomena.4
~
ing the cathode through the opening 5. Pairs
One object of m . invention is to provide of divertin- plates 8 and 9 are provided5 a cathode ray oscil ograph, in which the ex in the meta tube 6. The diversion of the 55
changing, inserting or removing of the hotc cathode rays is dependent on the alteration
graphic plates or films can be accomp ished in the voltage and on time. ,The base 10 joins
wighout spoiling
the vacuum in the cathode on the metal tube and contains the device for
tu e.
.
recording the alterations in thev electrical 10
Another object of m invention is to gro phenomena indicated by the movement of the ce
vide a cathode ray osci lograph of the a ove stream of the 4cathode rays.
described kind, 1n which the film can be
The base 10 has extensions 11 and 12 on`
moved on continuously, so as. to take a large both sides. At the end of extension 11 is sup
number of photographs, and the exposed ported a drum 13, in which a spool 14 is
15
parts of the film can be extracted without the provided. Two spools 15 andp16 are arran ed 65f
necessity of openin the apparatus.
1n the extension 12 and are driven by an e ec
Other objects an advantages will appear tric motor 18 over a worm caring 17. The
in the followin specification and the novel extensions are provided’witñ narrow slits 19
' features ,of the invention will be particularly and 20 running vparallel to the> front side of l
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the base. These slits‘terminate on the one 70
20 pointed out in the a pended clalms.
My invention is i lustrated in the accom
side in the recording chamber 21 and on the
panying drawings, forming part „of this ap other side lead into the drum 13 or between
plication, in which
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25
the spools 15 and 16. The film 48 to be ex
Fig. 1 is a vertical section through the posed to the cathode ra s is wound on the
cathode ray oscillograph.v v
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spool 14 and conveyed t rough the slits 19 ‘15>
Fig. 2 is a plain view of the base of an and 20 to the spools 15 and 16. These motor
other form containing the recordlng appa
ratus, the cover being' removed.
-
driven spools draw the film oiï spool 14
through the recording chamber 21, in which
Fig. 3 is a schematic diagram of another the film is exposed to the cathode rays. Be
n
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hind the spools 15 and,I 16, the film passes so
Fig. 4 is yet another des1gn of the base.
into
the film box 22 being dprovided 4with a
Fig. 5 is a section on the line A-B in door 56 which can be locke by a spring 55.
Fi . 1.
Between the spools 15v and ,16 and the film
6 is a section on the line C-D in box an externally operated knife 23 is ar~y
30 form of base.
Fig.
35 Fig.; 1.
ranged.
,
i
85
1g. 7 is a section on the line, E-F in , The cathode tube 1 the metal tube 6 and the , `
1.
Ahollow space 21 in the base 10 are highly
1g. 8 is a section on the line G-H in evacuated. -The vacuum is produced and
40
Fig._ 2.
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maintained by the highvacuum pump 41 and
Fig. 9 1s a section on the l1ne I-K 1n .the vacuum pumps 24 and 25. 'I'he narrow 90
Fi . 4.
slits 19 and 20 are ractically completely
Fig. 10 is a detailed sketch ofthe packing filled by the film, so t at ractically no air
at the fastening screws for the base.
can find its way throught ese slits into the
As regards Fig. 1, the apparatus illustrated evacuated apparatus. In order to increase
_
45 consists of the cathode tube 1, in' the top of the air-tightness of the slits, their sides can 95
‘ which the cathode 2 is arranged and_1n the be fitted with flexible lugs, which press ’
bottom the anode 3. The cathode 2 1s con
50
against the edge of the film and thereby ren
nected with the h. t. side of a transformer der the passage of air more diilicult. The
via the bushin 4. The bottom of the cathode longer the Vslits are, the better is of course,
`tube is joine to the metal tube' 6, the top the packing.
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1,786,450
In order to limit the output of the pumps part of the yfilm can be taken, after it has
een separated from the remaining part by
pressure between theouter air and recording the knife 23.
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space_'ymay be distributed by roviding ex
Fig. 4 shows a somewhat altered design,
tensions 26 in the slits, bein eit er connected in which the slit 20 does not follow a straight 70
to prevacuum stages of t e high vacuum path but is curved shaped foi' the purpose
pump,-.or, as shown in the drawing, to spe of increasing thev resistance to the passage of
cial`prevacuum pumps 24 and 25 via the air. Although it is also possible to construct
»pressure equalizing- spaces 27 and 28..
the> slit with stationary walls, it is advan
In general it will be easily possible to tageous to replace one side of the vcurved parts 75
shove the beginning of the film out of the by the spools 46 and 47, so that the film may
drum 13 into the slit 19 and on through the slide more easily. One or both spools can be
for maintaining the vacuums, the drop of
10
recording chamber 21 into the slit_20. Lugs driven by the motor 48 over the worm gearing
54 are rovided to facilitate guiding of the 49. The shaft of the toothed wheel 49 is pro
n view of the fact that in s ite of‘all vided at its end with lugs 57, which engage
15 film.
precautions sticking may occur, 1t is best in slots 58 in the spool. , Since the front side
to make the side wall 29 of the base piece, ofthe spools must be air-tight so as to preventl
which ‘closes‘the slit on the side, detachable, air entering the slit, the spools are appro- '
in order to be able to readily guide the film priately supported in conical bearings as
into the slits and between the rollers'on re shown in Fig. 9.~ The conical bearing sur~ sa
moving the side wall. The side 4wall is fas faces 50 can be easily made air-tight by means
tened to the base Iìiece by'means of sc_rews 30 ` of grease.
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and either it can e ground into position or` , As it is possible for the screws with which
a packing 31 of 4rub er can be inserted be the detachable side wall is fastened to leak in
26 j tween the wall and base piece.
._ à
ì
the course of time, it is advisable to provide
The slits 19 and 20, made according to the them with an additional packing as in Fig.
invention, are capable of maintaining the 10. The detachable side wall 29 is thus de
vacuum in'the recordin chamber, even if, signed so thateach screw hole 51 is surrounded
' as illustrated in Fig. 1, t e entrance .and egiit with a circular shaped collar 52 having a
-l positions fforr the film are in connection with ground outer surface. The ingress of air to
the external air, however it- is advantageous the screw is prevented by a cap 53 mounted
to provide the cover 32 of the drum 13 with on the collar, the inner conical surface of the
aground conical edge. ' By this means an ez.: cap` being ground.
cessive 'ingress of air is avoided and 1t 1s
rom the above description it is clear that,
ossiblelto stop the pumps for a time even with a cathode ray oscillogra h embodying
- uring service.y
my invention any number o photographs
' In Fig. 2 a design incorporating the inven can be taken successively without opening the
tion is shown, in which the ñlm 43 is unwound recording chamber and thereby disturbing
from a spool 33 and wound on a spool 34. the vacuum.l This advantage is of great im
Both spools are arranged in the base 10 and portance especially in the „study of atmos
the film passes through the narrow curved pheric disturbances in h. t. conductors, since
slits 35 andI 36 between them. The slits nare the cathode ray oscillograph is thus always
90
100
108
as- in Fig. 1 provided with extensions 37, read for service and can also record a large
which are in connection with the vacuum num er of disturbing waves occurring at
50
pumps 38, 39, 40 andA serve to distribute the short intervals. ~Apart from this, it is natu
pressure drop between the outerair and lthe rally also important for laboratory measure
recording chamber. The recording chamber ments that by using a cathode ray oscillo
21 is evacuated by means of a high vacuum' graph according to my invention the time at
pump via thetube 41. The film is moved by disposal can be fully utilized, as the prelimi
~means of the spool 34, driven by the motor nary work merely consists in inserting the
42 over the worm gearing 43.
film roll and evacuating the cathode tube only
1l.
115
‘ In orderto avoid the difficulties encountered once for a large number of records.
in maintaining the recording chamber air
Although I have described some embodi
tight, one slit can be done away with and the ments of 'my invention, it will be obvious to
56 'film spool arranged directly in the recording those skilled in the art that various modifica 120
chamber, asshown in Fig. 3.v The base 10 is tions may be made in the details of construc
lconvex at one side of the recording chamber, tion and in design and proportion of the
21 and in the bulge 44 av film spool 45 is ar several parts without departing from the
ranged. In an extension 46 on the opposite principles herein set forth.
'side of the base, the slit 20, its extension 26
I claim as my invention: 125
connected with the vacuum pumps 24 and 25,
1. In a cathode ray oscillogra- h, in combi
as well as the spools 15 and 16, are-provided. nation, a cathode tube, means or diverting
The s ools driven by the motor 18 draw the the catho-de rays, means for the evacuation
film» rom the drum 45 and convey it into of the tube, a base piece on the end of the
the film box 22, out of which ,the- exposed tube and openings in said base piece adapted
13.
1,786,456
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for the insertion and extraction of a body end of the tube, long narrow canals provided
isptäared'with a layer which\is sensitive to withenlargements, extending over extensions
l1g t.
1
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of said base piece on both sides of the base
2. In a cathode ray oscillograph in combi
nation a cathode tube, means for the evacua
tion o the tube, a base piece provided with
openings adapted for the insertion and ex
piece, vacuum pumps connectedoto the _record
chamber in sald base piece and to the tube,
said pumps having ressure equalizing spaces
which are connected to said enlargements by
sucking tubes;
traction of a bod cove-red with a layer which
is sensitive to lig t, and means for the evacua
10
70
10. In a cathode ray oscillograph, in com- y
bination, a cathode tube, a base piece on the
tion of said base piece.
3. In a cathode ray oscillograph, in combi
end of the tube -forming a record chamber,
long narrow canals provided with enlarge
nected with'said cathode tube, a base piece
provided with openings adapted for the in ments, extending over extensions of said base
nation, a cathode tube, vacuum pumps con- '
15
l20
piece on both sides of the base piece, lmeans
sertion and extraction of a bod covered with for evacuating the cathode tube, the record
a layer which is sensitive to lig t, and a suck chamber and the enlargements of the canals,
ing tube connecting said base piece with said one
canal leading to a drum which contains a
vacuum pum s.
p
`
spool
adapted to admit a íilm, the other canal
4. In a cat ode ray oscillograph, in combi leading
between two spools adapted to be
nation, a cathode tube, a base piece on the rotated.
end of the tube, means for the evacuation of '~11. In a cathode ray oscillograph, in com
said tube land said base piece,4 and narrow
slits provided in opposite side walls of said bination, a cathode tube, a base piece on the
base
iece.
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end of the tube forming a record chamber,
i
slits running parallel to the front
5._ n a cathode ray oscillograph, in com - narrow
wall of the record chamber provided in op
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bination, a cathode tube, a base piece on the posite side walls of said record chamber, said
end of the tube, means for the evacuation of
being continued in the base piece thus
said tube and said base piece, and narrow slits
forming narrow curved canals each of them-
30
slits running parallel to the front wall of the leadingto a spool being provided in the base
base piece, provided in opposite side walls
of said base piece.
35
p
.
12. In a cathode ray oscillograph, in com
6. In a cathode'ray oscillograph, .in com
bination,
tube, a base piece on the
bination, a cathode tube, a base piece at the end of thea cathode
tube forming a record chamber,
end of the tube, means for the evacuation of vacuum
pumps connected to the tube and the
said tube and said base piece, narrow slits
record chamber, narrow canals leading from
running parallel to the front wall of the the
chamber to spools provided in the
said base piece, provided in opposite side baserecord
piece,
said canals having enlargements
Walls of said base piece, said slits being con which are connected
pressure equalizing
tinued/over, extenslons on both sides of the spaces to said vacuumvia
pumps.
base piece, thus forming long narrow canals
in them.
45
piece, said spools being adapted to be rotated.
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13. In a cathode ray oscillograph, in com
bination, a cathode tube, a base piece on the
7. In a cathode ray oscillograph, in com
end of the tube forming a-record chamber,
bination, a cathode tube, a base piece on the means
the evacuation of the tube and the
end of the tube, means for the evacuation of record for
chamber, a spool in the record cham~
said tube and said base piece,>narrow slits ber being
adapted to admit a film, a narrow
runnin parallel to the -front wall of the
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105
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slit provided in the side wall of the record .
base piece, provided in opposite side walls chamber, said slit being continued through an
of said base piece, said slits being continued extension of the base piece, thus forming a
50
over extensions on both sides of the base long narrow canal which leads between two
piece, thus forming lon narrow canals in spools
at the end of said extension, the spools
'.them, one'of _the side Wa ls of the base piece being adapted
to be rotated.
being` adapted to be removed.
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8. In a cathode ray oscillograph, in com
60
115
14. In a cathode ray oscillograph, in com
bination, a cathode tube, a base piece on the
bination, a cathode tube, a base piece on the end of the tube forming a record chamber,
end of the tube, means for the evacuation of vacuum pumps connected to the tube and
said tube and s_aid basepiece, narrow slits the record chamber, a spool in the record
running parallel to the front'wall of the base chamber being adapted to admit a film, a
piece provided in opposite side walls of said long narrow canal leading from the record
base piece, said slits being continued over chamber through an extension of the base
extensions on both sides of the base piece, piece to two spools at the end of said exten
thus forming 'long narrow canals in them and sion, said canal `having enlargements which
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125
extensions in said canals with means for the are connected via pressure equalizing spaces
evacuation of these extensions.
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9. In a cathode ray oscillograph, in com
to said vacuum pumps.
,
15. In a cathode rayï oscill'ograph, in com
bination, a cathode tube, a base piece on the bination, a cathode tube, a base piece on the 130
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4,
l
1,736,456
end of the tube forming a record chamber,
' means for the evacuation of the tube and the
record chamber, a spool in the record cham
ber being adapted to admit a film, a narrow
5 curved canal leading from the record cham
-ber through the base piece to the external
air and lugs in the record chamber walls,
ada ted to guide the film from said spool
to t e entrance of said canal.
10
ß
.
16. In a cathode ray‘oscillograph, in com
' bination, a cathode tube, a base piece on the
end ofthe tube-forming a record chamber,
vacuum pumps connected to the tube and
theA recordl chamber, a spool in the record
` Amchamber vbeing adapted to admit a film, a
narrowcurved canal leading from the record "
>>»chamber'.'through the base piece to the ex
ternalail'.
enlargements 1n said canal be
ing connected via pressure equalizing spaces
go to said vacuum pumps.
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v17.l In acathoderay oscillograph, in com
bination, a cathode tube, a base piece on the
end of the tube forming a record chamber,
vacuum pumps connected to the tube and
g5 the record chamber,- a spool inthe record
chamber being adapted to admit a film, a nar
row curved canal leading from the record
chamber through the base piece to the ex
ternal air, enlargements in said canal being
30 connected via pressure equalizing spaces to
said vacuum pumps, one side of the curved
vparts of the canal being replaced by rolls
which -are adapted` to be rotated.
.
18. In a cathode ray oscillograph, in com
-35 bination, a cathode ray tube, a base iece
on the end of the tube formin a record c am
ber, means for the evacuation of the tube
and the record chamber, a spool in the record
chamber being adapted to admit a film, a
40 narrow curved canal leading from the record
chamber through the base piece to the' ex»
~ ternal air, one side of the curved arts of,
- the canal being vreplaced by rolls 'w ichare
adapted to be rotated'and have conical bear~~
,45 ing surfaces.
19. In a cathode ray oscillograph, in ccm
bination, a cathode tube,-a base piecel on the
end of the tube forming a ,recordchamben
vacuum pumps connected to the tube and the
50 record chamber, a spool in the record cham
ber being adapted to admit a film, a narrow
curved canal leading froml the record cham
ber through the base piece to the external
air, enlargements in said canal being con
~55 nected via pressure equalizing spaces to said '
vacuum pumps, one side of the curved parts
of the canals being replaced by rolls which y
are adapted to be rotated and have conical
bearing surfaces, one of the side walls of the
60 base piece, covering the record chamber, the »
spool for the ñlm and the canal, being adapt
ed to be removed.
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In testimony whereof I ailix my signature.
. .65
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‘ADoLE MATTHIAS.