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Патент USA US2129892

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Sept. 13, 1938.
Filed Sept. 14, 1936
Patented Sept. 13, 1938
Hans Vatter, Berlin-Charlottenburg, Germany,
assigner to Siemens & Halske Aktiengesell
schaft, Siemennstadt, near Berlin, Germany, a
corporation of Germany
Application September 14, 1936, Serial No. 190,632
In Germany September 3, 1935
4 Claims. (Cl. 20o-144)
My invention relates to improvements in vac
of the drawing experiences a smaller resistance
uum circuit breakers.
than in other directions of axis.
, ì
It ~is well known in the art to design vacuum
One of the electrodes is preferably formed as
-circuit breakers in such a manner that the ac
a ring, in the interior of which is placed the other
tuation of the switching members is effected in
electrode. In this manner, the movable elecside‘the vacuum vessel by means of an elastic
portion of the vessel wall. For instance, in glass ' trode is brought into proper engagement with
the other electrode, irrespective of the direction
bulb switches a portion of the glass surface has of motion of the movable electrode. By dimen
hitherto been made elastic by designing it in sioning the outer diameter of the ring in a cor
the form of corrugated sheet iron. Glass bulb responding manner the maximum deflection of
switches have the great disadvantage in that they the movable electrode may at the same time be
are comparatively fragile so that they cannot be limited. Fig. 2 shows a sectional view of such
used for rough services, particularly for military «a vacuum circuit breaker. 'I‘he movable electrode
purposes on field vehicles or the like.
9 carries a ring I4 inside of which >is placed the
According to the invention, vacuum circuit iixed electrode. The electrode 9 comes into enbreakers of high resistivity and efliciency are gagement with the electrode 9 independently of
designed in the way illustrated by the accom
the direction of motion of the electrode 9. 'I'he
panying drawing in which
maximum deñection is attained when the outer
Fig. l shows a circuit breaker in longitudinal edge of the ring I4 contacts with the inner wall
section, and
of the tube I.
Fig. 2 a central transverse section through` a
I claim as my invention:
modifled form of the breaker.
'I‘he enclosure of the circuit breaker shown
in Fig. 1 consists of a tube I of vacuum-tight
« 25 ceramic material.
The ends of the >tube are
metallized as indicated at 2 and 3; One end'of
the tube is closed by a metallic cap 4 which is
soldered at 3 to form a vacuum-tight joint. The
soldering is effected in the manner that a ringä
30 consisting of soldering material is at ñrst ar
ranged in the cap. To prevent the soldering
material from ñowing inside the discharge vessel
a disc 6 is so arranged as to cause the molten
soldering material to ñow in the joint l. The cap
35 I may at the same time serve to support one
electrode 8. 'I'he electrode 9 or the counter
electrode 9 may be designed at least in part as
a tube and serve as a connection for a vacuum
pump during the manufacturing process.
40 other end of the tube I carries, for instance, a
flange-shaped extension Il), at the periphery II
of which is soldered or welded a metallic dia
phragm I2.
The counter-electrode 9 is secured to the metal
45 lic diaphragm so that when the outer portion
of the electrode 9 is moved the electrodes 9 and 9
may be brought into engagement at I3. It is
understood that also any other contact mecha
nism which is actuated upon moving the part 9,
50 -may be arranged in the interior of the tube. In
' some cases it may be preferable not to give the
diaphragm I2 a circular form but design it in
, such a manner that the movement of the part 9
in the direction of one of the axes of the dia'.
55 phragm I2, as shown bythe arrows in the plane
1. As an article of manufacture, a vacuum
switch comprising a tube of ceramic material
adapted to> be evacuated, a fixed and a movable
contact element cooperatively disposed in said 25
tube, two metal end caps for closing the two tube
ends, each cap electrically connected with one
of said contact elements and serving as a support
therefor, each tube end having `a metal layer vac
uum-tight attached to its wall with which the 30
appertaining cap is in contact and solder for
vacuum-tight connecting each cap with the con
tacting metal layer, a protective disc arranged
between each of said caps and the interior part
of _said tube and extending across the tube open- 35
ing inside of each cap designed to conñne the
solder flow to the joint between the inner cap
wall and the adjacent metal layer, one of said
caps having an elastic wall in which the movable
contact element is mounted vacuum-tight inter- 40
mediate its-ends to permit the movement of said
element from outside.
2. As an article of manufacture, a vacuum
switch comprising a tubular container of ceramic
material, a metallic coating disposed on the out- 45
side surface of each end of said container, a metal
cap placed over each end of said container, two
coacting contact electrodes movable relative to
each other, each being mounted ,to one of said
'caps respectively, a solder bond tightly connect- 50
ing said coating and said cap, and a protective
disk'arranged in said cap so as to close the in
terior of said container against said solder.
3. As anv article of manufacture, an evacuated
ceramic tube forming the enclosure of an elec- 55
tric control device and having a tube opening
covered by a metal cap, in combination with a
metallic coating disposed on and integral with
the surface portion oi' said tube covered by said
can. solder forming a bond between said coating
and said cap, said cap and said tube being de
signed to form an annular interstice for the
reception oi a ring-shaped body consisting of said
solder so as to allow producing said bond by
heating said body within said cap, and a protec
tive disk arranged in said cap and closing said
opening against said solder for coniining the now
o! said solder.
4. As an article of manufacture, an electric
device comprising a container oi ceramic maœ
rial having an opening covered by a metal cap.
in combination with a metal coating disposed on
and integral with the ceramic surface oi said
container, a solder bond connecting said coating
and said cap, and a protective member disposed
ln said cap so as to close said opening against
said solder in order to conñne the iiow of said
solder to the joint between cap and coating when 10
producing said bond.
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