Electricity: circuit makers and breakers – Electric switch details – Cases and bases
Reexamination Certificate
1997-05-28
2001-03-20
Luebke, Renee (Department: 2833)
Electricity: circuit makers and breakers
Electric switch details
Cases and bases
C200S306000, C335S151000
Reexamination Certificate
active
06204460
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates mainly to a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, a method of producing the sealed contact device, and a sealing method, and particularly to a technique in which a configuration for forming a gastight space is prevented from being projected from the housing, so that a projection is not formed on the housing.
2. Background
Conventionally, as shown in
FIG. 35
, a sealed contact device Aa in which a stationary contact
2
and a movable contact
3
are disposed in a housing
1
having a gastight space E is configured
FIG. 35
is similar to the subject matter disclosed in Japanese Patent Publication No. Hei. 5-28457 (see FIG.
1
). A vent pipe
7
a
is projected from the housing
1
, the interior of the housing
1
is evacuated or a gas is introduced into the housing via the vent pipe
7
a,
and the vent pipe
7
a
is then compressed so as to be sealed.
In this configuration, since the vent pipe
7
a
is used, the vent pipe
7
a
is projected from the housing
1
. Therefore, the vent pipe
7
a
causes much cumber in installation, package, storage, and the like of the sealed contact device Aa.
SUMMARY OF THE INVENTION
With the above problem in view, it is an object of this invention to provide a sealed contact device, a method of producing the sealed contact device, and a sealing method in which a configuration for forming a gastight space is prevented from being projected from a housing, so that a projection is not formed on the housing.
The first aspect of the invention is a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, a metal lid is joined in a gastight manner to an opening end of a container body, the housing including the container body made of ceramics, a vent hole is formed in the metal lid, and the vent hole is sealed.
The second aspect of the invention is a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, a vent hole is formed in an electrode, the stationary contact being disposed on the electrode, the electrode being extended to an outside of the housing, and the vent hole is sealed.
The third aspect of the invention is a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, the device includes a movable shaft, the movable contact being disposed on the movable shaft, the movable shaft being extended to an outside of the housing and movable, a vent hole is formed in the movable shaft, and the vent hole is sealed.
The fourth aspect of the invention is a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, wherein a vent hole is formed in a container body, the housing including the container body made of ceramics, and the vent hole is sealed.
In the fifth aspect of the invention, the sealed contact device of the first aspect of the invention is configured so that a metal portion of the opening end of the container body, and the metal lid are made of a metal material which is similar in coefficient of linear expansion to the container body.
The sixth aspect of the invention is a method of producing a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, a metal lid is joined in a gastight manner to an opening end of a container body, the housing including the container body made of ceramics, a vent hole is formed in the metal lid, a gas is supplied and exhausted via the vent hole, and a periphery of the hole is then melted and the vent hole is closed by a molten metal, thereby sealing the hole.
The seventh aspect of the invention is a method of producing a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, a vent hole is formed in an electrode, the stationary contact being disposed on the electrode, the electrode being extended to an outside of the housing, a gas is supplied and exhausted via the vent hole, and a periphery of the hole is then melted and the vent hole is closed by a molten metal, thereby sealing the hole.
The eighth aspect of the invention is a method of producing a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, wherein the device includes a movable shaft, the movable contact being disposed on the movable shaft, the movable shaft being extended to an outside of the housing and movable, a vent hole is formed in the movable shaft, a gas is supplied and exhausted via the vent hole, and a periphery of the hole is then melted and the vent hole is closed by a molten metal, thereby sealing the hole.
The ninth aspect of the invention is a method of producing a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, wherein a metal lid is joined in a gastight manner to an opening end of a container body, the housing including the container body made of ceramics, a vent hole is formed in the metal lid, a further metal member having no hole is attached to the vent hole, and the metal member is melted to close the vent hole, thereby sealing the hole.
The tenth aspect of the invention is a method of producing a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, a vent hole is formed in an electrode, the stationary contact being disposed on the electrode, the electrode being extended to an outside of the housing, a further metal member having no hole is attached to the vent hole, and the metal member is melted to close the vent hole, thereby sealing the hole.
The eleventh aspect of the invention is a method of producing a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, the device includes a movable shaft, the movable contact being disposed on the movable shaft, the movable shaft being extended to an outside of the housing and movable, a vent hole is formed in the movable shaft, a further metal member having no hole is attached to the vent hole, and the metal member is melted to close the vent hole, thereby sealing the hole.
The twelfth aspect of the invention is a method of producing a sealed contact device in which a stationary contact and a movable contact are disposed in a housing having a gastight space, a vent hole is formed in a container body, the housing including the container body made of ceramics, a further metal member having no hole is attached to the vent hole, and the metal member is melted to close the vent hole, thereby sealing the hole.
In the thirteenth aspect of the invention, the method of producing a sealed contact device of any one of the sixth to eighth aspects of the invention is configured so that a projection is formed by a working method which is not a removal working method, to form the vent hole, a gas is supplied and exhausted via the vent hole, and the projection in the vicinity of the hole is then melted and the vent hole is closed by a molten metal, thereby sealing the hole.
In the fourteenth aspect of the invention, the method of producing a sealed contact device of any one of the sixth to eighth aspects of the invention is configured so that a raised piece is deformed to close the vent hole, and a periphery of the hole which has been reduced in size is then melted by heating, thereby sealing the hole.
In the fifteenth aspect of the invention, the method of producing a sealed contact device of the fourteenth aspect of the invention is configured so that the raised piece is formed on an inner side of the container body, thereby forming the vent hole, a gas is supplied and exhausted, a root portion of the raised piece is locally heated to deform a par
Hojo Tsukasa
Kuwata Toru
Matsumura Shusuke
Otani Ryuji
Luebke Renee
Matasushita Electric Works, Ltd.
Sughrue Mion Zinn Macpeak & Seas, PLLC
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