Breathing device for a closed housing of a magnetic memory device
AssigneeNippon Telegraph & Telephone Public Corporation
InventorsReizo Kaneko, Akio Tago, Shigemitsu Oguchi, Shigehisa Hukui
Life of this patent
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Abstract
In a magnetic memory device wherein a magnetic recording medium is rotated in a substantially closed chamber, there are provided a throttle between the inside and outside of the chamber, a first air fliter for filtering air flowing through the throttle to prevent moisture from entering into the chamber by diffusion, a container containing a desiccating agent and communicated with the chamber, and a second air filter located between the desiccating agent container and the chamber. In a modified embodiment, another throttle is also provided between the desiccating agent container and the substantially closed chamber.
Claims6
A breathing device for a closed housing of a magnetic memory device including magnetic memory media and a substantially closed chamber containing said magnetic memory media comprising:
- a restricted air passage interconnecting the inside and outside of said substantially closed chamber, said restricted air passage having a flow resistance such that the pressure difference between the inside and outside of said chamber is within the range of from 10 to 40 mmWG;
- a first air filter for filtering air passing through said restricted air passage;
- a container containing a desiccating agent and communicated with said chamber;
- and
- a second air filter located between said desiccating agent container and said chamber.
A breathing device for a closed housing of a magnetic memory device including magnetic recording media and a substantially closed chamber containing said magnetic memory media comprising:
- a first restricted air passage interconnecting the inside and outside of said substantially closed chamber;
- a first air filter for filtering air passing through said first restricted air passage;
- a container containing a desiccating agent and communicated with said substantially closed chamber;
- a second restricted air passage disposed between said desiccating agent container and said substantially closed chamber;
- and
- a second air filter for filtering air passing through said second restricted air passage.
A breathing device for a closed housing of a magnetic memory device including a magnetic recording medium, a substantially closed chamber containing said magnetic recording medium and means disposed adjacent said substantially closed chamber for driving said magnetic recording medium comprising;
- a first restricted air passage for intercommunicating the inside and outside of said substantially closed chamber;
- a first air filter for filtering air passing through said first restricted air passage;
- a container for containing a desiccating agent and communicated with said substantially closed chamber;
- a second restricted air passage disposed between said desiccating agent container and said substantially closed chamber;
- a second air filter for filtering air passing through said second restricted air passage;
- and
- a magnetic fluid seal located between said substantially closed chamber and said drive means.
Dependencies are inferred from the claim text.