English: A diagram of a en:Bridgman seal, a seal against high pressures.
The top is outside the pressure vessel; the bottom is inside.
The topmost cylinder is the drive piston; it has an external force applied to it to pressurize the vessel.
The six squares are cross-sections through three rings; the topmost (dark gray) one is a hard material, the middle one a softer one, and the bottom one a much softer one. Bridgman originally used hard steel, softer steel, and rubber. The rubber would actually protrude into a groove in the soft steel ring above, to help hold it in place (not shown).
The upturned T shape is a horizontal disk on a vertical shaft; it compresses these rings when the pressure vessel is pressurized.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.