| 摘要 |
<p>In the use of certain types of delicate measuring apparatus, and in the use of high power optical instruments, and various other situations, it is highly desirable to have a table top or other surface free of all vibration. This disclosure relates to improvements in vibration isolated tables which have heavy table tops of high inertia supported on air mounts that damp out the vibrations of the ground or floor from which the table is ultimately supported. Improved air mount envelope constructions provide effective dampling and convenient adjustment of the weight that the air mounts can support, and effective variations in the air mounts own natural frequency when necessary. Safety features protect against human error of excessive and insufficient pressure in the air mounts.</p> |
