Measuring arrangement

Details Measuring arrangement Measuring arrangement

1975-12-19

1977-11-08

Aegerter, Richard E.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 80, 277135, F16J 1516

Patent

active

040572587

ABSTRACT:
A laser interferometer is disclosed in which the measuring path is enclosed in an elongated hollow body which has a flexible slot along one side through which extends the entrainment means for the movable reflector enclosed within the hollow body. This hollow body is maintained under a vacuum, with the area around the flexible slot being filled with a fluid to help maintain the vacuum. This fluid may be highly viscous oil or a magnetic fluid which is maintained by the magnetic field of permanent magnets.

REFERENCES:
patent: 3031802 (1962-05-01), Leliaert
patent: 3612549 (1971-10-01), Berkowitz
patent: 3848879 (1974-11-01), Hudgins

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