Rotatable support for selectively aligning a window with the cha

Radiant energy – Inspection of solids or liquids by charged particles – Electron probe type

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Details

2505051, 378161, G01N 2300

Patent

active

044632576

ABSTRACT:
A mechanism is disclosed for selectively aligning one of two different radiation passing windows with the channel of a measuring device. The measuring device includes an elongated tubular probe having a channel formed therein. A spherical cap, having a diameter less than the diameter of the probe, is mounted to the end of the probe, and is rotatable between a first and second position. A pair of windows are mounted in the cap in a manner such that when the cap is oriented in the first position, the first window is aligned with the channel, and when the cap is oriented in the second position, the second window is oriented with the channel. In the preferred embodiment, an outer tubular member is mounted around the probe and includes axially projecting teeth which engage with a spur gear connected to the rotatable cap. The rotation of the outer tubular member relative to the probe drives the spur gear for rotating the cap.

REFERENCES:
patent: 3319064 (1967-05-01), Guernet et al.
patent: 3864570 (1975-02-01), Zingaro
patent: 4107562 (1978-08-01), Koller et al.

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