Work holders – Relatively movable jaws – Jaw features
Patent
1990-05-15
1991-01-01
Arnold, Bruce Y.
Work holders
Relatively movable jaws
Jaw features
269 21, G02B 2126, G02B 2132, B25B 1100
Patent
active
049813455
ABSTRACT:
A sample filter holder for use with a microscope for holding the filter in a planar condition on the stage of the microscope so that automatic focusing of the microscope can be performed on particle samples dispersed on the filter. The holder includes a base having a well communicating with an inlet port which is connected to a suction pump. A screen assembly is positioned within the well. The screen assembly includes a disk having a screen positioned on its top surface and secured to the disk at the peripheral edge of the screen. Small bores communicate the outer surface of the screen with the well. The filter is placed on the screen and is held in a flat disposition by the suction forces.
REFERENCES:
patent: 3328022 (1967-06-01), Miller
patent: 4744550 (1988-05-01), Oglesbee
patent: 4943148 (1990-07-01), Mondragon et al.
Berry Anthony
Nerren Billy H.
Arnold Bruce Y.
Manning John R.
Phan James
Seemann Jerry L.
Sheehan William J.
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