The United States of America As Represented by the Department of Health

Alan H Rich

Douglas E Gaasterland

Roy Repaske

Jimmie L Slemp

Thomas E Tedder

A filtration apparatus provides for semiautomatic operation by including a filter element dispenser located at a filtration station. In order to effect removal of a used filter element from the filtration station, a tilting mechanism allows for tilting of a filtration stage which breaks or interrupts a vacuum which is otherwise continuously applied to the filtration station. In operation, the filter dispenser is manually rotated about a support to dispense a filter element in a filtration port at the filtration station. Next, a filtration cup which includes a filtration well is manually rotated about the support and positioned to be seated in the filtration port. After the filtration cup is seated in the filtration port a liquid to be filtered can be dispensed into the filtration well.

Vacuum filtration apparatus

An apparatus is provided for permitting high power laser pulses to be controllably focused in the center of a biomicroscope field of observation by means of a mirror movable in three dimensions. The shutter mechanism, synchronized to the generation of each laser pulse, closes to protect the eyes of an observer against damage from the laser. The mirror is mounted on a shaft disposed on a housing for movement longituinally of its axis, rotationally about that axis, and pivotably about a point on the axis. The apparatus is portable so as to be easily transported to various locations in a medical facility.

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Eldersburg, MD, United States of America

Alan H Rich