( 27 of 29 ) |
United States Patent | 3,618,734 |
Khan | November 9, 1971 |
A specimen incubator including a closed cabinet having an access opening ch can be selectively opened and closed, and wherein are mounted a plurality of specimen support trays movable in a path in the cabinet in a manner for selective placement of any given tray at the access opening, and further including means for controllably circulating a gaseous medium in the cabinet with means provided to preclude entrance of external atmosphere into the incubator under open conditions thereof, the incubator preferably including pluralities of specimen support trays in vertically separate tiers, and movement of the trays in the individual tiers being individually separately controllable.
Inventors: | Khan; Waheed N. (Silver Spring, MD) |
Assignee: |
Research Foundation of Children's Hospital of the District of Columbia
(Washington,
DC)
|
Appl. No.: | 04/831,957 |
Filed: | June 10, 1969 |
Current U.S. Class: | 34/219 ; 119/318; 119/324; 198/793; 435/809 |
Current International Class: | C12M 1/00 (20060101); G01N 35/04 (20060101); G01N 35/00 (20060101); C12b 001/00 () |
Field of Search: | 195/139,127,142 119/15,35 198/75,181,84 21/80 34/205,211,216,233 99/182 |
2325368 | July 1943 | Christensen |
2703570 | March 1955 | Young |
3002895 | October 1961 | Freedman |
3302615 | February 1967 | Tietje |