John R Andra

US Patent:

40397750, Aug 2, 1977

Filed:

Oct 1, 1975

Appl. No.:

5/618498

Inventors:

John R. Andra - Pittsburgh PA

Assignee:

Fisher Scientific Company - Pittsburgh PA

International Classification:

F27D 1102

US Classification:

219385

Abstract:

An improved incubator includes a heated door which increases temperature uniformity inside the incubator.

US Patent:

39871339, Oct 19, 1976

Filed:

Sep 5, 1975

Appl. No.:

5/610571

Inventors:

John R. Andra - Pittsburgh PA

Assignee:

Fisher Scientific Company - Pittsburgh PA

International Classification:

B01F 304

US Classification:

261130

Abstract:

A humidifier for conditioning fluid for delivery to a test chamber, such as an incubator, includes means for automatically regulating the quantity, level and temperature of a body of water through which mixed gases, such as air and CO. sub. 2, are bubbled to entrain moisture in the gases. The water is heated to below its boiling point. The relative humidity of the saturated mixture delivered to the test chamber is usually at least 90% at temperatures between about 30. degree. - 60. degree. C.