Exposure chamber

Patent · Tue Jan 01 00:00:00 EST 1980

OSTI ID:863628

Moss, Owen R ^[1]

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1. Kennewick, WA

A chamber for exposing animals, plants, or materials to air containing gases or aerosols is so constructed that catch pans for animal excrement, for example, serve to aid the uniform distribution of air throughout the chamber instead of constituting obstacles as has been the case in prior animal exposure chambers. The chamber comprises the usual imperforate top, bottom and side walls. Within the chamber, cages and their associated pans are arranged in two columns. The pans are spaced horizontally from the walls of the chamber in all directions. Corresponding pans of the two columns are also spaced horizontally from each other. Preferably the pans of one column are also spaced vertically from corresponding pans of the other column. Air is introduced into the top of the chamber and withdrawn from the bottom. The general flow of air is therefore vertical. The effect of the horizontal pans is based on the fact that a gas flowing past the edge of a flat plate that is perpendicular to the flow forms a wave on the upstream side of the plate. Air flows downwardly between the chamber walls and the outer edges of the pan. It also flows downwardly between the inner edges of the pans of the two columns. It has been found that when the air carries aerosol particles, these particles are substantially uniformly distributed throughout the chamber.

• Research Organization: Battelle Memorial Institute, Columbus, OH (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: Hazleton Systems, Inc. (Aberdeen, MD)
• Patent Number(s): US 4216741
• OSTI ID: 863628
• Country of Publication: United States
• Language: English

Related Subjects

exposure
chamber
exposing
animals
plants
materials
air
containing
gases
aerosols
constructed
catch
pans
animal
excrement
example
serve
uniform
distribution
throughout
constituting
obstacles
prior
chambers
comprises
imperforate
top
bottom
walls
cages
associated
arranged
columns
spaced
horizontally
directions
corresponding
preferably
column
vertically
introduced
withdrawn
flow
vertical
effect
horizontal
based
gas
flowing
past
edge
flat
plate
perpendicular
forms
wave
upstream
flows
downwardly
outer
edges
pan
inner
found
carries
aerosol
particles
substantially
uniformly
distributed
uniformly distribute
aerosol particle
containing gases
air flows
substantially uniformly
flat plate
aerosol particles
gas flow
substantially uniform
air flow
uniformly distributed
containing gas
chamber wall
gas flowing
air containing
distributed throughout
uniform distribution
outer edge
spaced vertically
outer edges
flowing past
flows downwardly
exposure chamber
inner edge
chamber walls
catch pans
/119/47/62/D25/