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circular konimeter

https://mhc.andornot.com/en/permalink/artifact6809
Collection
University Health Network - Academy of Medicine Collection
Category
Basic Science Artifacts
Classification
Basic Science, Laboratory Instrumentation
Accession Number
1975.4.6
Description
A circular, puck-like head is attached to a cylindrical bar that is partially hollow; the face of the circular part has a thin metal plate that has three screws equidistant from each other; the top hole shows a number that can range from 1-29; at the base is a cross-like handle attached to a cogwhe…
  1 image  
Accession Number
1975.4.6
Collection
University Health Network - Academy of Medicine Collection
Category
Basic Science Artifacts
Classification
Basic Science, Laboratory Instrumentation
MeSH Heading
Environmental Monitoring
Description
A circular, puck-like head is attached to a cylindrical bar that is partially hollow; the face of the circular part has a thin metal plate that has three screws equidistant from each other; the top hole shows a number that can range from 1-29; at the base is a cross-like handle attached to a cogwheel inside of the circular part; this handle, when turned, causes the numbers that show through the hole in the face to change upwards or downwards, depending on which way the handle is turned; at bottom of cylindrical bar and inside the cylinder is a circular metal plate with a threaded rod in the centre; screwed onto the rod is a washer-like piece of metal; this whole portion slides downward into the cylinder when pushed and creates a certain amount of air pressure when depressed.
Number Of Parts
1
Provenance
Acquired from the Academy of Medicine; source: Mr. E. Wood, Charles H. Best Institute, Toronto.
Maker
A. F. H. Devers
Site Made (City)
Johannesburg
Site Made (Country)
South Africa
Material
metal: yellow
Inscriptions
Around the rim of the round part is: "CIRCULAR (DEVERS) KONIMETER"; on back: "A.F.H. DEVERS // INSTRUMENT MAKER // BOX 5598 JO'BURG // 5cc // 80"
Permanent Location
Storage Room 0010
0010-C3-9
Dimension Notes
Length 17.5 cm x Width 7.9 cm
Copy Type
Original
Reference Types
JPG
Reference Comments
CD #UHN
Research Facts
Used to measure dust in the atmosphere.
Images
Less detail