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Dates
1925
1930
circa 1925-1930
Collection
University Health Network - Academy of Medicine Collection
Category
Diagnostic & Treatment Artifacts
Classification
Diagnostic Radiology
Accession Number
1969.494.1 a-e
Description
A Coolidge tube (a) with a somewhat irregular shape; at one end is a series of circular discs (e), probably for rapid heat diffusion; the glass tube is cylindrical on either side of a bulbous sphere that is just off-centre; at the other end of the tube is a fuse-like, threaded end piece; the intern…
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Accession Number
1969.494.1 a-e
Collection
University Health Network - Academy of Medicine Collection
Category
Diagnostic & Treatment Artifacts
Classification
Diagnostic Radiology
MeSH Heading
Diagnostic Imaging
Radiography -- instrumentation
MM= Radiography -- tube
Description
A Coolidge tube (a) with a somewhat irregular shape; at one end is a series of circular discs (e), probably for rapid heat diffusion; the glass tube is cylindrical on either side of a bulbous sphere that is just off-centre; at the other end of the tube is a fuse-like, threaded end piece; the internal mechanism can be seen; the tube rests on a wooden mount (b) with two additional wooden archlike pieces to hold it in place (c,d); Note: item is missing.
Number Of Parts
5
Part Names
a - Coolidge tube - Size: Length 47.0 cm
b - wooden mount - Size: Length 38.3 cm x Width 15.1 cm x Depth 18.5 cm
c - wooden arch - Size: Length 9.8 cm x Depth 3.5 cm
d - wooden arch - Size: Length 10.1 cm x Depth 3.6 cm
e - discs - Size: Depth 5.7 cm x Diam. 7.5 cm
Provenance
Acquired from the Academy of Medicine; source unknown.
Maker
General Electric
Site Made (City)
Toronto
Site Made (State)
Ontario
Site Made (Country)
Canada
Dates
1925
1930
circa 1925-1930
Date Remarks
Last patent date printed on tube is 1922
Material
glass: clear; translucent violet
metal: silver
wood: dark brown
Inscriptions
On tube: two concentric circle; on the innermost circle is the GE logo; around that is printed, "COOLIDGE // TUBE"; under that is "R144"; also on tube: "PATENTED // 1912 1913 1914 1915 // 1918 1920 1921 1922 // THIS TUBE IS NOT LICENSED TO BE // RE-EXHAUSED [sic] OR REPAIRED NOR IS THE // METAL HEREIN CONTAINED LICENSED TO // BE USED EXCEPT IN THIS PARTICULAR // TUBE. // CANADIAN GEN. ELEC. CO. LTD // TORONTO —CANADA"; at bottom, just below the broken glass part is the number "V44019" inscribed on the rod.
Permanent Location
Storage Room 0010
0010-F3-8
Temporary Location
Item is missing.
Condition Remarks
Glass broken at one end.
Copy Type
Original
Reference Types
Photo
JPG
Reference Comments
CD #UHN
Research Facts
Self-rectifying radiator-type Coolidge tube; an advance on universal type.
Images
Less detail