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Collection
Queen's University School of X-Ray Collection
Category
Diagnostic & Treatment Artifacts
Classification
Diagnostic Radiology
Accession Number
995004049
Description
Timer which consists of a rounded black bakelite case with a flat round metal scale and timer (in seconds 0-12) pointer on the front; the top of the timer has a round white button which stops the x-ray exposure when at 0; the sides of the timer have grooves which enable it to be held; the bottom of…
  1 image  
Accession Number
995004049
Collection
Queen's University School of X-Ray Collection
Category
Diagnostic & Treatment Artifacts
Classification
Diagnostic Radiology
MeSH Heading
Radiography -- instrumentation
Description
Timer which consists of a rounded black bakelite case with a flat round metal scale and timer
(in seconds 0-12) pointer on the front; the top of the timer has a round white button which
stops the x-ray exposure when at 0; the sides of the timer have grooves which enable it to
be held; the bottom of the timer has a [?] cm electric cord coming out of it; the top back
of the timer has a metal attachment which allows it to be hung
Number Of Parts
1
Maker
Liebel-Florsheim Company
Site Made (City)
Cincinatti
Site Made (State)
Ohio
Site Made (Country)
United States of America
Material
metal: silver
plastic: white; black
Inscriptions
The front of the timer has a dial and scale 0-12 seconds; it also reads, "The Liebel Florsheim
Co. Patents No. 1,677,107 1,547,442"; hanging hook has the number 84779 stamped into the back
Permanent Location
Storage Room 0010
0010-F3-1
Dimension Notes
Length: 18.0 cm. x Width: 7.5 cm. x Depth: 7.0 cm.
Condition Remarks
Timer was dusty and dirty; the electric cord was not tested, but the timer will go if set
Copy Type
Original
Reference Types
Person
Book
JPG
Reference Comments
Bernie Ziomkiewicz; "The Trail of the Invisible Light" by E.R.N. Grigg MD; CD #4
Images
Less detail
Dates
1913
circa 1913
Collection
University Health Network - Academy of Medicine Collection
Category
Diagnostic & Treatment Artifacts
Classification
Diagnostic Radiology
Accession Number
1969.499.1
Description
Glass tube with a large bulb in the centre containing X-ray apparatus (a); on the underside of the bulbous section are two tubular projections extending out, one straight and the other at right angles; each contains a metal rod; the tube rests on a wooden mount (b) that has two half-circular wooden…
  1 image  
Accession Number
1969.499.1
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
Glass tube with a large bulb in the centre containing X-ray apparatus (a); on the underside of the bulbous section are two tubular projections extending out, one straight and the other at right angles; each contains a metal rod; the tube rests on a wooden mount (b) that has two half-circular wooden arches (c,d) that go over the tube and affix it firmly to the mount; Note: item is missing.
Number Of Parts
4
Part Names
a - tube - Size: Length 53.3 cm x Diam. 15.9 cm
b - mount - Size: Length 38.4 cm x Width 14.9 cm x Depth 17.5 cm
c - half-circle - Size: Length 9.8 cm x Width 2.2 cm x Depth 3.8 cm
d - half-circle - Size: Length 9.8 cm x Width 2.2 cm x Depth 3.8 cm
Provenance
Acquired from the Academy of Medicine; source unknown.
Maker
Macalister, Wiggins & Co. (?)
Dates
1913
circa 1913
Date Remarks
The first Coolidge tube was produced in 1913.
Material
metal: silver
glass: clear
wood: brown
Inscriptions
On glass tube: "MACALISTER, WIGGINS & CO."
Permanent Location
Storage Room 0010
0010-F3-8
Temporary Location
Item is missing.
Copy Type
Original
Reference Types
JPG
Reference Comments
CD #UHN
Research Facts
In the first Coolidge tube, P/electrons were emitted from a tungsten wire filament that was itself the cathode. Named for H.D. Coolidge. The glass protrusions contain activating or regenerating devices that cause occluded gases to be liberated, thereby producing more potential electrons and softening the resultant X-ray emission. The cathode is "cupped," causing the electron beam to be focused on the target material.
Images
Less detail