Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Dental
Classification
Dental
Accession Number
010020034
Description
Black-enamelled metal x-ray timer; cylinder with front and back faces attached to long handle; silver knob and dial in middle of face; notches and numbers from one to ten embossed in yellow metal on face; face on back has chart showing recommended exposure times for all teeth and different age grou…
Black-enamelled metal x-ray timer; cylinder with front and back faces attached to long handle; silver knob and dial in middle of face; notches and numbers from one to ten embossed in yellow metal on face; face on back has chart showing recommended exposure times for all teeth and different age groups; hole at top where timer can be placed on hook on x-ray unit; black rubber electrical wire coming from bottom
Number Of Parts
1
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Embossed on front: "VICTOR // TRADE MARK // REG. U.S. PAT. OFF. // MADE IN CHICAGO U.S.A. // SERIAL NO. 40684 // SECONDS"; embossed on back: "INTRA-ORAL // EXPOSURE CHART // VICTOR X-RAY CORP. // CHICAGO // U.S.A."
Permanent Location
Storage Room 0007
0007-D2-3
Dimension Notes
Length 24.8 cm x Width 8.8 cm x Depth 5.5 cm
Condition Remarks
Rubber wire broken at end, exposing wires inside; exposure chart faded; enamel chipped at top; screw missing at back
Copy Type
Original
Reference Types
Internet
JPG
Reference Comments
"Gendex Dental Systems" website
CD #9
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; this item perhaps goes with 010.020.036 or 010.020.042; the Victor Electric Corporation began making x-ray machines in 1896; they became the Victor X-Ray Corporation in 1920, were acquired by General Electric in 1926, and by 1930 the company was renamed the General Electric X-Ray Corporation