Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Dental
Classification
Dental
Accession Number
010020026 a-f
Description
Dental anaesthesia unit with black plastic top (a); three gauges for oxygen, nitrous oxide and carbon dioxide have silver metal borders, glass coverings, gold-enamelled faces, printed with black, green and red enamel; silver metal knobs with grey-enamelled control panels for control, pressure, mixt…
Dental anaesthesia unit with black plastic top (a); three gauges for oxygen, nitrous oxide and carbon dioxide have silver metal borders, glass coverings, gold-enamelled faces, printed with black, green and red enamel; silver metal knobs with grey-enamelled control panels for control, pressure, mixture and flow; green-enamelled dial for oxygen, grey-enamelled dial for carbon dioxide; silver metal pipe comes out of front of stand, bends at 45-degree angle; top is supported by black-enamelled metal pole atop cross-shaped black-enamelled metal base, four black rubber wheels with silver metal casters; silver metal attachment on support pole to hold gas tank; black rubber rebreather bag attached to silver metal valve underneath top; two black rubber tubes with metal ends attached underneath; black rubber tube attached underneath ends with round pump; broken black rubber tube attached to silver metal semi-spherical inhaler with black rubber insert (b); blue metal nitrous oxide tank with silver metal top (c) with diamond-shaped white paper label printed with blue and black ink; white and green metal oxygen tank with silver metal top (d) with diamond-shaped white paper label printed with green, blue and black ink; tanks covered by beige fabric coverings with purple thread drawstring at tops (e, f)
Number Of Parts
6
Part Names
a - unit - Size: Length 88.4 cm x Width 48.0 m x Depth 48.0 cm
b - inhaler - Size: Length 1.34 m x Width 12.1 cm x Depth 7.8 cm
c - tank - Size: Length 51.7 cm x Diam. 11.5 cm
d - tank - Size: Length 51.7 cm x Diam. 11.5 cm
e - covering - Size: Length 40.3 cm x Diam. 11.5 cm
f - covering - Size: Length 40.3 cm x Diam. 11.5 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
(a) Printed on top of unit: "CONTROL VALVE // O2 DIRECT // DIRECT N2O // SHUT// PATIENT CONTROL // MIXTURE", "MIXTURE // O2-N2O // OXYGEN PERCENTAGE CONSTANT // AS PER OXYGEN GAUGE INDICATION"; printed in gauges: "GALLONS PER HOUR // CARBON DIOXIDE", "OFF ON // MEASURED N2O", "OXYGEN PERCENTAGE // THE HEIDBRINK DIVISION // THE OHIO CHEMICAL MFG. & CO. // MINNEAPOLIS"; inscribed on unit: "HEIDBRINK // MINNEAPOLIS, MINN. U.S.A."; "PAT. NO. 1687768"; (c) printed on tank label: "OHIO // MADE IN CANADA // NITROUS OXIDE // OHIO CHEMICAL CANADA // A DIVISION OF // AIR REDUCTION CANADA LIMITED", engraved on top: "Ohio Chemical"; (d) printed on tank label: "OHIO // MADE IN CANADA // FOR MEDICAL USE OXYGEN FOR MEDICAL USE // OHIO CHEMICAL CANADA // A DIVISION OF // AIR REDUCTION CANADA LIMITED // CAUTION - KEEP AWAY FROM OIL AND GREASE", engraved on top: "Ohio Chemical"
Permanent Location
(a, b, c ,d) Storage Room W2
W2-536-1-1
(e, f) Storage Room W2
W2-536-3-2
Condition Remarks
Grey enamel on control panels scratched, worn; metal underneath top rusty in places; crack in plastic at back of unit; large piece of plastic missing at back of unit; rubber pipe broken on (b), covered over with tape; paper labels on tanks (c, d) worn, crinkled, enamel peeling and metal rusty; fabric coverings (e, f) dirty
Copy Type
Original
Reference Types
Book
JPG
Reference Comments
"S.S. White Dental Catalog, Catalog-R", S.S. White Dental Mfg. Co., 1916, p. 7 (similar to outfit C3)
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