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dental anaesthesia unit

https://mhc.andornot.com/en/permalink/artifact13115
Dates
1920
1940
circa 1920-1940
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
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…
  1 image  
Accession Number
010020026 a-f
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dentistry, Operative -- instrumentation
Ventilators, Mechanical
Anesthesiology, instrumentation
MM= Anesthesia, Inhalation -- machine
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, 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)
Maker
Heidbrink Division, The Ohio Chemical Mfg. & Co.
Site Made (City)
Minneapolis
Site Made (State)
Minnesota
Site Made (Country)
United States of America
Dates
1920
1940
circa 1920-1940
Date Remarks
Based on supplier's catalogue
Material
metal: brown, silver
enamel: black, blue, green, yellow, red
rubber: black
plastic: black
fabric: beige, purple
paper: white
ink: black, blue, green
Inscriptions
(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
Images
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Junior Hagman Balancer dental articulator

https://mhc.andornot.com/en/permalink/artifact13757
Dates
1934
1944
circa 1934-1944
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020550
Description
Metal and brass Junior Hagman Balancer dental articulator consists of central metal support hinged at centre leading to a slight curve with a separate metal rod attached with an elongated hexagonal base; adjust the angle of the upper part of the balancer.
  5 images  
Accession Number
010020550
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dental Impression Technic
Dental Articulators
Denture, Complete
Dental Instruments
Description
Metal and brass Junior Hagman Balancer dental articulator consists of central metal support hinged at centre leading to a slight curve with a separate metal rod attached with an elongated hexagonal base; adjust the angle of the upper part of the balancer.
Number Of Parts
1
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa).
Maker
Hagman Balancer Co.
Site Made (City)
Minneapolis
Site Made (State)
Minnesota
Site Made (Country)
United States of America
Dates
1934
1944
circa 1934-1944
Date Remarks
Date based on research
Material
metal: brown, grey
plaster: white
Permanent Location
Storage Room 0010
0010-B
Dimension Notes
Length 12.3 cm x Width 11.5 cm x Depth 18.2 cm
Condition Remarks
Metal tarnished and finish has worn off in areas; white plaster residue on the upper and lower plates; shows wear
Copy Type
Original
Reference Types
Internet
Reference Comments
"Dental Branch Articulator Archives" website
Research Facts
This is the 'Junior Balancer' model that was introduced in 1934 and was smaller, simpler, and less expensive of the 'Deluxe' and 'Senior' models; casts were directly mounted to the instrument; usually there were two attachments that could be added to the Junior Balancer, the Occlusal Arc Guide and the Flat Plane Guide. Hagman designed the instrument according to his belief that the mandible functioned in an arc from centric relation. 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.
Images
Less detail