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dental auto-mallet

https://mhc.andornot.com/en/permalink/artifact13403
Dates
1943
1950
circa 1943-1950
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020281 a-k
Description
McKenzie automatic amalgam condenser; clear rectangular plastic holder (a) with spaces for handpiece, condenser points; silver metal handpiece (b) with specially-designed black metal latch over tip; concentric ridged circles along bottom half, before cylindrical handpiece curves at a slight angle, …
  4 images  
Accession Number
010020281 a-k
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dental Instruments
MM= Dentistry, Operative -- mallet
Description
McKenzie automatic amalgam condenser; clear rectangular plastic holder (a) with spaces for handpiece, condenser points; silver metal handpiece (b) with specially-designed black metal latch over tip; concentric ridged circles along bottom half, before cylindrical handpiece curves at a slight angle, ending with a round opening; six silver metal condenser points fit into handpiece; one with curved end (c), one with oval end (d), one with flaring round, flat end (e), one with rounded, circular end (f), two with flat, round ends (g, h); two cylindrical driving cams (i, j) hold points in handpiece; white rectangular instruction sheet (k), printed with black ink on one side, states product's advantages, parts and directions
Number Of Parts
11
Part Names
a - holder - Size: Length 9.3 cm x Width 3.1 cm x Depth 0.9 cm
b - handpiece - Size: Length 8.2 cm x Width 1.5 cm x Depth 1.0 cm
c - condenser point - Size: Length 1.7 cm x Width 0.4 cm x Depth 0.2 cm
d - condenser point - Size: Length 1.7 cm x Width 0.3 cm x Depth 0.2 cm
e - condenser point - Size: Length 1.7 cm x Diam. 0.3 cm
f - condenser point - Size: Length 1.7 cm x Diam. 0.2 cm
g - condenser point - Size: Length 1.7 cm x Diam. 0.2 cm
h - condenser point - Size: Length 1.7 cm x Diam. 0.2 cm
i - cam - Size: Length 0.5 cm x Diam. 0.2 cm
j - cam - Size: Length 0.5 cm x Diam. 0.2 cm
k - sheet - Size: Length 27.9 cm x Width 9.2 cm x Depth 0.1 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Maker
Facility Products
Site Made (City)
Miami
Site Made (State)
Florida
Site Made (Country)
United States of America
Dates
1943
1950
circa 1943-1950
Date Remarks
Based on patent date
Material
metal: silver, black
plastic: clear
paper: white
ink: black
Inscriptions
(b) Engraved near bottom: "THE DENTAL SPECIALTY MFG. CO"
Permanent Location
(a-j): Storage Room 0010
0010-B
(k): Storage Room 2005
2005-2-5 Box 22
Condition Remarks
Sheet (k) is worn at edges, folds; metal on (b) tarnished
Copy Type
Original
Reference Types
Person
Internet
JPG
Reference Comments
James G. Brass; "Free Patents Online" website
CD #1
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 was donated by Dr. James G. Brass from Comox, British Columbia; his father was a classmate of the inventor of this product, Olin G. McKenzie, at Northwestern University in the late 1930s; this item was patented in 1943; its primary objective was to provide a simple and efficient plugger construction which can be used in an ordinary drilling handpiece, specifically only with a change in the latch, not the handpiece itself
Images
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