Hoffman fixed-bar screw compressor, also known as a Hoffman screw clamp, which consists of a central threaded solid cylindrical piece of metal with a round flat piece on top and a metal bar at the bottom that is flat on its bottom and rounded at the sides; the screw up/down piece fits between two c…
Hoffman fixed-bar screw compressor, also known as a Hoffman screw clamp, which consists of a central threaded solid cylindrical piece of metal with a round flat piece on top and a metal bar at the bottom that is flat on its bottom and rounded at the sides; the screw up/down piece fits between two cylindrical side bars and flat bars at the top and bottom that have rounded outside edges; the screw piece moves up and down; when in the down position the bottom of the screw piece and the bottom flat bar fit tightly together
Number Of Parts
1
Provenance
Originally owned and used by Dr. Garfield Dormer, who was the first to specialize in gums in Ottawa; Dr. Dormer was cousin to donor D.G. Mike Willis; this screw compressor arrived in the box with the dental syringe 998.012.002a-o
Material
metal: grey; brown
Permanent Location
Storage Room 0010
0010-D5-10
Dimension Notes
Length 3.0 cm. x Width 3.0 cm. x Depth 0.9 cm.
Condition Remarks
The screw compressor moves up and down when turned, but most of the outside surface areas show corrosion; #2: metal is rusty; #3: corrosion present.
Copy Type
Original
Reference Types
Book
Reference Comments
"Hospital and Physicians Equipment and Supplies," by The J.F. Hartz Company Limited, 1960, p. 251; Catalog 30 by American Hospital Supply - Division of AHSC (Canada) Ltd., 17314-17628; (17314-004); "Illustrated Catalog of Standard Surgical Instruments," by Codman & Shurtleff, 1920, p. 116 (item 4498)