Screw jack
Datelate 19th-mid 20th Century
Inventory Number1996-1-0558
ClassificationMetal fittings
Subject
Maker
American
?
Cultural Region
Dimensions18 x 3.6 cm (7 1/16 x 1 7/16 in.)
Material
DescriptionA metal fitting, perhaps a screw jack, of unknown purpose.
The item consists of a metal rod, angled to a blunt point at one end and threaded at the other end. The threading is 20 TPI.
Above the threaded section, a circular brass piece is threaded onto the rod. At the other end, a circular hole has been bored into the end below the point.
The item consists of a metal rod, angled to a blunt point at one end and threaded at the other end. The threading is 20 TPI.
Above the threaded section, a circular brass piece is threaded onto the rod. At the other end, a circular hole has been bored into the end below the point.
Signedunsigned
Curatorial Remarks1/2" rod with 20 TPI thread and large brass disc/ nut
FunctionUnknown function.
Keuffel & Esser Company
Date: mid 19th-late 20th Century
Accessories: twelve rods with two bolts and one washer; three plates
Object number: 1997-1-1727
American
Date: mid 20th-late 20th Century
Accessories: has ruler markings on it, and on the sliding part (which is pulled by a pulley-rope system)
Object number: 1997-1-0039b
American
Date: mid 20th-late 20th Century
Object number: 1997-1-0039a