miscellaneous metal objects with sliding parts
Datemid 20th-late 20th Century
Inventory Number1997-1-0039b
ClassificationMetal fittings
Subject
Maker
American
?
Cultural Region
Dimensions2 x 58.8 x 2 cm (13/16 x 23 1/8 x 13/16 in.)
Material
Accessorieshas ruler markings on it, and on the sliding part (which is pulled by a pulley-rope system)
DescriptionA rectangular metal bar with a sliding sleeve. On one side, the bar is marked in increments of 1-40 (centimeters). The metal sleeve moves along the bar, controlled by a wire attached at each end. The wires are attached to the sleeve by a pair of slot-headed screws. At each end of the bar the wire is attached to a pulley inset into the bar. The sliding sleeve has a vernier scale (1-10).
At one end, a circular adjustment knob with a knurled edge controls the motion of the wire. The other end has a threaded rod with a spring and screw assembly of unknown function.
At one end, a circular adjustment knob with a knurled edge controls the motion of the wire. The other end has a threaded rod with a spring and screw assembly of unknown function.
Signedunsigned
FunctionUnknown. Vernier on sliding sleeve indicates it is a high-precision device.
American
Date: mid 20th-late 20th Century
Object number: 1997-1-0039a
American
Date: early 20th-late 20th Century
Accessories: Items are stored in a paper bag with the word "Fraction" written on it.
Object number: 1997-1-0187
Gebrüder Haff
Date: circa 1960
Accessories: black storage case
two white cards with conversion tables inside case
Object number: 1997-1-2000
G. Coradi
Date: circa 1911
Accessories: conversion table on white card in instrument case; instrument case
Object number: 1999-1-0068
Fabre et Cie
Date: circa 1856
Object number: 5469
Adrien Gavard
Date: circa 1860
Accessories: hinged mahogany case with original trade label; extra arm; writing implements; instrument weights; small ivory wheels with brass frames
Object number: 1997-1-1856
Central Scientific Company
Date: circa 1940
Accessories: 2 Leyden condensers made of Pyrex
One rubber **gutta percha?** pulley, rotted.
Object number: 1997-1-0634