electromagnetic apparatus
Date1890-1930
Inventory Number1998-1-0762
ClassificationElectromagnetic Apparatus
Subject
Maker
American
?
Cultural Region
Dimensionseach: 3.5 × 10 × 15.5 cm (1 3/8 × 3 15/16 × 6 1/8 in.)
Material
DescriptionTwo (nearly) identical arrays. Each is made up of two braces -- rectangular, with a broad shallow arc cut out of the bottom -- and five white spools.
Each brace has one metal L-shaped component near each outside corner. These components are screwed into the braces; they are not screwed into a presumed base. Each brace also features a row of five holes corresponding to the five spools.
Each spool is made up of thirteen white discs connected in a line. Several (if not all) of them contain an aligned slit. The 'first' disc in each is numbered in pencil on 'top'. (The numbering starts at 1 and goes up to 9, with the last spool's number is not visible.) Many of the discs are slightly discolored. Some have light brown patches, and some darker ones. Connecting the discs is an axle-like rod, which runs through the holes in both braces. (On both sides of both holes are nuts to keep the spools in place.)
Thin bare wires are soldered in place so as to connect a nut on one brace to the next nut on the other.
Each brace has one metal L-shaped component near each outside corner. These components are screwed into the braces; they are not screwed into a presumed base. Each brace also features a row of five holes corresponding to the five spools.
Each spool is made up of thirteen white discs connected in a line. Several (if not all) of them contain an aligned slit. The 'first' disc in each is numbered in pencil on 'top'. (The numbering starts at 1 and goes up to 9, with the last spool's number is not visible.) Many of the discs are slightly discolored. Some have light brown patches, and some darker ones. Connecting the discs is an axle-like rod, which runs through the holes in both braces. (On both sides of both holes are nuts to keep the spools in place.)
Thin bare wires are soldered in place so as to connect a nut on one brace to the next nut on the other.
Signedunsigned
Inscribedon coils, hand-written: [all coils are numbered from 1 to 10]
Curatorial Remarkson the tag: "Shallerass XR5 no 685"
on the back of the tag: Position center
FunctionWithin both of these arrays, the spools (and hence the wires coiled around them) are set up in series. Also, if the user so willed, the arrays could be similarly set up. This device's function is not known.
F. F. Metzger
Date: circa 1927
Accessories: wooden box lined with velvet cushioning;
strain gauge;
iron bar;
steel rod contact points (2);
nails (3) wrapped in paper;
manual;
single stationery paper;
pamphlet (price list)
Object number: 1999-1-0065
Jean-Gabriel-Auguste Chevallier
Date: 1830-1848
Accessories: cork-like wooden object; wooden case
2 wooden "fins" (possibly part of case)
4 mounting screws
1 small brass mounting object
1 brass key-like object
Object number: 1998-1-1248
F. F. Metzger
Date: 1905-1930
Accessories: steel contact points (4);
strain gauges (2);
square bars (2);
dial gauge
Object number: 1999-1-0083
Benjamin Martin
Date: 1764
Accessories: small brass scope with brass and ivory holder.
Object number: 0007
F. F. Metzger
Date: early 20th Century
Accessories: brown leatherbound wood case with purple stuffed velvet lining two metal locks in front;
steel rod contact points (4);
metal bar;
strain gauge;
card describing gauge ratio
Object number: 1999-1-0084
