motor ?
Date1930-1960
Inventory Number1997-1-0288
ClassificationMotor
Subject
Maker
American
?
Cultural Region
Dimensionsmotor: 7.8 × 26.4 × 8 cm (3 1/16 × 10 3/8 × 3 1/8 in.)
blue board box: 10.8 × 30.2 × 13.7 cm (4 1/4 × 11 7/8 × 5 3/8 in.)
blue board box: 10.8 × 30.2 × 13.7 cm (4 1/4 × 11 7/8 × 5 3/8 in.)
Material
DescriptionAtop a thin rectangular metal base is a small black box, containing a coil. Atop the metal spool for the coil are two brass binding posts, to which bright green coily wires are connected. Half of the coil is surrounded by the poles of one pair of horseshoe magnets, and the other half surrounded by the poles of another. Within each of these pairs, the smaller magnet is nested in the larger. In each pair, a metal I-shaped bar cuts across both arms of both magnets halfway between the round end and the poles (the coil). Both pairs of magnets are screwed together at the poles by a rectangular piece of metal. Finally, both the magnets and the metal piece that connects them are electric (or should I say electro-magnetic) orange.
Signedunsigned
Philip Harris & Company, Ltd.
Date: circa 1950
Object number: 1997-1-0639
Henry Hughes & Son, Ltd.
Date: 1900-1915
Accessories: instruction manual for instrument is in box of disassembled parts.
Object number: DW0141j
Leeds & Northrup Company
Date: circa 1940
Object number: 0552
Leeds & Northrup Company
Date: circa 1927
Accessories: none
Object number: 0538
L. E. Knott Apparatus Company
Date: 1910-1930
Accessories: bell jar
Object number: 0189a,b
Edward Mills Purcell
Date: 1947
Accessories: Various pieces of apparatus separately cataloged as 2004-1-0408a-g through 2004-1-0416 were used with this magnet in different configurations for different experiments. The fairly large amount of documentation which accompanied this accession -- including student lab reports, bench notes, reprints, wiring diagrams, and other documents -- has been filed under 2004-1-0407.
Object number: 2004-1-0407
General Radio Company
Date: 1928-1932
Accessories: 3 bulbs; small vial with oil; 7 rectangular pieces with 2 dials and brackets (all in drawer)
Object number: RS0613
