Model of a Keil Trapezoid by Richard P. Baker, Baker #437
date: label: date made
content: ca 1906-1935
name: label: maker
content: Baker, Richard P.
notes: label: Description
content: This is a model of trapezoidal wedge, a surface with two triangular and three trapezoidal faces.Here two triangular faces and two trapezoidal faces of a wedge are shown in sheet metal. Two interior intersecting triangles that bisect the wedge and join opposite sides of the triangles are also shown in sheet metal - the trapezoidal face that would cover them is not shown. Wires rising from two edges of one of these bisecting triangles aand from the line of intersection of the bisectors form two sides and the diagonal of a parallelogram.
label: Description
content: Baker based this model on a diagram from a volume on dynamics by the German Eduard Study.
label: Description
content: References:
label: Description
content: Baker, R. P., <I>Mathematical Models</I>, Iowa City, Iowa, 1931, p. 16.
label: Description
content: Study, E., <I>Geometrie der Dynamen: Die Zusammensetzung von kräften und verwandte Gegenstände der Geometrie</I>, Leipzig: B.G. Teubner, 1901, esp. Figure 5 , p. 33.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Frances E. Baker
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.211257.088
label: catalog number
content: 211257.088
label: accession number
content: 211257
objectType: label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: beige (overall color)
label: Physical Description
content: soldered. (overall production method/technique)
label: Measurements
content: average spatial: 5.3 cm x 31 cm x 10.7 cm; 2 3/32 in x 12 7/32 in x 4 7/32 in