Model by Philip Malmberg, a Student of A.H. Wheeler, Cylinder Transformable into a Hyperboloid of One Sheet
- Description
- Joining points along the radius of two circles generates a family of straight lines. If the circles are at their maximum separation, the lines form a cylinder. When rotated, the circles approach and the surface becomes a hyperboloid of one sheet. Further rotation (not possible on this model) yields a double cone.
- String models with elegant brass frames sold for engineering and mathematics education sold from the nineteenth century (see 1985.0112.009). Philip Malmberg, a high school student of A. Harry Wheeler, made this inexpensive version of the surface. He used disks cut from a cardboard box, leftover spools from thread, a wooden dowel, a bit of wire, and thread. Census records indicate that Malmberg went on to work as a draftsman.
- For a photograph of Malmberg, see 1979.0102.308.
- Location
- Currently not on view
- date made
- 1927
- associated dates
- 1927-02-23
- teacher of maker
- Wheeler, Albert Harry
- maker
- Malmberg, Philip
- place made
- United States: Massachusetts, Worcester
- Physical Description
- paper (discs material)
- wood (spools, dowel material)
- thread (surface material)
- wire (spring material)
- white (overall color)
- brown (overall color)
- cut and glued (overall production method/technique)
- Measurements
- average spatial: 11 cm x 7.8 cm x 7.8 cm; 4 11/32 in x 3 1/16 in x 3 1/16 in
- ID Number
- MA.304723.501
- accession number
- 304723
- catalog number
- 304723.501
- Credit Line
- Gift of Helen M. Wheeler
- subject
- Mathematics
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Mathematical Association of America Objects
- Data Source
- National Museum of American History
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