Studied from its original page
Slotted interlocking-card surface model
cardboard curve-sheet model (Brinton) · egg-crate model
- Made by
- E. S. Farwell (data), via the American Machinist; described by Willard C. Brinton
- Year
- by 1914
- Field
- Physical objects
- Kind
- Physical object
- Room
- Values across a surface
Not shown here: its rights are not cleared
See the original page — Fig. 236, printed p. 335 (archive leaf n354)
Test A passes (published 1914) but test B fails: the page is Brinton's book and he died in 1957 (B would run to 2027).
The data it needs
xindependent · quantitative · per cent outlet openingyindependent · quantitative · revolutions per minutezvalue · quantitative · per cent efficiency
Built in 4 steps, as its maker described
not located; known only from Brinton's credit line under Fig. 236
6 other forms share this skeleton
Source
Brinton 1914, Graphic Methods for Presenting Facts, Fig. 236
Attribution less certain: contested, or no single inventor recorded