|Person:||Mather, John Cecil (P)|
|Internal Links:||Analogrechner, Nomogramm|
|Link to the patent office:|
| GB191502668 |
Aus der Patentschrift GB191502668
"Proportional calculators comprise a sheet of paper, cloth, or metal having a number of radial lines enclosed in a square, as shown in Fig. 1, on which is superposed a transparent sheet, upon which is drawn a square of the same size divided by a number of horizontal and vertical lines, as shown in Fig. 2; the top and bottom lines of this square are graduated from 0-1000 or to any other convenient scale. ..."
- DATUM: 21.02.1916
- TITEL: Proportional Calculator.
- PERSON: MATHER JOHN CECIL