DMM 53733
Museum: Deutsches Museum, Munich
Title: Sector
Inventory number: DMM 53733
Date: To be established.
Material: Brass
Dimensions: Lenght of limb: 115 mm; width: 12 mm.
Description: See Schneider, 1970, p. 90.
Preliminary examination of the metallic scales: Planetary symbols on the metal scale, indicated as "les Metaux". Lead symbol is absent, but the scal line is present. Engraving is very poor. Two other scales, each on a face, when the sector is opened at 180 degrees, on the border, with no titles. These two scales have very few values, compared to other sectors. Overall, it looks like a cheap instrument.
References: Schneider, Ivo: Der Proportionalzirkel: Ein universelles Analogrecheninstrument der Vergangenheit. Deutsches Museum: Abhandlungen und Berichte. 38. Jahrgang 1970, Heft 2. München, Düsseldorf 1970, p. 90.
Measurements of Scales (in mm)
"les Metaux"
☉ [Sun, Gold] |
78 | |
[lead, symbol is absent] | 92 | |
☽ [Moon, Silver] |
96 | |
♀ [Venus, Copper] |
100 | |
♂ [Mars, Iron] |
104 | |
♃ [Jupiter, Tin] |
108 |
Scale on the side of the metallic line
4 | 71,5 |
8 | 92,5 |
12 | 108 |
16 | 119,5 |
24 | 138 |
Scale on the other side
4 | 69,5 |
8 | 90 |
12 | 105 |
16 | 117 |
24 | 135 |