DMM 18760
Museum: Deutsches Museum, Munich
Title: Sector by Michael Butterfield
Inventory number: DMM 18760
Signature: "Buterfield AParis" ["A" merges with "P"]
Date: Between 1635 - 1724
Material: Brass
Dimensions: Lenght of limb: 165 mm; width: 15 mm.
Description: See Schneider, 1970, p. 88.
Preliminary examination of the metallic scales: Very rough manufactured. Planetary symbols on the metal scale, indicated a "Les Metaux". Two other scales, each on a face, when the sector is opened at 180 degrees, on the border. Called respectively "poides des boulets" [sic] and "Calibre des pies" [sic].
Very similar to Bion DMM 62678 and DMM 63898, but note that that in DMM 62678 and DMM 63898 the scale "Poids des boulets" is on the same side of the scale of metals, while in DMM18760 the "Calibre des pies" is on that side.
References: Schneider, Ivo: Der Proportionalzirkel: Ein universelles Analogrecheninstrument der Vergangenheit. Deutsches Museum: Abhandlungen und Berichte. 38. Jahrgang 1970, Heft 2. München, Düsseldorf 1970, p. 88.
Measurements of Scales (in mm)
"Les Metaux"
☉ [Sun, Gold] |
117 | |
♄ [Saturn, Lead] |
139 | |
☽ [Moon, Silver] |
144 | |
♀ [Venus, Copper] |
150 | |
♂ [Mars, Iron] |
156 | |
♃ [Jupiter, Tin] |
160 |
"Calibre des pies"
1/4 | 33 |
1/2 | 42 |
3/4 | 48 |
1 | 53 |
2 | 66 |
4 | 84 |
6 | 96 |
8 | 106 |
10 | 114 |
15 | 120,5 |
20 | 133 |
25 | 139 |
30 | 148 |
35 | 158 |
40 | 164 |
45 | 181 |
50 | 192 |
55 | 200 |
60 | 211 |
"poides des boulets"
1/4 | 31 |
1/2 | 40 |
3/4 | 45 |
1 | 51 |
2 | 64 |
4 | 80 |
6 | 92,5 |
8 | 11,5 |
10 | 109 |
15 | 114 |
20 | 128 |
25 | 138 |
30 | 146 |
35 | 152 |
40 | 163 |
45 | 173 |
50 | 184 |
55 | 192 |
60 | 202 |