DMM 62678

Museum: Deutsches Museum, Munich

Title: Sector by N. Bion

Inventory number: DMM 62678

Date: End of the 17. century/ beginning of the 18.

Material: Brass

Dimensions: Lenght of limb: 166 mm; width: 15 mm

Signature: "N. Bion AParis" ["A" merges with "P"].

Description: See Schneider, 1970, p. 87.

Preliminary examination of the metallic scales: The front presents a metallic line with 6 values. Planetary symbols on the metal scale, indicated as "Les Metaux". Two other scales, each on a face, when the sector is opened at 180 degrees, on the border. Called respectively "poids des boulets" and "Calibre des pieces". 

References: Schneider, Ivo: Der Proportionalzirkel: Ein universelles Analogrecheninstrument der Vergangenheit. Deutsches Museum: Abhandlungen und Berichte. 38. Jahrgang 1970, Heft 2. München, Düsseldorf 1970, p. 87.

Measurements of Scales (in mm)

"Les Metaux"

☉ [Sun, Gold]

 118

♄ [Saturn, Lead]

 140

☽ [Moon, Silver]

 145

♀ [Venus, Copper]

 152

♂ [Mars, Iron]

 158

♃ [Jupiter, Tin]

 162,5

"Calibre des pieces"

1/4 33
1/2 42
1  53
2 67
3 72
4 84
5 91
6 96
7 102
8 106,5
9 109
10 112
15 129,5
20 143
25 154
30 163
35 171,5
40 179,5
45 186,5
50 194
55 201
60 207
64 211

"poids des boulets"

1/4 32
1/2 40,5
1  51,5
2 65
3 74
4 82
5 87
6 92
7 98
8 102
9 105
10 108
15 123,5
20 136,5
25 148
30 157
35 165
40 172
45 179
50 186
55 193
60 198,5
64 204