DMM 68220T015

Museum: Deutsches Museum, Munich

Title: Sector by Pierre Le Maire

Inventory number: DMM 68220T015

Signature: "Le Maire fils AParis"

Date: Middle of the 18. century

Material: Brass

Dimensions: Lenght of limb: 168 mm; width: 16 mm.

Description: See Schneider, 1970, p. 89. 

Preliminary examination of the metallic scales: 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 "Calibres des pieces" (side of the metallic line) and "Poids des boulets" (other side). Good manufacturing. 

References: Schneider, Ivo: Der Proportionalzirkel: Ein universelles Analogrecheninstrument der Vergangenheit. Deutsches Museum: Abhandlungen und Berichte. 38. Jahrgang 1970, Heft 2. München, Düsseldorf 1970, p. 89.

Measurements of Scales (in mm)

"Les Metaux"

☉ [Sun, Gold]

 117

♄ [Saturn, Lead]

 138

☽ [Moon, Silver]

 143

♀ [Venus, Copper]

 149,5

♂ [Mars, Iron]

 155

♃ [Jupiter, Tin]

 160

"Poids des boulets"

1/4 32,5
1/2 40,5
3/4 46,5
1 51
2 64
3 73,5
4 80,5
5 87
6 92,5
8 102
10 109,5
12 116
14 122
16 128
18 133
20 138
22 142
24 146
27 152
30 157
33 163
36 167,5
40 173
48 184,5
55 193
60 198,5
64 203

"Calibres des pieces"

1/4 34
1/2 43
3/4 49
1 54
2 67
3 77
4 84
5 90
6 96
8 106
10 114
12 121
14 127
16 133
18 138,5
20 143
22 148
24 152
27 158
30 164
33 169
36 174
40 180
48 191,5
55 200
60 205,5
64 211