Ellipsograph

1977/018

Ellipsograph trammel in mahogany

SKU: 1977/018 Categories: ,

Description

Ellipsograph trammel in mahogany and box(?) comprising a cruciform groove (broken) and a beam with 3 wedged clamped bases two for the groove girder (one replacement) and one for the drawing point (replacement).

Used for drawing ellipses on plans.

JF Heather in “Mathematical Instruments” London 1884 commented that ellipsographs do not work satisfactorily and recommended using strips of paper as a construction aid for better results.

Additional information

Acquisition Number

1977/018

Item Type

Short Description

Ellipsograph

Manufactured by

Date of Manufacture

c. 1860

Sub-items

None

Supporting Items

None

Makers Number

None

Marks

Unmarked but with traces of manuscript ink on labels glued to beam and groove.

Dimensions (mm)

Beam: 860 (L) x 17 (W) x 11 (H). Cruciform runners: 585 (L) x 36 (W) x 20 (H). Weight 650 g.

Donor

Date Donated

December 1977

Materials

Mahogany

Condition

Good

Display Location