Semi-Elliptical Trammel with Case, by Joseph Jackson, London, Early 18th Century |
 |
| Inventory Number: | 30371
|
| Object Type: |
|
| Persons: |
Joseph Jackson |
| Date Created: |
|
| Place Created: | London United Kingdom (England) Europe
|
| Accession Number: | 1925-43
|
| Brief Description: | Semi-Elliptical Trammel and Fitted Wooden Case.
|
| Primary Inscriptions: | Signed, "Josph, Jackson London"
|
| Provenance: | Lent by Christ Church, Oxford in 1925.
|
| Collection Group: |
Orrery Collection |
| Dimensions: |
| Height |
Width |
Depth |
Diameter |
Unit |
|
470 |
|
|
mm |
|
Narratives |
|
Permalink: http://www.mhs.ox.ac.uk/object/inv/30371
Case for Semi-Elliptic Trammel |
|
|
| Inventory Number: | 30371
|
| Object Type: |
|
| Persons: |
Joseph Jackson |
| Date Created: |
|
| Place Created: | London United Kingdom (England) Europe
|
| Accession Number: | 1925-43
|
| Brief Description: | T-shaped wooden fitted case for Semi-Elliptical Trammel. Hinged lid with three metal hooks to fasten. Dovetail joints to corners. Four compartments to interior.
|
| Primary Inscriptions: | Written in ink inside lid "Bird's / Elliptical Trammel / Christ Church"
|
| Provenance: | Lent by Christ Church, Oxford in 1925.
|
| Collection Group: |
Orrery Collection |
| Dimensions: |
| Height |
Width |
Depth |
Diameter |
Unit |
|
470 |
|
|
mm |
|
Narratives |
|
Permalink: http://www.mhs.ox.ac.uk/object/inv/30371
Semi-Elliptical Trammel, by Joseph Jackson, London, Early 18th Century |
|
|
| Inventory Number: | 30371
|
| Object Type: |
|
| Persons: |
Joseph Jackson |
| Date Created: |
|
| Place Created: | London United Kingdom (England) Europe
|
| Accession Number: | 1925-43
|
| Brief Description: | English copper alloy elliptical trammel. Signed, "Josph, Jackson London"; undated. 18th century, before 1759. This is an instrument for drawing ellipses. One half of an ellipse is drawn at a time; the position of the instrument being reversed in order to draw the other half. The T-shaped base, along the arms of which slide the supports controlling the drawing-arm, is fitted with two needle-points to prevent the instrument moving while in use. Supplied with the instrument are a pencil-holder, a pen, and a 'dry line' point. In the holder into which these fit is a small spring so that even contact with the drawing surface is maintained. The holder has a fine screw-adjustment. Gunther (Early Science in Oxford, I, 138-9) quotes a letter from John Bird, the instrument-maker, to John Fanshawe, a Canon of Christ Church and Regius Professor of Divinity, which apparently refers to this instrument.
|
| Primary Inscriptions: | Written in ink inside lid "Bird's / Elliptical Trammel / Christ Church"
|
| Provenance: | Lent by Christ Church, Oxford in 1925.
|
| Collection Group: |
Orrery Collection |
| Dimensions: |
| Height |
Width |
Depth |
Diameter |
Unit |
|
470 |
|
|
mm |
|
Narratives |
|
Permalink: http://www.mhs.ox.ac.uk/object/inv/30371