- Brief Description
- The only known example of Thomas Carwitham's 1723 design of an instrument for special-purpose architectural drafting. Two sectoral plates slide out from the main body to enable the fluting of classical columns and pilasters to be drawn in proportion.
- Item type
- Object
- Makers
- Thomas Heath
- Provenance
- Presented by Howard Dawes.
- Primary inscriptions
- "Tho: Heath Fecit.". On the sliding plates: "F. ye Flut.s of a Col.n in Plano", "For ye 7 Flut.s in a Pillas.r", "F. ye Flut.s in a Col.n Geom.l" and "F. m.t in a Module of a Col.n"
- Object type
- Drawing instrument
- Dimensions
- Height: 2mm Width: 118mm Depth: 67mm
- Inventory No
- 18805.1.2
Description
Brass plate with two hinged sectors which swing out from the main body. The instrument follows the design of the painter and draughtsman Thomas Carwitham in his The Description and Use of an Architectonick Sector (1723). On the fixed part of the signed side are 60 inches divided into equal parts, from 1 to 60. The sectoral scales on this side are for minutes in a column module (0-60) and for flutes in a column (0-48). The fixed part of the reverse has a diagonal scale for the "Decimal part of a foot Inch & parts" and a scale for "An Inch & parts Divided in 12 E.P." (ie equal parts). The sectoral scales here are for the flutes of a column "in plano" (0-48) and for the 7 flutes in a pilaster" (0-29).
Related Items
More related items- Architectonic Sector to the Design of Thomas Carwitham, by Thomas Heath, London, 1720-30Inventory Number 18805.1.3
Architectonic Sector (Carwitham Pattern), by Thomas Heath, London, c. 1720-30Inventory Number 25362- Architectural Protractor to the Design of William Halfpenny, by Thomas Heath, London, c. 1728Inventory Number 18805.1.4
- Architectural Protractor to the Design of William Halfpenny, by Thomas Heath, London, c. 1728Inventory Number 18805.1.5