- Subject
- Electronic instruments
- Makers
- Elliott Brothers
- Provenance
- Presented by the Marconi Corporation in 2003. Part of the Elliott Archive.
- Primary inscriptions
- Intrinsically marked: 'Sketch E.114.A.', 'A.D. 1903.', 'No 25578', and signed 'L. E G. 13/8/03.'.
- Physical material
- Paper
- Object type
- Electronic instrument
- Dimensions
- Height: 202mm Width: 336mm
- Inventory No
- 11980
- Accession Number
- 2003-11
Description
In Elliott Archive 2/36 part, volume of documents relating to patents. Blueprint for a frequency indicator invented by A. C. Heap, prepared to accompany the final specification of patent no.25578 (1902) ('Improvements in Electrical Instruments for indicating the frequency of the alternations in an alternate current circuit'), 1903. Drawings are horizontal format though intrinsic inscriptions are vertical format.
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