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Actions	A Harrington’s Improved Clockwork Drill – The Erado, 1864 Remove from selection Add to selection Object numberHC.J.7.X.5 TitleA Harrington’s Improved Clockwork Drill – The Erado, 1864 DescriptionHarrington's clockwork 'Erado' drill. Harrington’s clockwork device for preparing cavities. When wound, this revolved by means of a powerful spring acting on cog-wheels. In its original walnut veneered velvet-lined case, which also contains a straight and a right-angled holder for burs and drills: with a key for operating the mechanism. Designed and made by George Fellows Harrington, this was the first drill to allow continuous rotation. It has been proposed that examples of the drill with elaborate engraved casings were made as presentation, or demonstration models. Production date 1864 Production periodNineteenth century, mid SubjectDental instruments Object nameDrill Object categoryDental Dimensions Length: 15.00 cm Width: 9.00 cm Diameter: 7.00 cm Key Length: 5.00 cm Width: 6.00 cm Depth: 1.25 cm Box Length: 9.00 cm Width: 12.50 cm Depth: 13.50 cm

Object numberHC.J.7.X.5

TitleA Harrington’s Improved Clockwork Drill – The Erado, 1864

DescriptionHarrington's clockwork 'Erado' drill. Harrington’s clockwork device for preparing cavities. When wound, this revolved by means of a powerful spring acting on cog-wheels. In its original walnut veneered velvet-lined case, which also contains a straight and a right-angled holder for burs and drills: with a key for operating the mechanism. Designed and made by George Fellows Harrington, this was the first drill to allow continuous rotation. It has been proposed that examples of the drill with elaborate engraved casings were made as presentation, or demonstration models.

Production date 1864

Production periodNineteenth century, mid

SubjectDental instruments

Object nameDrill

Object categoryDental

Dimensions

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