manual key reaction
Datecirca 1892
Inventory NumberWJ0180
ClassificationKey
Subject
Maker
American
Cultural Region
Dimensions4.3 x 5.2 x 16 cm (1 11/16 x 2 1/16 x 6 5/16 in.)
Material
DescriptionRectangular in shape, the base of the instrument has four holes in order to fix it down on a surface. The key is padded in plastic and electrical connectors relay the key's signal to a clock. The height of the connectors under the key can be adjusted to vary the amount of pressure necessary to transmit or interrupt the electrical signal.
In Collection(s)
Signedunsigned
Inscribedunder instrument: PAT. / MAY 31, 92 / 5298
FunctionElectrical device used in reaction time studies.
American
Date: circa 1901
Accessories: watchcase receiver
Object number: 1990-1-0001
Laboratoire de Physique, Faculté Libre de Lille
Date: circa 1885
Object number: DW0092
J. H. Bunnell & Company
Date: late 19th-early 20th Century
Object number: 1998-1-1695
Jefferson Physical Laboratory, Harvard University
Date: mid 19th-mid 20th Century
Object number: 1997-1-0598