induction coil
Datecirca 1859
Inventory Number0502
ClassificationInduction Coil
Subject
Maker
Heinrich Daniel Ruhmkorff
1803 - 1877
Cultural Region
Place of Origin
Dimensions8.5 × 21.5 × 9.8 cm (3 3/8 × 8 7/16 × 3 7/8 in.)
Material
Bibliography
DescriptionA small simple winding double coil, insulated in green thread, with rubber end pieces, is mounted on a board. The two high tension connectors are upright from one of the rubber ends. The hammer-style contact breaker is on the other end, making and breaking as it is attracted to the iron wire core.
From Instrument Card: "A small bobbin, probably of simple winding, around hard rubber square ends, on which is located the "high" terminals. Mounted on a rectangular piece of wood."
From Instrument Card: "A small bobbin, probably of simple winding, around hard rubber square ends, on which is located the "high" terminals. Mounted on a rectangular piece of wood."
Signedstamped on base: RUHMKORFF / A PARIS
FunctionFor the demonstration of and experimentation with high voltages and the sparks they produce. This device includes a vibrator which intermittently opens and closes the circuit for the continuous supply of very high voltages and sparks. Frequently used to power discharge tubes.
ProvenancePrivate donor.
Heinrich Daniel Ruhmkorff
Date: 1850-1870
Object number: DW0852
Daniel Davis, Jr.
Date: circa 1848
Accessories: battery (0566b); pair of shock handles (0566c,d)
Object number: 0566a
