Accession No

3791

Brief Description

moving coil reflecting galvanometer, by J. Carpentier, French, 1905

Origin

France; Paris

Maker

Carpentier, J.

Class

electrical

Earliest Date

1905

Latest Date

1905

Inscription Date

Material

wood (mahogany and two others); metal (brass, steel, white metal); glass; cloth (felt, silk); plastic (ebonite and one other)

Dimensions

depth assembled 200mm; breadth 130mm; height 290mm

Special Collection

Provenance

Purchased from Peter Delehar, London, England, 1990.

Inscription

‘Ateliers Ruhmkorff
J. Carpentier
Ingr Constr Paris’ (brass plaque screwed into door)
‘6663-2’ (stamped into base)

Description Notes

Moving coil reflecting galvanometer, by J. Carpentier, French, 1905.

Suspended-coil reflecting galvanometer, Deprez-D’Arsonval type.
Mahogany case with hinged door and two brass hook fasteners; brass carrying handle and base threaded for tripod attachment. 3-element laminated U-shaped vertical magnet. Suspended coil surrounding fixed iron tube into which retreat two clamps for securing the coil when not in use. Mirror and suspension wire (adjustable by brass screw) above coil, spring beneath. Screw-operated switch for introducing resistance coil into circuit. Brass plumb line in door. 2 brass terminals with holes through case for wires from thermocouple. Oil lamp and microscope stored in inside of door and can be screwed into outside of case. These are for reading spot’s position on internal scale, which is divided 0 - 12, numbered by 1, subdivided to 0.1.

Condition good; complete

References

Events