Gramme ring electric motor, used at Rowntrees, York, to drive a fan.1/2H.P, 230 Volts D.C, and probably made in 1985. Has a long driving shaft, fits through bridge support for the two circular magnet coils. Gramme ring armmature beyond, with contacts at far end. fitted with carbon brushes. Grease lubrication by screwdown caps. Painted black. Manufacturer unknown gramme ring motor
Oscilloscope type 561A serial no.100506 by Tektronix Guernsey Ltd., CI. Oscilloscope type 561A serial no.100506 by Tektronix Guernsey Ltd.
moving coil galvanometer made by Elliott Bros Ltd, in England, United Kingdom, 1928 moving coil galvanometer made by Elliott Bros Ltd
Crookes' tube by which an image of the cathode is produced on the glass Crookes' tube by which an image of the cathode is produced on the glass