Made by The Edison and Swan Electric Light Company Limited

Electro Convulsive Therapy (ECT) machine made in the early 1940s by Edison Swan Co. Ltd. to the specifications of W Grey Walter and used at the Burden Neurological Institute. Designed to give an electrical stimulus from the AC mains supply at a voltage varying from 60 to 150 volts, for a short preset period of time of typically 0.2 seconds. Use of this machine was discontinued in the 1970s. Serial no. SS35. Edison Swan labels appear to be apinted over. GRS stamped on one of the electrodes

Electroconvulsive therapy machine

1940-1945

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Electroconvulsive therapy machine

"Q and I" detector, Edison and Swan

Fleming Oscillation Valve

Royal 'Ediswan' Christmas-tree lamp outfit

1000 candle power 'Pointolite' electric Lamp

Miner's Safety Electric Lamp, 1886

Fleming Oscillation Valve

Fleming diode

'Royal Ediswan' metal filament lamp

1000 Watt 220 volt 'Royal Ediswan' gas filled electric Lamp

Cardew's voltmeter, patent, no. 147 (Ediswan)

100 candle power 'Pointolite' electric Lamp

Deflectional electro-dynamometer, portable

60 Watt 220 volt 'Royal Ediswan' gas filled electric Lamp

Fleming diode base

Fleming diode

Blowing iron, c. 1928

Blowing iron, c. 1928

Power cable for electroconvulsive therapy machine

E.H.T. Rectifier type 68508

Ediswan AT.50 triode valve, McVitie Weston valve collection, 1906-1957

Electroconvulsive therapy machine

Fleming diode

Pointolite high intensity microscope lamp

Two blowing irons, c. 1928

Edison and Swan 16cp carbon filament lamp

Transformer with Bar