One of the First Rechargeable Batteries, about 1860
1860
Artificial right hand, Europe
1915-1925
Speech memory board from System X Automatic Announcement Subsystem, 1979-1985
1979-1985
Wheatstone printing telegraph, 1841
1841
Cryptograph (coding and decoding machine) by Sir Charles Wheatstone, 1843-1875
1843-1875
Lissen Headphones, 1922-1930
1921-1930
Embossed hip-flask
1801-1900
Penicillium Mould presented by Alexander Fleming
1935
Enema syringe
1701-1800
Prototype of the Brougham carriage
1838
recording moving iron ammeter
moving iron ammeter
1890-1900
kilowatt-hour meter (intermittent integrating type) by Holden
Evershed's portable ohmmeter no.20818
Chamberlain and Hookham DC ampere-hour meter
Model of a Froment motor with brush gear (incomplete)
Brush-Geipel automatic regulator
Siemens and Halske direct current indicating and integrating watt-hour meter
Edison cut-out and bolt switch
White porcelain ceiling rose with integral fuse
1896
Turnswitch with fuse (wire), c.1886 [lacks cover]
1886
Fused wall-fitting switch
Walker photographic recorder
Polythene brooch
1938
Unipivot galvanometer
potentiometer no.114 - 1890
Original Evershed meter
electricity meter, Aubert clock type, 1890
Portable moving coil voltmeter
1902
Dissecting microscope, c. 1750
1745-1755
Aeolipile, French 18th century
1700-1799
Aron watt hour, clock type meter
Hot-wire voltmeter
1893
Crompton potentiometer
Electric Construction Company mercury arc rectifier
Metal lice comb, 'Derbac' brand, England, 1930-1940
1930-40
Archibald V Hill’s thermopile used to measure heat production, England, 1950-1960
1950-1960
Reyrolle metal-clad 5A plug to BS 196
1955
potential Inductor stick made by Neo Electrical Industries Ltd.
1962
mercury motor type electricity supply meter by Ferranti
1884
Anatomical model of the spine
1901
Cuff type (scroll foot) microscope by James Mann, c. 1755
1750-1760
Modified form of John Marshall's Compound microscope
1725-1735
Electrodynamometer wattmeter no.217
Electricity supply meter, ampere/hour and prepayment
1906
Crompton 6" voltmeter no.179- c.1882, 0 - 300v.
circa 1882
Siemens electrodynamometer wattmeter (open instrument)
electrodynamometer voltmeter
Lord Kelvin's paralleling voltmeter
