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Du Bois-Reymond induction coil

Du Bois-Reymond induction coil

1959

Wall switch

Wall switch

1900-1910

Rectangular application electrode, European, 1900-1910

Rectangular application electrode

1900-1910

Potentiometer, switches and circuit breaker for electric motor, by Electric and Ordance Accessories Co. Ltd., Birmingham, 1904

Potentiometer, switches and circuit breaker for electric motor

1904

Wood-encased clock with brass time switch mounted in glass case above, part of the "Early Morning Waiter" automatic tea-making machine invented and built by Ron Grumble, London, 1930

Wood-encased clock with brass time switch mounted in glass case above

1930