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Description
Early 20th century variable resistor box / decade box. Muirhead & Company - Westminster - No. 23694. Wood case with brass hardware.
"A decade box is a piece of test equipment that can be used during prototyping of electronic circuits to substitute the interchanging of different values of certain passive components with a single variable output. Decade boxes are made for resistance, capacitance, and inductance, the values of which can be adjusted incrementally by the turning of a knob or switch, with the contacts of the switch moving along a series of the respective components. The interface for these devices usually consists of dials or adjustable tape counters, and they are operated in-circuit and without any external power source." (Source: Wikipedia)
"Muirhead & Company Limited - Latimer Clark - Successors to William Marston Warden & Company, 27 Great George Street, Westminster, London; J Latimer Clark and John Muirhead Jnr were W M Warden’s technical advisors; later became Muirhead & Company, 1904 - manufacturer of electrical instruments, Elmers End." (Science Museum Group)
Condition
Good Overall - Gentle wear/tarnish
Dimensions
12.75" x 7" x 5.5" (Width x Depth x Height)