Ammeter Wattmeter for an alternative use for this instrument. Moving iron ammeters use a piece of iron which moves when acted upon by the electromagnetic force of a fixed coil of wire. The moving-iron meter was invented by Austrian engineer Friedrich Drexler in 1884. This type of meter responds to both direct and alternating currents (as opposed to the moving-coil ammeter, which works on direct current only). The iron element consists of a moving vane attached to a pointer, and a fixed vane, surrounded by a coil. As alternating or direct current flows through the coil and induces a magnetic field
Jim Measures Jim Measures James Measures (born 14 April 1939), also known by the nickname of "Jim", is an English former professional rugby league footballer who played in the 1950s and 1960s. He played at representative level for Great Britain, and at club level for St Helens, Widnes and the Rochdale Hornets, as a , i.e. number 11 or 12, during the era of contested scrums. Measures was born in St. Helens, Lancashire, England. Jim Measures won caps for Great Britain while at Widnes in 1963 against Australia (2 matches). Jim Measures played left-, i.e number 11, in Widnes' 13-5 victory over