Leeds & Northrup L&n 2420b Galvanometer

US $2700

  • Newhall, California, United States
  • Feb 22nd
YOU ARE BIDDING ON A LEEDS AND NORTHRUPCO. PORTABLE D-ARSEONVALTYPE MOVING COIL REFLECTING GALVENOMETER, CAT. # 2420 B USED FOR DETECTING & MEASURING ELECTRIC CURRENT. MADE IN PHILADELPHIA PA BETWEEN 1938 & 1946. THE TOP OF THE BOX OPENS UP AND INSIDE IS A HORSESHOE MAGNET LYING HORIZONTALLY, AND A LIGHT COIL ASSEMBLY WITH A PIVOTABLE MIRROR SUSPENDED BETWEEN THE POLES OF THE MAGNET. THIS TYPE OF GALVENOMETER OPERATES BY  MEANS OF A COIL OF WIRE SUSPENDED FROM A TINY METAL RIBBON. THE LIGHT SYSTEM INCLUDES A LIGHT BULB AND LENS ASSEMBLY. THE LIGHT AND MIRROR ASSEMBLY REFLECT A LIGHT BEAM ON TO A FROSTED GLASS PANEL MARKED WITH A SCALE GRADUATED IN MILLIMETERS. COIL RESISTANCE IS 26 OHMS. WORKING CONDITION UNKNOWN (I DON'T KNOW HOW TO TEST IT). BUYER PAYS $20 SHIPPING IN CONTINENTAL U.S. 

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