. Automotive industries . tiomi tei • i p ii i agnets 222 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE February 3, 1921. Upper -Forming machine and hardening department. A magnet just farmed is seen within the circle marked on the forming machine in the foreground. Lower—Machine used for grinding off ends of mag-nets. This is a snefnee grinder mid has n eajiaeitg of magnets per dag February 3, 1921 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE 223 Magnetizing is accomplished on each magnet individ-ually, the horseshoe being placed in a double coil mag-netizing device, which is provided with an armature at
. Automotive industries . tiomi tei • i p ii i agnets 222 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE February 3, 1921. Upper -Forming machine and hardening department. A magnet just farmed is seen within the circle marked on the forming machine in the foreground. Lower—Machine used for grinding off ends of mag-nets. This is a snefnee grinder mid has n eajiaeitg of magnets per dag February 3, 1921 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE 223 Magnetizing is accomplished on each magnet individ-ually, the horseshoe being placed in a double coil mag-netizing device, which is provided with an armature at oneend. When the magnet is in position a switch is closedmomentarily. After the magnetizing process, each magnet is subjectedto a test to show its magnetic strength, and any magnetnot showing at least 20,000 magnetic lines is either re-magnetized or rejected. The test is made by means ofan induction coil connected to a ballistic coil is wound on a rectangular frame, so arrangedthat the magnet can be inserted and quickly withdrawal of the magnet causes the coil to be cutby
Size: 1397px × 1788px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
