Metal Detector
History of Metal Detector
- created by Alexander Graham Bell
- invented in 1881
- used an electromagnet to search for metal
An early metal detector
Fun Facts
- Bell used the first metal detector to search for the bullet lodged in President James Garfield but was unable to find the bullet
- Metal Detector was thrown off by metal springs in Garfield's bed
- could only detect metal up to a few inches
Impact On Second industrial Revolution
- had little impact on revolution due to its inefficiency
- had a bigger impact after revolution when it was patented and improved by Gerhard Fisher
Metal Detectors Today
- have become primarily handheld
- have a much longer range to detect metal
Attributions
Precision cat's whisker detector by Alfred Powell Morgan. Image is available for use in public domain
Metal Detector by en:RadicalBender. This image is available for use in the public domain.
Alexander Graham Bell by an unknown author. This image is available for use in public domain.