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Terrestrial magnetic sensor

  • US 4,907,346 A
  • Filed: 12/07/1987
  • Issued: 03/13/1990
  • Est. Priority Date: 03/10/1987
  • Status: Expired due to Fees
First Claim
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1. A terrestrial magnetic sensor comprising:

  • a bobbin body having a magnetic core inserting groove,a silicon gel filled in the magnetic core inserting groove,a magnetic core buried in the silicon gel filled in the magnetic core inserting groove, anda bobbin cover for closing the magnetic core inserting groove of the bobbin body.

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