MAGNETIC SENSING PROXIMITY DETECTOR,申请号CA19880582718-传众专利搜索

MAGNETIC SENSING PROXIMITY DETECTOR

申请公布号：CA1304469(C)

申请号：CA19880582718

申请日期：1988.11.10

申请公布日期：1992.06.30

申请人：

CAMERON IRON WORKS USA, INC.

发明人：BAKER, GERALD S.

分类号：G01B7/14;G01B7/00;G01D5/06;G01V3/08;H01H36/00

主分类号：G01B7/14

摘要：The improved magnetic proximity detector of the present invention includes a tubular housing, a tubular magnet fixed in position within the housing, a first movable magnet within said housing at one end of said tubular magnet, a second movable magnet within the housing at the other and of the tubular magnet, an annular magnet position in surrounding relationship to the housing, means for adjusting the position of the annular magnet axially with respect to said housing, means connecting the first movable magnet and the second movable magnet, a switch including a blade, a first contact and a second contact, means connecting said first and second movable magnets to said blade so that movement of said first and second movable magnets moves said blade between contact with the first and second contacts, the first movable magnet having its poles arranged so that it is attracted to said tubular magnet, said second movable magnet having its poles arranged so that it is repelled by said tubular magnet, the nearness of a ferrous metal to the end of said housing containing said first magnet moving the two magnets and the blade to change the position of the switch, and the adjusting the position of said annular magnet changing the flux from the end of the housing containing the first magnet to adjust the distance at which a ferrous metal causes the change of position of the switch blade.