Temperature sensor for measuring the temperature of an engine

Claim 1

A temperature sensor for measuring the temperature of an automobile engine, comprising: (a) a magnet of cylindrical shape having (a1) a longitudinal axis, an aperture being formed along said axis and extending through said magnet, (a2) a first flat end surface, and (a3) a second flat end surface for magnetic attachment to said engine; (b) an electric heat sensitive device for temperature measurements, said device having electrical leads and being retained within said aperture by a heat-conductive material, and said electrical leads extending out of said aperture at said first flat end surface; (c) an electrical insulating board attached to said first surface of said magnet, said board having (c1) a clearance opening for leading said electrical leads therethrough, and (c2) electrical connection points on elongated contact means mounted on the free surface of said insulating board, said leads from said heat sensitive device being electrically connected respectively to said points; (d) a lead-out cable having lead-out leads, said lead-out leads being spacedly electrically connected via said contact means respectively to said connection points; and (e) a thermal insulating housing of an elastic and electrical insulating material, said housing enclosing said board and said connecting points and circumferentially encompassing and holding said magnet, thereby leaving open said second surface of said magnet, and said housing comprises an outlet portion for leading said lead-out cable out of said housing approximately parallel to said second surface of said magnet.