Inductive measuring transducer for a fluidic adjusting member

Claim 1

An improved inductive measuring transducer which is impermeable to fluid pressure agents for use with a fluidic adjustable member such as a multiple position valve or flow valve, the transducer being of the type comprising a receiving casing of non-magnetic material for receiving a core, a plurality of coils surrounding said receiving casing and the core, a housing surrounding said coils, and a connecting member, the improvements wherein said receiving casing comprises a single continuous, hollow cylindrical tube having a plug seated directed in and closing one end thereof in fluid tight relationship; said connecting member is formed as a separate component from said receiving casing and is fixedly connected to the exterior of the other end of said tube in fluid tight relationship, said connecting member being spaced from said coils to permit adjustment of the relative positions thereof; said housing comprises a body of polymeric material completely enclosing said coils; said housing and said coils surround said receiving casing and are axially movable as a unit relative to said receiving casing between said connecting member and said one end of said receiving casing; said core is disposed on one end of a rod, and said core and rod have substantially equal transverse cross-sectional dimensions; first and second adjusting nut means are mounted at opposite ends of said housing for adjusting the axial position of said housing and coils relative to said casing and for firmly holding said housing and coils against movement; and means are provided on said housing and said connecting member for preventing relative rotation between said coils and said casing, said means for preventing rotation including a plurality of mating projections and recesses formed in said housing and said connecting member.