Abstract A multistylus recording head having a plurality of recording styli with each stylus incorporating a multilayer magnetostrictive structure having two adjacent layers with opposing magnetostrictive properties for producing a bending of the stylus in the presence of a longitudinally applied magnetic field. One end of each of the styli is arranged along a recording line and adjacent to a magnetic boundary displacement structure to form a magnetic flux path therewith. The magnetic displacement structure is energized by an input signal to produce a selective displacement of a magnetic null in a composite magnetic field. The magnetic null is positioned with respect to the recording styli whereby a selected stylus is arranged to be in contact with a recording medium while the remaining styli are bent out of contact with the recording medium by effect of the remaining magnetic field.
A multistylus recording head comprising a plurality of multilayer magnetostrictive recording styli with each of said styli having at least two layers having opposing magnetostrictive properties to produce a bending of the stylus in the presence of a magnetic field, and a magnetic field producing structure arranged to selectively orient a magnetic null with respect to one of said styli while subjecting the remaining ones of said styli to a magnetic field to produce a bending thereof whereby said one of said styli located at said magnetic null is physically separated from the rest of said styli.
Claim 2
Dependent Claim
97 words
A multistylus recording head comprising a plurality of multilayer magnetostrictive recording styli with each of said styli having at least two layers having opposing magnetostrictive properties to produce a bending of the stylus in the presence of a magnetic field, and a magnetic field producing structure arranged to selectively orient a magnetic null with respect to one of said styli while subjecting the remaining ones of said styli to a magnetic field to produce a bending thereof whereby said one of said styli located at said magnetic null is physically separated from the rest of said styli.
Claim 3
Dependent Claim
108 words
A multistylus recording head as set forth in claim 1 wherein said magnetic field producing structure includes a solenoid arranged to be energized by an input signal to produce a magnetic field component, and a magnetic bias field structure including a source of a fixed magnetomotive force and a magnetoresistive means for absorbing said magnetomotive force whereby to produce across said magnetoresistive structure a magnetic potential gradiant having a null located along said magnetoresistive structure, said magnetic field component from said solenoid being arranged to interact with said magnetoresistive structure to displace said magnetic null in proportion to the amplitude of an energizing signal applied to said solenoid.