Ampex Corporation

Gregory A Orton

Stanley M Latimer

Larry A Price

Kaynam Chun

Improved magnetic tip designs attain low spacing loss and enhance the channel output signal while extending head life. One embodiment includes a relatively flat tape contacting surface whose outer edges are modified to provide a tape contacting surface of dumbbell or bow-tie shape, that is, a shape which is narrower at its center near the magnetic gap and wider at its front and rear ends. The desired shape for the tape contacting surface is attained by shaving or beveling the edges of the tip at a relatively sharp angle to remove more material along the top of the curvature of the head near the gap than at the front and rear of the tape contacting surface. This allows air to bleed from under the tape as the head tip travels past the tape. In another embodiment the desired shape is attained by polishing and/or grinding the edges of the tip at a controlled angle as small as 1.0 degree to remove sufficient material to create the desired bow-tie shaped tape contacting surface. Either embodiment may be further modified to define an air knife surface at the leading edge of the tip which reduces the effect of an air shock wave impacting the front of the tip as it initially reaches an operative relationship or 'read' position with respect to the tape.

Magnetic head tip design to reduce dynamic spacing loss and improve

A magnetic transducer of the erasing type, in which the coil is pre-wound to achieve greater manufacturing economy; and in which for the same reason, and also for electromagnetic operating efficiency, the core is laminated with each lamination being of one-piece fabrication. However, the single transducing gap in the core is too small to permit threading the coil thereon. Therefore, the core is formed of flexible material so that the gap can be enlarged to accept the coil during assembly. Alternatively, the core can be fabricated initially with an enlarged gap, and the flexible core is then bent to provide a desired gap length after the coil is assembled thereon. A variational form of the invention has two erase gaps and one record-play gap with a separate coil therefor.

Electromagnetic transducers having E-shaped cores and shielding

Bendable E-shaped transducer

A magnetic transducer assembly having separate core portions with keyways provided therein. The core portions are assembled to form a substantially closed magnetic circuit defining a transducing gap. The keyways form recesses which are contiguous with a transducer inner space provided by the assembled cores. The inner space and recesses are filled with a non-magnetic bonding material. The resulting bond improves the mechanical coupling between the core portions.

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Fremont, CA, United States of America

Gregory A Orton