Browse Prior Art Database

Multitrack Magnetic Head Assembly

IP.com Disclosure Number: IPCOM000092082D
Original Publication Date: 1968-Aug-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 82K

Publishing Venue

IBM

Related People

Faure, LH: AUTHOR [+2]

Abstract

Plastic fixture 1, drawing A, comprises slots 2 and lands 3 to receive shields 4 and magnetic cores 5. Each core 5 carries a wire coil surrounded by insulating cover 6 from which protrude connecting wires 7. Break-off slots 8 in the rear of fixture 1 form reduced areas 9 by which end portions 10 and 11 are joined to center portion 12. Fixture 1 includes passages 13 and 14 communicating with two potting holes 15 and 16 and extending as channels 13a and 14a, which are open in front, through center portion 12, drawing B.

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Multitrack Magnetic Head Assembly

Plastic fixture 1, drawing A, comprises slots 2 and lands 3 to receive shields 4 and magnetic cores 5. Each core 5 carries a wire coil surrounded by insulating cover 6 from which protrude connecting wires 7. Break-off slots 8 in the rear of fixture 1 form reduced areas 9 by which end portions 10 and 11 are joined to center portion 12. Fixture 1 includes passages 13 and 14 communicating with two potting holes 15 and 16 and extending as channels 13a and 14a, which are open in front, through center portion 12, drawing B.

When shields 4 and cores 5 are inserted, plastic pin connector 17 is installed, and wires 7 are soldered to pins 18. To form an encasing chamber, brass housing 19 is snapped into place in fixture 1. Drops of liquid epoxy are applied through opening 20 to bond shields 4 to cores 5. Subsequently, plastic wire protector cap 21 is cemented into place on connector 17.

Prior to potting, the entire assembly is heated in a preheating step. Potting compound is applied through hole 15. It flows through channels 13 and 13a, then passing shields 4 and cores 5 to upper channels 14 and 14a, entering hole 16, displacing air and filling any spaces inside fixture 1. After curing the potting compound, end portions 10 and 11 are broken off. Cutting and grinding remove excess portions of shields 4, cores 5, center portion 12 and potting compound. The completed multitrack magnetic head cooperates with magnetic tape 22 as in
C.

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