Browse Prior Art Database

Magnetic Head Advance and Retraction Mechanism

IP.com Disclosure Number: IPCOM000088696D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Kirksey, JR: AUTHOR

Abstract

Magnetic stripe readers utilizing magnetic read/write heads sometimes suffer from shortened life of the magnetic heads due to wear. It is desired that the magnetic heads be retracted out of contact with the magnetic stripe during the return passage of the heads in preparation for reading another stripe or for a writing operation. The figure illustrates a mechanism that allows the magnetic heads to be in contact with the magnetic stripe only when the heads are in use but out of contact with the stripe during the return stroke of the head motion drive.

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Magnetic Head Advance and Retraction Mechanism

Magnetic stripe readers utilizing magnetic read/write heads sometimes suffer from shortened life of the magnetic heads due to wear. It is desired that the magnetic heads be retracted out of contact with the magnetic stripe during the return passage of the heads in preparation for reading another stripe or for a writing operation. The figure illustrates a mechanism that allows the magnetic heads to be in contact with the magnetic stripe only when the heads are in use but out of contact with the stripe during the return stroke of the head motion drive.

In the figure, the magnetic read and write heads 1 and 2, respectively, are mounted in head transport arms 3 and 4, respectively, which are pivoted at pivots 5 and 6 to the rigid main body of a translation carriage 7. Carriage 7 is driven by a helical lead screw 8 which is rotated by a motor (not shown) to draw the carriage 7 back and forth in a linear path. In a typical application, magnetic read and write heads 1 and 2 are desired to traverse a magnetic stripe on a document media 9, positioned on the bed plate 10 of a machine which holds the media bearing the magnetic stripe 9. The magnetic read and write heads are spring biased in the upward direction by load springs 11 under the reading and writing stroke of the lead screw mechanism. The read and write heads 1 and 2 are shown in their retracted and latched down position out of contact with the magnetic stripe 9. Magn...