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Dual Element Revolver

IP.com Disclosure Number: IPCOM000096286D
Original Publication Date: 1963-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Comer, DT: AUTHOR

Abstract

To provide a magnetic revolver structure having closely spaced read write elements without producing interference between them, an auxiliary revolver head 11 is provided spaced from the main revolver head 12. Head 11 has write head 11a and read head 11b. Head 12 has write head 12a and read head 12b. Heads 11 and 12 are interconnected so that only one element within a head is utilized at any one time. This alternate operation is controlled by trigger 14. This has one output line 14a connected both to one input of And 15 associated with the output of head 11b and to one input of And 16 in the input of head 12a. The other output line 14b of trigger 14 is similarly connected to And 17 in the output of head 12b and to And 18 in the input to head 11a.

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Dual Element Revolver

To provide a magnetic revolver structure having closely spaced read write elements without producing interference between them, an auxiliary revolver head 11 is provided spaced from the main revolver head 12. Head 11 has write head 11a and read head 11b. Head 12 has write head 12a and read head 12b. Heads 11 and 12 are interconnected so that only one element within a head is utilized at any one time. This alternate operation is controlled by trigger 14. This has one output line 14a connected both to one input of And 15 associated with the output of head 11b and to one input of And 16 in the input of head 12a. The other output line 14b of trigger 14 is similarly connected to And 17 in the output of head 12b and to And 18 in the input to head 11a. Trigger 14 can be switched by a clock input to alternately switch the connections of the revolver heads 11 and
12.

New input data for the revolver passes through And 21 and Or 22 to whichever one of And's 16 and 18 is energized by the output from trigger 14. If And 16 is energized, write data is supplied to head 12a for recording on the revolver track. At the same time, the associated head 12b is not energized, so that reading occurs from head 11b, free of interference from the writing produced by head 12a.

The read output data is supplied through And's 15 and 17 and Or 24 to And
26. Here the data is clocked through the bit clock line either to the data output circuit or back through And 27 to the wr...