Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention
Patent
1982-10-18
1984-08-14
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Recording-or erasing-prevention
360137, G11B 1504, G11B 500
Patent
active
044660243
ABSTRACT:
A reliable, fast, easily operated system for enabling the use of both sides of existing single-sided floppy diskette units involving creation of new disk-positioning (DP) holes centered at a pre-set location, so that the new holes bear the same spacial relationship to the disk-access slot on one side of the unit the original DP holes do to the disk access slot on the other side of the unit; the system includes a DP punch comprising a plunger and plate spaced from and cooperating with the plunger, and a positioning matrix to center the DP punch plunger over the appropriate pre-set location; the positioning matrix comprises a flat top section and a flat bottom section, which are joined along a portion of their perimeters to define a slot of sufficient length, depth and width to receive said unit therebetween; one edge of the top section defines a notch adapted to receive the disk-positioning punch, and the slot and notch are located, sized and shaped so that when the unit and a punch are fully inserted into the slot and notch respectively, the DP punch cannot readily be moved more than 1/8 inch in any direction with respect to the unit, and a portion of the DP punch plunger is over the pre-set location; the system also includes a write-protect punch and a spacer to position that punch.
REFERENCES:
patent: 4003088 (1977-01-01), Schwartz
80 Microcomputing, pp. 140, 142 Richard Taylor 10/82.
Canney Vincent P.
D/Punch Co.
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