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5.25" floppy with write-protect "slider"

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    5.25" floppy with write-protect "slider"

    I tore open a new package of DSDD 5.25" floppies yesterday and was surprised to see that these are equipped with a small aluminum "slider" for write protection. Kind of cool, really.

    Has anyone else ever run into these? They're not branded--I probably picked these up around 25-30 years ago.
    Reach me: vcfblackhole _at_ protonmail dot com.

    #2
    I have never even heard of such a disk. Unbranded just seems odd. That is the sort of thing that would be emblazoned on the box marking the disks as new and improved.

    Comment


      #3
      Neat! Never seen that before, myself. The sticky protect tabs never seem to stay with the diskette, I almost always end up with either Scotch tape over the paper write protect label, or just a piece of black electrical tape over the notch.
      Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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        #4
        Picture? I have never run across anything like that, and I've seen thousands of disks!

        Comment


          #5
          Pictures, or they don't exist!

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            #6
            If ChuckG hasn't seen them before, then really, what are the chances anyone else has?

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              #7
              Originally posted by glitch View Post
              ... The sticky protect tabs never seem to stay with the diskette, I almost always end up with either Scotch tape over the paper write protect label, or just a piece of black electrical tape over the notch.
              Just like with diskette labels there are both good and bad write-protect tabs. Along with the stay-on-forever labels I also have some of the reliably sticky write-protect tabs. Look here for the labels. If you want some of either the labels or tabs... lemme know.
              PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

              Comment


                #8
                Originally posted by SomeGuy View Post
                If ChuckG hasn't seen them before, then really, what are the chances anyone else has?
                Presumably the manufacturer had employees.

                I would love seeing a disassembled disk but those might be the only prototype disks to have left the factory.

                Comment


                  #9
                  Pictures or I rank this as a Christmas fairy tale

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                    #10
                    Oh ye of little faith...

                    Look here The slider is positioned half-open for illustration.

                    It's pretty clever--the slider has a slight protrusion so it can be slid with a fingernail easily, yet remains firmly in place.

                    This is a pack of duplicator-grade floppies, so no ID on them.
                    Reach me: vcfblackhole _at_ protonmail dot com.

                    Comment


                      #11
                      Unbranded, odd? I've hundreds. They used to come in a pack of 50 with shrink wrap. I may actually have one of those packs somewhere.

                      Can't say I ever saw sliding write protect tabs before, though. 'Twould be nice if most of them had em.
                      Be polite and I may let you live.

                      https://www.youtube.com/playlist?lis...5NBVfKX5471R9U

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                        #12
                        Originally posted by KC9UDX View Post
                        Unbranded, odd? I've hundreds. They used to come in a pack of 50 with shrink wrap. I may actually have one of those packs somewhere.

                        Can't say I ever saw sliding write protect tabs before, though. 'Twould be nice if most of them had em.
                        I have many unbranded disks too. Advanced rare features don't show up there; most don't even have printed lot numbers. Premium disks get premium labels and adding a slider to the disk has to increase cost at least a little. There must be a fun story as to how these disks slipped out into the world.

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                          #13
                          "If ChuckG hasn't seen them before, then really, what are the chances anyone else has?" I was thinking the same thing, I am pretty sure he has forgot more about disks than most of us would every know.

                          Comment


                            #14
                            I did find several patents for read/write slider add-ons for 5.25" diskettes. The Zschau and O'Neill versions specify a metal slider. Someone with better shape recognition than me might be able to determine if the disk in question resembles any of the patented designs.

                            https://www.google.com/patents/US4521820 James D. Fann

                            https://www.google.com/patents/US4618060 Norman D. Tarter

                            https://www.google.com/patents/US4771354 Leo F. Zschau for Lotus Development

                            https://www.google.com/patents/US4860142 Anthony L. DiGiesi

                            https://www.google.com/patents/US4969060 Richard J. O'Neill

                            Comment


                              #15
                              I haven't seen these before. When I become a billionaire and open up a new floppy & tape media factory, I'll definitely make these in both 5.25" and 8". I'll even make flippy versions!

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