Abstract: A write enabling device 10 includes a hexahedron-shaped planar member or a planar member fabricated from resilient material. Write enabling device 10 is sized to be snugly and tightly accepted and retained by recording safety cavity 16 of a recording medium such as a tape cassette. When write enabling device 10 is inserted into cavity 16, the writing (recording) feature of a recording machine is either enabled or disabled depending upon the recording machine. In conventional recording machine, patching up of cavity 16 recording enabled. For better retention in cavity 16, many different kinds of methods are used, for example--resilience of material used, use of groove(s), friction enhancing ridges, etc. For ease with removal from cavity 16, bevel 22 is used. When tail side 38 is pressed upon, a void with no support (in the form of bevel 22) creates the required leverage action necessary to pop out head side 36 for removal of write enabling device 10 from cavity 16.

Abstract: A write enabling device 30 includes a hexahedron-shaped plug 32 fabricated from resilient material such as polyethylene. The plug 32 is sized to be snugly accepted by the write protect detection cavity 102 of a tape cassette. When the plug 32 is inserted into the detection cavity 102, the writing (recording) feature of the player/recorder is enabled. A flange 42 assists in the removal of an installed plug 32. Other embodiments include a second planar member 568 which may be selectively rotated to cover or uncover an aperture 562 positioned over the write protect detection cavity 102, and a cover member 668 which may be selectively slidably positioned to cover or uncover an aperture 662 positioned over the write protect detection cavity 102.