Sealed magnetic tape cassette apparatus

Claim 3

Apparatus means for preventing signal reproduction problems due to tape misalignment in a magnetic tape cartridge comprising, in combination: tape cartridge means; tape storage means mounted in said cartridge means; magnetic record and playback means mounted in said cartridge means; tape means connected to said tape storage means and positioned contiguous said magnetic record means and playback means, said tape means being diagonally cleared of magnetic oxide at each end vertically cleared of magnetic oxide in a centrally located intermediate portion; radiation source means mounted contiguous one side of said tape means, said magnetic oxide being impermeable to the radiation from said source means; and first and second detector means mounted contiguous the other side of said tape means, said first detector means first receiving radiation at one end of said tape means, said second detector means first receiving radiation at the other end of said tape means and both of said detectors receiving radiation substantially simultaneously at the intermediate portion of said tape means.

Claim 4

Apparatus means for preventing signal reproduction problems due to tape misalignment in a magnetic tape cartridge comprising, in combination: tape cartridge means; tape storage means mounted in said cartridge means; magnetic record and playback means mounted in said cartridge means; tape means connected to said tape storage means and positioned contiguous said magnetic record means and playback means, said tape means being diagonally cleared of magnetic oxide at each end vertically cleared of magnetic oxide in a centrally located intermediate portion; radiation source means mounted contiguous one side of said tape means, said magnetic oxide being impermeable to the radiation from said source means; and first and second detector means mounted contiguous the other side of said tape means, said first detector means first receiving radiation at one end of said tape means, said second detector means first receiving radiation at the other end of said tape means and both of said detectors receiving radiation substantially simultaneously at the intermediate portion of said tape means.

Claim 5

A magnetic tape cartridge system comprising, in combination: magnetic recording container means including mechanical and electrical inputs and outputs sealed against environmental contaminants; magnetic head means electrically connected to said electrical inputs and outputs of said container and mounted therein: magnetically recordable means; means for storing said magnetically recordable means and moving it contiguous said magnetic head in respoNse to mechanical inputs to said container; radiation source means; tape drive mechanism; and shutter means situated in said container means between said radiation source means and said tape drive mechanism whereby write signals are supplied to said magnetic head means via said electrical inputs of said container means only upon reception of radiation from said container means by said tape drive mechanism means through the movement of the shutter to an inoperative position from the operative position in which it blocks the reception of said radiation by said tape drive mechanism.

Claim 6

A magnetic tape cartridge system comprising, in combination: magnetic recording container means including mechanical and electrical inputs and outputs sealed against environmental contaminants; magnetic head means electrically connected to said electrical inputs and outputs of said container and mounted therein: magnetically recordable means; means for storing said magnetically recordable means and moving it contiguous said magnetic head in respoNse to mechanical inputs to said container; radiation source means; tape drive mechanism; and shutter means situated in said container means between said radiation source means and said tape drive mechanism whereby write signals are supplied to said magnetic head means via said electrical inputs of said container means only upon reception of radiation from said container means by said tape drive mechanism means through the movement of the shutter to an inoperative position from the operative position in which it blocks the reception of said radiation by said tape drive mechanism.

Claim 7

A magnetic tape cartridge comprising, in combination: magnetic recording container means including mechanical and electrical inputs and outputs sealed against environmental contaminants; tape means; reel means for storing said tape means and adapted for receiving mechanical inputs as supplied to said container means; magnetic head means electrically connected to said electrical inputs and outputs of said container means and mounted therein; friction means contiguous the mechanical input portion of said container means; rotatable hub means forming a portion of said mechanical input said hub means including female drive portion and having an opening therein; brake means within said hub means including arm means for contact with said friction means and a central portion situated contiguous the driving portion of said hub means and in said opening; and biasing means within said hub means coacting with said brake means for forcing said arms into contact with said friction means for constraining movement of said hub means when said hub is not being driven and allowing movement of said arms away from said friction means when a male drive mechanism is being inserted into the female portion of said drive hub.

Claim 8

A magnetic tape cartridge comprising, in combination: magnetic recording container means including mechanical and electrical inputs and outputs sealed against environmental contaminants; tape means; reel means for storing said tape means and adapted for receiving mechanical inputs as supplied to said container means; magnetic head means electrically connected to said electrical inputs and outputs of said container means and mounted therein; friction means contiguous the mechanical input portion of said container means; rotatable hub means forming a portion of said mechanical input said hub means including female drive portion and having an opening therein; brake means within said hub means including arm means for contact with said friction means and a central portion situated contiguous the driving portion of said hub means and in said opening; and biasing means within said hub means coacting with said brake means for forcing said arms into contact with said friction means for constraining movement of said hub means when said hub is not being driven and allowing movement of said arms away from said friction means when a male drive mechanism is being inserted into the female portion of said drive hub.