Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
217 words
A magnetic disk jacket formed of substantially plane semi-rigid material, said disk jacket constructed to enclose a disk, said jacket having a "write/erase protect device"; said jacket having a flap folded inwardly along one edge to form a partially closed channel in said folded portion; an elongated shutter slideably mounted in covered relationship in said channel in frictional contact with the upper and lower inner surfaces of said channel; a "write protect" opening formed in the side of said jacket of said disk, said write protect opening being so disposed in said jacket flap to enable said shutter to move slideably in frictional contact in said channel a longitudinal or lateral direction to a blocking position to block said write protect opening, and alternatively to a write allow position to unblock said write protect opening; an elongated control opening in said jacket flap spaced apart from said write protect opening, for exposing said shutter in said channel; said control opening constructed to accommodate a pointed instrument for contacting and engaging said shutter through said control opening at a point below the surface of said jacket to move said shutter against frictional bias from said write allow position to said blocking position and vice versa, said frictional bias being constrained to lock said shutter into said alternative positions.
Claim 2
Dependent Claim
217 words
A magnetic disk jacket formed of substantially plane semi-rigid material, said disk jacket constructed to enclose a disk, said jacket having a "write/erase protect device"; said jacket having a flap folded inwardly along one edge to form a partially closed channel in said folded portion; an elongated shutter slideably mounted in covered relationship in said channel in frictional contact with the upper and lower inner surfaces of said channel; a "write protect" opening formed in the side of said jacket of said disk, said write protect opening being so disposed in said jacket flap to enable said shutter to move slideably in frictional contact in said channel a longitudinal or lateral direction to a blocking position to block said write protect opening, and alternatively to a write allow position to unblock said write protect opening; an elongated control opening in said jacket flap spaced apart from said write protect opening, for exposing said shutter in said channel; said control opening constructed to accommodate a pointed instrument for contacting and engaging said shutter through said control opening at a point below the surface of said jacket to move said shutter against frictional bias from said write allow position to said blocking position and vice versa, said frictional bias being constrained to lock said shutter into said alternative positions.
Claim 3
Dependent Claim
57 words
The combination in accordance with claim 1 wherein said shutter is locked into said blocking position or said write allow position in said channel by the bias imposed by the frictional contact between the surfaces of said shutter and the inner surfaces of said channel, which frictional bias is sufficient to hold said shutter locked in place.
Claim 4
Dependent Claim
40 words
The combination in accordance with claim 1 wherein said shutter is an elongated member formed of substantially plane, opaque, rigid material, confined in said partially enclosed channel, and devoid of lateral projections which extend beyond the edge of said jacket.
Claim 5
Dependent Claim
35 words
The combination in accordance with claim 1 wherein said shutter is an elongated member without lateral projections of a rigid material which is responsive to trigger the operation of mechanical, optical or infrared notch sensors.