Architectural innovation leaves the core technological concepts of the components intact but changes the way they are designed to work together, as in the change from removable disk packs
to the sealed Winchester disk drive architecture.
The piston clamps the brake disk pack
, which is similar to the clutch pack except that the steel plates are keyed to the unit housing.
Composite disk packs
at both ends of a center spacer that allow a surplus of parallel and axial misalignment while remaining torsionally stiff through all harmonic ranges.
This was followed by punched paper tape, magnetic drums, magnetic disk packs
, 8" floppy disks, 5 1/4" floppy disks, 3 1/2" diskettes and USB memory drives.
These mobile media include tape; CD, DVD, and disk; and RAID disk packs
, where each meets a different need.
The coupling incorporates a torsionally stiff element consisting of flexible stainless steel discs that allow it to compensate for angular, axial and parallel misalignment with two disk packs
and a spacer.