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US 4,791,508 AGranted
Magnetic disc memory unit
AssigneeRaymond Engineering Inc.
InventorsJames A. Augeri, Carl Bolz, Bruce Bickford, Paul Young, David Johnson
Life of this patent
Estimating the term…
Abstract
A magnetic disc memory unit is presented wherein a pair of read/write heads are attached to and driven by a continuous belt driven by a stepper motor. The read/write heads move linearly, and they retract to a landing position fully off the disc when the unit is shut down. The heads carriage structure is counterbalanced by a counterbalance assembly to allow operation at all altitudes and minimize vibration and shock problems.
Claims24
A magnetic disc memory unit comprising:
- housing means having an inside and an outside;
- means for rotatably driving said disc supporting means;
- read/write head means;
- head carriage means supporting said read/write head means;
- first means for moving said head carriage means and said read/write head means back and forth in a first linear direction between a retracted position and a preselected position relative to a disc mounted on said disc supporting means wherein said first linear direction is radial or parallel to a radial line with respect to a disc mounted on said disc supporting means;
- stepper motor means connected to said first moving means for driving said head carriage means and said read/write head means in said linear direction between said retracted position and said preselected position;
- counter balance assembly means for counter balancing the weight of said head carriage means and said read/write head means;
- second means for moving said counter balance assembly means in a second linear direction, said second linear direction being equal and opposite to said first linear direction wherein said first means for moving is coordinated with said second means for moving;
- said counter balance assembly means having a weight about equal to the weight of said head carriage means and said read/write head means;
- wherein said first means for moving said head carriage means comprises;
- first and second parallel guide rods;
- first and second block means for supporting opposed ends of said first and second parallel guide rods in said housing means;
- second bearing means mounted on said first and second parallel guide rods;
- and
- said head carriage means being attached to said second bearing means whereby said carriage means is movable in said first linear direction along and between said first and second guide rods;
- and
- wherein said second means for moving said counter balance assembly means comprises;
- a third guide rod parallel to said first and second guide rods;
- said third guide rod having opposed ends supported in said first and second block means;
- third bearing means mounted on said second and third parallel guide rods;
- and
- said counter balance assembly means being attached to said third bearing means whereby said counter balance assembly means is movable in said second linear direction along and between said second and third parallel guide rods.
19 more elements
A magnetic disc memory unit comprising:
- housing means having an inside and an outside;
- means for supporting a disc inside said housing means;
- means for rotatably driving said disc supporting means;
- read/write head means;
- first carriage means supporting said read/write head means;
- first means for moving said head carriage means and said read/write head means back and forth in a first linear direction between a fully retracted position and a preselected position relative to a disc mounted on said disc supporting means wherein said first linear direction is radial or parallel to a radial line with respect to a disc mounted on said disc supporting means;
- stepper motor means connected to said moving means for driving said head carriage means and said read/write head means in said linear direction between said fully retracted position and said preselected position;
- means for transforming said disc supporting means driving means to a power generator for producing electrical power to power said stepper motor means whereby said head carriage means and said read/write head means are moved into said fully retracted position during power interruption to said unit;
- and
- storing and protecting means for storing and protecting said read/write head means, said read/write head means being supported by said storing and protecting means when said read/write head means is moved into said fully retracted position.
7 more elements
Dependencies are inferred from the claim text.