Hewlett-packard Company

Edward Walsh

Roger Robert Sleger

David W Woito

An impact limit stop or crash stop control in a disc drive for setting and maintaining the limits of movement and the stopping distance of a linear or rotary actuator member which supports and moves the transducer heads for bidirectional movement between radial limits with respect to the memory discs. In one of its aspects, this crash stop control provides a low sensitivity, high precision, limit stop adjustment which sets the limits of movement of the actuator member, and which, in another of its aspects, provides a non-linear deceleration characteristic, with some frictional damping, for the actuator member in its limits of movement.

Head actuator limit stop assembly for a disk memory drive

A modular rotary disc drive or disc file having three major subassemblies. These are a rotary actuator structure subassembly having an actuator housing and a pivotally mounted actuator member in said housing, an armstack subassembly including the transducer heads and their electric circuits including the plug terminal therefor, and a magnetic driver subassembly having a magnetic housing and a movable coil assembly. The armstack subassembly is attached and removed from the actuator member without removing the actuator member from the actuator housing. The magnetic housing of the magnetic driver subassembly is secured to the actuator housing and its moving coil assembly is secured to the actuator member. This magnetic driver subassembly is also attached and removed as a unit without removing the actuator member from the actuator housing.

Three piece head actuator arm assembly for disc drive

An actuator arm assembly for a rotary disc memory drive which comprises a pivotally mounted actuator member and an arm stack unit mounting individual transducer head flexure assemblies. The armstack unit is connected to the actuator member at two locations and requires clamping only at one of the two locations to secure the connection at both locations. The armstack and transducer head flexure assemblies are removable as a unit by unclamping the armstack at that one location, effecting release at both locations, permitting armstack removal as an aligned assembly unit including the transducer head flexure assemblies, circuits and electrical connectors.

Two point attachment with single point clamping for connecting the arm

A shaft assembly of a rotary actuator arm structure in a rotary disc memory drive in which all machine operations cutting slots or openings for receiving leaf springs which provide axial and radial loads are performed along axes paralleling the axis of the rotary actuator. One leaf spring provides an axial load on the bearings of the shaft assembly. A second leaf spring fitted between one shaft bearing and the bearing housing thereat provides the radial bearing load.

Growing community of inventors

Boise, ID, United States of America

Edward Walsh