Other

Bethlehem Steel Corporation

Alfred R Austen

Darral V Humphries

Apparatus and method for supporting an elongated slender member having a high axial compression stress state during a change in length of the member.

Dynamic anti-buckling support for a long slender member with a high axial compression stress state and changing length

An apparatus and method for moving a wire along its own axis against a high resistance to its motion causing a substantial uniaxial compression stress in the wire without allowing it to buckle. The apparatus consists of a wire gripping and moving drive wheel and guide rollers for transporting the moving wire away from the drive wheel. Wire is pressed into a peripheral groove in a relatively large diameter, rotating drive wheel by a set of small diameter rollers arranged along part of the periphery causing the wire to be gripped by the groove. The drive wheel can have a smooth peripheral surface and a groove or grooves parallel in the outer surface of small diameter rollers.

Method and apparatus for applying uniaxial compression stresses to a moving wire

An apparatus and method for moving a wire along its own axis against a high resistance to its motion causing a substantial uniaxial compression stress in the wire without allowing it to buckle. The apparatus consists of a wire gripping and moving drive wheel and guide rollers for transporting the moving wire away from the drive wheel. Wire is pressed into a peripheral groove in a relatively large diameter, rotating drive wheel by a set of small diameter rollers arranged along part of the periphery causing the wire to be gripped by the groove.

A hydrostatic extrusion apparatus whereby semicrystalline thermopolastic polymers can be hydrostatically extruded in a solid state is described. The apparatus includes an outer tooling support means; a container assembly aligned within one end of the outer support means and having pressure means contiguous therewith whereby pressure is applied to the apparatus to both rigidly align the tooling and provide sufficient pressure for extrusion of a polymer billet within the container assembly and a receiver assembly coaxially aligned with the container assembly in the other end of the tooling means. The container assembly includes a container means, sealing means to prevent leakage of hydrostatic fluid in the container means and a die portion on the inner forward surface of the container means. The receiver assembly includes a concentrically aligned mandrel which supports and aligns a mandrel-head in spaced relationship with the die portion of the container means. Means are also provided for receiving, lubricating and cooling the extrudate in the receiver assembly. A base portion supports the extrudate receiving assembly and coacts with the pressurizing means in the container assembly to rigidly align and clamp the tooling means together.

Apparatus for the hydrostatic extrusion of thermoplastic polymers

A hydrostatic extrusion apparatus whereby thermoplastic polymers can be hydrostatically extruded in a solid state is described. The apparatus includes:

Apparatus for hydrostatic extrusion of thermoplastic polymers

A resettable apparatus including a deformable restraining element adapted to contact and restrain active elements for producing a time-delayed force or displacement response. The apparatus functions by the release of the force and/or displacement active element by the creep deformation action of the restraining element at a time interval after actuation of the active element.

Timed-action actuators

A thick-walled, seamless, rigid conduit having a substantially uniform wall thickness which is not less than about 0.5 percent of the outside diameter consisting essentially of an oriented crystalline thermoplastic polymer characterized by a structure comprised of radially compressed discrete, platelet-like spherulitic crystalline aggregates and having a combination of good ultimate tensile strength and low temperature tensile impact strength is described. The conduit is fabricated by solid state hydrostatic extrusion of a substantially non-oriented semi-crystalline thermoplastic polymer preform which may contain up to about 60 weight percent filler. The polymer is substantially simultaneously elongated in both circumferential and axial directions by compressive forces with the circumferential elongation being at least 100 percent. The apparatus used to produce the product is a hydrostatic extrusion press which includes an annular orifice in which the thermoplastic polymer is elongated substantially simultaneously circumferentially and axially with the circumferential elongation being at least 100 percent. Means for maintaining the rigidity of tooling and the hydrostatic extrusion fluid pressure while providing a film of the fluid on the preform for lubricity are provided in the apparatus. A sheet substantially uniform in thickness and having substantially the microstructure and properties of the conduit and excellent drawability may be made from the conduit. An article of manufacture may be made by solid state deformation processing of the conduit or the sheet.

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Bath, PA, United States of America

Alfred R Austen