Raytheon Company

Hughes Aircraft Company

Other

Sunder S Rajan

Keith Carrigan

Mary K Herndon

Nicholas J LoVullo

Michael Ushinsky

Kurt S Ketola

James A Dayton, Jr

Ivo Tammaru

Thomas P Carlisle

Roger S Hollister

Steve L Bosma

John W Eldridge

Robert Ko

A compliant mount or mechanism structure includes a titanium-zirconium-niobium alloy including titanium, about 13.5 to about 14.5 wt. % zirconium, and about 18 to about 19 weight % (wt. %) niobium. The titanium-zirconium-niobium alloy has a congruent melting temperature of about 1750 to about 1800° C.

Congruently melting titanium-zirconium-niobium alloy

A flexure including a bipod strut pair extending from a base and a titanium-zirconium-niobium alloy, which includes titanium, about 13.5 to about 14.5 wt. % zirconium, and about 18 to about 19 weight % (wt. %) niobium. The titanium-zirconium-niobium alloy has a congruent melting temperature of about 1750 to about 1800° Celsius (° C.).

Congruently melting high purity titanium alloy for optical mounts, flexures, and structural elements requiring compliance

An optical mount part having a body that includes a composite of a titanium-zirconium-niobium alloy. The titanium-niobium-zirconium alloy includes titanium, about 13.5 to about 14.5 wt. % zirconium, and about 18 to about 19 weight % (wt. %) niobium. The titanium-niobium-zirconium alloy has a congruent melting temperature of about 1750 to about 1800&#xb0; Celsius (&#xb0; C.).

Property tailored additively manufactured composite structural elements using congruently melted titanium-niobium-zirconium alloy matrix

A flexure including a bipod strut pair extending from a base and a titanium-zirconium-niobium alloy, which includes titanium, about 13.5 to about 14.5 wt. % zirconium, and about 18 to about 19 weight % (wt. %) niobium. The titanium-zirconium-niobium alloy has a congruent melting temperature of about 1750 to about 1800&#xb0; Celsius (&#xb0; C.).

A shape memory alloy including a Ni&#x2014;Ti based alloy is superelastic at temperatures of about &#x2212;40&#xb0; C. to about 60&#xb0; C. after being exposed to temperatures of about &#x2212;55&#xb0; C. to about 85&#xb0; C. A method of forming a memory shape alloy may include preparing a rod comprising a Ni&#x2014;Ti alloy, drawing a wire from the rod, and treating the wire at a temperature of about 500&#xb0; C. to about 550&#xb0; C. for about less than 1 minute.

Superelastic wire and method of formation

A method for constructing thermally and dimensionally stable traveling wave tube circuits having high dimensional stability, narrow tolerances, and very small size by providing a small hollow preform constructed of a desired material which is coated with a layer of photoresist material then exposed to a UV laser to form a desired pattern mask in the photoresist layer. The pattern masked preform is then etched to create a preform having a desired shape. After shaping, the photoresist coating is stripped from said shaped preform to form a traveling wave tube circuit. Optionally the travel wave tube circuit may be polished. Additionally, the present invention contemplates an apparatus for forming small three dimensional circuit structures from preforms comprising a chuck for supporting the preform on its axis, a motor for rotating the preform, a UV laser for directing a beam onto the preform, a means for shifting the laser along said preform, and a controller for controlling the motors rate of rotation, the rate of movement along the length of the preform caused by shifting means, and whether the laser is on or off to achieve a predetermined pattern mask on the preform. Additionally, the present invention contemplates novel three dimensional structures including a very small helical traveling wave tube circuit, a ringed bar circuit structure, a finned ladder circuit structure, and a slotted finned ladder circuit structure as well as traveling wave tubes incorporating these structures.

Method for fabricating three dimensional traveling wave tube circuit elements using laser lithography

Extra loss is introduced in coupled cavity and klystron RF circuits by applying a surface coating to selected parts of circuit elements used in the circuits. The coating is applied in the form of a slurry, which is then sintered. The slurry comprises a mixture of an iron-base powder (such as a stainless steel) and a dielectric glass ceramic, suspended in a binder dissolved in a solvent. Circuits with the loss coating are easier to match than by other prior art techniques. The loss coating of the invention reduces the fabrication cost of coupled-cavity traveling wave tubes, while improving the performance by minimizing the gain ripple. Higher average power operation is possible, due to elimination of loss buttons previously employed in the prior art.

Surface coated RF circuit element and method

In a travelling-wave tube (20), a cylindrically-shaped slow-wave circuit cavity-defining member (34) is supported by and is thermomechanically bonded to a tubularly-configured vacuum wall member (32). The bonded joint comprises a pair of arcuate grooves (52) extending lengthwise of the slow-wave circuit and positioned diametrically opposite one another about the axis of the tube. A helical or wavy spring (54, 58) lies in each groove and is resiliently biased in intimate mechanical and thermal contact between the groove and the vacuum wall. The helical spring, in particular, can be used as a conduit for exhaust of gases from the travelling-wave tube during its fabrication.

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Anaheim, CA, United States of America

Sunder S Rajan