The Machlett Laboratories, Incorporated

Machlett Labs. Inc.

Thomas J Koller

Steven Tavoletti

Jacob A Randmer

Albert F Fengler

Ming-Wei P Xu

Raymond A Daly

John D Weaver, Sr

An x-ray tube rotor structure wherein a target support stem has an externally threaded end portion engaged with an internally threaded surface of an encircling bushing and fixedly attached thereto by an interposed brazed joint. The stem is made of predominantly molybdenum material having a linear thermal expansion coefficient of 58.times.10.sup.-7 per degree Fahrenheit and is thermally matched with the bushing which is made of an iron cobalt nickel alloy material having a linear thermal expansion coefficient of 60.times.10.sup.-7 per degree Fahrenheit. The bushing has an outer surface fixedly attached through a welded joint with an inner surface of an annular plug which has an outer marginal portion fixedly attached to an adjacent end portion of a coaxial rotor skirt. The annular plug is made of an iron chrome nickel alloy material having a linear thermal expansion coefficient of 84.times.10.sup.-7 per degree Fahrenheit and is thermally compatible with the rotor skirt which is made of magnetic flux conductive steel having a linear thermal expansion coefficient of 75.times.10.sup.-7 per degree Fahrenheit. Thus, the largest thermal disparity and the maximum thermal stresses occur between the bushing and the plug at the interposed welded joint which is structurally stronger than the brazed joint between the bushing and the stem.

X-ray tube rotor structure

An X-ray generator system comprising a pressurized fluid source disposed for directing dielectric coolant fluid through a housing wherein an X-ray source may be electrically connected for generating X-rays, the system including a venturi device having a restricted passage through which the fluid flows and which is disposed in communication with portions of the housing where gas bubbles may accumulate in the fluid. Thus, the fluid flowing through the restricted passage of the venturi device produces a reduction in pressure which draws fluid from said portions of the housing so that any gas bubbles accumulated therein may be purged from the system.

X-ray generator cooling system

A rotatable x-ray target assembly and process for manufacturing the same is provided for an x-ray tube. The x-ray target assembly comprises an x-ray target member having an opening disposed therethrough and a support member having: a mounting surface disposed transversely to the axis of rotation, a lower surface of the target member being disposed on the mounting surface; and, a threaded stem extending from said mounting surface through the opening of the target member. The support member also comprises a nut adapted to receive the threaded stem, the nut engaging an upper surface of the target member. The target member is secured to the support member by brazing material disposed between the lower surface of the target member and the mounting surface, a first portion of the brazing material being diffused into the target member and a second portion of the brazing material being diffused into the mounting surface of the support member. With such arrangement, the target member is structurally bonded to the support member. Thus, the target member is substantially prevented from slipping on the support member during the rotation of the x-ray target member during operation of the x-ray tube, thereby preventing the target member from becoming imbalanced on the support member and substantially eliminating vibration of the target member during rotation.

Diffusion bonded x-ray target

An X-ray generator comprising a shielded housing having insulatingly mounted therein an X-ray tube provided with a predetermined focal spot area on a sloped target surface which is radially aligned with an X-ray transmissive window in the housing, the window having a preferred configuration for reducing preferential absorption of X-rays in a divergent beam emanating from the focal spot area of the target.

X-ray beam generator

A rotating anode target for X-ray tubes comprising a substrate disc provided with an annular marginal portion having opposed bevel surfaces convergent toward an outer peripheral edge of the disc, one of the surfaces being coated with a layer of X-ray emissive material which extends around the peripheral edge and terminates in an annular feathered edge merging with the opposed bevel surface of the disc.

Growing community of inventors

Shelton, CT, United States of America

Thomas J Koller