# US 4,400,824 A · X-Ray tube with single crystalline copper target member

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- Number: US 4,400,824 A
- Document ID: US4400824A
- Status: Granted
- Kind: A
- Application number: 06/233,432
- Filed: 1981-02-11
- Granted: 1983-08-23
- Earliest claimed: 1980-02-12
- Assignees: Tokyo Shibaura Denki Kabushiki Kaisha
- Inventors: Tokihiko Shidara
- Web page: https://patentgrep.com/patent/US4400824A

## CPC

- H01J 35/13: {Active cooling, e.g. fluid flow, heat pipes}
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)

## Abstract

An electron tube having a sealed envelope, a cathode disposed inside said sealed envelope, an anode sealed to part of the sealed envelope, and a target member cast to the surface of the substrate, wherein at least the part of the anode which adjoins the target member is substantially made of single crystalline copper.

## Claims

### Claim 1

An X-ray tube comprising a sealed envelope, a cathode disposed inside said sealed envelope, and an anode sealed to part of said sealed envelope and comprising an anode substrate of copper and a target member fixed to a surface of said anode substrate, at least that portion of said anode substrate which adjoins said target member being substantially made of single crystalline copper.

### Claim 2 (depends on 1)

An X-ray tube according to claim 1, wherein said anode substrate has holes for allowing flow of a cooling medium therethrough.

### Claim 3 (depends on 1)

An X-ray tube as in claim 1, wherein said target member is cast in the surface of said substrate.

### Claim 4 (depends on 1)

An X-ray tube as in claim 1, wherein said anode substrate has interior passages for circulating a cooling fluid.