Electric lamp and discharge devices – With radioactive material
Patent
1975-08-26
1977-08-30
Willis, Davis L.
Electric lamp and discharge devices
With radioactive material
250505, H01J 3500
Patent
active
040456994
ABSTRACT:
A light-metal pane usable as an X-ray transmissive or penetrable window which is constituted of a material readily permitting the passage of X-rays therethrough. The window pane is obtained through the use of a two-layer material, of which one layer is formed of light-weight metal, and the other layer comprises a heavy-weight metal. In the ray transmitting portion of the window, the heavy-weight metal layer is removed, and at the edge the light-weight metal, so that there remains the two-layer material in the transitional region towards the edge of the window.
REFERENCES:
patent: 2665391 (1954-01-01), Bleeksma
patent: 2955219 (1960-10-01), Niklas
patent: 3287581 (1966-11-01), Rome et al.
patent: 3419741 (1968-12-01), Legendre
Siemens Aktiengesellschaft
Willis Davis L.
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