US777503A - X-ray tube. - Google Patents

Description

N0.77'7.50s. PATENTED DEC. 13, 1904.

R. FRIEDLANDER.

X-RAY TUBE.

APPLICATION FILED SEPT. 12. 1904.

N0 MODEL Unnirn STATES- Patented December 13, 1904.

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X-RAY TUBE.

SPECIFICATION formingpart of Letters Patent No. 777,503, dated December 13, 1904. Application filed September 12, 1904. Serial Nb. 224,073. (No model.)

To all whom it may concern:

Be itknown that 1, ROBERT FRIEDLANDER, a citizen of the United States of 'America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in X-Ray Tubes, of which the following is a specification.

This invention relates to that type of vacuum or. X-ray tubes in which provision is made for regulating the degree of vacuum existing within the tube, and more especially to that form of such tubes which forms the subject-matter of Letters Patent No. 725,331, issued April 14:, 1903, to'Theodor Friedlander; and the present improvement has for its object to provide asimple and efficient structural arrangement and combination of parts whereby the degree of attenuation within the raytube can be increased or diminished as required and as will hereinafter more fully appear.

are arranged as shown or in any other usual and suitable manner.

5 is a tubular neck or chamber connecting with the ray-tube proper, so as to be in communication with the interior of the ray-tube.

6 is a head or terminal arranged in the interior of the neck or chamber 5 and provided with the usual connecting-eye 7 of the exterior of the neck 5 for convenient connection with the line wire or wires of the inductorium. In the present invention the head or terminal 6 constitutes the means for efiiecting an increase or a decrease, as required, in the-degree of attenuation of the atmosphere within the ray-tube, and to such end has a compound construction, as follows:

8 is tubular casing or shell forming a portion of the head or terminal 6 aforesaid, and formed of platinum or other equivalent material, which under the influence of an elecposed of potassic hydrate or other like sub-' stance, which under the influence of an electrical dischargefrom the negative pole of the inductorium is adapted to give'ofi in a gradual manner a volume of gas to the gaseous atmosphere of the ray-tube to effect a'gradual decrease in the degree of attenuation of the same.

10 is a passage in the side of the tubular casing or shell 8, through which the gas generated from the filling 9 passes into the interior of the ray-tube.

Various ordinary modifications can be made in the relative arrangementand formation of the par-ts constituting the terminal or head 6 without departing from the scope of the present invention so long as the essential feature ofthe invention ismaintained, and which consists, broadly, in having the parts 8 and 9 connected in common to a single external connecting-eye or its equivalent and adapted for connection with-one orthe other of the poles of an inductorium or other source of high-fre-' quency electric current.

I The present invention affords a very simple, durable,vand efficient arrangement'of parts, wherein asingle connecting-eye 7 is capable of energizing either of the aforesaid increasing and reducing agencies 8 and 9 to either increase or reduce the degree of alteration of the atmosphere of the ray-tube, the only requirement beinga change in the connection from the positive to the negative current, or vice versa, of the inductorium to the aforesaid eye 7 or a complete disconnection of the inductorium from such connecting-eye when the requireddegree of attenuation is attained.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

l. A ray-tube, and a compound terminal arranged therein-and comprising a gas-absorbing and a1 gas-evolving element, substantially as set ort 2. A ray-tube, and a compound terminal arranged therein anol comprising a shell of gasabsorbing material and a mass of gas-evolving material inclosed in said shell, substantially as set forth.

3. A raytube, a compound terminal arranged therein and comprising a gas-absorbing and a gas-evolving element, and an ex ternalelectrical connecting means common to both of said elements,substantially as set forth.

4. A ray-tube, a compound terminal arranged therein and comprising a shell of gasabsorbing material and a mass of gas-evolving material inclosed in said shell, and an external electrical connecting means common to both of said gas-absorbing and gas-producing materials, substantially as set forth. I

5. The combination of a ray-tube having anode and cathode terminals, and a compound terminal arranged therein and comprising a gas-absorbing and a gas-evolving element, substantially as set forth. 6. The combination of a ray-tube having anode and cathode terminals, and a compound terminal arranged therein and comprising ashell. of gas-absorbing material and a mass of gas-evolving material inclosed in said shell, substantially as set forth.

7. The combination of a ray-tube having anode and cathode terminals, a com pound terminal arranged therein and comprising a gas absorbing and a gas-evolving element, and an external electrical connecting means common .to both of said elements, substantially as set forth. I

8. The combination of a ray-tube having anode and cathode terminals, a compound terminal arranged therein and comprising ashell of gas-absorbing material and a mass of gas evolving material inclosed in said shell, and an external electrical connecting means cornmon to both of said gas-absorbing and gasprodueing materials, substantially as set forth. Signed at Chicago, Illinois, this 6th day of September, 1904:.

. ROBERT FRIEDLANDER. Witnesses:

ROBERT BURNS, M. H. HOLMES.

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