US1992335A

US1992335A - Shock-proof X-ray tube unit

Info

Publication number: US1992335A
Application number: US649583A
Authority: US
Inventors: Tietig Chester
Original assignee: KELLEY KOETT Manufacturing Co
Current assignee: KELLEY KOETT Manufacturing Co; KELLEY-KOETT MANUFACTURING Co
Priority date: 1932-12-30
Filing date: 1932-12-30
Publication date: 1935-02-26
Anticipated expiration: 1952-02-26

Description

C. TIETIG SHOCKPROOF X-RAY TUBE UNIT 2 Sheets-Sheet 2 Feb. 26, 1935.

Filed Dec 30, 1932 IN/VENTORI Patented Feb. 26, 1935 UNITED STATES SHOCK-PROOF X-RAY TUBE UNIT Chester Tietig, (loving'ton, K'y., assignor to Kelley-Koett Manufacturing Company, Covington, Ky., a corporation of Ohio Application December'30, 1932, Serial No. 649,583

10 Claims.

This invention relates to a shock proof X-ray tube unit.

Among the objects of the invention is the provision of an oil immersing means for the X-ray tube, the oil supply which is first run thru a hollow anode of the X-ray tube so that the coldest oil is available'at the spot that needs the greatest cooling effect. Another object is to provide a construction in which X-rays may freely leave the tube without passing thru oil, even tho the tube be immersed. Another object is to provide secure insulation for the high tension leads without using any other means to insulate them than the oil delivery means. Still another object is to provide general insulation for the X-ray tube that is X-ray proof,. of high dielectric strength, and protected against thermal cracking but still permeable to ordinary light.

In the accompanying drawings, Fig. 1 is a sec tional side elevation of my device.

Fig. 2 is a projection of Fig. 1 taken along the line 2-2 thereof.

Figs. 3 and 4 are plan and end views respece tively of beads used to separate wires from each other or from the walls of rubber tubing.

In the drawings 10 is a rectangular or cylindrical vessel made preferably of lead glass but per- Qmissibly of metal. The vessel 10 has acover 11,

the removal of which gives an opening ample to admit the X-ray tube 12. Screws 13 or other fastening means are provided to hold the cover in oil-tight relation, with the help of gasket 14, to the vessel 10. v

At each end of the vessel is a projection 15 by which vessel 10 may be rotatably held in an ordi-. nary tube holder. At the bottom of vessel 10 I there is a circular or other shaped window 16,

the closing of which is effected by the X-ray tube itself and optionally by the aid of a thin aluminum filter gasket 17. The gasket and filter are held in an annular channel 18 provided therefor. l

The X-ray tube itself is preferably of the shape shown, altho conventionally shaped Coolidge or gas-containing tubes are also adapted to be used,

A rubber cup 23 is also placed inside projection 15 and the cathode end of the tube supported againstit.

The cathode leads 24 are introduced thru a glass seal 25 in an oil-tight and gas-tight manner directly thru the glass neck of the X-ray tube to the filament supporting wires 26. They are bare but are held separate by glass or bakelite beads 27. In order that these beads may not entirely obstruct the flow of oil in the rubber tube 31, thru which they are led, they are made longer than they are wide. The plan View of one of them is shown in Fig. 3 and an end view in Fig. 4. They form no part of my invention and may be omitted if the voltages employed are not excessive.

The anode 28 is a hollow coppe cylinder hearing a tungsten target 29 on its face. The anode is cementedto the tube at the neck 30 in a gastight manner. 1 At the rear of the anode there is a heavy nut 32 which is threaded and soldered to theanode. Centrally, this nut supports a metal tube 33 which extends almost to the inner face of target 29. The rear end of thistube is preferably turned upward. Nut 32 is perforated with many holes 34 which are parallel to the tube 33. The anode lead 35 is soldered either to the tube 33 or to nut 34.

. Attached to glass or metal connections 36 in the lid 11 are oil-proof rubber tubes 31, each of which contains one or more electric leads 24 or 35. Two high tension leads of opposite polarity are not however, carried in the same tube. The rubber tubes lead to a pump 37 in the preferred construction, which pump may be connected to a cooling reservoir 38 alsoin the circuit. .The electrical leads do not enter the pump or thereservoir, but are taken out thru the walls of the rubber tubing thru an oil-tight joint (not shown). If this joint is a sufficient distance from the pump and reservoir, the two latter do not have to be insulated. A cooling reservoir may be sometimes dispensed with.

The oil is circulated by the pump so that the hot oil from the cathode lead tube is drawn first into the pump, then pushed into the cooling reservoir and thence to the anode lead tube. It enters tube 33, cools the rear face of target 29,

then flows out of holes 34 into vessel 10. It leaves the vessel again thru the cathode lead.

Under certain conditions of operation a pump may be dispensed with. The rubber tubes from both ends of the vessel 10 may be connected together at a point remote from where the electrical leads leave the rubber tubing. Convection circulation is thus relied upon. This arrangement is satisfactory only when the X-ray tube is op-- gas bubbles formed from volatized'oil will then be able to leavethe anode by rising so that the system will not become gas bound.

Instead of liquid used in the system, a gas may be employed. Either air or hydrogen is suitable. The pump may then be replaced by a fan.

The oil-proof rubber herein mentioned is preferably the substances known as 'I'hioko or Du Prene, but may be any other oil resistant rubberlike substance, providing it is a good electrical insulator.

NI claim:-

1. A shock-proof X-ray tube unit comprising aux-ray tube having a hollow anode, and a cathode, a target in said anode, a tube adapted to deliver a liquid to a. point immediately behind the target, means for supporting said liquid delivery tube, said means also being adaptedv to allow passage of the liquid out of the anode, the usual anode and cathode leads connected respectively to the anode and cathode of said X-ray tube, a vessel of substantially larger size enclosing said X-ray tube, a window in said vessel for the emergence of X-rays, an insulating and cooling liquid in said vessel, a gasket for preventing the leakage of liquid from the vessel around the window therein, ports in said vessel for the admittance of conductors to the interior. thereof, oil-proof rubber tubes in communication with said ports, a conductor in each of said rubber tubes, said conductors being respectively continuations of aforesaid anode and cathode leads.

2. An X-ray tube unit according to claim. 1 having in addition a pump, a cooling unit and connections between the pump, the cooling unit and the tube unit for the circulation of liquid therethru.

3. In an X-ray tube unit an X-ray tube, a duct for delivering a cooling and insulating liquid to the rear of the target of said .tube, a vessel enclosing the tube and permitting accumulation of said liquid about said tube and two flexible, electrically insulating, wire containing conduits together adapted to conduct electricity and liquid to and from said tube and thru said enclosing and accumulating vessel.

4. An X-ray tube unit according to claim 3, having in addition pump and pump circuit for the liquid, a cooling reservoir for the liquid, in

said pump circuit, the flexible electrically-insulating wire-containing conduits being arranged to-be parts of said pump circuit.

5. A shock-proof X-ray tube .unit comprising an X-ray tube, a vessel enclosing the same, a hollow anode therefor, a fluid supply means extending well into the anode for supplying a fluid having cooling and insulating properties to the interior of the anode of said tube, means for supporting the fluid supply means within the anode, said means permitting the escape of said fluid from the anode interior to the said enclosing vessel, and ducts for the ingress and egress of insulatingand cooling fluid to the enclosing vessel, each of said ducts housing at least one conductor for delivering current to the- X-ray tube.

6. An X-ray tube unit according to claim 5 having in addition a cooling means, means connected between the outer ends or the beforementioned ducts and in circuit with the cooling means for circulating the fluid supplied to the anode and to the vessel thru said cooling means and thence back to the anode.

7.' A shock-proof X-ray tube unit comprising an X-ray tube, a hollow anode therefor, a vessel of substantially larger size enclosing the tube,v

a duct mounted within the anode for supplying a current of a liquid having coolingand insulating properties to the interior of the anode of said tube, means for supporting said duct, said means having an opening for permitting the escape of said fluid from that end of the anode which generates no radiation, a plurality of oil proof rubber tubes'arranged to conduct liquid to and from the enclosing vessel, and at least one conductor arranged within each of said tubes and within said liquid to supply electric current to the said X-ray tube.

8. An X-ray tube according to claim 7 having in addition a cooling means and mean. in circult therewith for circulating the liquid supplied to the anode and to the vessel thru said cooling means and thence back to the anode.

9. A shockproof X-ray tube unit comprising an X-ray tube, a hollow anode therefor, a cathode therefor, a tube extending Well into said hollow anode, a multi-perforated stopple or nut supporting said tube in said anode, a flexible oil proof rubber conduit connected to said anode tube, a vessel of substantially larger size surrounding said X-ray tube and enclosing the same bodily said vessel having ports for the ingress and egress of liquid and a port for the emergence of X-rays, means within said vessel for supporting said X-ray tube, flanges on the edges of the said liquid ingress and. egress ports, one or more metallic conductors to the cathode and one conductor to the anode, extending thru said thesaid enclosing vessel, 2. pump and a cooling reservoir connected in series with each other and with the otherwise free ends of said oil.

proof flexible tubing and a filling of insulating oil in said flexible oil proof tubes and the said vessel enclosing the X-ray tube.

10. An X-ray apparatus comprising a container, an X-ray tube mounted therein, and including a cathode and a hollow anode, means cooperating with said anode for conducting a cooling and insulating fluid to and from the interior thereof, a second means for conducting said cooling and insulating fluid, said second mentioned means being in fluid communication with said container and first mentioned means, electrically conductive means connected to said cathode and anode and extending into said second mentioned means, said container, the interior of said hollow anode and said second mentioned means being provided with a cooling and insulating fluid. v

' CHESTER .TIE'IIG.