US2315786A

US2315786A - grobe

Info

Publication number: US2315786A
Authority: US
Publication date: 1943-04-06
Anticipated expiration: 1960-04-06

Description

April 6, 19,43. .1. J. GROBE` TUBE CASING AND 'SUPPORT` Filed May 20, 1939 4 Sheets-Sheet l NVENT ATTORNEY 5.

April 6, 1943. '.l. .1. GROBE.

` TUBE cAsING'AND SUPPORT F11-ed May 2o, 1939 4 Sheets-Sheet 3 April 6, 1943. J. J. GROBE l TUBE cAsING AND SUPPORT Filed May 20, .1939 4 Sheets-Sheet 4 ATTORNY.

Patented Apr. e, 194s UNITED STATE@ 'i 1,

it?? OFFICE TUBE CASING AND SUPERT Application May 20, 1939, Serial No. 274,778

(Cl. Z50-57) 14 Claims.

My invention relates in general to electrical apparatus, especially high potential apparatus, and has more particular reference to a shockproof casing and support means for X-ray tubes.

An important object of the present invention is to provide improved light-weight support means for X-ray tube apparatus; a further object being to embody the support as a casing having facilities for mounting an X-ray tube therein in readily removable fashion so that the tube, when mounted in the casing, is thoroughly insulated in shock-proof fashion.

Another important object is to provide a lightweight compact support for X-ray tubes, comprising a casing in which the tube may be mounted in position immersed in a suitable insulating liquid, including means for maintaining the casing portions containing the tube entirely lled with the insulating liquid, the tube mounting withal being light in weight and compact and by the same may be readily shifted to desired positions with respect to a subject to be exposed to the action of the X-light generated by the tube.

Another important object is to provide a lightweight adjustable mounting for the tube carrier whereby the same may be shifted easily to any desired position with respect to a subject being treated and tilted on the mounting in order to adjust the direction toward the subject of X-light emitted by the supported tube.

Another important object resides in providing index means for indicating the relatively tilted position of the mounted X-light generator.

Another important object resides in providing improved support means for the tube casing whereby the same may be carried at a desired elevation above a table and arranged at any point within the area of the table, the support extending compactly on one side of the table only and comprising a single upright and having the ability not only to support the lamp above the table but allowing the lamp to be positioned beneath the table and also to be swung behind the support away from the table for use independently of the table; a further object being to provide a tube housing of such lightness and compactness as will permit the mounting of the same upon the simplied, extremely compact, multiple-purpose support.

These and numerous other important objects, advantages and inherent functions of the invention will become apparent as the same is more fully understood from the following description, which, taken in connection with the accompanying drawings, discloses a preferred embodiment of the invention.

Referring to the drawings, n

Figure 1 is a perspective View of radiographic apparatus providing an adjustable support for, an X-light generator in accordance with the teachings of the present invention;

Figure 2 is an enlarged perspective view of a casing for an X-light generator forming a part of the apparatus shown in Figure 1;

Figure 3 is a vertical section taken substantially along the line 3-3 in Figure 1;

Figure 4 is a sectional View taken substantially along the line l-fl in Figure 3;

Figure 5 is a sectional view taken substantially along the line 5 5 in Figure 2;

Figure 6 is a sectional View taken substantially along the line 6 6 in Figure 5;

Figure 7 is an elevational View of a cable connector;

Figure 8 is a View of a support bracket;

Figure 9 is a sectional view taken substantially along the line 9-9 in Figure 8;

Figure 10 is a sectional View of washers forming part of the assembly as shown in Figure 8; and

Figure l1 is a face view of an index plate.

To illustrate the invention, the drawings show a compact apparatus for iluoroscopic examination and for radiographic purposes, comprising means forming a support i3 for tiltably carrying a table l5 upon which may be supported a subject for X-ray exposure, a housing l1 for an X-light generator, and mounting means I9 for adjustably supporting the housing and generator contained therein whereby the source of X-light may be adjusted vertically and horizontally with respect to the table l5 and may be tilted to adjust the angularity of the X-light emitted by the generator, While the illustrated apparatus has many novel and convenient features, the present invention is not, of course, necessarily restricted to the particular form of arrangement of its component parts which are shown on the drawings to illustrate the utility of the adjustable support and the enclosed mounting for the X-light generator.

The radiographic apparatus, in Which for purposes of exposition the adjustable support and casing for the X-light generator' are illustrated, comprises the table I5 and the table support I3 on or against which a body may be carried in position to be pictured radiographically or otherwise expo-sed to X-rays.

i5 comprises a panel suitably supported in a The table-like elementl frame 2| which in turn is mounted on the support pedestal I3. This pedestal in the illustrated embodiment comprises a foot portion 22 and an upstanding portion alfording a bearing 23 in which the frame 2| and table I5 are tiltably mounted.

Cooperating means on the frame 2| and the pedestal I3, preferably comprising a rack on the frame and suitable gears on the pedestal drivingly connected with a hand crank, are provided for turning the frame 2| on the pedestal to any desired inclination. The frame 4may be provided with

tracks

29 and 3| along the opposite sides of the frame and under the table top I for guiding and supporting a carriage 33 for longitudinal movement immediately beneath the table top, the carriage being adapted to support a cassette or holder for film sensitive to X-light for the making of radiograms in cooperation with the X- light generator in the casing I1 as a light source. The carriage 33 is freely movable between the opposite ends of the table l5 whereby the film may be positioned in any desired locality within the longitudinal extent of the table, and suitable means 34 for counterbalancing and means 36 for locking the carriage 33 in any adjusted position within the length of the table top are provided.

The radiographic equipment also comprises an X-light generator 35 in the form of an X-ray tube contained in the housing l1, which housing is formed with a window through which X-rays generated in the tube 35 may be projected outwardly of the housing I1, and means is provided for supporting a casing Il' above the table top in position to direct X-light downwardly upon a body supported on the table. The tube in the casing I1 may be energized through suitable cables 31 connecting with the tube within the casing whereby the entire assembly is rendered substantially shock-proof.

The casing I1 is tiltably mounted in a yoke 39 having a stem 4| extending in and supported by a bushing 43, which in turn is carried on an arm 45 extending from an upright 6|, the arm preferably being carried on a pivot '59 in a frame 63 which is slidable longitudinally upon the support 6|.

As shown in Figure 8 the stem 4| comprises a cylindrical member 56 slidingly received in the bushing 43, said member 42 at one end being secured on a disk 44 formed with peripheral notches 45. This disk 44 extends opposite an end of the bushing 43 and has an outwardly extending pin 48 thereon in line with the axis of the bushing 43 and forming a support upon which a collar 52 comprising a part of the yoke 39 is tiltably mounted, said collar 52 having a central opening 58 for receiving the pin 48 and said pin carrying thereon a ber washer 56, a metal Washer 68, and a spring washer 12, the collar 52 and the

washers

66, 68, and 12 being held on the pin 48 as by means of a cap nut 16.

The collar 52 is provided With an offset sleeve 18 preferably formed integrally therewith in position to overlie the notched edge of the disk 44, and said sleeve 18 is fitted with a manually retractable spring pressed detent 82 adapted to lock in the notches 46 in order to secure the yoke and the casing |1 and enclosed tube 35 in predetermined angularly adjusted position on the pin 43, said adjusted positions being determined by the positions of the notches 42 which are preferably such as to hold the yoke 39 in the position shown in full lines in Figure 1 and in positions rotated 75 in either direction and 180 from the position shown in Figure l.

Suitable means, such as a socket 84 in the end of the bushing 43 and a pin 86 on the disk 44 adapted to be slidingly received in the socket is provided for preventing relative rotation of the disk 44 with respect to the bushing 43.

Within the cylindrical extension 42 of the disk 44 extends a preferably cylindrical shell 88 adapted to move longitudinally in the sleeve 42. The case 88 has an opening in its bottom through which projects a stem 92 which is fastened on the disk 44 in position extending within the case 88. This stern 92 has a nut and washer secured on its end within the case 88 in position to hold a spring 94 between the bottom of the case 88 and the washer on the stem 92, said spring encircling said stem and serving normally to draw the case 38 within the bushing 43 toward the plate 44. The open end of the case 3S has a cap 93 threaded therein, said cap having edges overlapping the end of the sleeve 42 and the end of the bushing 43. The spring S4 thus normally retains the plate 44 and the collar 52 of the yoke against the end of the bushing 43. However, the yoke and lamp housing may be drawn longitudinally away from the end of the bushing 43 in order to obtain additional extension in the event that it may be desired to position the lamp above the extreme side edge of the table i5 opposite from the upright 6|. It will be noted, however, that when thus extended, a substantial portion of the sleeve 42 will remain within the bushing 43 to provide adequate support; that the cap 9B when the parts are at maximum extension serves to hold the yoke within the bushing 43; and that when the parts are in normal position illustrated in Figure 8 the stem means 4| does not project outwardly of the bushing 43 sufficiently to. in.- terfere with the free movement of the cables 31 when the yoke is tilted about the axis of the bushing.

The arm 45, it will be noted, extends downwardly from the bushing 43 and thence substantially horizontally to the support bracket G3 in order not to interfere with or crimp the cables 31 when the yoke and casingr Iii is rotated 90 in a counterclockwise direction from the position shown in Figure 1.

The illustrated casing support structure permits the casing to be adjustably tilted in the yoke 39 and be locked in adjusted position :by means of the manually-operable cla-mp member 2|5, and also permits the yoke 39 on the stem 4| to be tilted to any desired angular lposition Within the bushing 43 and locked in predetermined angular relationship by means of the manually-operable latch 82.

The frame 63, on which the arm 45 is pivoted, may likewise be clamped in any vertically adjusted position on the support member 5|, and latching means 5S is provided for the purpose of securing the arm 45 in position on the frame E3 to support the casing I1 rrnly in position. In making radiographic pictures of the subject on the table l5, the tube and its casing may `be secured in position directing the K-light vertically downwardly toward the table top, and the position of the casing l1 may be adjusted laterally of the table top by sliding the stem 4| longitudinally in the bushing 43 when the parts are positioned as shown in Figure 1 of the drawings. The support 6| preferably extends in aV direction at right angles with respect to the plane of the table top, and the bracket -or

carriage

6,3

egairarse affords 'ameans for adjusting the vertlcahdistance between the lamp 'housing |-1 and "the ytop of the table.

The support 6| 'preferably -comprises a reinforced tubular member of sheet' metal forming tracks 65 on its opposite sides for slidingly `cairrying the frame 63 for lon-gitudinal movem'entfon the support. A counterweight valso may-be, 'and preferably is, arranged within the tubular -'support 6| for sliding movement along vinternallydisposed tracks. To this end, the member 6| may 'comprise-a pair of sheet metal plates '62 having flanged ends vsecured together upon Vopposite sides of steel track forming strips65, said strips forming internaltracks for the counterweight 64 and external vtracks for the bracket' 63. The counterweight 64 Vis preferably interconnected with the :bracket 63 by meanscf cords 51 travelling on sheaves 59 at the'opposite ends of the support member 6| whereby to support the frame 63 and the tube-carrying casing |1 at any adjusted position on the support 'and also to facilitate the movement of thetube-carryin-g assembly on the support 6|.

The support 6| and the tube-carrying assembly thereon are mounted for longitudinal as well as lateral movement with respect to the table top i3, and to this end the member 6| is mounted on a frame 19 which in turn is mounted on the table support frame 2| for movement thereon in a longitudinal direction with respect to the table top. To this end, the frame 19 is provided with rollers 8| which extend in -suitable tracks 83 formed longitudinally in the opposite sides of the frame 2|. A suitable counterweightS, longitudinally movable in tracks 81 on the vfra-me 2|, is provided for balancing the weight of the frame 19 -and the tube-carrying elements supported thereby when the table top is tilted from a horizontal position, the counter-weight 85 being interconnected with the opposite sides of the frame 19 by means of cords travelling on suitable sheaves at the opposite ends of the frame 2| To provide for lateral movement of the support 6| and of the lightsource in the casing |1 with respect to the table top, the member 6| is mounted on a bracket 1| forming a part of a sup-port frame 14, comprising preferably a pair of spaced rails 13 extending from the bracket 1| beneath the frame 2| and slidingly received in rollers 15 on the mounting frame 19. The bracket 1| and the member 6| thus are supported for movement with respect to the frame 2i in a direction normal to the direction of movement of the frame 19 in the tracks 8|.

It will be seen that the member 6| extends below the bracket 1| and substantially beneath the table top, and this arrangement permits the-tube casing |1 to be positioned beneath the table in the position illustrated in dotted lines in Figure 3 of the drawings. This is accomplished by unlatching the fastener 56, swingingr the arm 45 into the position. shown in dotted lines at ||1 in Figure of the drawings and then forcing the frame E3 downwardly along the upright 6| to bring the arm below the frame 14. The lamp in the casing |1 may then be inverted by turning the 1a xnp housing and yoke in the bushing 43, after which the arm 45 may be swung beneath the table to position the housing under the frame 14, said frame having preferably an annular seat 54 io receive the rim 4'9 of the housing 25 defining the X-light transmitting portions thereof. By raising the arm 45 on the member 6| after the casing |1 has been positionedopposte the seat 54, the

scopic examination.

casing-|1 :'may'ibe snuglyrengaged in the f'seat 54 to hold the same innposition, as shown indotted lines at -'3I'1 in Figure 3 `to project X-light upwardly through the tabletop and througha body supported thereon forV uoroscopic examination.

As a'convenience Fin positioning the device in the 4dotted .position 311, I preferably provide a mounting at the Abottom of the member 6| upon which is rrarried a spring pressed buffer 98, the buffer-comprising a pin inthe mounting around which is carried a helical spring with the end of 'the spring extending above the end of the pin arid'carrying a preferably rubber bulfermember Yattached to the spring. The buffer faces toward the lower end'of the frame 63 and the parts are-'so positioned that as the frame engages the buffer vand the buffer spring is compressed, vthe frame v(i3 will tbe resiliently supported on the upright' 6| so that the arm 45 with vcasing |1 inverted thereon need merely be swung into position beneath the seat 54. Thereupon, the latch means 56 'will operate to secure the arm 45 on the frame, and as the latch so locks the arm 45 in position, the frame 63 may be released and forced by the action of the spring pressed means 98 upwardly on the member 6| to force the casing yieldingly upon the sea-t 54. The latch 56, as shown in Figure 4, comprises a pin |8| set in the arm 45 at the upper end of thebearing 59 in position to be received in one or other of a pair of notches |83 formed in an extension |85 at the upper end of the sliding bracket B3 When the pin |8| is in one of said notches |33 the arm 45 'will occupy the position shown `in full lines, shown in Figures 1 and 3 in the drawings.` When the pin |8| is inthe other of said notches |83 the arm will occupy the p0- sition 2|1 shown in dotted lines vin `ligure 1 of the drawings. The pin 18| may be Vlocked and thus retained in either of the notches by means of the latch member 56, which comprises an arm pivotedas at |81 o'n the frame 63 midway between the notches |83. This pivoted arm has oppositely extending fingers |83 of cam-like shape so that if the arm 45 is swung toward one of the notches while they latch 56 is in latching position, the pin |8| may enga-ge upon the camlike fingers |89 and tilt thelatch 'member 56 upwardly on its pivot to uncover the notch and permit the pin |8| to enter the vsame beneath the raised latch. After the -pin thus has entered they notch, the latch of its own weight will vdrop biehind thepin into locking position. A ysuitable screen 5| is provided for fluoro- This screen is mounted on an arm |53 pivoted as at |55 on the bracket 1|. Suitable spring and latch means are provided in a housing |51 to normally hold the screen in an inoperative position as shown in Figure 1. The screen, however, may be swung down over the table top when needed 'for iiuoroscopic work. The frame 14 adjacent the seat 54 may be provided with a shutter actuated by a control table |6| under the control of suitable actuating means |59 conveniently located on the arm |53 adjacent the Vscreen |5|.\

, The arm 45 may also be swung from the position 'shown in Figure 1 to a position 2|1 behind the vertical support member 6|`in order to permit the use of the lamp in the casing |1 for radiographic and fluoro'scopic purposes, independently of the table, and when kso positioned, of course, the casingmay be tilted in the bushing 43 to any desired angularity.

It will be seen from 'the foregoing that the apparatus may be readily adjus'ted to position the light source in the casing I1 at any desired elevation above any desired point within the area of the table top; that the light source also may be positioned below the table top and also in position behind the upright 6| for independent use. This facility is accomplished not only by the simple -counterbalanced support means afforded by the movement of the bracket 63 on the upright 5| and by the neat, compact arrangement of the support arm 45 and the bracket 39, but the flexibility of the apparatus is in no small measure due to the provision of the light-'Weight shockproof casing |1 in which the tube 35 is supported. Were it not for the unusual lightness of the casing, which in part is due to its particularly compact design, great difficulty would be encountered in supporting the lamp with suflicient rigidity at a point remote from the upright 6| to permit effective operation of the lamp for radiographic and iluoroscopic purposes. The features of the invention, however, pertaining to the light-weight and compact construction of the housing I1 allow the same to be mounted on the support means heretofore described, which support means may conveniently be designated as an overhung beam support in that the weight of the supported parts is carried entirely on and through the upright 6| which in turn is carried entirely at one side of the table. The entire arrangement provides a compact equipment in which one side, both ends, and a substantial portion of the remaining side of the table onwhich the support -GI is positioned are entirely free and unobstructed. `This is al valuable feature that will be greatly appreciated by roentgenologists. t

As heretofore stated, the manifold advantages and simplicities of the equipment herein illustrated and described are made possible -in part by the novelties of design and construction of the casing |1, whichV comprises a housing 25 preferably formed as a casting of light-weight metal and affording-an elongated preferably cylindrical cavity 21 in which the X-ray tube'35 may be assembled, the ends of the cavity 21 being open to facilitate insertion of the` tube therein, and covers 41 comprising plates of lightweight metallic material are provided for sealing the open ends of the cavity 21 after the tub has been mounted in the cavity.

The housing 25 is provided with an opening 48, the outer walls of the housing being formed with an annular rim 49 at said opening, and the opening within said rim is closed by a plate 5I of material freely pervious to X-light. The tube 35 may comprise the usual sealed envelope 53 in which is arranged a cathode 93 and an anode 95 adapted to function asa source of X-rays when bombarded with electrons emitted by the cathode. Within the cavity 21and encircling the tube 35 when in place, and particularly the central portions thereof, is arranged a cylindrical sleeve 91 of lead or other material impervious to X-light, said sleeve 91 having an opening 99 therein in position coinciding with the casing opening 48, and the tube is preferably supported adjacent the inner end of a cone of X-light pervious material extending in the opening 48 between the tube 35 and the plate 5|, said cone being preferably formed integral with saidplate and. its inner tbe facing surfaces being equally spaced at al1 points therein from the facing portions of the tube 35.

The inner surfaces of the-opening 48 also are cavity 21. These chambers |01 are closed at one end by walls |09 forming a continuation of the walls of the cavity 21, so that the chambers |01 communicate with the cavity 21 approximately opposite the ends of the tube 35. Other ends of the chambers |01 are formed with openings defined by seats III, in which are sealed socket members 3 preferably of insulating material,

extending within the chambers |01 from the open ends thereof to a point opposite the ends of the tube 35. 'I'hese socket members provide leak-proof covers for the open ends of the chambers |01 and are adapted to receive the terminal ends of the anode and cathode cables 31, and to make connection between the several conduc tors of the cable and terminals |35 and |4| at the bottom of the cable socket members H3.

The socket members ||3 at their inner ends carry bracket means I5 for supporting the tube 35. The socket member ||3 at the anode end of the casing is provided with a bracket member |2| having a portion |23 carrying a headed screw |21 in position opposite a projecting element |25 atthe anode end of the tube, said projecting element being electrically connected with the anode and being "provided with a diametral slot to receive the member |21 as the 'tube is inserted from the cathode end of the casing. The socket member ||3 at the cathode end' of the casing carries a bracket member I I6 on which`is secured 'a plate ||9. The' plate I9 is adapted to be removably fastened on the cathod end of the tubeby means ofa screw I 8. The plate I9 is rst attached on the tube and inserted with it into'the casing. The plate has a pair of openings to receivedowels |22 on the bracket IIB, and the plate has an opening |24 to take`a holding screw for fastening the plate to thel The electrical connection between the anode and its corresponding cable'31 is accomplished through the bracket |2| andthe terminals 35 and |4| with all of the conductors ci the anode cable. Electrical connection with the cathode is accomplished by means of the cathode leads |29, which may be connected on an insulatedterminal block |3| carried by the plate ||9. Afterinsertion of the tube in the casing conductors |33 may be connectedbetween the terminal block and the terminals |35 disposed in the ends of the cathode socket member I3 which preferably is formed of insulating material.

The cables 31 preferably comprise heavily insulatedconductors, the ends of the cable being ttedin a jack 4member |31 carrying prongs |39 which are adapted to make Contact with the terminals |35 when the jack member |31 is inserted in the socket member ||3. The jack member |31 preferably comprises three prongs |39, at least one of which is of a size different from the others so that the jack |31 may b e inserted in one positiononly to make proper contact between the prongs |39 and the terminals |35. One of the prongs |39 also fits a terminal |4| which is grounded on the bracket ||1 and hence connected through the plate ||9 with the cathode structure in the tube 35.

The yoke 39 has a pair of arms extending outwardly and forwardly of the collar portion 52, the terminal portions of the arm forming split cap bearings 205 in which the flanges |9|, faced with the steel band 20| at the opposite ends of the casing, may be received. The cap bearings are provided with index marks 201 on opposite sides thereof to cooperate with the graduated dial plate 209, shown in Figure 11, the edges of which are graduated to indicate the angularity of the casing in the bearings 205. The index plates 209 are mounted upon the cap plates 41 over the filler plugs 95 by means of set screws penetrating openings 2| formed in the index plates, said set screws threading into embossments 2|3 formed on the cover plates 41 preferably adjacent and within thel annular iianges |9| One of the cap bearings 205 is provided with a manually operable clamp knob 2| 5 in order to clamp the housing I1 in angularly adjusted position on the yoke 39, the other cap bearing being fastened to a predetermined snugness on its cooperating flange |9| by suitable screws 2|9 which may be locked in place by means of set screws 22|.

It will be seen that the casing forms a sealed leak-proof enclosure for the tube 35 which, however, may be readily replaced by removing the covers 41. light in weight. The arrangement of the chambers |01 in position extending alongside of the cavity 21 provides an exceedingly compact unit and aids in reducing the weight of the casing. It is intended that the casing shall be lled with an insulating fluid such as oil in order to aid in insulating the tube 35 by oil immersion. To this end, means |43 forming an oil reservoir is attached on the casing, said reservoir preferably comprising an expansible member |45 sealed at one end on a tubular fitting |41 which is threaded in an opening |49 formed in the wall of the casing 25 between the open ends of the chambers |01 whereby the interior of the expansible means |45 is in communication at all times with the interior of the cavity 21. Y ielding means preferably comprising a helical spring |63 is provided in position normally to compress the housing |45 so as to maintain the cavity 21 and the chambers |01 around the sockets ||3 completely filled with lnsulating oil. The springv and the expansible means |45 may be enclosed in a shell-like cover |61 having an open end adapted to be secured on a rim |59 formed on and ending outwardly of the housing 25.

In order to release the pressure of the spring |63'when filling the casing with oil, I provide a threaded stem |54 adapted' to bethreaded into The casing, however, is compact anda collar 56 in the end of the expansible member. This stem has a nut |55 adapted to be tightened on the stem to retract the spring to any desired degree, and gage marks may be provided on the nut and cover in order to indicate the expansion of the reservoir and consequently the amount of liquid that-may be charged into the casing. The

amount of liquid will vary to some extent with the mean temperature in which the device is set up for operation.

It is thought that the invention and numerous of its attendant advantages will be understood from the foregoing description, and it is obvious that numerous changes may be made in the form, construction and arrangement of the several parts without departing from the spirit or scope of the invention, or sacricing any of its attendant advantages, the form herein described being a preferred embodiment for the purpose of illustrating the invention; and I do not herein claim the tube casing |1 per se, since the same forms the subject-matter of my co-pending application, Serial No. 345,534, filed July 15, 1940, for Tube casing and support.

The invention is hereby claimed as follows:

l. A mounting for an X-ray tube comprising an elongated support member, and mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member and for swinging movement with respect to said support member whereby the tube may be positioned at will on one side of the support member within the area of a normal projection of said table and outwardly of said area on another side of said support member.

2. A mounting for an X-ray tube comprising an elongated support member, a table, means to mount the support member at one side of the table, mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member and for swinging movement with respect to said support member whereby the tube may be positionedat will on one side of the support member within the area of a normal projection of said table and outwardly of said area on another side of said support member,-and means to mount the tube on said mounting means for tilting movement about a plurality of axes.

3. A mounting for an X-ray tube comprising an elongated support member, a table, means to mount the support member at one side of the ta ble, mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member and for swinging movement with respect to said support member whereby the tube may be positioned at will on one side of the support member within the area of a normal projection of said table and outwardly of said area on another side of said support member, said mounting means comprising a frame longitudinally movable on the support member, an arm pivoted on the frame for swinging movement about said support member, and tube carrying means on said arm.

4. A mounting for an X-ray tube comprising'A an elongated support member, a table, means to mount the support member at one side of the table, mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member and for swinging movement with respect to said support member whereby the tube may be positioned at will on one side of the support member within the area of a normal projection of said table and outwardly of said area on another side of said support member, said mounting means comprising a frame longitudinally movable on the support member, an arm pivoted on the frame for swinging movement about said support member, and tube carrying means on said arm, said tube carrying means comprising a yoke carried by said arm for tilting movement thereon about a. tilting axis.

5. A mounting for an X-ray tube comprising an elongated support member, a table, means to mount the support member at one side of the table, mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally oi the support member and for swinging movement with respect to said support member whereby the tube may be positioned at will on one side of the support member within the area of a normal projection of said table and outwardly of said area on another side of said support member, said mounting means comprising a frame longitudinally movable on the support member, an arm pivoted on the frame for swinging movement about said support member, tube carrying means on said arm, said tube carrying means comprising a yoke carried by said arm for tilting movement thereon about a tilting axis, and means to support the tube on said yoke for tilting movement about an axis other than said tilting axis.

6. A mounting for an X-ray tube comprising an elongated support member, a table, means to mount the support member at one side of the table, mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member and for swinging movement with respect to said support member whereby the tube may be positioned at will on one side of the support member Within the area of a normal projection of said table and outwardly of said area on another side of said support member, said mounting means comprising a frame longitudinally movable on the support member, an arm pivoted on the frame for swinging movement about said support member, tube carrying means on said arm, said tube carrying means comprising a yoke carried by said arm for tilting movement thereon about a tilting axis, and means to support the tube on said yoke for tilting movement about an axis other than said tilting axis, comprising a tube casing enclosing the tube and forming bearing means for tiltingly supporting the casing in said yoke.

7. A mounting for an X-ray tube comprising an elongated support member, and mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member, said elongated support member comprising a tubular casing formed with an inwardly extending rib longitudinally of the support, and forming an internal track for a counterbalance weight. i

8. A mounting for an X-ray tube comprising an elongated support member, and mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member, said support member comprising a tubular` casing formed with an outwardly extending rib longitudinally ofthe support member and forming an external track on the support member for said mounting means.

9. A mounting for an X-ray tube comprising an elongated support member, mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member, said support member comprising a tubular casing formed with an inwardly extending rib longitudinally of the support member and forming an internal track for a counterbalanced weight, said tubular casing being also formed with an outwardly extending rib longitudinally of the support member and forming an external track for said mounting means, and connections between said mounting means and said counterbalanced weight,

1). A mounting for an X-ray tube comprising an elongated support member, and mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member, said support member comprising a pair of sheet-metal channels having opposed edges interconnected to form a tubular shell, said edges being interconnected with track forming members having portions extending inwardly and outwardiy of said shell to form internal tracks for a counterweight and external tracks for said mounting means, and means comprising sheaves at the opposed ends of said support member carrying iiexible means interconnecting the counterweight and said mounting means.

l1. A mounting for an X-ray tube comprising an elongated support member, a table, carrier means to mount the support member at one side of the table, and mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member, said mounting means being swingable on and about said support member whereby to dispose the tube in position within the area of the vertical projection of the table and in position outwardly of said area, said support member. having portions extending above and also below the plane of said table.

l2.. A mounting for an X-ray tube comprising an elongated support member, a table, carrier means to mount the support member at one side of the table, mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member, said mounting means being swingable on and about said support member whereby to dispose the tube in position within the area of the vertical projection of the table and in position outwardly of said area, said support member having `portions extending above and also below the plane of said table whereby said tube may be disposed above the table and also may be positioned beneath the table, said mounting means comprising a tube casing, and means on said carrier frame forming a socket for receiving said casing beneath said table.

13. A mounting for an X-ray tube comprising an elongated support member, a table, carrier means to'mountr the support member at one side of the tabla-mounting'means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member, said mounting means being swinglable on and about said support member whereby to dispose the tubein position within the area of the vertical projection of the table and in position outwardly of said area, said support member having portions extending above and also below the plane of said table whereby said tube may be disposed above the table and also may be lpositioned beneath the table, said mounting means comprising a tube casing, means on said carrier frame forming a socket for receiving said casing beneath said tabie, shutter means on said carrier means at said socket, a uoroscopic screen tiltably mounted on the support member and positionable thereon to overlie the table, and remote control means for said shutter means disposed on the support member and operable thereon adjacent said screen.

14. A mounting for an X-ray tube comprising an elongated support member, a table, carrier means to mount the support member at one side of the table, mounting means for carrying said tube on and in spaced relationship with respect to said support member for movement longitudinally of the support member, said mounting means being swingable on and about said support member whereby to dispose the tube in position within the area of the vertical projection of the table and in position outwardly of said area, said support member having portions eX- tending above and also below the plane of said table whereby said tube may be disposed above the table and also may be positioned beneath the table, said mounting means comprising a tube casing, means on said carrier frame forming a socket for receiving said casing beneath said table, shutter means on said carrier means at said socket, a uoroscopic screen and a bracket carrying said screen turnably on the support member in position to overlie said table, and remote control means for said shutter means disposed on and operable at said bracket.

JULIUS J. GROBE.