US2001004A - wantz - Google Patents

Description

y Y J. B. WANTZ 2,001,004

X-RAY TUBE HOLDER Filed Aug. 30, 1950 4 Sheets-Sheet l 5o 50 ra M 48 IN VEN TOR May 14, 1935. l 5, mm zmmm X-RAY TUBE HOLDER Filed Aug. 30. 1950 4 Sheets-Sheet 2 May 14, 1935. J. B. WANTZ X-RAY TUBE HOLDER Filed Aug, 30, 1930 4 Sheets-Sheet 3 .4 TTO EY May 14, m. J. B. WANTZ 2,m1,004

X-RAY TUBE HOLDER Filed Aug. 30, 1930 4 sheets sheet 4 FIG] FIE- .4- E50: 58

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57 QZY IN VEN TOR ATTO EY Patented May 14, 1935 PATENT OFFICE i 2,001,004 X-RAY TUBE HOLDER Julius B. 'Wan'tz, Oak Park, Ill., assignor to General Electric X-Rayflorporation, Chicago, Ill., a-corporation of New York Application August 30, 1930, Serial No. 478;:044 8 Claims. (cram-s4) The present invention relates to- Xray at paratus and hasparticularly to do with a supportingstandrfor an X-ray'tube and the mechanism associated therewith.

Rapid strides are being made in the X-ray art. Unification of the apparatus connected therewith is being bad. Marked improvement in X-ray apparatusstructure giving greaterflexibility to such apparatus and producing finer results is being obtained.

With the. introduction of oil immersion for X- ray tubes and transformers-a tubebeing contained in a head? the whole technique of the X-ray. art has been modified and has been changed to such an extent'that new, improved and different apparatus for holding such oil immersed tubes and their heads has been devised as .a matterlof necessity. While some of the structures now being produced may appearto be quite similar in principle to previously employed apparatus where an X-ray tube was used with its exposed high tension wires, there is a fundamental difference which may not beinstantly perceived or discovered upon a casual 0 examination of a drawing accompanying an application for patent for these improved devices. An X-raytube with its exposed wires and its shield was relatively lightin weight. It was a cumbersome device, however, and there were many limitations to its operation. 'The ever presence of high tension wires in juxtaposition to the patient and the operator, aswell as the in-- adequate protection which the conventional shield afforded from X-light made the Whole apparatus a dangerous mechanism although its utility was omnipresent. 1

With the introduction of heads containing the high tension transformer and X-ray tube, and with the use of oil immersion for cooling and insulating theX-ray apparatus mounted in such a hBZvifiJl' entirely new field of X-ray'development opened. The heads which are employed for containing X-ray tubes and transformers are quitelarge and extremely heavy. The supports for such heads and the apparatus needed for rendering the operation of such heads flexible are wholly different from the supports which could be and were employed in association with the relatively light tube and. lead glass bowl shield thereabout. The changes in the suspension of. the X-ray tube have'led to many changes in the ancillary apparatus. v

, One of the objects of the present invention is 0 to provide a suitable mechanism for association combination of elements shown in the single emwith an X-ray head and which will provide an improved support for said head.

MAnother object of the invention is the provision of a support for an X-ray head whichsupport cooperatively and independently maintains instrumentalities for use in association with such head. 0

Another object of the present invention is an improvement of the present type of support to lend greater strength and increased flexibility Y thereto.

A .furthe'r'object of the invention is the provision of improved manipulatory means for an X-ray head, as well as improved structure for the instrumentalities used in association therewith and for the support thereof.

Other objects of the invention include the improvement of the details of structure of mechanisms associated with X-ray tube head supports, and the accessories supplied for use with anX-ray tube.

These objects and such other objects as may hereinafter appear, are obtained by.the novel structure, unique arrangement, and improved bodiment of the invention illustrated in the accom'panying four sheets of drawings, hereby made a part of this specification, and in which:

Figure 1 is aside elevation of one form of an X-ravapparatus embodying the invention, a part ofthe standards being broken away for compactness of illustration;

Figure 2is a front elevation of the device H shown in Figural;

Figure 3 is a plan view of the device shown in Figures 1 and 2 Figure 4 is a transverse section of the base on the line '4-4 of Figure 2;

Figure 5 is a longitudinal or vertical section through said base;

Figure 6 is a vertical section through brake and release handles used in connection with the standards and base;

Figure 7 is a section through the locking mechanism for holding the head in angular relation to its carriage upon the standards;

Figure 8 is a fragmentary detail in plan view of the carriage lock; 0 0

Figure 9 is a transverse section through a portion of said lock;

Figure 10 .is a fragmentary detail, partly in plan, of the means for locking said carriage in vertical position on said standards- Figure 12 is a front elevation of the locking device illustrated in Figure 10.

Like reference characters are used to designate similar parts in the drawings and in the description which follows.

What is hereinabove and hereinafter referred to as a head comprises a tank I5 and a cover l6 within which an X-ray tube and its high tension and filament transformer are disposed. Upon the tank l5 may be mounted a shutter mechanism (not shown) of conventional structure and through such cover I6 is a window ll, not clearly shown, but of material transparent to X-light as is conventionaL- Such a head E5 in the present apparatus, in-.

cludes an X-ray tube, not shown, a high tension transformer for such tube, and a transformer for filament current for said tube. The tube encased in such head generally comprises the well-known hot cathode (Coolidge) type of tube. Suitable conduits and connections are arranged intermediate .the several named parts, the control of the tube being from the outside of the tube head. 7 I

There are no high'tension conduits external to the tank portion of said head. By insulatory measures. and grounding the head is maintained at ground potential and is wholly free fromthe danger of shocking a patient or attendant.

At each side of the tank l5 which is ribbed at it to provide for rapid radiation of the transformer and tube heat, are two bosses 28 and'2l. The bosses 26 and 2| provide journals or axle like supports whereby the entire head is supported upon a bifurcated member 22 having a shank23 extending into a frame support, best shown in Figure 3.

The arms of said bifurcated member 22 may be intermediate the stout shank 23 which is centrally disposed of the arms 24 and 25 of said bifurcated member 22, said shank 23 providing a shaft disposed horizontally in a cross member or yoke 28 which forms the front part or the .front transverse member of a rectangular carriage (see Figure 3). Said shank 23 is adapted to be rotated in a boss 21' in said transverse member 26, there being in said boss two bushings 28 providing journals for the rotation of said shank 23. On said shank 23 adjacent said bushings are collars 29 and 36 .to prevent axial displacement" of said shank.

Intermediate said bushings 28 which are secured in position by screws, as shown, or in some other suitable manner, and about the shank 23 is a friction ring 3|. This has an aperture 358, truly round with clearance,. therethrough, and in which shank 23 may freely rotate when no force isapplied to the ring to 1 cause a portion of its suriace to engage said shank 23. 1

At one side, said ring 3! has a boss 33 and a sleeve 34. Secured therein, for rotation, is a threaded shank 35 which is mounted for rotation without axial movement in the top section of transverse member 26. The threads on said shank 35 extend into said sleeve 34 which has a complementally threaded portion to cause said ring 35 to be drawn upwardly when shank 35 is rotated in one direction by handle 36 secured thereto and forced downwardly when said handle is moved oppositely. The under portion of the secured end ofhandle 36 is adapted to ride on a horizontal section (boss 21) 75 of the transverse member 26.

When drawn upwardly ring 3i engages at the under surface of aperture 32 the under surface of shank 23 whereby to prevent relative movement of said shank 23 to said transverse member 26. When lowered, ring member 3! disengages itself from close contact with member 23 so that the shank 23 and the head supported by bifurcated, member 22 may be rotated on a horizontal axis and relatively to transverse member 26.

The remainder of the rectangular carriage of which member 26 is the front member includes a transverse back piece 31 and two tubular or side members 38 and 39 which extend from enlarged portions or bosses upon the front transverse member 26 to the rear transverse member 31 in both of which the rods are firmly anchored. At one side of member 31 is an extension 4ll, and on the same side of transverse member 26 is a rod support 4|. The ends of said tubular members or bars 38 and 39 are securely fastened in said front transverse member 26 after extending through the bosses at the sides of said front member. A counterweight 42 may be secured to member 31.

For maintaining said head and the supporting members therefor at a desired and selected elevation above a patient, or a table upon which a patient is disposed, or in proper relation to a vertical panel used in association with a patient, there is provided a movable stand which supports the rectangular frame.

For flexibility just described, such movable stand is disposed upon a track or fixed base on which it may ride.

The fixed base for the device comprises end members 43 and 44, transverse members 45, two parallel rails 46, and an ancillary rail 41. The transverse members 43 and 44 have at each end a flat shoe 48 which is threaded into lugs 49 at the outside thereof. The lugs 49 are threaded vertically and the shanks 50 on the adjusting members extend therethrough.

Rotation of a shank 50 changes the relative position of the adjusting member to the lug 49 whereby to take care of an unevenness in the floor or other supporting plane. Such an adjusting member is at each side of the end members 43 and 44.

Each of the end members 43 and 44 has a lug portion 51 to surround the standard supporting rails 46 and the supporting rails 46 are secured therein by any suitable means.

The transverse intermediate members 45 comprise lug portions 58 the top side of which engages a fraction of the under surface of the rails 46. From each of the transverse members, there is a lateral lug extension carrying an adjusting member similar to that on the end members. In assembly, opposite end members are reversed in position. The ancillary rail 41 is of smaller diameter than the supporting rails 46 and is secured at its under surface by screw or other means to the end members 43 and 44 and the transverse members 45 whereby it is maintained constantly in parallelism with the parallel supporting rails 46.

The movable standard support comprises an H shaped casting 59, having four legs 60, 6!, 62 and 63. One of the legs, 63, is somewhat wider than the other three, 60, 6! and 62. All four of the legs are shaped like inverted Us in cross section, thus forming two sides provid ing journals for axles 66 upon which roller bearings 61 rotate.

" which carry a two part clamp II and a short to casting "'I2.

ter casting 59.

moor-p04 Securedto the H shaped casting 59 or -integral therewith is a cast portion comprising a spider or web having arms I9 which terminate beneathand are secured to the dished cen- Above the casting 59 is a round casting 12 having reinforcing members on its under side rod or shaft I5, both centered with relation Shaft "I passes through a suitableaperture in casting 59 and the spider having the arms I9. A collar I9 is secured at the end of shaft 'I5"'belowcasting 59 and the spider to maintain the upper casting I2 against raisingor tilting in respect to casting59 and to prevent accidental separationof said parts 59 [89 is adapted to be disposed, said smaller standard 99 being parallel with said lar'ger' standard I8. The two standards 18 and 89 combined provide the support for the mobile portions of the I apparatus,-later to be described.

Upon the larger leg63 of casting 59, there is disposed ahousing BI which extends vertically upward. Said housing is suitably secured to theto-p of leg 93. In 'saidhousing 3| there are mounted for rotation therein, one shaft being terminate in handles 94 and 85.

within the other, two shafts 82 and 83 which The smaller I internal and longer shaft 82 is mounted in a threaded seat 96. I h

Suspended to the standards support for move-- ment therewith is abrake shoe 81. This comprises an elongated member having two lugs 88 and 99 extending about but not around the I smaller rail 41. The brake shoe 81 is so mounted that downward rotation of shaft 82-causesthe end thereof to impinge upon a button lug 99 at the top of said shoe whereby to force said shoe 9'! into right frictional engagement with the smaller rail thereby causing said shoe 8'! to become immovable along said rail 41 and concurrently rendering the standardsupport immovable along its supporting rails 46.

The outer shorter and hollow shaft 83 which rotates about the longer shaft 82 and is operated by the lower handle 85, extends downwardly to the top of the lower cas'ting59. There it is supplied with the collar 9| to prevent too great downward movement. To a pin 92 at the side thereof is a link or lever 93. Said hollow shaft 93 is slidable longitudinally on shaft 82 and when it is lifted it concurrently lifts the pin 92 and i at the same time elevates one end of the link 93 just referred 'to.

Said link 93 is pivoted to a stud 94 insaid porting member 98 having a slot 99 to receive,

lever 93. Said supporting member is suitably secured to casting 59, the transverse member including a hub I 99.

The under side of the link 93 engages thehub I99 andthe plunger 95 extends through the link 93 up into such hub I99 where it is surrounded by a spring which extends from the top side of the link 93 to the head PM of the plunger '95.

There are two pockets HJIiand I93 into which the plunger head I91 is adapted to be seated in the upper casting I2. One of these is in the position shown in Figure 1 and the other is at a ninety degree angle therefrom, the movement being clockwise from the position shown in Figure 1. To limit the upper movement of the shaft 93, the pin 92 is adapted to engage a collar I94 secured in housing 81 and surrounding shaft The reason for the two positions of the standardsis that in one position the head may be used over a table while in the other th'ehead may be pushed to one side to allow free access to the table top to allow ready manipulation of the patient.

Stops are arranged to prevent the movement of the upper casting more than ninety degrees. Thus, if it is desired to move the standards I8 and 99, or their appendages, from one position to the other, the upper handle is lifted whereby the spring catch holding said castings 59 and '12 in one position is released by moving it out of seat I99. The standards are conjointly moved ninety degrees with theupper casting I2 when the spring catch 95, if released, will automatically engage pocket I93 provided therefor and lock the upper casting T2 in its second secure position. To get said casting I2 back to the original position, the same means of release are employed and the standards are swung manually with the casting I2 to the original position.

As a matter of convenience, the housing 8| for said handles and shafts 82 and 83 may be arranged for ready attachment and detachment from the casting 59 by being provided with lugs on opposite sidesthereof, one of said lugs 199 being short and being shown at the left in Figure 4. and the other I I9 being longer and extending along the top surface of said support to provide adequate support for the housing 8| against angular strains when moving the carriage therewith. Suitable screws or bolts may be employed for holding said housing 81 upon said casting 59.

Said two standards I8 and 89 are locked together at their tops by a yoke III, the ends of which have brackets I I2 and I I3 to support twopulleys H4 and H5. Suitable pulleys are selected so that the internal portion thereof falls in alignment with the axis of said standards, so that a weight, not shown, may be arranged to ride up and down it within each of said standards and be secured to cables H6 and I II passing around said pulleys H4 and H5, the position of said pulleys H4 and I I5 being such that no friction is produced by causing the weights or either of them to drag upon any particular portion of the surface of the internal periphery of said tubular standards "I8 and 89.

Surrounding said larger standard is a sleeve I l 8. Said sleeve comprises at its bottom two forwardly projecting brackets H9 which provide journals for roller bearings I29 adapted to en gage .at spaced intervals the front portion of said standard I8. Opposite said brackets H9, the material of said sleeve extends about the standard I8 but does not engages this post, thereby avoiding friction.

At the top end said sleeve 8, there a forwardly projecting lug I2I which provides an anchor for the cable H3 adapted to be attached thereto, surround the pulley I I4, and extend into the larger standard 18 where it is secured to a weight, not shown. The weight not shown provides a counterpoise for the head and the supporting members therefor.

At the back of said upper section of the sleeve IE8 are two brackets I22 oppositely disposed with respect to the brackets I I9 referred to hereinbefore, these brackets I22 supporting roller bearings I23 which are adapted to engage the rear section of the standard 18. The front bearings I29 are adapted to engage the standard 18 at the front and approximately forty five degrees from the middle front line at each side thereof, while the bearings I23 at the back are at forty five degrees from the middle line of the rear and at each side thereof, thus the sleeve I I8 is supported by roller bearings engaging said upright standard ninety degrees apart. The bearings I29 at the front are below the point of the suspension of weight on said sleeve and those at the back being above the point of such suspension so as to distribute the weight suspended therefrom without unduly centered strain upon the sleeve IE3 or the standard 18.

Projecting rearwardly from said sleeve H8 is a bifurcatedsection I24 which is adapted to engage each side of said smaller standard 80 to prevent rotary displacement of said sleeve I I8 on standard '58 and which is adapted with other parts to maintain the head in selected position relative to said main standard 18.

Projecting rearwardly from said bifurcated portion I24 are two arms H5 and I26, the ends of which are provided with roller bearings I21 and I28. Beneath the central portion of said sleeve IIB are additional brackets I29 and I30 which project forwardly to provide journals for additional roller bearings I3I and I32.

The side members 38 and 39 of said head supporting carriage are adapted to ride upon said several rollers, the top surface beneath the rear rollers I21 and I28, and the bottom surface on top of the bearings I3I and I32, whereby said rectangular frame members 26, 31, 38 and 39 are held horizontally, but are readily movable transversely of said sleeve. The spacing apart of the supporting rollers I21, I28, I3I and I32 is sufiicient to provide for a ready and free movement of said carriage without undue binding on the frame at either the front or back in relation to said rollers.

Above said sleeve II 8 on said main standard is a second sleeve E93 which has a plurality of brackets H4 and I95 for roller bearings I36 and i231 which roller bearings are adapted to en gage said main standard 18 at its front. At the back of said sleeve E33, is another bracket I38 in which is a bearing i 99. The several bearings 95, 31 and I39 permit of the free movement of said sleeve E33 along said standard 18.

Rearwardly extending from said sleeve I33 is a lug I lfi which projects to the rear of a device to form an anchor for pulley cable II1 which pulley cord H1 is adapted to be threaded over the pulley H5 and depend into the smaller standard 39, there to have hooked or attached thereto a weight forming a counterpoise for the part of the apparatus now to be described and which is supported wholly upon the upper sleeve.

Said lower and upper sleeves, II8 and I33, are adapted to be attached one to another by a hook I4I on the lower sleeve II 8 passing overa stud I42 on the" uppersleeve I33. Thus, when the two sleeves H8 and I33 are fastened together, they will move in unison. When the hook I 4| is unhooked or released from stud I42, each one of sleeves H8 and I 33 may be moved independently of the other. For purposes of convenience there is provided upon the smaller standard 80 a locking ring M3 by virtue of which the upper sleeve I33 may be locked in its uppermost position to prevent any tendency on its part to become misadjusted relatively to sleeve II8 when the two are detached.

At the front of said upper sleeve I33 are two projections I44 and I45 intermediate which, is a suitable bolt I46, the ends of which extend through said projections to be secured against displacement.

Between said projections is an arm I41 having apertured lugs I48 and I49 through which bolt I46 projects, thus providing pivotal mounting for said arm I41 which extends outwardly from the device. Pivotally mounted to arm I41 by a vertically disposed bolt I50 is a second arm I5I and by a similar bolt I52 there is attached to the second arm a section I 53 forming one half of an adjustable connecting member. The other half I54 of said adjustable member terminates in a highly adjustable support for a fluoroscopic screen, comprising a bifurcated support I55, between which at points I56 is a fluoroscopic: screen I51 having handles I58. Said support is a bifurcated bracket which extends to the side of said screen I51, the screen being freely adjustable and moving almost at the will of the attendant. The handles I58 are provided upon said screen I51 so that it may be readily moved about the pivots I in said bifurcated portion I55 and may be further adjusted by said handles by the force applied thereto, causing said pivoted arms I41 and I5I to angularly adjust themselves to any selected position desired by the operative or attendant.

For locking said main sleeve I I8 in vertical adjustment upon said standard 18, there is provided at the side thereof a locking lever member which, by rotation, is adapted to release spring pressure upon the sleeve member Il8, whereby a pair of blocks loosely secured one to another are adapted to be forced against or released from said standard IIB thereby securing said carriage in any adjusted position upon said standard 18, or releasing said sleeve from such position.

The sleeve I I3, at its side, has a locking device that is illustrated in detail in Figures 10 and 12. A shoe I59 engages the standard 18. A follower block I80 riding in a slot in sleeve H8 supports shoe I59 and has a shank IE1 surrounded by a spiral spring I53. Shank I61 can not revolve. The spring I63, shank I61, block I69 and shoe I59 comprise a plunger I62.

A housing 55 i attached to sleeve I I8 by screws 2I4 encloses the shank I 61. The outer face of housing I64 comprises an angularly cut camming surface. The inner part of the housing outwardly of the camming surface forms an apertured hub over which is an apertured cap I65, which has a camming surface 2M slidably engaging the camming surface on housing I64.

One end of the spring 463 presses against the inner part of the closed end of housing I64. Shank it"! passes through an aperture or opening in the housing and through the opening in cap I55 which registers with the opening in the housing I64. A ring washer 295 is disposed between the housing I64 and cap I65. A cap 2 1 screwa2I2, the cap I65 being relatively movable moving sleeve.

aromas v stops .2I3 may be providedbetween the a mir szsur aee f, de

pgZH ispressed againsthousing I65 by to the cap ZI I. The spring I63 serves to force the shoe I59, and. attachedmembers inwardly.

As lever I66 on .capflfib is moved, the camming surfaces cooperate to force. the cap I65 outward- 1y, compressing the spring I61, and moving the entire plunger I62 outwardly, freeing the'shoe I 59. from stand 18 to allow the sleeve H8 to be moved relatively thereto.

that the transverse. sliding ltwill be noted frame is provided with a cushioned member 206 disposed upon transverse member 26 whereby it is impossible to move said frame beyond a predetermined distanceiha rearward direction.

Also on the bifurcated member I24 is asimilar bumper I69 which. is adapted toretard too great forward movement by engagement with transverse member 31. I

For the purpose of taking stereoscopic views,

there is provided. upon the side of said horizontalfcarriage as previously described a pair of brackets ,which support a rod which is adapted to be rotated therein in the manner hereinafter described. By rotation it may be caused to actuate a locking mechanism. Along said rod is a sleeve. This sleeve is adapted to be secured in a selected position by a thumb nut which is threaded in the top surface thereof and which is adapted to be threaded into engagement with said rod. By adjustments, the carriage may be moved predetermined distances.

At the left hand side of the device through an ear AI at the front and an ear 4!] at the rear is a rod I10 having a handle "I at the front so that it may be moved through an angle.

Said rod I10 is slotted longitudinally at I12 to facilitate its being locked in a selected position.

Intermediate the length of the horizontal frame is a yoke I13 which surrounds the left hand frame rod 38 but through which yoke I13 said rod I10 slides. Said yoke I13 also surrounds said rod I10 disposed in the two eyes 40 and II and there is intermediate the yoke I13 and the vertical movable sleeve I I8 a flexible but secure connection I14 to maintain the yoke I13 in alignment with the sleeve II8.

On the under part of the yoke I13 is a shoe I15 which is'adapted to be moved against the rod 38 as an incident to the movement of the handle or lever I1I hereafter called the locking lever. Movement of the handle I1I brings shoe I15 against rod 38 as is shown in Figure 9. When so disposed, the horizontal carriage cannot move, but when the handle I1I is rotated to another position, the carriage is released for movement in and out.

By turning the rod handle I'II in a clockwise direction the cam or shoe I15 is forced against the larger rod 38 gripping the larger rod38 to prevent movement of the horizontal frame frontwardly and backwardly because, of said yoke I13 so secured to the saidvertically On the top of the yoke I13 is a stud I11. On the small rod H and adjustable therealong is a shoe I18 carrying therethrough a thumb screw I19 whereby it may bemade to take any selected position along said rod I10. Said shoe I18 has a lateral projection I80 one side of which terminates in a pointer or arrow I8I in order to indieate. a central position. Said extension I 80; is slott ed at I82 substantially its entire length and the stud I11 upon the yoke I13 projects therethrough, said stud I11 terminating in an enlarged head I83, as for example, a screw head, to prevent displacement of distance admitted by the remaining portion of the slot, and when theend of the slot is attained the second radiograph is taken. i

When it is desired to prevent; any movement whatever of the horizontal frame, then the other locking member is employed after the proper position for the head has. been determined.

The'tube head tank I5 has at its side a means for sustaining it in a selected angular position. TA semi-circular member 220 is attached to "the arm 24 A second; semi circular member MI is mounted-on; arm 241 opposed to member 2f2l and the two are combined tofo rm a slit ring fitting closely about circular boss 29. One end of member 22!] terminates in a split lug 222 between the legs of which a tongue 223 on member 22I extends. A lever 203 is pivoted between the legs of the split lug 222, and has at its inner end anv eccentric 224. As lever 293 is moved, the eccentric 224 contacts the tongue 223 to press the two members 22!! and HI together to grip the boss 2|, and as the movement is reversed, the lever 2B3 disengages the lug 223 to loosen the grip of members 225 and 22I to free the boss, permitting the tank I5 to be swung freely upon its pivotal supports. A screw as shown may firmly connect members 220 and HI at one side and another screw loosely connects such members at their other side.

I claim:

1. X-ray apparatus comprising a base, tracks for said base and along which it is movable, means for locking said base on said tracks, a turntable on said base, standards on said turntable, and X-ray apparatus of different kinds secured to one of said standards.

2. Means for determining the horizontal limits of movement of an X-ray tube for stereoscopy, comprising a horizontal frame, a head depending from and beyond said frame, standards within said frame, a collar commonly engaging said standards to prevent rotation, movable vertically thereof, and having arms to support said frame, a yoke connected to said. collar, a rod rotatably supported by said frame and movable longitudinally through said yoke, a stop member adjustable on said rod to determine the limit of movement of said rod through said'yoke, and means held against axial displacement by said yoke and rotatable with said rod for engaging said frame thereby rendering said frame immovable with respect to said yoke.

3. In X-ray apparatus, a track, a base movable along said track, a platform rotatable on said base about a vertical axis, standards mounted on said platform, an X-ray tube head support upon one of said standards and maintained by another of said standards in constant alinement with the axes of said several standards, and an X-ray tube head on said X-ray tube head support.

4. X-ray tube supporting apparatus comprising a track, a base movable along said track, a turntable on said base and rotatable thereon about a vertical axis, a plurality of standards on said turntable, an X-ray tube head support on one of said standards, an X-ray tube head on said support, and means cooperating with said turntable for locking said turntable in predetermined selected positions on said base.

5. X-ray tube supporting apparatus comprising a track, a base movable along said track, a turntable on said base and rotatable thereon about a vertical axis, a plurality of standards on said turntable, an X-ray tube head support on one of said standards, an X-ray tube head on said support, latch means for engaging a plurality of seats on said turntable for locking said turntable in predetermined selected positions, and a release means for freeing said latch from any of said several seats.

6. Means for mounting an X-ray head comprising a turntable and supporting means therefor, upright-standards on said turntable, one of said standards having an axis coinciding with the axis of said turntable, the other standard being separated from said first standard, a collar on one of said standards and guided by the other of said standards, arms each provided with a bearing and depending from said collar, a frame upon said bearings, and an X-ray tube head containing an X-ray tube depending from said frame.

'7. Means for mounting an X-ray tube head for vertical and horizontal movement comprising a base, a turntable on said base, spaced apart upright standards mounted on said turntable, a collar about one of said standards and guided by the second of said standards, legs from said collar about the second standard and having bearings therebeneath, shorter legs extending from said collar in the opposite direction and having bearings thereabove, a frame on said bearings, and an X-ray head containing an X- ray tube rotatably mounted at one end of said frame.

8. Means for mounting an X-ray tube head comprising a track, a plurality of standards, a platform therefor, a base movable along said track and on which said platform is rotatable, a tank for an X-ray tube and tube energizing instrumentalities and containing oil insulation therefor, a tube and tube energizing instrumentalities in said tank, and means on one of said standards for supporting said tank.

JULIUS B. WANTZ.

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