US2204465A - Device for adjusting the roentgen ray cone by means of an auxiliary lamp - Google Patents

Description

A. BAIER 2,204,465

DEVICE FOR ADJUSTING THE ROENTGEN RAY com: BY MEANS or AN AUXILIARY LAMP Filed Feb. 5. 1959 -I 1/.--------- 1 J? 2 l m 4' a ll 5 I a z. 8 I .IHHH. ma ,4 .m A? "M 1 a fl I :2 9 f T 1 :94 finl Nu NH 5 IL L 1 I. 1 u m" a a T u 4 T41 7914 r w -u m 8 H a 0 m MM June 11, 1940.

Patented June 1 1, 1940 t DEVICE FOR ADJUSTING THE ROENTGEN RAY CONE BY MEANS OF AN LAMP Anton' Baier, Munioh QLGermany Application February 3, 1939, Serial. N0.'254,386 I In Germany :February 3, 1938' W This invention relatesto a device for the adjustment of the Roentgen ray cone, for example on to a predetermined portion of the body, by

means of an auxiliary-lamp located outside-the 5 X-ray cone and Whose'light raysare directed by reflection or refraction so that they form a light cone which coincides with the Roentgen ray cone and appears to emanate from the starting point thereof. 1 I

The object of the invention is, to produce such an adjusting device which is not confined in its use to a Roentgen tube of a-certain construction and of certain dimensions, but can be connected to any existing Roentgen apparatus already in use and adjusted to the actual Roentgen tube thereof without displacement' or constructional alterations, so that in any case alight ray cone coinciding with the Roentgen ray cone actually being produced can be produced with one'and' the same adjusting device. r

As such an adjusting device capable of being subsequently v fitted to already existing apparatuses must evidently be located further distant from the tube focus than is usual, the in :3 vention also has for its object to construct the device so that, in spite of the necessary elements for adapting to the Roentgenraycone, it is as small as possible and free from screening vele- 'ments projecting laterally and downwardly The directing of thelight rays which emanate from an auxiliary lamp located on a tube adapted to be fitted to the casing of .theRoentgen tube, is effected by two separately adjustable mirrors located one behind the other within the tube, above two pairs-of slightly curved shutters hingedly mounted within the tube and adapted to swing upwards into open position within this tube,, which shutters have in their contacting edges in the middle notch-like incisions and by 9 which asharp centering eifect can be attained. The mirrors are adjustable as regards their angle of inclination, the one independent from the other; one mirroris located'in' known manner in the Roentgen ray cone and the other laterally thereof with itsv reflecting surfacedirected towards the auxiliary lamp. .The mirror in the Roentgen ray cone is preferably also adjustable in height. The other mirror is "adjustable relatively to the longitudinal axis of; the Roentgen 9. ray cone so that it can be moved towards or away from the. auxiliarylamp and'from the other mirror- An .embodimentof the invention is illustrated by waycf examplein the accompanying drawe ing;in=which: a r I romai e. or. 250-414) Fig. 1 shows the device in tion, 5

" f Fig. 2 .is a bottom plan view on a smaller scale showing thetube after the removal ofthe perforated template and its frame, \i

Figure. 3 shows an adjustable arrangement of the auxiliary lamp, and v Figure4 shows on a larger scale an adjusting element for the mirrors.

-l is a tube open at both ends and adapted to axial vertical sec-.

' befitted on thecasing of the Roentgen tube in any known manner. An auxiliary lamp 2 with its casing 3 is laterally mounted on the tube Two adjustable mirrors 4 and 5 are accommodated in the .tube labove pairs of shutters I1, 11 and I8, I8 and serve for producing alight ray cone coinciding'witn the Roentgen ray' coner, 11,12. In Fig. 1 the centre line at, '0 of this coinciding light ray cone is indicated and the deflection of the beam of rays emanating from the aux- I iliary lamp. 2 isindicated by the central lines ul and a2. Thus, the rays emanating from the lamp 2 are defiected by the mirror 4 on to the mirror '5 which is located intheRoentgen ray cone in known manner inclined. to thehori zontal. The mirror 4 islocated laterally of the Roentgen ray cone withits reflecting surface directed towards the auxiliary lamp 2.

For the purpose of adjustment the two mirrors 4 and 5 are connected at their four corners to travellingnuts .8 and.9 which move on guide.

spindles l0 and H. The mirrors are connected with the travelling'nuts 8 and 9 by straps l2 and 13 each provided, with an arm [2. or l3 respectively, said arms, gripping their travelling nut 8 or 9 and securing them against rotation.

Holes 6? are provided in the straps l2, I3 for the passageof'the guide spindles I0 and I l, as shown in Fig. 4, and these holes are slightly largerthan the diameter of the guide spindles, so that, the mirrors 4 and 5 can be adjusted Without jamming. Each of the two mirrors 4 and 5 has four guide spindles and four travelling nuts, two of each of which are shown for each mirror in the vertical sectionillustrated in Fig. 1. .Each of the four guide spindles of the two mirrors can be actuated independently of the others.

With the aid of the guide spindles Hi the mirror can be broughtinto the desired inclined position to and necessary distance from the mirror 5 and the source of, light 2. The mirror .5 can be both v raised and lowered and its angle of obliquity admoved from the flange 3| and another kind of lamp can be fitted in its stead.

According to Fig. 3 this lamp casing 3 is adjustable on the tube l to increase the adjusting capacity of the adjusting device. For effecting a horizontal adjusting the lamp casing 3 is mounted on a horizontal carriage M which is adjustable by means of a .guide spindle M. Owing .to this adjustability the casing 3 can be approached towards or moved away from the mirror 4 in the direction of the arrow l5.

If the casing 3 is to be adjustable also in vertical direction, the horizontalcarriage 14 can also be raised and lowered by a guide spindle 16.

Each shutter of the two pairs of screen shutters ii, i! and l8, !8 arranged at right angles to and the one above the other is of slightly curved crosssection and oscillatably suspended in the tube i by arms 59 and 20 provided at the two ends, the shutters 68 passing under the shutters l7 and clearing the arms 29 and 20. The shutters of each pair are actuated by means of handles 23 and 25 arranged outside the tube and mounted on pivot bolts 2! and 22 respectively to each of which bolts the corresponding flap l1 and I8 is rigidly connected. The pair of shutters I1, I! swing at right angles to the pair of shutters I8, it. All four shutters move within the tube during the opening and closing of the screen.

Each one of the four shutters I! and I8 has in the middle of the contacting edges a notch like incision 25 or 26 respectively. These incisions, when the screen is closed, form a small square light passage aperture by which a centering to the object to be brought under the tube can be effected in a simple manner. This centering may be carried out in daylight.

Each of the shutters l1 and [8 has a brake disc H (I8 and on each disc a spring brake ll (88') acts. The brakes cause each shutter to remain reliably and automatically in its adjusted position.

The extreme closed position of the shutters ll, I1 and l3, l8, as illustrated by the closed position of the shutters I! in Fig. 1, is limited by stops 28 so that the shutters cannot be moved beyond the central axis of the tube and the centering device 25, 25, 26, 26 therefore comes into the middle' on the closing of the screen.

The tube 1 may also be provided with connection screws 2? for connecting perforated templates 29 and their carrier frames 30.

I claim:

1. A device for adjusting the Roentgen ray cone by means of an auxiliary lamp whose light rays are so directed by reflection that they seem to emanate from the focus of the Roentgen tube, comprising in combination a tubular housing adapted to be fitted on the Roentgen apparatus, an auxiliary lamp, a casing for this auxiliary lamp adapted to be fitted laterally on said housing, a mirror in said housing facing said lamp, means carried by the housing and connected to said mirror for adjusting the obliquity thereof relative to the longitudinal axis of the housing and operative for adjusting the mirror relative to the vertical axis of the housing, a second mirror located in the Roentgen ray cone within said housing and adapted to catch the rays reflected by said first mirror and reflect downwardly the light ray cone to be produced coinciding with the Roentgen ray cone, means for adjusting the angle of inclination and vertical position of said second mirror, a pair of screen shutters of curved cross=sectlon arranged one-above and at right angles to the other within said tube and hingedly mounted in the tube below said mirrors, and a beam center indicating device formed by four incisions in the middle of the contacting edges of said flaps.

2. A device for adjusting the Roentgen ray cone by means of an auxiliary lamp whose light rays are directed by reflection so that they seem to emanate from the focus of the Roentgen tube, comprising a tubular housing adapted to be mounted on the Roentgen apparatus, an auxiliary lamp, a casing for said lamp mounted on said housing, means for raising and lowering said lamp, a mirror mounted in said housing, means for adjusting said mirror as to inclination and relatively to said auxiliary lamp, a second mirror arranged in the Roentgen ray cone within said tube and adapted to catch the rays reflected by said first mirror and to reflect downwards a light ray cone similar to the Roentgen ray cone, means for adjusting said second mirror as regards inclination and vertical direction, a pair of screen shutters articulated with said housing below said second mirror and movable within said housing, and a beam center indicating device formed by notches in the contacting edges of said screen shutters.

3. A device for adjusting the Roentgen ray cone by means of an auxiliary lamp whose light rays are directed by reflection so that they seem to emanate from the focus of the Roentgen tube, comprising a tubular housing adapted to be fitted on the Roentgen apparatus, an auxiliary lamp, a casing carrying the auxiliary lamp means for adjusting said casing on said housing relatively to the vertical axis thereof, a mirror facing said lamp within said housing, means for adjusting said mirror as to inclination and also relatively to said auxiliary lamp, a second mirror located in said tube in the Roentgen ray cone adapted to catch the light rays reflected by said first mirror and reflect downwards a light ray cone similar to the Roentgen ray cone, means for adjusting the inclination and height of said second mirror, and a pair of movable screen shutters oscillatably mounted in said housing below said second mirror and having a light, passage aperture forming a beam center indicating device.

4.,A device for adjusting the Roentgen ray cone. by means of an auxiliary lamp whose light rays are directed by reflection so that they seem to emanate from the focus of the Roentgen tube, comprising a tubular housing adapted to be fitted on a Roentgen apparatus, an auxiliary lamp, a casing carrying the auxiliary lamp, means for adjusting said lamp vertically and relatively to the vertical axis-of said housing, a mirror in said housing facing said lamp, means for adjusting the inclination and vertical position of said mirror' relatively to said lamp, a second mirror located in said housing in the path of the Roentgen ray cone and'adap'ted to catch the rays reflected by said auxiliary lamp and reflect downwards a light ray cone similar to the Roentgen ray cone, means for adjusting said second mirror in height. the means for adjusting said mirrors each comprising four adjusting devices distributed around the mirror to be adjusted and each device comprising an externally operable guide spindle, a nut shiftable on said spindle and a'strap fixed on the mirror and embracing said nut to lock it against rotation, andtwo pairs of screen shutters movably. mounted within saidhousing below said second mirror, and braking devices ..onev provided for each of the four screen shutters of said two pairs of screen shutters.

5. Apparatus for adjusting the cone of Roentgen rays by means of an auxiliary lamp situated outside said cone, the light my cone of said lamp being directed by reflection so that it seems to start from the focus of the Roentgen tube, comprising a casing, two mirrors located in the casing, an auxiliary lamp arranged outside the cone of Roentgen rays, said mirrors being placed, the one over the other and forming an optical system relative to the ray cone of the auxiliary lamp, said mirrors being independently adjustable relative to the other in inclined positions with respect to the horizontal and vertical planes and also parallel to their central axes, adjusting means for the mirrors including four running spindles and running nuts adapted to move on said spindles, arms connecting the corners of the mirrors with the running nuts, a'center indicating device for the beam from said mirrors consisting of four screen shutters having notches on the end edges arranged in star shape within thecasing and four external handles for oscillating said screen shutters, said screen shutters being arranged in pairswith the pairs opposite each other and intersecting.

6. Apparatus for'adju'sting the Roentgen ray cone by means of an auxiliary lamp located outside said cone, the light ray cone of said lamp being directed by reflection so that it seems to start from the focus of the Roentgen tube, comprising a horizontal'casing, two mirrors located in the casing, said casing adapted to be moved relative to said cone by means of a horizontal carriage actuated by spindles, said mirrors forming relative to the ray cone of the auxiliary lamp an optical system bringing the Roentgen ray cone into the same direction as the ray cone of the auxiliary lamp, four runner spindles and running nuts adapted to move on said spindles and acting upon the corners of the mirrors by means of connecting arms arranged on the mirror corners, said mirrors cooperating with abeam center indicating device consisting of four screen shutters arranged within the casing and having notches on the end edges thereof forming a star shape and adaptedto be oscillated by'four external handles, said screen shutters being arranged in pairs with the pairs opposite each other and intersecting.

7. Apparatus for adjusting the Roentgan ray cone by means of an auxiliarylamp located outside said cone, the light ray cone of said lamp being directed by reflection so that it seems to start from the focus of the Roentgen tube, comprising a horizontal casing, two mirrors located in the casing, said casing adapted to be moved relative to said cone by means of a horizontal carriage actuated by spindles, said mirrors forming relative to the ray cone of the auxiliary lamp -an optical system bringing the Roentgen ray 7 cone into the same direction-as the auxiliary lamp, four runner spindles and running nuts adapted to move on said spindles and acting upon. the corners of the mirrors by means of connecting arms arranged on the mirror corners, said mirrors cooperating with a beam center indicating screen shutters being arranged in pairs with onepair opposite the other and intersecting.

ANTON BAIER.

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