US1430550A - X-ray apparatus - Google Patents

Description

G. H UTALING AND W. CUBEE,

MAY APPASMUS. l

APPLICATION FILED JUNE 3U IQIQ. vggggjggggjqgo Patented Oat. 3, 1921,

Inventors: George Hotaljg, Wlem D Coolldga TheiVMw/ 3M- Attorneg Patented ct. 3, i922.

" UNITE-n stares GEonGE HOTALING ANI) WILLIAM n. contines,y or scnENEcTAnY, NEW YORK, 4.srsIGfNons To GENERAL ELECTRIC COMPANY, n CORPORATION or NEW YORK.

X-RAY APPARATUS.

T all 'whom it may concern ,Be it `known that we, GEORGE Ho'rALINc and VILLIAM D. CooLIncE, citizens ot the United' States, residin at Schenectady,

county of Schenectady, State of New York, `have invented certain new and useful lmprovements in X-Ray Apparatus, of which y the following isa speciication.

The .present invention relates to X-ray vapparatus and in particular to the structure Y which is adapted to carry the electrical conductors between the source ot current sup- .plyfand an X-ray tube.

It is the object of 'our invention to prol vide: a compact, reliable device which may.

, be detachably mounted upon an X-ray apparatus, and which will reduce to a. mini- -jmum the Adanger of serious injury by electric shock'to those concerned with the oper- 20 ation of an X-ray device. Our invention is concerned with structural features, the novel details of which willv be pointed out with greater particularity in the appended claims.

A more complete understanding of our invention maybe had from the .following specification taken in connection with the'accompanying drawing in which Fig. 1 is a perspective' view of the complete X-ray outfit of ,which the reel constituting'our invention forms a part g Fig. 2 is a sideview of the reel with part of the side wall broken away; Fig.

3 vis a sectional view of one of the reels carrying a. resistor; Fig. 4 is a detailed view showing the 'electrical connection of a con- 35 duotor coupled to the reel, and Fig. 5 is a diagram ot electrical connections. `As shown in Fig. 1,-conductor reels 1, 2,

comprising our invention, may be used in connection with a pedestal stand 3 on which is mounted an `X-ray tube 4 supported by clamps 5 carried by an extension arm 6. To the ree-ls 1, 2, are attached cable conductors 7, 8, respectively serving for. connection to the terminals 9, 10 of a transformer 11. The

cable 7 comprises two conductors 12, 13, connected to different taps of a transformer secondary 14 (Fig. 5), and `conveying a heating current to the cathode of the X-ray tube through the reel, as will be hereinatter described. One of the reels is provided with an adjustable impedance 15, either ohmic or inductive, the part-s of which are shown in j detail in Fig. 3, whereby the cathode heating current may be regulated. The reel 2 is'pro- 55. vided witha single conductor'cable.

es shown in Fig. 8,'the cable reel comprises a frame or spool 16 made of suitable 'insulating material such, for example, as hard rubber, or bakelite. Connected to the spool 16 is a flat spiral spring 17, the inner end of which is .attached in any convenientway to a stationary barrel 18, tor example, by means ot' a screw 19. The opposite end of the spring 17 is connected by a. brass ring 46 to the spool 16. The barrel 18 is connected to spacing plates 20, 21, and to a supporting plate 22 by means of a screw bolt 28. The spacingplate 2O may consist of suitable insulating material such as hard rubber, or baltelite. The plate or washer 21 consists of metal. i Between the spacing plate 20 and the reel side wall is a contact plate 24 (Fig. 2). Connected to the supporting plate 22 is a sleeve 25 containing a sliding contact or brush 26 which is connected to the conductor 12 and is pressed into electrical contact with the plate 24, by ai spring 27, the electrical circuit being completed by a conductor as indicated. The conductor 18 is connected to a terminal 28 mounted on a plate 29 located on ,the opposite side of the reel. The plate 29 is in turn connected by a screw 47 to a coiled resistance wire 15 mounted on a base 30 of suitable insulating material, as for example, asbestos compound. A screenl covers the resistor 15 and prevents unintentional movement ot' the adjustable rheostat arm 32. This arm is rotatably mounted on a pin 33 and electrically connected by said pin to a conductive plate 34. The rheostat arm is ordinarily adjusted only once tor any given X-ray tube and circuit voltage, and, therefore, preferably is not made easily accessible.

The plate 34 is electrically connected to a 95 conductive plate 35 by screws 36. The plate 35 is connected through the plate 21, the barrel' 18, and the spring 17 to one of the conductors 89 of the cable 38 mounted on the reel, as shown in Fig. 4. The other cable 100 conductor" is connected tox the plate 24, which, as has been explained above, is in contact with the -brush 26. The two, conductors 37 and 39 are united to form a single cable by a surrounding insulating sheath 38 hav- 10.5 ing a diameter approximating the distance between the, side ,walls 16 ot the reel. The end or the'cable 38 is provided with a suitable contact-making coupling 42. When not extended the cable 38 is wound upon the reel 110 by the rotative efort of the spring 17 and when fully Wound the end of the cable is re-l to avoid the attendant noise and the odor of gaseous products of electrical discharges.

The electrical circuits from the transformer secondary to the electrodes 44, 45, of the X-ray tube 4 will be understood without further explanation by a comparison of F ig. 5 with Figs. l and 3. vIt will be observed' that tlie electric circuits of the reel conductors are maintained complete andinde endent whether the conductors are part y or wholly unvvound and no slack conductors are present as a source of danger.

lVhat we claim as new and desire to secure by Letters Patent of the UnitedStates, is,-'

A1. A reel for X-ray apparatus comprising a support, a rotatable holder mounted thereon, and a. cable adapted to be wound on said holder, an electric circuit for conveyingelec'- tric current to said cable, and means mounted on said reel for regulating the current in said circuit.

2. A reel for Xfray apparatus comprising a rotatable frame, two flexible insulated conductors wound on said frame, an impedance mounted on said frame, an electrical con nection between said impedance and one of said conductors, means for maintainingr said conductors taut, and conductive means l'or completing circuits through said conductors independent of the rotation of said reel.

making electrical contact with said plate, 40V`V4 two flexible insulated wires adapted to be Wound on said frame, one of vsaid wires being electrically connected to-said plate, and means for completing an electrical circuit through the second wire electrically insulated from the wire connected to said plate. 4.*A reel for X-ray apparatus comprising a rotatable-non-conducting frame, a spring connected to resist rotation of said fra-me, a conductive plate mounted on said frame, a

brush making electrical Contact with said plate, an adjustable impedance mounted on said frame, a conductor -connected to said` plate, a second conductor connected to one end of said spring, andn a. series electrical 5,5'

connection between said resistor and one et said conductors. o

, 5. An X-ray apparatus comprising'a ped` estal, extensible means for supporting anl X-ray tube in a desired position upon said pedestal, outwardly 'extending arms carried by said pedestal, reels adapted to be demountably supported upon saidarms. conductors carried by said reels for connection tothe terminalsof said tube,'a'sliding eon- 65J tact for one of said conductors, and current regulating means mounted on one of said reels.

In witness whereof, we have hereuntovset our hands this 27th day ofll'igie. 1919. GEORGE HOIRALING.

VILLIAM D. GOOLIDGE.

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