US1982954A

US1982954A - Fluoroscopic screen holder

Info

Publication number: US1982954A
Application number: US478811A
Authority: US
Inventors: Julius J Grobe
Original assignee: General Electric X Ray Corp
Current assignee: General Electric X Ray Corp
Priority date: 1930-08-30
Filing date: 1930-08-30
Publication date: 1934-12-04
Anticipated expiration: 1951-12-04

Description

Dec. 4, 1934. .1. J. GROBE 1,982,954

FLUOROSCOPIC SCREEN HOLDER I Filed Aug. 30, 1930 5 Sheets-Sheet 2 INVENTOR De'c. 4, 1934.

J. J. GRoBE 1,982,954

FLUOROSCOPIC SCREEN HOLDER Filed Aug. 30, 1950 5 Sheets-Sheet 3 INI/ENTOR ATTO A/Ey Patented Dec. 4, 1934 UNIT-ED STATES PATENT OFFICE 1,982,954 FLUoRoscoPIc SCREEN HOLDER Julius J. Grobe, OakPark, Ill., assignor to General Electric X-Ray Corporation, Chicago, Ill., a corporation of New York Application August 30, 1930, Serial No. 478,811

Y 11 Claims.r (Cl. Z50-34) I'he present invention relates to a iluoroscopic screen holder and particularly has to do with means for counterbalancing such a screen and with the construction of the screen support.

In X-ray apparatus, a uoroscopic screen is an invaluableV accessory. To have flexible manipulation of such a screen is highly desirable. It is one of the primary objects of the present invention to provide easy manipulation of a fluoroscopic screen. To obtain such flexible operation, a unique system of counterweighting has been devised and the structure of the holding partsV nection with the present invention. Such design oflscreen support has as its object the provision of an unique Vmeans for supporting Ia iiuoroscopic screen and for attaching it to an X-ray table or 2g;r the like.

These objects, and such others as `may hereinafter appear, are obtained by the uniquearrangement, improved combination, and novel construction of the various parts assembled into a single embodiment of the present invention illustrated in the accompanying drawings ycomprising three sheets, hereby made a part of this specification, and in which:

Figure 1 is a schematic perspective view ofthe system of screen support and counterweighting employed; f

Figure 2 is a side elevation of a physical embodiment of the device as applied to an X-ray table, the full lines disclosing the device in operable positionacross a table, and the dotted lines, the position of the screen when thrown back out of use;

Figure 3 is a front elevation of the device shown in Figure 2, the table and supporting structure being removed and the screen upright;

Figure 4 is a detail, partly in plan and partly in section showing the means whereby the screen is locked within its bifurcated supporting frame; and

5o i Figure 5 is a plan view of the device illustrated in side and end elevations in Figures Zand 3.

Like reference characters are used to designate similar parts in the drawingsand in the description of the invention which follows. A

The device comprises primarily a screen and Y Each is more completely illustrated in the suc``v prising` side members 28 and transverse members frame, designated A, a pivoted support B therefor, a counterweight C, and cables D. These members are shown in Figure 1 in simple form.

ceeding gures, now to be fully described. l

In Figure 2, the numerals l0, 11, 12, 13, 14, 15, 16, and 17, represent, respectively, the sides (10) of an X-ray table, the supports (11) therefor, the bottom rails (12) therein, the top rails (13) thereof, supports (14) for said rails, a dished top (15) 65 Vfor the table, a carriage (16) for an X-ray tube,

and a' tube (17) carried thereby, the carriage 16- riding intermediate the paired rails 12 and 13. The construction illustrated is conventional in that such illustration istaken from a table now a* -being built by an X-ray table manufacturing company of national reputation, the table itself being the subject matter of an application for Letters Patent now pending'in the United States Patent Oilce. p

From the side of the carriage 16, parallel rod supports 19 project for the attachment `of the present apparatus. Such projection is .usually at the far side of the table, or at what may be called suitable 80` its rear. Secured to the rods 19 in any manner, and preferably freely detachablevtherefrom, is a frame 204 comprising a pair of side members 21,

cross members

22 and 23, and a central supporting member 24.

Members 21 are identical but opposed. In each ,85m

are bearings v25 and 26 journalled for freerotation therein. The frame members 21 are each'enlarged to cover saidbearingsand are also enlarged to provide bosses 27 about the rods19.

The shapeof the frame 20 or of its Yseveral parts, 90 im is one of choice', and theparticular Varrangement disclosed is'selected for symmetry of outline as well as utility. The member 22 terminates in an' upwardly pointed section while the section 24 is primarily a U-shaped trough to provide a casing 95 for the cables (D) later to be further mentioned.

Within the frame 20 which is bowed, as is shown in Figure 2, is a rectangular frame com- 29 and 30. The members 28 are tubes or rods 100`l riding on the

bearings

25 and 26 between whichH they may be raised and lowered,l (conjointly of` course), to raise and lower al screen" (Aland f screen support (B) later to be more completely described. l

Member 29 maintains the members 28 in spaced. relation at the bottom of the frame and has as its center bearings for two pulleys 31 and 32. Members'30 project forwardly to the edge ofthe table 5 to provide end bearings for a member'40. Jour- 110 t' nailed in member 30 are two

pulleys

36 and 37.

Projecting upwardly from member 29 there may be cable housing 18, which housing extends over

pulleys

36 and 37. In the member 22, there is 'disposed a pulley 38, and another pulley 39 is secured in member 24 adjacent member 23. Member 40 includes a rearwardly projecting arm 41, and an upwardly or forwardly extending arm 42. Each of said arms has an end of a cable secured thereto. That extending from member 41 is designated 43, and passes over plulley'3'7, downwardly beneath pulley 39, and is anchored in counterweight 52.

From member 42, a cable extends over pulley 36, around pulleys 31 and 32, through the counterweight 52, over pulley 38 and is then'anchored in the opposite side of said counterweight 52. The counterweight 52 comprises a rectangular member..

having bearings 45 at each corner, said bearings riding on the inside of parallel tubes 28. There is an aperture 46 through the counterweight 52 to allow the cable 44to ride therethrough and suitable cable anchors therein for both cables 43 and 44. lUpon themembers 30is a two ended boss 47 'fJwhich has bumper cushions, 48 and 49, at each end, which bumpers are adapted to be impinged by cushions 50 and 51 secured respectively to

arms

41 and 42 of frame member 40.

Frame member 40 also has a bifurcated section 3f-53 at the ends of which are pivot supports 54 for a rectangular screen rframe 55. Within the frame 55 is a iluoroscopic screen 56, and at its ends are handles 57. It also vhas a boss 58 at its inner end Min which ythere is disposed a locking member com- Uprising a,plunger 59 having a locking end 60. Said plunger 59 is mounted for reciprocal motion in a suitable aperture in boss 58 and which closely engages one section of the shank of said plunger from whichprojects a knob 61 whereby t* the plunger may be moved manually.

About another section of the plunger 59, not closelyengaged by the material of boss 58, is a coiled spring 62 which urges the head 60 outy wardly, the rend ofthe enlarged open section of thef'b'oss58 surrounding said' spring forming a seat 63 f or the said spring. In this manner, the framef55 may be locked in position in alignment with Ithe bifurcated section 53, or it may be rex leased therefrom for pivotal movement from supportingpartsB/l.

The iiuoroscopicscreen as a whole, including its frame and therectangular supports 28, 29 and 30, maybe moved as a unit.` When lifted, the countmerweght 52 moves downwardly. The cables'43 """and 44' are sfOiarranged, by reason of movable pulleys 36-37 andf3l'32` and xed

pulleys

38 and 39, that they exert'a down pulling influence upon counterweight 52." When the screen is forced `J downwardly, the weight 52 goes up because ofthe same arrangement.v

When screen 56 'and support 53 are tilted, as is shownin Figure 1 from horizontal to vertical, the latter position being assumed for many reasons,

65 ,forexampla to allow the positioning or removal of a'patientfrom the X-ray table, or because the screen is not'required, then cable 43 passing over draws the weight 52 downwardly. At the same time, cable 44 on the opposite arm of the frame 7540, and threaded over

pulleys

36, 31, 32 and`38 and then anchored `in AWeight 52, releases the counterweighta distance equal vto the pull thereon.A Whenthe screen is pulled to the'` horizontal, then the vmovementof the weight 52 is reversed,

` the pull being through cable 44.

Thus one counterweight 52 is made to balance the vertical movement of the screen and its appendages to render the screen freely adjustable, and is also made to facilitate the movement of the screen from one extreme movement to its other extreme position. When vertical, the counterweight maintains the screen in upright position. Likewise, it facilitates the maintenance of the screen in horizontal position-when so disposed, permitting ready manipulation up and down and upon the axes 54. The arrangement described lends unusual .flexibility to the screen.

I claim;

1. Incombination, a stationary frame, a screen, aholding member for said screen and having upwardiyk anddownwardly projecting arms, a second frame movable vertically on said stationary frame, said screen holding member being pivotally connected to said movable frame to admit of said screen being tiltable on an axis external to the body of saidiscreen froma substantially horizontal positiontofa 'substantially vertical position, a. single counterweight, cables between f said arms and. said counterweight, and pulleys for guidingsaid cables, said counterweight being moved with ytiltable adjustments of said screen holding memberiandbeing adapted to maintain said movable'frame in a selected vertical position.

2. In combination, a screen holding memben4 a luoroscopic screen in said member, a rriovabley frame Aon which said screen holding member` is i pivotally connected, a stationary frame forsaid movable frame and along which it is movable, a., Cltweght ffof Said Screen holding mmbry; said screenV andwsaid movable frame, ,opposed con- .1m necting means intermediate said counterweighti; and Said Screen. hQldmg membelf, and 56011116@ ,t0 the latterf'atiopposite sides of the pivotal connection therefor, and means `for guiding said connecting" means.u

3l ,In Combination@ Stationary kfratrie.haring Side members, a movable frame reci,llrroable,on.fsaid side membera'a screenholding member pnlotallyrconnected to said -movable frame, a screenin said screen holding member, a counterweight; for, SMQmQVabIe frame, screenholding. member and screen,l anchoring means on sai d,sc re aen.v

holdingmember at oppositesides ofthe pivotal connection of saidscreen holding, member, flexible, connecting means between said arlchoringglg,` meansand opposite sidesk of said counterweight,yl and means for` guiding saidliexiblegconnecting means.

4- In. Combination, a 4Stationary,frame havin sidemeinbers, a movable` frame `reciprocable in lgo, said stationary frame, a screen holding members pivotally connectedv to said movable rameand having arms above and below such; pivotal. con.- nection, a fluoroscopic screen in said screen hold-` ing member, a counterweight, opposed=;cables from the top and.y bottomr of said counterweight to the top and bottom arms on said screen ho1d-,. ine ..IlfxerlllqerlY and Stationary vpulleys and pulleys movable with said movableframe for guiding. said cables. i

5. In combination, a stationaryframe, a movable, `tranne .reciprocable on saidstationary `frame, a screenholding memberpivotally connectedto said movable frame, a luoroscopic screen n; Said, Screenfhldee member@ counterweightfor Sad mollble frame." Screen-holding .membliand Screen and ieeipreeble. Vin.Seid5119x11-l 1a.frana iiexible'z, connecting. means. .between .i said screen y holding member .and .Seid counterweight .9114s.

mens .Oefseidlsriationarr and Onsaidemevahls 15a.

frame for guiding said flexible connecting means.

6. In combination, a stationary frame, a movable frame reciprocable in said stationary frame, a screen holding member pivotally connected to said movable frame and having arms above and below such pivotal connection, a screen in said screen holding member, a counterweight for said movable frame, screen holding member, and said screen and reciprocable in said movable frame, cable guiding pulleys upon and movable with said movable frame, other cable guiding pulleys on said stationary frame and cables from the top and bottom of said counterweight to the top and bottom arms on said holding member and guided by said several pulleys.

7. In combination, a stationary frame, a movable frame reciprocable in said stationary frame, a member for holding a fluoroscopic screen pivotally connected to said movable frame, a fluoroscopic screen in said screen holding member, a counterweight for said movable frame, screen holding member, and screen and reciprocable in said movable frame, and connecting means comprising flexible cables between said counterweight and said screen holding member, and iixed and movable pulleys to guide `said cables to cause said counterweight to reciprocate in said movable frame when said movable frame is reciprocated in said stationary frame and said screen holding member is moved about its pivotal connection.

8. In combination, a vertically movable frame, a stationary frame for said movable frame and in which it reciprocates, a counterweight reciprocable in said vertically movable frame, a screen holding part pivotally connected to said vertically movable frame, a iluoroscopic screen in said screen holding part, cables upon said screen holding part at opposite .sides of said screen and connected to said counterweight at opposite sides thereof, and means for guiding said cables comprising iixed and movable pulleys.

9. In combination, a stationary frame, a movable frame in said stationary frame and vertically reciprocable therein, a screen holding member pivotally connected to said movable frame and having an axis of movement transverse of said movable frame, a screen in said screen holding member, a counterweight reciprocable in said movable frame, and a system of connections from said screen holding member to said counterweight comprising cables at opposite sides of said screen holding member and said counterweight and guide pulleys for said cables whereby said counterweight is reciprocated in said movable frame coincidentally with either angular movements of said screen holding member or reciprocable movements of said movable frame.

10. In combination, a stationary frame having side members, a movable frame reciprocable on said side members, a screen holding member pivotally connected to said movable frame transversely thereof, said screen holding member having armsabove and below its pivotal connection to said movable frame, a fluoroscopic screen in said screen holding member, a counterweight in said movable frame and reciprocable therein,

cables between said arms and opposite sides of` ,guiding said cables to reciprocate said counterweight in said movable frame upon angular movement of said screen holding member and upon reciprocation of said movable frame.

11. A stationary substantially rectangular frame member, bearings at the corners of `said frame member, a carriage comprising rails, a counterweight, the rails of said carriage riding in the bearings in said frame and providing a track for said counterweight, a screen holding member pivotally connected to said carriage and having cable receiving arms at opposite sides thereof, a fluorescent screen in said screen holding member,lpulleys on said carriage, other pulleys on said stationary frame, and` cables from said arms to opposite sides of said counterweight and guided by said pulleys.

JULIUS J. GROBE.