Патент USA US2382525код для вставки
Aug.- 14, 1945. F. G. WELLINGTON 2,382,525 LEVELING SYSTEM Filed Nov. 1, 19471 ~ ,2 Sheets-Sheet l 17~ ~ // 18 n 20. :0 Z8 ‘INYENTOR. , ATTORNEY. Patented Aug. 14, 1945 _ 2,382,525 UNITED 7 STATE-S1 PATENT, 2,382,525 LEVELING SYSTEM‘ Fred ‘G. Wellington, vSeattle, Wash., assign-onto ' Paul Wickstrom, Seattle, ‘Wash. - Application November 1, 1941, Serial No. 417,529 ‘ "6 Claims. (01. sis-e209) ' paratively simple device permitting extreme‘ accu that the passing of a locomotive and'c‘ars, oreven a heavily-loaded truck,‘ at distances bf‘ several, hun dred yards has been knownto ‘produce ‘a ground racy of leveling as between a severalty- of points fall below the iig-roomteveloping .1140, andv more. located at horizontally spaced intervals. sag, consequence causing a very‘ major discrep ancy between the” gauge ‘points of thef'jig-frame. This invention relates to a leveling system, and for its general object aims to provide a com‘ While the invention is in no waylimited as to Aftersuch a‘disturbancej as‘ long“-as't,en‘hours application, its peculiar adaptability to the air plane industry in truing the vertical ‘columns of may be required forythe'jg‘roun‘d structure‘ below the floor of the" jig-room to return-‘to normalcy, jig frames mightalmost type the invention as a speci?c therefor, and it is believed tube of bene?t in point of clarity to herein prefacethe descrip tion by brie?y considering the difficulty which has been encountered inleveling a jig frame prelim~ inary to the start of ,a structural.._operation and the practical impossibility, as leveling has been wherefore it is essential to accuracy‘in the end product of'the jig- that leveling compensationsbe made at very frequent intervals during’theperiod of ground readjustment.- 1' - Having the foregoing in mind, it is a-lfur'ther and a more particularobject of my inv‘ention'to devise a system employing. the principles of the liquidrtubelevellusing a riser, tube ‘for eachof the several columns of the dig-frame, in association heretofore carried on, of thereaftermaintaining Within permitted tolerances the , trued condition into which the Jig-frame has been put. with indicator devices for ‘the Irespectiverisers It may be here stated that the usual jig-frame is composed of horizontalfloor girders, most gen 20 highly sensitiveto variations frQmaHpredeter mined true level, the. entire system ‘being one erally box-channel members, assembled together substantially free from liability of becoming dis.-_ in a series of connected rectangular patterns and each supporting, at spaced intervals of the length, a severalty of upright columns, the whole being ordered or defective and one which maybe quickly and accurately read. welded as a unit andfunctioning to produce altere 25 nate walk-ways and work-sections. Directly be low each column is a jack-screw'enga'ging a nut welded to the box-channel and ?nding a footing points of the columns. ' ‘ » . v hereinafter described and claimed. I y . , r . In thedrawingsr l is a iragmentaryariewtalsen .> ,. V ; I. 1 .. M -1Tn:.~hQri on a bearing plate bolted to the concrete floor of the ‘jig-room, the jack-screws ‘permitting a truing of the jig-frame through the act ‘of raising or lowering the box-channel girders at ‘the respective _ ,Theinventioniconsists in- thenQvel construction and in the adaptationand combinationof part5 30 ’ zontal section through amt-ties of aiisetrame showing the new preferred embcdiment off- the present Fig. 2 is invention an elevational applieq view thereto. thereof, ' 7 M v Fig. ,3 is a fragmentary itransv', rs" verticalsec Transit levels have‘been more or‘less standard heretofore as a means of arriving at a considered 35 true level, and while'such an instrument in the Fig. 2. hands of an expert is‘ highly‘ accurate, it has been the exception rather than the rule to accomplish a jig-frame leveling operation without exceeding Fig. 4 is a fragmentary transverse vertical sec. tionto a scale sun furtherenlargedand detailing the‘ spirit-glass and‘ associated structure which I tion' taken to an enlarged scale oriilinentry-[,3v of . . f . _ ' the engineer's blue-print speci?cations‘of accept 40 employ as my'preferred indicator. ‘ ‘4 “Fig. 5 is a horizontal section ‘on line 5+5‘ of able tolerance. However, aside from-the fact‘ of the inaccurate results which often follow from the use of transits where junior engineers have been assigned to perform ‘the workof leveling the jig-frames, the extended period of time required for transit leveling is a majorobjection to their use and has been a prime deterrent against carry ing on periodic levelings during the structural operation of building a wing or body part, as the Fiaétand Fig. 6 is'a further‘enlarged , end‘ elevationalview " detailing the fulcrum mounting ‘for ‘the ‘spirit glass and representing the Iatterin vertical sec tion. ' " " " " " ' 'I'he numeral H1,v ini‘the-drawings denotes the horizontal box-channel members and H. the‘ verti callcolumns of a jig-framesupported-by?ack case may be, with'the frequency necessary to as 50 screws IZ inelevated relation above=5the ?oor [3 of a jig-room, the Jacki-screws lying immediately sure the desired, if not a‘ctually‘the ‘required, ac below the several columns and being'ofithe usual curacy in the ultimate plane. As indicative of the distortional stresses'to which a" jig-frame is - construction providing abearing head, IZ-"Work me against a foot~platee l4 'and'having a-lock-nut subjected during a structural operation within the same, it maybe pointedoutby way of example 55 15 for securing the" same inadjusted‘position. 2. 2,382,525 According to the present invention I attach to the box-channels I0 a series of connected pipes constituting a supply main l6, and to this supply main connect branch pipes I‘! to have the latter out more than ordinary care, whereas .0075 vari ation has been heretofore considered an excep tional showing. While I have illustrated and particularly de rise to substantially similar heights perpendicu larly along the sides of each of the jig columns scribed the embodiment of the invention now preferred by me, it is my intention that no ll. Any means of support may be employed, straps Ill-I8’ being indicated for this purpose. limitations be implied therefrom, and that the following claims be read with only such restric Connected by the usual ?ttings to one of the risers to have the same lie in- elevated relation tions as are necessarily brought into the same to distinguish over prior knowledge in the art. above the same is a funnel reservoir 20 comple What I claim is: mented by a control cock 2|, and provided in the l. A liquid-tube leveling system comprising the supply main in proximate relation to this funnel combination of a manifold having a plurality of supporting riser is a drain valve 22. substantially ?xed risers extending upwardly as Indicated by 23 are vented hydrostatic level 15 branches to substantially similar heights from ing heads ?tted with glass covers 25 and applied the manifold; hydrostatic heads for the respec in surmounting relation to the several risers, and ' tive risers; ?oat-operated indicator devices for housed in each of these heads is an indicator in the respective risers housed in said heads and strument comprised of a bubble spirit-glass 25' characterized by movement relatively in corre having ?xedly hung from one of its endsa her spondence with changing levels of the liquid metically sealed ?oat 21 and being ?tted at its within the related risers; means for supplying opposite end with a bipedal stand of which the liquid to the system for bringing the liquid with two limbs 28 diverge downwardly from opposite in a selected riser, employed as a prime reader, sides of the longitudinal median line of the glass to a desired level arrived at by recourse to the and ?nd a pivotal footing in surface cups 30' of 25 related indicator device; and means having op a fulcrum mounting 30. It will be understood erative connection with the indicator devices of that the'fulcrum mounting functionally locates the other said risers permitting the latter to be the ?oat, and that thisfulcrum point in the individually adjusted relative to a related hydro respective head might be formed as an integral static head in attaining a reading of the latter shelf in the event of collimating the system to 30 said indicator devices corresponding to that of have each of the several branch pipes ll rise to the prime reader, said means permitting correla exactly the same height from the base plane of tion as between the several indicator devices the frame. Such a collimating procedure would, without disturbing either the hydrostatic heads however, be somewhat of a di?icult undertaking or the liquid levels therein. and may be obviated through the instrumental ity of providing for ‘each leveling head a means of adjusting the fulcrum point vertically. As » ' a 2. A liquid-tube leveling system comprising the combination of a manifold having a plurality of risers extending upwardly as branches to sub a means suitable for this purpose I have illus trated the mounting 30 as having a depending stem 3i arranged to slidably ?t in a cylindrical socket 32 formed in a wing extension of the head. _ The stem is held against revoluble shifting by a key 33, and is adjusted vertically by a screw 34 which is ?xed in adjusted position by a lock-nut stantially similar heights from the manifold; and indicator devices for respective risers comprising spaced relation below the level plane occupied by the water-glass, its purpose being only that of drostatic heads surmounting the respective risers, said heads being vented from the undersides and a bubble spirit-glass having a float carried from one end thereof and at the other end being ?tted with a bipedal stand of which the two limbs di verge downwardly from opposite sides of the lon gitudinal median line of the glass and ?nd a ful 35. Not indicated in the drawings but employed 45 crum footing functionally disposing the float rel as a convenience to permit the spirit-glass to ative to the liquid within the riser. be set on the fulcrum‘ mounting of a respective 3. A liquid-tube leveling system comprising the hydrostatic head in the absence of liquid within combination of a manifold having a plurality of the risers is an abutment rod carried transverse risers extending upwardly as-branches to sub ly'from one to the other side wall of the head in stantially similar heights from ‘the manifold; hy forming a rest for the outer end of the glass. presenting substantially imperforate lids sealing The mode of using the invention is believed to be clear from the foregoing, but may be brie?y summarized by stating that the jig-frame with the chambers of the heads against gravitationally deposited dust; and indicator devices for the re spective risers housed in the hydrostatic heads the leveling system applied thereto, following and characterized by movement relatively in cor erection, is ?rst trued through suitable instru ments, following which the leveling system is ?lled respondence with changing levels of the liquid through the funnel with water or other desired 60 liquid with the admission being governed by re course to the spirit-glass of the most convenient riser, ordinarily the riser from which the funnel is supported. Each of the remaining risers, which is to say the spirit-glass thereof, is thereupon ad 65 justed by means of the respective screws 34 to bring the indicator bubbles directly between the within the related risers. , , 4. A liquid-tube leveling system comprising the combination of a manifold having a plurality of risers arranged to extend upwardly as branches to substantially similar heights from the mani fold, provided with pivoted means ?oat-operated from the liquid within the risers and entirely housed by the latter for indicating changing lev els of the liquid within the respective risers, and reading lines of the glasses.‘ It is, obviously, a matter of but little time and e?ort to there 70 means for adjusting the pivots for said indicat ing means vertically in relation to the ‘related after ascertain discrepancies in the jig-frame as between the several guide-points, and to correct the same with the jack-screws to level the dis turbed bubble or bubbles. Adjustments to with— in .0015 of absolute level areaccomplished with risers. - . 5. Structure according to claim 4 including capping members surmounting the risers, pro 75 viding a chamber completely housing the related 2,382,525 indicator devices, and presenting inspection win dows for viewing the housed indicators, said cap ping members providing a vent leading upwardly into a respective said chamber. 6. As a liquid-level indicator, and in combina tion with a liquid container; a tube having an indicator bubble hermetically sealed therein and carrying a ?oat; means supported by the con ' ' 3 tainer forming a fulcrum-mount for the tube to functionally dispose the ?oat relative to the liquid of the container, and means for adjust ing the fulcrum-mount vertically in relation to the container for leveling the bubble of the tube to varying selected levels of the liquid within the container. FRED G. WELLINGTON.