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Oct. 8, 1946. 7 J_ DUNLQP I 2,408,760 ELEVATOR‘ _ ‘Filed Dec. 22, 1945 ‘ 4 s Shéets-Sheet 1 ‘o - N ' I . INVENTOR WITNESSES: I JZWWKW rb- ' . , m I ‘ v // /-'/"7/ ' James ?an/0,0. ,1 " r I I Q Oct. 8,' 1946. ' _ J. D'UNLOP ‘ ELEVATOR v ' _ . Filed Dec. 22, 1194s WITNESSES: I ‘ - ’ 3 Sheets-Sheet 2 ‘ ' INVENTOR Jazz/as ?lm/0,0. 944%W WM 2,408,760 T J. DUNLOP ‘Oct. 8, 1946. > 7 2,408,760 ELEVATOR Filed Dec. 22,‘ 19,45 N \n 3 Sheefs-Sheet 3 H INVENTOR - James ?an/0p. ' ORNEY . 2,408,760 Patented Oct. ‘8, 1946 "UNITED STATESPATENT OFFICE ELEVATOR ' James Dunlop, Ridgewood, N. J., assignor, by’ mesne assignments, to Westinghouse Electric Corporation, East Pittsburgh, 2a., a corpora tion of Pennsylvania ' Application DecemberZZ, 1943, Serial No. 515,257; 9 Claims. (01. 1s7_95) 2 of deck-edge elevators on airplane-carrier ships Although the invention is illustrated and de-' scribed in connection with a deck edge elevator and the main measurements of ‘such an elevator with the ?ight decks thereon. now in use are. many, it may be used with dif My’ invention relates to elevators and, more particularly, to means for leveling theplatforms _ In a typical ship of this character, the ?ight deck overhangs the edge of the ship about 16', and out of this overhanging part of the deck is ferent sizes of platforms and with platforms of of, the flight deck, and the whole platform struc ture is suspended by a plurality of hoisting cables position to be supported by ‘and to be raised and other types of elevators. 1 . . Referring more specifically to the drawings, I have illustrated a deck edge elevator having a notched a space for an elevator platform which platform I0 disposed between a pair of guide rails is about 60' long and 34’ wide and which weighs‘ approximately 60 tons. The platform extends 10 I] and I2 mounted on the outside of a ship hull l3 (only a small portion of which is shown) in approximately 18' beyond the overhanging edge between a pair ofguide rails mounted on the out lowered between a main deck (not shown) and a I ?ight deck. I5 by a plurality of hoisting cables Itv side of the ship hull. A plurality of guide ‘shoes. l5 , and I‘! attached to its fore and aft ends by hitches I8 and IS. The hoisting cables may be operated are mounted on the platform structure and dis posed in slots in the guide rails for guiding the platform between the guide rails. In an elevator of this character and this size, by any suitable means, such as a hydraulic engine likethat illustrated and described in my co-pend ing application Serial No. 515,992, ?led December it is important that the platform should stay level 20 28, 1943, and’ assigned to the Westinghouse Elec tric Elevator Company. . and ?ush with the ?ight deck when it is parked thereat, so that the arrestor hooks on the air , The platform [0 may be constructed of seam less steel tubing, structural steel sections and steel plate welded together in bridge-like form to form ?ight deck without being caught. Therefore, one 25 a relatively light but strong structure 20. The guide rails II and [2 are provided with object of my invention is to provide for leveling channeled faces 2! and 22 facing each other and an elevator platform with its landing and main are mounted on backing plates 23 and 24. The taining it in level condition therewith regardless backing plates are secured to the ship hull by a of the position of any load on the platform. Another object is to provide a leveling means 30 plurality. of horizontal brackets 25 which are welded thereto to provide a strong support for the for a ship elevator platform having a two point planes landing on the ?ight deck will pass safely over the platform and the adjacent edges of the I lift which will cause it to stay level with the upper deck of the ship regardless of any conditionsto which it may be subjected. ‘ For a better understanding of the invention, reference is made to the accompanying drawings, guide rails. 1 The platform is guided in the guide rails by four roller-type guide shoes 21, 28, 29 and 30. The guide shoes 21 and 29 are mounted one above the other on the aft end of the platform for en gaging the channel 21 in the guide rail II. The guide shoes 28 and 30 are mounted one above the other on the fore end of the platform in position edge elevator looking outboard from the inside 40 to engage the channel 22 in the guide rail l2. of the ship with the guide rails in cross section, Referring to Figs. 5 and 6, the guide shoe 2‘! Fig. 2 is a top plan view of the elevator plat comprises a cast metal body 32 anda side roller form illustrated in Fig. 1, with parts of the ?ight 33 and an end roller 34 mounted therein. The deck and the elevator platform broken away to guide shoe body 32 is securely fastened to the reduce the size of the drawing, Fig. 3 is a view taken on the line III—III of 45 platform framework 20 by a plurality of bolts 35. The side roller 33 is mounted on a shaft 36 which Fig. 2, . is rotatably mounted in the upper cylindrical por Fig. 4 is a view taken on the line IV-IV of tion 31 of the body 32, so that it will bear against Fig. 2, either a renewable steel strip 38 or a renewable Fig. 5 is an enlarged top-plan view of one of steel strip 39 mounted on the side-walls of the the guide shoes in its guide rail, " channel in the guide rail II to prevent lateral Fig. 6 is a view taken on the line VI—-VI of movement of the platform. I 1, illustrating the end roller in one of the guide The guide roller 34 is disposed to engage the shoes, and inner face of the channel 2| to prevent end move Fig. »7 is a view taken on the lines VII-v11 of 55 ment of the platform and is rotatably mounted Fig. 6. ' in which, I Figure 1 is a view in side elevation of a deck 2,408,760 3 4 on a pin 4! disposed in the forked end of a The guide shoes 28, 29 and 3B and the slip round shaft 42, slidably disposed in the lower cylindrical portion d3 of the body 32. The end per blocks associated therewith are constructed in the same manner and are mounted on the elevator platform in the same manner as the guide roller 34 is biased into engagement with the in ner face of the channel 2| by a coiled compres shoe 21 and the slipper block 51 except that the sion spring 45 disposed between the central face guide shoes 29 and 3!! are mounted in what may of a cavity 55 in the rear-end of the roller shaft be'called'an upside down "relation to the guide and the inner face of a cap 45, which is mounted shoes 21 ‘and 28. i " ' " " ' on the cylinder 43 by a plurality of bolts 4?. The A plurality of locks 65, 55, 5'l and 68 (Figs. spring is selected with a steep characteristic to 10 2, 3 and 4) are provided for locking the platform balance the weight of the platform. The shaft 42 is prevented from rotating in the body 32 by a pair of ?ns 49 on the inner side of the» cap 45 which extend into slots 48 in the rear end of the shaft, so that the end roller 34 will always track in a vertical direction in the channel 2!. The holes in the cap 45 for the bolts 41 are made loose so that the cap may be rotated slightlyto aline the roller with its guide rail before the bolts 1 against the ?ight deck when it is to remain out of normal operation for any length of time. The lock 65 comprises a cast body ill which is se curely fastened to the underside of the ?ight deck l5, a lock bolt ‘H slidably disposed in the casting and a stop member 12 mounted on the ‘adjacent end of the platform. The side of the casting '55 adjacent the platform has a down~ wardly and inwardly sloping face or beveled sur are tightened. 20 face 13 disposed to be engaged by an outwardly A pair of bolts 51 and 52 pass loosely through and downwardly sloping or beveled face ‘14 on the the cap 46 and screw into the rear-end of the shaft 42. These bolts are used only during as sembly to hold the spring compressed until the the ?ight deck. platform is properly alined in the ‘guide rails. After the platform is correctly positioned the bolts ?ight deck. stop member '12 when the platform is raised to The beveled faces 13 and ‘i4 cooperate to stop and center the platform at the ' The lock bolt ‘H is provided'withan outwardly 5| and 52 are removed and watertight plugs are inserted in the holes. Thus the spring is free to bias the roller against the guide rail at all times. and downwardly sloping or beveled face '15 for engaging an upwardly and outwardly sloping face '56 on the angular stop member 72 when in look A rearwardly extending central projection 54 is 30 ing position. The rear-end of the lock bolt is disposed on the rear-end of the shaft 42 to pro connected to an operating rod 78 by a link '19 vide a means for limiting the rearward movement of the shaft when the spring 45 is compressed by movement of the platform toward the guide rail. A hardened steel striking bar 58 is mounted on the rear-end of the projection 54 by a press fit and a pin 55 in position for engaging a “stop” or bending bar 58. The “stop” bar is dispOsed across a pair of shoulders 59 at the ends of va rectangular depression 50 in the inner side of the cap 45 and is held in position by brass screws 5811 which pass through its ends into the cap 45. The end of the striking bar is rectangular in shape and a lever arm 80', so that rotative movement of the rod 18 will move the lock bolt into orout of its locking position. The lock 66 is construct ed in the same manner as the lock 65. The lock 67 comprises a casting 82 fastened to the underside of the ?ight deck, a lock bolt t5 slidably disposed in the casting 82 and a stop member 84 mounted on the adjacent endv of the 40 platform. The rear-end of the lock bolt 83 is connected by a link 85 and a lever arm 86 to the locking rod 18, so that it will be moved into and out of locking position with the lock bolt ‘H. facing the central portion of this bending bar. When the force exerted by the platform on the guide shoe exceeds a predetermined amount, the striking bar will engage the bending bar and bend it into the space 55, thus relieving the strain on the end roller when it exceeds the normal. amount for which it is designed. The platform guide rails and guide shoes are usually so designed that, under normal conditions, a space 6! measuring one-eighth inch exists between the striking bar 56 and the bending bar 58 to- permit that much spring biased play of the roller 34 during normal operation. The bending bar 58 is so selected as to size and strength that it will bend and per mit the end roller 34 to compress the spring 45 more than one-eighth inch only when a prede termined dangerous pressure tends to move the platform endways. The end of the striking bar 56 is rectangular in shape and ?ts loosely-into a rectangular depression in the cap 45. A slip per block 51 (Fig. 5) is mounted on each end of the platform in position to engage the backing The engaging surfaces of the bolt 83, the stop 45 84 and the casting 82 are horizontally disposed so that they will prevent vertical movement of the platform when the lock bolt is in locking position but may permit a limited horizontal movement of the platform. The lock 68 is con 50 structed in the same manner as the lock 61. The locks are described and claimed in the co pending application Serial No. 514,520, ?led De cember 16, 1943. It is important that the platform shall lie level 55 with the ?ight deck when it is moved thereto and, in order'to insure this position of the plat form, I have provided a cam N30 for engaging ‘the roller 34 at the aft end of the elevator and a cam [ill for engaging the roller 34a at the fore 60 end of the elevator as the platform rides up'to its position level to the flight deck. The cam I00 is removably mounted on the inner face of the channel 2| at a point where its upper thickest . portion will be engaged'by the end wheel Hand 65 the cam i0! is mounted on the interface of the plate 24 and prevent further endwise movement 7 of the platform in case it forces the bending bar to its bending limit. The end of the striking bar 56 is rectangular in shape and ‘?ts loosely into a rectangular depression in cap 46. The 70 bending bar and the slipper block construction are illustrated, described and claimed in the co pending application Serial No. 516,046, ?led De cember 29, 1943, and assigned to the Westinghouse Electric Elevator Company. ‘ channel 22 where its upperthickest end will be engaged by the end wheel 34a when the platform is flush with the ?ight deck. The distance the cams extend outwardly from-the inner'face of the channels may be adjusted by the use of suitable’ shims between the cams and the channels. - The cams cooperate with the guide‘ shoe rollers‘ 34 and 34a, the beveled faces 13 and ‘M at ‘the aft end-of the platform, the beveled faces 13a and 75 14a on the lock as at the fore end of the platform. aéoavco andv'with thehoisting .cables'to levelthe platform‘: I 1 I claim as my invention;; ?ush/with the ?ight deck. The hoisting cables are setito'have a'stretch in them equal 'to' the ‘ v H v. _ _ 1. In an elevatorfor serving an’ upper ?oor;.a, pair of guide rails, a platform disposedfbetween weight ‘of the platform, plus‘ the total live-load at both ends of the platform, when the platform, is stopped at the ?ight deck. 6 made without departing‘ from its spirit-and Scope; the guide rails, a stop device on ‘the ?oor for each end of the platform, each stop device having a downwardly and inwardly sloping face, astop~ I The stretch is'obtained by placing stops on the devicemounted on each end of the platform, each ?ight deck‘to stop the platform and by placing of, said stop devices, having an outwardly and stops ‘on the hoisting engine plunger at such po:-' 10 downwardly slopingface. for engaging the corre sition that the engine will continue the hoisting ‘ spending. stop device on the floor, a cable'at each pull on the cables after the platform is‘stopped at _ end of the platform for operating the platform andipulling it vup against the ?oor to a ‘point where the sloping faced stop devices on the plat my copending application Serial No. ‘507,l32,>?1ed 15 form engage the sloping faced stop devices on the ?oor, and means disposed on the guide :rails for As stated before, the end fwheels'34 and 34a centeringv the platform with the stop devices at maycompress their springs a distance equa1to .the ?oor as the platform arrives thereat. ' ' oneieighthv of' an inch.‘ The cams extend out '2.‘ In an elevator for serving an upper-?oor,‘ wardly' from the channel faces approximately a pair of guide rails, a platform‘ disposed between one-eighth of an inch. Therefore, when the plat 20 the'guide rails, a cable at each end of the plat-V form is brought ?ush with the ?ight deck, the form for operating, the platform, a vguide roller end’ wheels'34 and 34a roll upon the cams and. movably mounted on each end of the platform in are moved inwardly to take up their one-eighth position to. engage the guide rail thereat for guid inch clearance and in this position‘ they center ing, the platform between the guide rails, means the platform ?rmly between the beveled edges 25. for biasing each guide roller toward its associated the ‘?ight deck' until all of the stretch in the. cables is taken up, as is described and claimed in October21,“1943. ‘ ‘ a , 13 and 13a on the ?ight deck. r ' ' » guide rail, means for-limiting the rearward move ment of each guide roller to a predetermined dis tance, a stop device mounted on the parking floor irln assumed operation of the elevator for veach end ofthe platform, each of saidrstop > It will be assumed that the platform has been 30. devices having an inwardly and downwardly lowered below the ?ight deck and is now being returned to the ?ight deck by the hoisting cables l6 and I1.’ As the platform moves upwardly from its lower position and nears its ?ight deck posi sloping face, a stop device mounted on each end vlower ends of the cams I00 and I'll and are rives at the ?oor, and a cam disposed in each of the platform,‘ each of said stop devices having an outwardly and downwardly sloping face dis posed to engage the sloping ‘faces on the stop de 35 tion, the end rollers 34 and 34a roll upon the vices mounted on the ?oor when the platform ar thereby moved inwardly against the biasing ef fect of their compression springs. As the plat form continues its upward movement, the'in creasing thickness of the cams continues forc guiderail for engaging the guide roller associated therewith as the platform arrives at the parking 40 floor to force the guide rollers .to their rearward ing the end rollers inwardly. The compression of the springs forces the platform into its central limit and thereby center the'platform with its stop devices between the sloping faces of the stop devices on the ?oor. ' ~ position with reference to the’beveled faces on 3. In an elevator‘for serving an upper ?oor, the locks 65 and 66 and, as the platform reaches a pair of guide rails, a platform disposed between its ?nal position, the cams force the rollers 34 45 the guide rails, a cable at each end of the plat and 34a inwardly until, the clearance back of them form for operating the platform, an upper guide is completely taken up and the platform is then roller and a lower guide roller movably mounted in a true central position with reference to the , on each end of the platform in position to en beveled faces on thelocks 65 and 66. gage the'guide rail thereat for guiding the plat If the load on the platform is unevenly bal 50. form between the guide rails, means for bias anced by being placed at the fore end of the plat 7 ing‘ each guide roller toward its associated guide ' form, the platform may be lower at its fore end, rail, means for limiting the rearward movement than it is at its [aft end.’ In such a case, the of each guide roller to a predetermined distance, platform will pivot on its end roller 34 as the a stop device mounted on the parking ?oor for beveled face 14 engages thebeveled face 13 and each end of the platform, each of said stop de the fore end of the platform will swing upwardly vices having an inwardly and downwardly slop into place under the pressure of the cables, until ing face, a stop device mounted on each end of the beveled faces 13a and 14a at the fore end of the platform, each of said stop devices having the platform, so that the platform will now lie an outwardly and downwardly sloping face dis 60 ?ush with the ?ight deck and. will remain in that posed to engage the sloping faces on the stop position, because the hoisting cables are at the devices mounted on the ?oor when the platform limit of the stretch for which they are designed, arrives at the ?oor, and a cam disposed in each the platform is in true center position between guide rail for engaging the upper guide roller the cams and the beveled faces on the platform associated therewith as the platform arrives at 65 are in contact with the beveled faces on the the parking ?oor to force the guide rollers to ?ight deck. ' their rearward limit and thereby center the plat- ' By ‘the foregoing description it will be seen that form with its stop devices between the sloping I have provided a means for leveling along ele faces of the stop devices on the ?oor, whereby the vator platform at a ?ight deck which will bring up pull of the cables when the platform arrives it ?ush with the ?ight deck under all conditions 70 at the ?oor will cause it to cause the platform to of loading, and which maintain it ?ush with that lie ?ush with the ?oor. deck under any condition of load. , 4. In an elevator for serving a parking ?oor, Although I have illustrated and described only a pair of guide rails, a platform disposed between one speci?c embodiment of my invention, many the guide rails, a cable at each end of the plat changes therein and modi?cations thereof may be 75 7 2,408,780 form, for supporting, raising and lowering the form, a roller mounted in ,each guide shoe to engage the associated guide rail forguiding the platform along it, means for biasing each roller platform, an upper and‘ a lowerguide roller mov ably mounted on each end of the platform in position to engage the guide rail thereatvfor guid toward its guide rail, a block mounted ineach ing the platform between the guide rails, means guide shoe for limiting the rearward movement for biasing each guide roller toward its guide of its roller to a predetermined distance, a bev rail, means for limiting the rearward movement eled stop device at each end of the platform for of each guide roller to a predetermined dis stopping it at the deck, and a cam disposed on tance, a beveled stop device mounted on the parking ?oor for each end of the platform for 10 each guide rail, each of said cams having its thin end disposed downwardly along its guide rail stopping it at the parking ?oor, and a cam dis and its, thick end disposed at the point where posed in each guide rail for engaging the upper the roller on the upper guide shoe roller rests guide roller associated therewith as the platform‘ when the'platform is at the deck, said thick end arrives at the parking floor to force said upper of each cam being approximately equal in thick guide rollers to their rearward limit and thereby ness with the predetermined limited rearward center the platform with the beveled stops. movement of the rollers.’ 5. In an elevator for serving a parking ?oor, 8. In a deck edge elevator for serving a flight a pair of guide rails, a platform disposed between deck on. a ship,,a pair of guide rails, a platform the guide rails, a cable at each end of the plat form for supporting, raising and lowering the 20 disposed between the guide rails, a cable at eachv end of the platform for supporting, raising and platform, a guide movably mounted on each end lowering the platform, said cables having a of the platform in position to engage the guide stretch in them equal to the weight of the plat rail thereat for guiding the platform between form plus the total live load at both ends of the the guide rails, means for biasing each guide to ward its guide rail, means for limiting the rear 25 platform, an upper and a lower guide shoe mounted on each end of the platform in posi ward movement of each guide to a predetermined tion to engage the guide rail thereat for guiding distance, a beveled stop device mounted on the the platform between the guide rails, each guide parking floor for each end of the platform for shoe having a roller mounted on the outer end stopping it at the parking floor, and a cam dis of a shaft slidably disposed in the guide shoe, posed in each guide rail for engaging the guides as the platform arrives at the parking floor to 30 a spring disposed in each guide shoe for biasing its roller toward the guide rail adjacent thereto, force said guides to their rearward limit and a block mounted in each guide shoe for limiting thereby center the platform with the beveled rearward movement of the roller and its shaft to a predetermined distance, a beveled stop de 6. In an elevator for serving a parking floor, 35 vice at each end of the platform for stopping it a pair of guide rails, a platform disposed between at the ?ight deck, and a cam disposed in each the guide rails, a cable at each end of the plat guide rail, each of said cams having its thin end form for supporting, raising and lowering the disposed downwardly along its guide rail and its platform, said cables having a stretch in them thick end disposed at the point where the roller equal to the weight of the platform plus the total on the upper guide shoe rests when the platform live load at both ends of the platform, an upper is at the ?ight deck, said thick end of each cam and a lower guide movably mounted on each end being approximately equal in thickness with the of the platform in position to engage the guide‘ predetermined limited rearward movement of rail thereat for guiding the platform between the the rollers. , stops. guide rails, means for biasing each guide toward 45 its guide rail, means for limiting the rearward movement of each guide to a predetermined dis tance, a beveled stop device mounted on the park ing floor for each end of the platform for stop ping it at the parking floor, and a cam dis posed in each guide rail for engaging the upper guides as the platform arrives at the parking floor to force said upper guides to their rear ward limit and thereby center the platform with the beveled stops. 7. In a deck edge elevator for serving a deck on a ship, a pair of guide rails, a platform dis posed between the guide rails, a pair of cables for operating the platform, an upper and a lower guide shoe mounted on each end of the plat 9. In an elevator for serving a plurality of floors, a pair of guide rails, a platform disposed between the guide rails, a plurality of cables for ~ operating the platform, a guide movably mounted on each end of the platform in position to en gage the guide rail thereat for guiding the plat form between the guide rails, springs disposed between the guides and the platform for central izing the platform between the guide rails, means for limiting the rearward movement of each guide to a predetermined distance, and cams disposed on the guide rails for engaging the guides and forcing them to their rearward limit as the plat form arrives at a selected floor to positively cen tralize the platform at that ?oor. JAMES DUNLOP.