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Publication numberUS1736472 A
Publication typeGrant
Publication dateNov 19, 1929
Filing dateFeb 26, 1927
Priority dateFeb 26, 1927
Publication numberUS 1736472 A, US 1736472A, US-A-1736472, US1736472 A, US1736472A
InventorsWego Peter C
Original AssigneeWego Peter C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tray elevator
US 1736472 A
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Description  (OCR text may contain errors)

Filed Feb. 26, 1927 3 SheetsSheet Nov. 19,1929. P.C.WEGOI 9 1,736,472

TRAY ELEVATOR Filed Feb. 26, 1927 5 Sheets-Sheet 2 .lllimlutllujuju u i lu In I In I gwuento'c PeZer 6. WZgyo Nov. 19, 1929. c, WEGO 1,736,472

TRAY ELEVATOR Filed Feb. 26. 1927 3 Sheets-Sheet 3 gwoc'ntov Peier. W s-90 QWLx W Patented Nov. 19, 1929 UNITED STATES PETER C. WEGO, OF ST. PAUL, MINNESOTA TRAY ELEVATOR Application'filed February 26*, 1927.

This invention relates to an elevator, particularly, although not exclusively, adapted for raising and lowering dish trays from one floor or level to another in restaurants and arranged to coact with means for automatically removing trays from downwardly moving tray supports.

As far as I am aware, the elevators heretofore provided for such work have been unnecessarily complicated and expensive and have had the further disadvantage of requiring an excessive amount of space for installation. Thus, as the space available for an elevator is often very limited, the elevators heretofore provided have been unsuited for general use.

It is my object to provide a novel and inexpensive elevator, which is arranged to occupy a minimum of space. A further object is to provide in an elevator of thiskind a novel arrangement of-tray carriers and coacting guides whereby smoothand continuous travel of the tray supports is insured and friction is reduced to a minimum.

This invention also includes certain other novel features of construction, which will be more fully pointed out in the following specification and claims.

In the drawings, Figure 1 is a side eleva-- tion of my improved elevator; Fig. 2 is a horizontal section through the same, taken on the line 2-2 of Fig. 1 and showing a suitable arrangement of driving mechanism for operating the elevator; Fig. 3 is a front elevation of one of the tray supports and carrier therefor; Fig. 4 is a side view of a tray support and carrier; Fig. 5 is a plan view of the same; Fig. 6 is a horizontal section through an elevator having an alternate form of tray support, adapted for use with simplified tray removing mechanism and Fig. 7 is a front view of an elevator having an alternate arrangement of guides and supporting sprockets for the chain.

As illustrated, my improved'elevator has a single, endless chain .8 to which a series of spaced tray supports 9 are secured at suitable intervals. A guard plate 10 is provided on each tray sup ort to extend between the tray and chain. E hch tray support is rigidly se- Serial No. 171,254.

cured to a trave ling carrier consisting of a vertical plate or frame member 11, two rearwardly extending frame members 12, each secured to the chain 8 and a series of anti friction wheels 13, adapted to run upon the guides hereinafter described. Each man. wardly extending or transverse frame mem-- ber 12 is preferably constructed in the form of hollow rectangle, the front side of which is connected to the longitudinal member 11 and the rear side to the chain 8. Each lateral side of each member 12 carries a pair ofthe wheels 13, so that each carrier has eight wheels adapted to engage suitable guides. The members 12 ofeach carrier are pivot ably secured to the member 11, one of said members 12 being attached to the plate 11 by a bolt 14, which is free to slide in a slot 15 in said plate. It will be evident that this slot 15 permits movement of one of themembers 12 toward and away from the other.

Extending parallel to the chain 8 is a pair of guides for the tray supports having inwardly extending flanges 16 upon which the wheels 13 operate. Each guide has a rearwardly extending flange 18 which is secured by horizontal arms 17 to vertical frame mem-. bers 19 of the elevator. One of these frame members 19 is arranged backof each vertical I run of the chain and transverse members 20 connect the members 19. v In the preferred construction, shown in Figures 1 and 2, the chain 8 is supported at the upper and lower ends of the elevatorrespectively upon large sprocket wheels 21 and 22. The upper sprocket wheel 2l is sup ported upon a shaft 23 having suitable bearings in the elevator frame and the lower sprocket wheel 22 is fixed upon a shaft 24:, adapted to be driven through'a train of gears 25 by an electric motor 26 (see Fig.2). It will be noted that the guideflanges 16 extend in a vertical plane and have arcuate'fportions which are concentric with the chain 8 where it passes over the periphery of the sprocket wheels 21 and 22. These guide flanges are continuous orendless so that the wheels 13' are retained in contact therewith during the. entire travel of the tray carrier. It willalso be noted that the flanges 16 extend in the 10 structure. These members 42 in then downsame plane throughout their length, including the arcuate portions at the upper and lower ends of the elevator.

Each of the tray supports 9 in the preferred construction shown in Figs. 1 and 2 is substan tially U-shaped in plan view, having a pair of parallel arms 9* which support the tray and project toward the front ofthe elevator. To properly center the trays upon these arms 9, I provide side walls 27, between which the tray carriers pass in their downward movement. These walls 27 are supported upon the transverse frame members 20. 'loautomatically remove the trays from the carriers 9 at the lower end of the elevator, a bed of rollers 28 is arranged to project from a support 29 between the arms 9" and the tray can rier. Another roller 30 is also provided to convey the trays from the rollers 28 to a suitable belt 31 passing over a drum 32. The bed of rollers 28 and 30 may be arranged to slope away from the elevator to remove the trays by gravity, but in the construction shown in Figs. 1 and 2, I have illustrated suitable mechanism for positively rotating the rollers and thus'insure quick removal of the travs deposited on the rollers 28. This driving mechanism consists of a series of bevel gears 33 severally mounted on axial shafts of the rollers 28 and coacting beveled gears 34 fixed on a transverse shaft 35. A gear 36 on the shaft is drivenby a gear similar to the gear 33 which is fast on the supporting shaft'of the roller 30, the latter roller'being driven at its opposite end through suitable gears 37 conn'ectedwith an electric motor-'38. The belt 81 may also be positively operated to convey the trays awayfrom the elevator.

In the arrangement of tray supports shown in 6, the arms 39 of each tray support extend toward one lateral side of the elevator,

41 as seen 111 Flg. 6.

of the elevator, but where the longitudi 6c,

ited. shown in Fig. 7, the guide flanges 16"," adjacent to the chain 8 where it pastes so as to'receive between them a simplified take oil consisting ofa belt {tOi-uuui 9; upon a 'drum 41. Suitable transverse members 1-2 connect each pair of arms 39 to form a rigid Ward travel pass the end of the belt 4E0 beyond the drum 41; The tray supports are ranged to carry the trays with their centers of gravity to the left of the axis of the drum the form pf elevator shown in 7, a pair of'sproc'het wheels a3 are substituted for each of the wheels 22 and 21 of the preterred construction. This form of elevator permits the use of widertraysupports and jsmaller sproclret'wheels and is employed where space of greater width availablel'lor install:

space atthe ends of the elevator is'm ore limover the sprocket wheels 43, are formed in arcs which ar'e' concentric with the adjacent Spr ekgLyheels. take oif rollers 28,

re ame shown in Fig. 7, may be driven by extending the shaft 35 toward the vertical center plane of the elevator and driving said shaft through a suitable gear 44- thereon. Otherwise, the elevator of Fig. 7 may be made similar to that shown in Figs. 1 and 2.

Operation In operation, the chain 8 may be continuously driven in the direction indicated by arrows in Figs. land 7 to transport trays filled with dishes or the like from an upper level or floor 45 to the belt 81 or 40. A loaded tray may be placed on each of the supports 9 as soonas it arrives at its horizontal position between the upper ends of the walls 27 The guard plates 10 prevent the contents of the trays from projecting towards the chain Where there would be danger of striking parts of the elevator frame during the travel downward. Thus, each tray is lowered between the guides 27 until the arms 9? of the tray support pass therollers 28 when the tray is deposited upon said rollers. As soon as a tray is deposited upon the upper peripheries of the rollers 28, it is conveyed thereby successively to the roller 30 and the belt 31 and carried by the latter out of the way of succeeding trays. I

The operation of the arrangement shown in Fig.6 is similar to that above described except that the downwardly moving tray supports 89 deposit the trays directly upon the belt 40, which conveys them away from the elevator. The chain 8 of the elevator shown in Fig. 7 may be driven by power applied to one ofthe shafts supporting the sprockets 43. The tray supports 9 with their supporting carriers are thustraversed under the guidance of the flanges 16 To insure against breakage in a tray is allowed to remain on the rollers 28 or belt tO. an automatic stop for the motor may be provided. A suitable stop for this purpose is described and claimed in United States Patent No. l,l22,091 to W. T. Donaldson, dated July 11, 1922. Y a

It will be noted that the carrier guides ontend throughout their length in uniform spaced relation to the chain 8 so that there is no tendency for the tray carriers of light weight'to catch when passing between the curved portions of the guides, as would be the case if the usual, eccentrically"disposed guides were employed. Further, the proper horizontal position of the tray supports is maintained while they are passing along the straight portions of the guides because of my peculiar arr'angementsof carriers. Thus, the tray supports are, rigidly secured toithelcarriermembers 1 1,Ywhich are of ample length and always maintain their position substantially longitudinally of the chain 8, while the pivoted members 12 permit movement of the wheels 13 to conform to the guide flanges 16.

These features reduce friction to a minimum.

My invention has the further advantage of being adapted to raise a series oftrays along one longitudinal run of the chain 8 and at the same time to lower another series at the other side or run of the chain. When so used, the trays may be manually removed from the rising supports 9 by an attendant stationed upon the floor l5. To insure against breakage, which would result if a tray were allowed to remain on a carrier as it passed into the curved guides at the top, any suitable or well known switch, operable by engagement with the trays, may be placed near the upper end of the vertical guides and connected in the motor circuit. Further, when the elevator is used for raising as well as lowering trays, the guard plates 10 may be formed to extend at both sides of the supports 9 instead of at one side as illustrated.

Having described my invention what I claim as new and desire to protect by Letters Patent is:

1. In an elevator, the combination with sprocket wheels and an endless chain operable upon said wheels in a vertical plane, of a stationary guide having front and back surfaces extending in parallel relation to said chain and having arcuate portions adjacent to said wheels arranged substantially concentrically therewith, a carrier secured. to said chain, means on said carrier revoluble about axes parallel to said surfaces and continuouslv engaging the front and back sur faces of said guide, driving means for said chain and a support for the material to be conveyed disposed on said carrier to project adjacent to the faces of said wheels atone side only of the elevator during the operation of said chain.

2. In an elevator having a frame and sprocket wheels at the upper and lower ends of said frame, a single endless chain operable upon said wheels in a vertical plane, a stationary guide having front and back surfaces extendingin parallel relation to said chain, carriers secured to said chain at spaced intervals, said carriers having means for continuously engaging the front and back surfaces of said guide, said means being revoluble about ares parallel to said surfaces, drivmeans for said chain and a support for the material to be conveyed disposed on each carrier to project adjacent to the faces of said wheels at one side only of the elevator during the operation of said chain.

3. In an elevator, the combination. with sprocket wheels and an endless chain operable upon said wheels in a vertical plane, of a stationary guide having front and back surfaces extending in parallel relation to said chain and in a plane in front of the plane of said chain, said guide having arcua'te portions adjacent to said wheels arranged substantially concentrically therewith, car

secured to said chain at spaced intervals, said carriers having means for continuously engaging the front and back surfaces of said guide, said means being revoluble about axes parallel to said surfaces, driving means for said chain and a support for the material to be conveyed disposed on each carrier to project in front of the plane of said guide and at one side only of the elevator.

4. In an elevator, the combination with a pair of guides disposed in a vertical plane, said guides each having two longitudinal, straight portions, a carrier mounted between said guides, said carrier having a longitudinal member, spaced, transverse members secured to said longitudinal member and a wheel arranged on each lateral side of each of said transvese members, said wheels be ing disposed to run upon said guides, power driven means for traversing said carr er upon said guides and means projecting from said carrier to support the material to be conveyed.

5. In an elevator, the combination with a pair of guides disposed in a vertical plane, said guides having vertically extending straight portions and arcua-te upper and lower portions, an endless chain operable in a plane in the rear of said guides, a carrier mounted between said guides and secured to said chain, said carrier having a longitudinal member, spaced, transverse members 'secured to said longitudinal member and a pair of wheels arranged on each lateral side of each of said transverse members, the wheels of each pair being disposed to receive one of said guides between them, power driven means for operating said chains to traverse said carrier upon said guides and means projecting from said carrier in front of said guides to support the material to be conveyed.

6. In an elevator, the combination with a pair of guides, a carrier mounted between said guides, said carrier having a longitudinal member, spaced, transverse members pivotally secured to said longitudinal member and a wheel arranged on each lateral side of each of said transverse members, said wheels being disposed to run upon said guides and power driven means for traversing said carrier upon said guides.

7. In an elevator, the combination with a guide disposed in a vertical plane, a carrier mounted adjacent to said guide, said carrier having a longitudinal member spaced, trans verse members pivotally secured to said longitudinal member and pairs of wheels arranged on said transverse members to run upon the front and rear faces of said guides, power driven means for traversing said carrier upon said guide and a tray support rigidly secured to said longitudinal member and arranged to project in front of said guide in planes perpendicular thereto.

8. In an elevator, the combination with a pair of endless guides arranged in a vertical plane, said guides having vertically disposed straight portions-and curved upper and lower portions, an endless chain operable in a plane in the rear of said guides, a carrier mountet between said guides and secured to said chain, said carrier having a longitudinal member, spaced, transverse members pivoted upon said longitudinal member and a pair of Wheels arranged on each lateral side of each of said transverse members, the Wheels of each pair being disposed to receive one of said guides between them, power driven means for operating said chain to traverse said carrier upon said guides and a tray support rigidly supported on said carrier and projecting in front of said guides, said tray support being arranged to extend horizontally during the movement of said carrier between the straight portions of said guides, and being inverted during movement over the curved portions of said guides.

In testimony whereof, I have hereunto signed my name to this specification.

PETER o. WEGO.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2612983 *Dec 4, 1948Oct 7, 1952Allied Chem & Dye CorpShingle collecting and bundling machine
US2832396 *Dec 10, 1954Apr 29, 1958Cleveland Trust CoServicing apparatus for tread, breaker, and chafer stock
US2895274 *Dec 28, 1953Jul 21, 1959Fmc CorpMachine for handling eggs
US3593862 *Jun 27, 1968Jul 20, 1971Cutler Hammer IncInterfingering endless elevator and conveyor apparatus
US5109956 *May 26, 1989May 5, 1992Nunzio's Pizza, Inc.Food preparation and delivery apparatus and method
US5279392 *Apr 4, 1991Jan 18, 1994Nunzio's Pizza, Inc.Food preparation and delivery apparatus
US5287948 *Nov 18, 1991Feb 22, 1994Nunzio's Pizza, Inc.Food delivery apparatuses
WO1990014991A2 *May 22, 1990Nov 27, 1990Nunzio S Pizza IncFood preparation and delivery apparatus and method
Classifications
U.S. Classification198/801, 198/637
International ClassificationB65G47/56, B65G47/57, B65G17/12
Cooperative ClassificationB65G2201/0258, B65G2812/02752, B65G47/57, B65G17/12, B65G2201/06
European ClassificationB65G47/57, B65G17/12