US1240172A - Elevator. - Google Patents

Description

L.A.BRENEMAN.

ELEVATOR.

APPLICATION men was 3. me.

1,240,172. PatentedSept. 18,1917.

2 SHEETS-SHEET 2.

witnesses 2 11128711121" LOLZiS a. Breneznazz LOUIS A. EnENEMAN, OE'ST. PAUL, MINNESOTA, FACTURERS ASsocIATIoN, OF NORTH ST. :eAU

ELEVATOR.

- Application filed June 3,

the following is a specification.

My invention relates to improvements in elevators.

Elevators of the "type having endless traveling chainswith trays thereon adapted to automatically receive loads at various places.

' H of Fig.

and pointed connection wit Stations in their upward travel and discharge the same at various stations in their downward travel are widely used in mercantile establishments and other These trays are carried by hangers pivotally attached to the drive chain, and are provided with a frame, designed to prevent the tilting of said hangers in their upward and downward travel at the sides of the elevator. In crossing over from one side to the other at the top of the elevator, ency to t'p if the loads upon the trays are unbalanced, and my present invention has for its principal object to provide, in an elevator of the class referred to, simple and efi'icient means to prevent the tilting of the tray hangers at the upper turn of the elevator. I

Other objects are secured by various novel features of construction and combinations of parts which will be hereinafter described out in my claims. 1

Figure 1 is a front view of my improved elevator, showing but one of several tray hangers; Fig. 2 is a side view thereof; Fig. 3 is a diagrammatical view of the essential parts of my invention; Fig. 4 is a sectional view taken on the line 3; and Fig. 5 is a detail secof a tray hanger, showing its a drive chain. Referring to the accompanying drawings, I have used the numeral 10, with various sufiixes, to indicate the difi'erent parts of the elevator frame, which consists of inner and outer sets of channeled members oppositel arranged to provide ways for parts hereinafter described. The outer beams '10 form an elongated inverted U-shaped structure, the top 10 being semicircular in form. Inner bars 10 are secured by straps 11 upon the beams 10; in spaced parallel relation In the drawings,

tional view Specification of Letters Patent.

said hangers have a tend-- 1916. Serial No. 101,495.

therewith (Fig. 1), similarly secured to as EATENT cation.

ASSIGNOR To MINNESOTA MANU- L, MINNESOTA, A CORPORATION OE Fatented Sept. 18, 1917.

and a curved bar 10 is the curved beam 10".

A driving sprocket wheel 12 near the upper end of the frame is mounted upon a shaft 13 which is journaled in a bearing 14; on

a cross-piece 15, and said wheel turns within the frame and pa the ends of the bars 10 (Fig. 2).

17 near the bottom of the frame is furnished with a stub Shaft 18 sprocket wheel sses through slots 16 in An idler which is journaled in a bearing 19 on a cross-piece 20.

The drive chain 21 passes around said sprocket wheels 12 and 17 and the portions of the pass through W and bars 10.

which the sprocket driven through power pulley 22 or Tray hangers chainbetween said wheels ays between the beams 10 The drive shaft 13 upon wheel 12 is mounted is suitable gearing from a by other suitable means. 23 carrying trays 24 are secured at intervals to the drive chain 21. These hangers are identical and a description of one will sufiice for all. 'A hangercomprises a hanger bar 25 having at Its rear side an integral uide block 26, a boss 27 and ears 28 arranged respectively at the upper end, middle and lower end of said hanger bar.

A gear segment 29 is cast integral wlth or otherwise secured to the lower end of said hanger bar which end is flattened out to-form a plate 30 (Fig. 1)

overlapping said gear segment and pro- viding a segmental shoulder 31 (Fig. '1) in 32, secured in the around said gear. A p

hanger bar 25 guide block 26, 1

and passing s provided with a reduced -end 32 which serves as tain links in the chain- 21 and furnishes a connection between sai through the o a link pin for cerd hanger bar. and chain. The block 26 travels along the ways between' the channeled. members of the frame, the curved face 33' flanges thereof and the (Fig. 1) bearing against against the front curved edges 34 the webs of sai d channeled members.

(Fig. 5) bearing A we guide wheel 35 Ournaled on a pmtle 35 in.

the holds said hanger b 10 and 10, the ways interrupted .boss 27 also travels in the ways and ar against tipping movements. Between the ends of the guide bars in which the wheels 35 and guide. blocks 26 trave are to permitthe. latter over the driving spro'c ide assage of the et 12. During such travel of the guide block 26, the guide wheel 35 passes throu h the curved way at, 1 10 the top of the elevator. To supplement the guide wheel 35 and to hold the hanger bar 25 in upright position throughout the upper turn ofthe elevator, I arrange a spur gear 36 below the driving sprocket 12 which meshes with the gear segment 29 on the hanger bar as it passes over said sprocket. Said spur gear 36 is mounted on a shaft 37 journaled in bearings 38 and said shaft is supplied with a sprocket wheel 39 driven by a chain 10 from a sprocket wheel 41 on the drive shaft 13. The are of the curved way has a radius equal to that of the sprocket wheel 12 and the spur gear 36 is turned at such speed with respect to the travel of the chain 21 that the hanger bar 25 remains in vertical position.

At the turn at the bottom of the elevator, no such provision need be made to insure the upright position of the hanger bars for the reason that the trays in this situation are always empty and the hanger bars 25 are retained in upright position by gravity.

Guard strips 42 are fixed upon the frame, as illustrated in Fig. 1, in positions adjacent to the.path of the gear segments 29. These strips bear against said gear segments and straighten the hanger bars if they are out of plumb and insure the registration of the guide wheels 35 with the openings of the different ways.

A load upon a tray being offset from the connection between the hanger bar-'25 and chain 21 would cause considerable stress upon the connecting pin 32, if the lower end of the hanger bar were not supported or braced. I provide such a support in a roller 43 (Fig. 4) which is revoluble between the ears 28 and which rolls upon the frame members through that part of the path of said hanger where loads are carried, except in crossing from one side of the elevator to the other, and'while in this situation the segmental shoulder 31 bears against the side of the spur gear 36 and braces the hanger bar.

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

1. In an elevator, a frame, a pair of sprocket wheels revoluble on said frame and arranged one above the other, a chain passing over said sprocket wheels, means to drive the chain, a hanger pivotally attached to said chain, a tray on the lower end of the hanger, a gear segment on the hanger, a driven spur gear below the upper sprocket wheel arranged to mesh with said'gear segment and hold the hanger in upright position at the upper turn, and a segmental shoulder on the hanger adapted to slidably bear against the side of said spur gear at said upper turn, to support the hanger.

2. In an elevator, a frame having vertical ways at its sides and an arched way at the top thereof, a pair of sprocket wheels revoluble on' said frame and arranged one above the other, a chain passing over said sprocket wheels, means to drive the chain, a hanger pivotally attached to said chain, a tray .on the lower end of the hanger, a guide wheel on the hanger, above the point of connection with the chain, arranged to travel in said ways, a gear segment on the hanger beneath said point of connection, a driven spur gear below the upper sprocket wheel, said gear segment and guide wheel being adapted to cooperate respectively with said spur gear' and arched way to hold the hanger in upright position at the upper turn of the elevator, and a segmental shoulder at the outer edge of said gear segment designed to slidably bear against the rim of said spur gear and brace the hanger at'said upper turn.

3. In an elevator, a frame having vertical ways at its sides and an arched way at the top thereof, a pair of sprocket wheels revoluble on said frame and arranged one above the other, a chain passing over said sprocket wheels, means to drive the chain, a hanger having an integral guide block thereon adapted to travel in said vertical ways, a pivot passing centrally through said guide block and connected with said chain, a tray LOUIS A. BRENEMAN.

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