US272970A - Elevator - Google Patents

Description

(No Model.) 1 42 sheets-sheen 1.

' G. MITCHELL.

N. nuns. rhmmmmpher. wmv-gum. o.

(No Model.) 2 Sheets- Sheet 2.

G. MITCHELL.

' EL-EVATOR.

110.272,97@ Patented 11610.27, 1883.

wxmssses; yf gif 5 UNITED STATES PATENT OFFICE.

GOVE MITCHELL, OF LANGHORNE, PENNSYLVANIA.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 272,970, dated February 27, 1883.

Application led January 2, 1883. (No model.)

horne, Bucks county, Pennsylvania, have invented a new and useful Improvement in Elevators, of which the following'is a specification.

My invention relates to elevators for raising, grain, coal, 8m., also to dredging and excavating machines, and, in general terms, to all elevators which consist of `wheels supporting and giving motion to endless chains or wire ropes carrying buckets.

So far as I am aware, elevator-buckets have hitherto always been attached to the outside of the endless chains or other carriers employed, and have discharged their contents at the top only ofthe elevators-a method ot' construction which necessitated the driving of the carrier at a high rate of speed in order that the contents of the buckets should be discharged with impetus enough to carry them into or onto the depository provided.

My invention consists of apparatusf'or causing the buckets to dump their contents at any required height; also, in an arrangement of the buckets. by suspending them between two opposing endless chains or wire ropes by means of eXibly-connected bails, which allow the buckets to be inverted and their contents discharged as the buckets ascend.

In the annexed drawings, Figure 1 is a front view, and Fig. 2 a side view, of the complete elevator. Fig. 3 is a sectional elevation ofthe inner face of the oft' side b of the elevator.

The main frame is composed of two similar f and f are the buckets. They areprovidcd with hails consisting of the short shafts g and g', which project from their sides, the arms h and h', and the shalt i. These shafts. have bearings in the chains or wire ropes e'and e.

j and j are pins or stops projectingfrom the sides of the buckets. The arms h and h abut against these pins, and the springs lt k serve to confine the arms of the bail between themselves and the stopsjj when the buckets are in an upright position, as the bucket f is shown in Fig. 1.

m m mz m3 are L-shaped bars, bolted or otherwise secured to the parts a and b of the main frame by projecting beams '1t In.' fn? n3. The bars fm, m mz'fm3 constitute the ways upon which slide two adjustable carriages-viz., an outer carriage, consisting of the two L-shaped plates o and o', rigidly united by the cross-bar fixed on the shaftw and the latter on a shaft, y.' a' is a hand-wheel for operating the gears.

The plates o and g are cogged on their eX- terior edges, as shown in Fig. 1,forming racks into which the spur-wheels o and o mesh. Two similar danges, one of them, a2, being shown, are formed on the opposite sides of the buckets..

a3 is a pulley by which power is applied to the apparatus. Y

Cross-rods (indicated at a4, Fig. 3) extend from one to the other of the lower pair of sprocket-wheels. These rods are separated by equal peripheral spaces, which correspond with the spaces intervening between the points of suspension of the buckets.

a5 .is a flange extending across the exterior of the inside of the buckets.

The drawings show but three buckets; but it is to be understood that buckets are attached to the chains or ropes, with intervals of space between them equal to the peripheral distances between the cross-rods a4 of the lower pair of sprocket-wheels.

Preparatory to operating the elevator the adjustable carriages, with their inclined planes t t', dumping-pins s s', and zigzag guides u u',

2 i j @were are, by the action of the spur-Wheels e e and bevel-gears xx', (moved by the hand-Wheel a/,) raised or lowered to the height at which it is desired to have the buckets dump their contents. As the buckets pass around betweenV released from the influence of these springs the flanges a2 ofthe buckets are caught by the dumping-pins s s and held until, bythe upward movement ot' the bucket, it is inverted and its contents dumped onto the chute a, Flg. 3. As the iianges a2 are released from the dumping-pins the bucket-pins a7 enter the zigzag guides u and a', as'shotvn in Fig. 3, causing the buckets to right themselves.

The suspension of the buckets between the endless chains by means of ilexibly-connected bails having bearings in said chains, as set forth, is necessary to enable the buckets to be freely inverted and righted by the above-described action ot' the other parts as the buckets are carried up by the chains.

The adjustable carriages may be held in position at the required elevation by thumbscrews or equivalent means.

The above-described adjustable carriages, divested of their inclined planes, dumpingpoints, and zigzag guides, may be employed in connection with the vertical ways upon which they slide, and the endless chains or Wire ropes, when other modes of effecting the discharge of the buckets at variable heights are used-as, for instance, when the buckets are made each with a hinged side through which they can discharge their contents without being inverted.

I claimy l. In elevators, the adjustable carriages hearing inclined planes, dumping-pins, and zigzag guides, a bucket having flanges a2, pins a7, and a flexible bail, with its confiningstops and springs, in combination with endless chains or Wire ropes, in the manner and for the purpose substantially as set forth. Y

2. The adjustable carriages, consisting Vof plates o o', united, as by cross-bar p, and the plates q q', united, as by a cross-bar, r, in coinbination with upright Ways on which said carriages slide and the endless chains or Wire ropes, substantially as and for the purposeset forth.

GOVE MITCHELL..

Vitiiesses:

HARRY FALGE, J. E. SHAW.

Images