US1376989A - Bucket elevator - Google Patents

Description

I I APPLICXTION FILED OCY- 7. I9l9. 1,376,989.

J. w. woons. BUCKET ELEVATOR.

Patented May 3, 1921.

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JOHN W. WOODS, OF WALLA WALLA, WASHINGTON.

BUCKET ELEVATOR.

Specification of Letters Patent.

Patent ed May 3, 1921.

Application filed. October 7, 1919. Serial No. 329,110.

T 0 all whom it may concern Be it known that I, Jorrn W. Woons, a citizen of the United States residing at Walla lValla, in the county of Walla Walla and State of Washington, have invented certain new and useful Improvements in Bucket Elevators, of which the following is a specification.

This invention relates to improvements in elevators being designed more particularly to elevate water and the like and has for its objects to provide means whereby the buckets of the elevator may be tipped and the contents thereof discharged without additional resistance to the driving mechanism; that affords escape of the air in the buckets during the filling operation thus completely filling the buckets; and a means to guard against a rapid descent of the buckets in case of breakdown simultaneously releasing the load.

lVith this and other objects in view reference is had to the accompanying drawings in which Figure 1 is a side elevation of the device with one side of the frame removed;

Fig. 2 is a front elevation;

Fig. 8 is a side elevation of the pivoted arms;

Fig. 4 is a front elevation of the pivoted arms;

Fig. 5 is a sectional elevation of the valve, showing in dotted lines the valve tipped by the pivoted arms;

Fig. 6 is a perspective view of the bucket with part broken away to show the position of the valve;

Fig. 7 is a side elevation partly in section, of the trunnions;

Fig. 8 is a one trunions;

Fig. 9 is a partial rear elevation showing the pivoted arms engaging the buckets; and

Fig. 10 is a partial rear elevation showing the position of the pivoted arms as buckets pass in their ascent.

With a further reference to the drawings like numerals will be used to represent like parts throughout and 1 represents the frame in which are journaled shafts 2 carrying sprocket wheels 3 about which are the usual chain belts 4.

The chain belts support the buckets 5 attached thereto by means of the trunnions 6 which consist of a rod 7, flattened at the half end elevation of the ends to be conveniently attached to the said chain belt, and a bearing attached to the rod 7 by the rivet 9, the whole being incased by a pipe 10 which is passed through the walls of the bucket at a point a distance from the bottom of the bucket greater than the radius of the upper sprocket wheel over which it passes, thus bringing the bucket in contact with the shaft of said sprocket wheel as it is passing over the upper center thereof,starting the discharging process in a manner that there is no increase to the load due to an interfering tripping mechanism acting on the bucket in its ascent.

The pipes 10 are maintained in their .longitudinal position in the buckets by means of the locknuts 11.

In the bottom of the buckets is a valve 12 mounted thereon bythe spring 13 with the. clapper over an orifice 14:, the spring normally maintaining the valve in the closed position.

Attached to and supported by the frame are a plurality of pivoted arms 15 extending transversely and positioned in the path of the ascending buckets and spaced to engage each one of the buckets on the ascending side to prevent a rapid descent in case of a breakdown. On one end of each of the pivoted arms is a portion 16 bentupward to register with the orifice 14c and engage the valve 12, and on the opposite end thereof is provided a stop 17 to maintain the said arms normally in a horizontal position. The arms are pivoted to a plate 18 by the bolt 19 or other means.

Conveniently attached to the frame at a point in juxtaposition with the lower descending buckets is a spring 20 positioned to engage the bottom of the lowest descending bucket in a manner to retard it and change its position in its line of travel so that the upper part of the bucket is the last to enter the water thus permitting the escape of all air during the filling operation.

In use the device is established in the material to be elevated and any suitable driving f wheel is mounted, and retained until the bucket passes over and deposits its contents into a chute 21.

Now in case of breakdown, as should the chain belt break, the buckets will immediately start on a rapid descent and with the pivoted arms positioned as shown the buckets almost immediately encounter these arms which simultaneously lifts the valve permitting theoontents to escape.

The break may now be repaired when convenient without further damage.

Having thus described my invention, I claim:

1. In an elevator, a frame, shafts journaled in said frame and carrying sprocket wheels, chain belts mounted on said sprocket wheels and carrying buckets, said buckets being pivotally attached thereto, with the point of attachment at a distance from the bottom of said buckets greater than the radius of said sprocket wheels, a spring member attached to the frame and positioned to engage and retard the bottom f said buckets to change the position thereof on said chain belts, and a combined means to prevent a reverse motion of the elevator and simultaneously release the load.

2. In an elevator, a frame, an upper and a lower shaft journaled in said frame, each of said shafts carrying a plurality of sprocket wheels, chain belts mounted on said sprocket wheels, buckets pivotally mounted on said chain belts, with the pivotal point at a distance from the bottom of said buckets greater than the radius of the upper sprocket wheels, said buckets arranged in a plurality of columns, with the buckets of each column in staggered relation to the buckets of the ad jacent column, a spring member attached to the said frame and positioned to engage and retard the bottom of said buckets, in their descent, to change the position thereof in the line of travel, and a combined means to prevent a reverse motion of the elevator and simultaneously release the load.

3. In combination with a bucket elevator, a bucket pivotally attached to the operating mechanism of said bucket elevator, with the point of attachment at a distance from the bottom of said buckets greater than the radius of the sprocket wheels over which said buckets pass, a combined brake and means for releasing the contents of said bucket simultaneously with the braking action, and a spring member attached to the frame and positioned to engage and retard the bottom of said buckets to change the position thereof in the line of travel.

In testimony whereof I afiix my signature.

JOHN W. WVOODS.

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