US792522A - Upper-tumbler bearing and ladder-support. - Google Patents

Description

No. 792,522. PATENTED JUNE 13, 1905. S. L. G. KNOX & W. FERRIS.

UPPER TUMBLER BEARING AN D LADDER SUPPORT.

APPLICATION FILED 00T.22

3 SHEETS-SHEET 1 @Vitvkooca No. 792,522. PATENTED JUNE 13, 1905. S. L. G. KNOX & W. PERRIS.

UPPER TUMBLER BEARING AND LADDER SUPPORT.

APPLICATION FILED OCT. 22, 1904.

3 SHEETS-SHEET 2.

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No. 792,522 PATENTED JUNE 13, 1905.

s. L. G. KNOX & w. FERRIS.

UPPER TUMBLER BEARING AND LADDER SUPPORT.

APPLICATION FILED 001222, 1904.

Suva-Mow 3 SHEETS-SHEET 3.

UNITED STATES Patented June 13, 1905.

PATENT OEEicE.

SAMUEL LIPPINCOTT GRISVVOLD KNOX, OF MILWAUKEE, AND WALTER FERRIS, OF SOUTH MILWAUKEE, INISOONSIN, ASSIGNORS TO THE BUCYRUS COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A CORPO- RATION OF WISCONSIN.

UPPER-TUMBLER BEARING AND LADDER-SUPPORT.

SPECIFICATION forming part of Letters Patent No. 792,522, dated June 13, 1905. Application filed October 22, 1904. Serial No. 229,655.

To all whom it may concern:

Be it known that we, SAMUEL LrPPINoorr GRIsWoLD KNOX, residing in Milwaukee, and WVALTER FERRIs, residingin South Milwaukee, county of Milwaukee,State of Wisconsin, citizens of the United States, have invented certain new and useful Improvements in Upper- Tumbler Bearings and Ladder-Supports; and we do'hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements in dredging or excavating machines, and has for its object to provide independent concentric bearings for the upper end of the ladder and the upper-tumbler shaft to permit the tumbler-shaft to be removed and replacedwithout removing the ladder from its normal position.

In machines of this general type it has heretofore been the practice to hinge the upper ladder end to the tower in bearings that are not concentric with the tumbler-shaft bearings in order to permit the tumbler-shaft to be readily removed and adjusted and because of the difiiculty of providing a suitable bearing for the ladder end, which would embrace the upper-tumbler shaft and not cause undue wear.

The present invention contemplates a provision'of concentric independent bearings for the ladder end and for the upper tumbler constructed and adapted to hold the ladder and upper tumbler in proper cooperative relation to secure the most efficient operation of the bucket-chain and to permit the upper-tumbler shaft to be removed, replaced, or adjusted without interfering with the support of the ladder end by its bearing.

In the accompanying drawings, Figure 1 is a side elevation of the upper portion of a dredge-tower embodying the present invention. Fig. 2 is a transverse vertical section thereof. Fig. 3 is a detail view of the upper end of one of the ladder-sections. Fig. 4 is an enlarged detail of the connection between the ladder end and its bearing. Fig. 5 represents the segmental plate for securing the ladder end to its bearing. Figs. 6 and 7 represent in plan and side elevation the casting forming the supports for the respective bearings. Figs. 8, 9, and 10 are a plan view, an end elevation, and a transverse section of the removable cap for the ladder end bearing.

Referring to the drawings, a (0 represent the framing constituting the tower of a dredging or excavating machine which supports the adjustably-inclined dredge ladder with its chain of excavating-buckets and the usual operating accessories, all of which is familiar to those skilled in the art.

Mounted upon the top of the tower is the upper-tumbler shaft 6, upon which is rigidly secured the tumbler 0, over which the dredgeehain passes. It is necessary, of course, that the tumbler-shaft be mounted in suitable journal-bearings, so that said shaft together with its tumbler may be freely rotated in the operation of hoisting the bucket-chain. It is also necessary that the upper ladder end be pivoted to the tower to permit the lower end to be swung inward and outward with respect to the tower.

As a means for supporting both the ladder end and the tumbler-shaft in independent concentric bearings two oppositely-arranged castings (designated generally by the reference-- letter (Z) are'mounted upon the upper portion of the tower. Each of said castings consists of a vertical side plate and a substantially horizontal top plate provided with anupwardly and laterally projecting bracket f, provided with a recess which is adapted to receive the tumbler-shaft 6 without engaging the same. A removable cap g, secured to the milled upper face of the bracket f, closes the recess aforesaid, so that the tumbler-shaft will be surrounded but not engaged with the bracket f aforesaid. On the inner side of said bracket f and cap g there is formed acylindrical bearing-stud 7b, which of course is concentric with f rfic the tumbler-shaft Z). The inner end of said hollow bearing-stud is milled out to form an annular recess Z. The ladder, which consists of the usual stiles v 7', connected with suitable cross-braces, is provided with separable straps or collars consisting of member j and cap Z", journaled for swinging movement upon the hollow studs h.

In order to support the ladder when the caps ii; are removed, segmental plates on, connected by suitable bolts to the ladder end, engage the annular recess 1 in the bracket f, so that the ladder end is held firmly and pivotally suspended on the lower portion of the hollow studs it between the flanges on the segmental plates m and the lower portions 7' of the collar on the stile ends.

The top face of each casting (1 adjacent to the bracket f is provided with a seat 0, which is adapted to receive the pillow-blocks which form the bearing for the tumbler-shaft b. Each of said pillow-blocks comprises a base 0, bolted to the seat a, a removable cap 7), and loose-fitting brasses r 8, provided with a central annular web which permits the brasses to rock in the pillow-block in order to render the shaft-bearings self-alining.

It is to be noted that the bearing for the ladder end and the bearing for the uppertumbler shaft are rigidly and accurately held in concentric alinement and that none of the weight of the ladder is imposed upon the tumbler-shaft, although the latter passes freely through the ladder-bearing. By removing the caps p p, 7i 712, and y g the tumbler-shaft may be lifted out of its bearings without in the least disturbing the suspended relation of the ladder, which is held in any position to which it may have been adjusted upon the lower portion of the stud it h by the segmental plates m m.

hat we claim as our invention is 1. In a dredging or excavating machine, the

combination of a supporting-bearing for the ladder end, and a journal-bearing for the 11pper-tumbler shaft concentric with the ladderbearing, said bearings being independent of each other.

2. In a dredging or excavating machine, the combination of a supporting-bearing for the ladder end, a journal-bearing for the uppertumbler shaft concentric with the ladderbearing, said bearings being independent of each other, and means for securing the ladder end to the bearing to permit the removal of the tumbler-shaft.

3. In a dredging or excavating machine, the combination of a supporting-bearing for the ladder end, and a self-alining journal-bearing for the upper-tumbler shaft concentric with the ladder-supporting bearing.

4:. In a dredging or excavating machine, the combination of a supporting-bearing for the ladder end, a self-alining journal for the upper-tumbler shaft concentric with the ladderbearing, and segmental plates connecting the ladder end with its bearing to support the ladder while the tumbler-shaft is being removed.

5. In a dredging or excavating machine, the combination of a tower and independent eoncentric bearings for the ladder end and the upper-tumbler shaft, said bearings comprising oppositely-arranged castings on the tower having separable self-alining bearing-blocks for the tumbler-shaft, separable hollow bearing-studs for the ladder end and segmental plates engaging annular recesses in said studs and attached to the ladder ends.

In testimony whereof we affix our signatures in presence of two witnesses.

SAMUEL LIIPINCOTT GRISWOlill KNOX. WALTER FERRIS. W'itnesses:

HARRY B. HAYDEN, PAUL G. Bonn.

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