US665685A - Excavator. - Google Patents

Description

No. 665,685. Patented Jan. 8, 19m.

0. HETLESAETER.

EXCAVATOR; (Application filed Kay 7. 1000.

'2 Sheets-Sheet I.

(No Model.)

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No. 665,685. Patented Ian. 8, I90l.

0. HETLESAETER.

EXCAVATOB.

(Applicstion filed Kay 7, 1900.) (No man.) 2 sheets-sum 2.

UNITED STATES PATENT FFICE.

OLAF HETLESAETER, OF CHICAGO, ILLINOIS.

EXCAVATO R.

sPncIFIcA'r'IoN formingpart of Letters Patent No. 665,685, dated January 8, 1901.

Application filed May 7, 1900. Serial No. 155703. Lllo model.)

To all whom, it may concern:

Be it known that I, OLAF HETLESAETER, a citizen of the United States, residing in the city of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Excavators, of which the following is a specification.

My invention relates to excavators, particularly steam shovels and dredges, wherein the bucket-arm is pivotally supported upon the crane, and the crane is also revoluble.

The objects of my invention are, first, to provide means whereby the crane may be adjusted longitudinally upon the crane-support; second,to provide means whereby the bucketarm may be adjusted longitudinally upon its support, and, third, to provide a construction whereby the beams composing the crane and also the beams composing the pivotally-supported member of the bucket-arm may be easily removed for renewal or other purposes. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a side view of a portion of an excavator embodying my invention, said figure showing the bucket-arm, the crane, and a portion of the structure whereon the crane is mounted. Fig. 2 is a detail view taken transversely to the crane and showing the manner in which the crane-beams are supported in the crane-pivot. Fig. 3 is a detail view taken transversely to the oscillating lever of the bucket-arm and shows the manner in which the beams of said lever are supported in the pivot-blocks. Fig. 4 is a side View of the crane and oscillatinglever, showing in full lines the said parts in one position and in dotted lines the said parts in another position, illustrating the adj ustability of said parts. Fig. 5 is a plan view of a portion of the crane as shown in Fig. 4. Fig. 6 is a plan view of a portion of the oscillating -1ever as shown in Fig. 4. Fig. 7 is a detail View in plan, showing the construction of the end caps employed at the extremities of the beams of the crane and oscillating lever. Fig. 8 is a detail sectional view taken on the line 8 8 and looking in the direction of the arrows, Fig. 4, showing one of the end caps in position upon its beam.

tion 0, (partially shown in Fig. 2,) which enters a corresponding cylindrical aperture provided in the turret a, said aperture not being shown. Above said cylindrical portion csaid pivot has the laterally-extending annular flange or projection d, which rests upon the top of said turret a, thereby supporting said pivot and also forming a rest or support for the crane-beams e e. Said pivot has the portions f f, which extend above said cranebeams e and terminate at their upper extremities in the bosses or lugs gg. Said portions ffform center posts,which,in connection with the tie-rods h h,serve to brace and strengthen the crane-beams e. Said posts f project laterally over said beams e, thereby forming,in conjunction with the flange d,the recesses jj, which receive said beams c and permit said beams to slide longitudinally in said pivot. The crane-beams e e are substantially parallel and form the main body of the crane, said crane extending in both directions from said pivot b.

At the extremity of each of the beams e is attached an end cap it. (Shown in detail in Figs. 7 and 8.) Each of said caps 70 is attached to its crane-beam e by means of aboltm, which encircles the beam 6 and forms a clamp for attaching saidcaps to said beams. Said caps partially inclose the ends of the crane-beams e and are further held in position by means of the rods n, which extend along said beams and connect the caps upon the opposite ends thereof. Said rods 'n are threaded at their extremities adjacent to said caps 70 and are secured to said caps by means of the nuts 0 0. The rods h it, above mentioned, are also threaded at their extremities adjacent to the end caps k and extend from the lugs g upon the crane-pivot b to said end caps 10, being secured to the latter by means of the nuts 10 p. The said end caps It are preferably apertured to receive said rods h h, and said caps and the bosses g g of the post f are so constructed that considerable play is permitted to said rods to allow for the different positions of the latter when the crane is adjusted to different positions. Said end caps are adapted to receive the cross-shafts q g, which extend between the crane-beams e e and serve as distancepieces for holding the same in their proper relative positions. The said end caps 70 are thus securely held in place Without necessitating the cutting of apertures in the cranebeams for bolts or rivets. It is obvious from the above description that the posts ff upon the crane-pivot b and the rods It it constitute the thrust and tension members, respectively, of a simple truss. As said beams e are movable longitudinally in the crane-pivot b and as the extremities of the rods h are threaded, it follows that 'said crane-beams may be adjusted longitudinally by varying the positions of the nuts 19 upon said rods h and moving the crane-beams to the desired position in said pivot. On one of said shafts q are mounted the pivot-blocks 'r r, which rotate upon said shaft and support the parallel beams s s of the oscillating lever. Said blocks 1' have the approximately U-shaped recesses t at their upper extremities, which receive the said beams s in the manner shown in Fig. 3. A lever-post u is secured to each of said blocks r above said beams s, the base of said post coming approximately flush with the upper surface of said beam, and thus confining said beam in said block, but permitting said beam to move longitudinally therein. Upon their outer lateral surfaces the blocks r carry the lugs 12 o, to which the rods w w are attached. The lever-posts u have the bosses as a; at their upper extremities, which serve as means of attachment for the tie-rods y y. The oscillating lever of which said beams s s are the principal members extends in both directions from said blocks r. At each extremity of said beams s are the end caps Z Z, which for convenience of manufacture are identical in construction-and purpose to the end caps 7c 70, above described. Said caps Z are held in position by the bolts 2 2 and also by the rods 20 wand y 3 above mentioned, said rods to and y being secured to said caps by means of the nuts 8 3 and 4 at, respectively. Said rods to and y are threaded at their extremities to receive said nuts 3 and 4 and are of sufficient length to permit the adjustment longitudinally of the beams sin said blocks r. At the upper and lower extremities of the oscillating lever are the cross-shafts 5 and 6, respectively, which extend between the beams s s and constitute distance-pieces therefor, said shafts being attached to the respective end caps Z Z. The distance-piece 7 extends between and is fastened to the pivot-blocks r at the opposite sides of the oscillating lever. The disposition of the posts 14 and rods y is such that the beams s s are trussed, and by the use of the end caps Z Z it follows that the oscillating lever is rigidly braced and stiffened without the use of bolt or rivet holes in said beams. The

oscillating lever above described is particularly adapted for use in connection with a linkwork bucket-arm, an arm of this type having been described by me in an application for patent filed September 7, 1899, Serial No. 729,706.

In Fig. 1 of the present drawings is shown a linkwork bucket-arm, the part indicated by the reference-nu m eral 8 constituting a thrustsegment pivotally supported upon the shaft 5 at the upper extremity of the oscillating lever. Said segment is adapted to receive the application of power for operating the bucketarm. In said Fig. 1 the bucket-handle 9 is pivotally attached to said thrust-segment 8 by means of the shaft 1( located at the rear extremity of said segment and at the upper extremity of said bucket-handle. At the lower extremity of said handle is carried the excavator-bucket 11, which is rigidly attached to said handle and is of the ordinary construction. The shaft 12, located, preferably, near the lower extremity of said handle, also is connected with the lower extremity of the oscillating lever by means of the bucket-links 13, which extend between and are articulately attached to the shaft 6 in said lever and also to the shaft 12 in said bucket-handle. The said links 13 preferably extend-in a forward direction from said oscillating leverthat is, in such a direction that the bucket-handle 9 traverses the line of said lever. By this con struction the bucket is projected to a convenient position in front of the bucket-arm, and when the bucket is moving in a forward direction taking a cut the links 13 are under compressive strains. It is obvious that as said oscillatinglever,thrlist-segment, buckethandle, and bucket-links are pivotally connected together said members are movable relatively to each other and, moreover, that the distance of the bucket 11 from the shaft q is dependent upon the positions of the members of the bucket-arm relatively to each other and relatively to the crane. The distance to which the bucket may reach in discharging is effected both by the position of the bucket-arm in the pivot-blocks r and also by the position of the crane in the cranepivot b.

To adjust the crane in the crane-pivot, the nutspp on the rods h h are loosened, and the beams e 6 may then be moved longitudinally to the desired position. For example, if it is desired to shorten the effective length of the crane between the turretct and the shaft q, whereon the bucket-arm is mounted, the nuts p upon the rear rods y are backed OE and the beams e are slid rearward, so as to ap proach the position of the beams shown by the dotted lines in Fig. 4. When the desired position of the crane is reached, all of the nuts 19 p are tightened into position against their respective end caps and the crane is once more secure upon its pivot b. It will be noticed that as the said rods It always extend from the center post f to the end caps 7c the crane is always trussed completely to the extremities thereof. Moreover, this adjustment maybe made without removing said end caps from their respective beams 6, nor is it necessary to disturb the rods n. If it is desired not to have long threaded portions on the rods 71 h, rods of special lengths may be provided and substituted for said rods h as the positions of the crane may require. In a similar manner the lever-beams s 3 may be adjusted in the pivot-blocks r by loosening the nuts upon the rods to w and rods y y. If it is desired to decrease the working length of the oscillating leverthat is, to decrease the distance between the said blocks 2' and the shaft 6 at the lower extremity of said leverthe nuts 3 and a are backed off by unscrewing the same along the rods to and 3 respectively, and subsequently sliding the beams s to the desired position in the said blocks 1. When the proper position is reached, all of the said nuts 3 3 and at 4 are tightened into place against their respective end caps Z Z. This last-described adjustment of the lever may be made without removing said end caps from said beams s, as said caps are held in position thereon by means of the bolts 2. As the said rods 'y extend from the center post u'to the said end caps, the oscillating lever is always trussed completely to the extremities thereof.

WVhen employed in connection with the linkwork bucket-arm, as shown in Fig. 1, the upper extremity of the oscillating lever dc termines, approximately, the power leverage and the lower extremity of said lever'the load leverage of the linked structure which constitutes the bucket-arm. Therefore by decreasing the length of the oscillating lever below the pivot-blocks r the force requisite to operate the bucket-arm becomes relatively less. Conversely, when the distance between the blocks 1' and the shaft 6 is increased the 'force requisite to operate the bucket-arm becomes relatively increased.

The effects of the adjustment of the crane and of the oscillating lever may supplement each other, as the working lengths of both the crane and of the oscillating lever may be simultaneously increased orsim ultaneously decreased. When the working lengths of said crane and said oscillating lever are extended, as shown in the full lines in Fig. 4, the shaft 6 may reach to a greater distance from the turret a than if only one of the said parts were adjustable.

Certain features of the crane-support and crane herein shown are described and claimed by me in a separate application, numbered as 1 in a series of four applications filed this day.

What I claim as new, and desire to secure by Letters Patent, is

l. In'an excavator, parallel beams slidingly supported and adjustable with'reference to their-points of support in the direction of their length, for the purpose of regulating the position of the bucket; in combination with a part for supporting said beams; and tension rods attached at one extremity to said beams, and at the other extremity to said part wherein said beams are supported.

2. In an excavator, parallel beams slidingly supported and adjustable with reference to their points of supportin the direction of their length, for the purpose of regulating the positionof the bucket; in combination with a part for supporting said bean1s,said part having a projection laterally removed from said beams, and tension-rods attached at one extremity to said beams, and at the other extremity attached to said projections, thereby forming a trussed structure.

3. In an excavator, a pivoted crane, the nether support of which is located at a single point intermediate of the extremities of the crane, said crane being adjustable horizontally upon said support.

4. In an excavator, a crane consisting of a beam or beams, the nether support of which is located at a single point beneath said crane, said crane being slidingly mounted upon said support; in combination with means for trussing said crane.

5. In an excavator, a crane, a pivot forming the sole support of said crane, a frame or turret for revolubly supporting said pivot, and means for adjusting said crane in a horizontal direction upon said pivot.

- 6. In an excavator, the combination of beams forming the principal members of the crane; a crane-pivot forming the sole'nether support for said beams, and permitting the longitudinal adjustment of said beams; and rods connected with said crane-pivot, and also connected with said beams, said rods affording means whereby said beams may be, when adjusted, held in position upon said cranepivot.

7. In -an excavator, the combination of beams forming the principal members of the crane; a crane-pivot wherein said beams are supported and wherein said beams may slide in the direction of their lengths; said pivot having portions extending above said beams and affording means of attachment for tension-rods; tension-rods connected to said extended portion of said crane-pivot, and extending to the extremities of said crane; and means for adj ustably connecting said tensionrods to the extremities of said crane.

8. In an excavator, the combination of a turret; a crane-pivot revolubly supported in said turret; parallel crane-beams slidingly supported in said turret; extensions on said pivot arising above said crane-beams and affordin g means of attachment for tension-rods; end caps secured to said beams at the extremities thereof {and tension-rods connected to said cranepivot at the said extremities thereon, and attached to said end caps.

9. In an excavator, a linkwork bucket-arm, one of the members whereof is an oscillating lever adjustable in the direction of the length thereof, and means for trussing said lever.

10. In an excavator, the combination of a revoluble crane and a compound bucket-arm, the supporting member of said arm being pivotally' supported on said crane and adjustable on said pivot in the direction of the length of said supporting member, said supporting member being unattached to said bucket.

11. In an excavator, a crane, blocks pivotally supported on said crane, and a linkwork bucket-arm, one of the members of said arm being composed of a beam or beams longitudinally adjustable in said blocks, in combination with means for adj ustably securing said beams in position in said blocks.

12. In an excavator, the combination of a pivoted crane; pivot-blocks supported upon said crane; beams slidingly supported in said blocks; parts attached to said blocks and extending above said beams; said projecting parts forming means of attachment for tension-rods; and, tension-rods connected to said upwardly-projecting parts on said blocks,said rods being also connected to the extremities of said beams.

13. In an excavator, the combination with a pivoted crane adjustable in the direction of the length thereof, and an oscillating lever pivotally supported upon said crane, of a bucket-handle extending in the general direction of said oscillating lever, and links connecting the adjacent extremities of said bucket-handle and oscillating lever.

14. In an excavator, the combination of a crane adjustable in the direction of its length; a linkwork bucket-arm pivotally supported upon said crane, one of the members of said arm constituting an oscillating lever, which is pivotally attached to said crane and forms the support for said bucket-arm, said lever being longitudinally adjustable upon its su pport; a second member of said arm extending in the general direction of said oscillating lever; a thrust-segment connecting the upper extremity of said oscillating lever with said second member; and connections between the lower extremities of said lever and said second member; and a bucket attached to said second member at the lower extremity thereof.

15. In an excavator, the combination of a crane; a crane-pivot forming the sole nether support for said crane and permitting the lon gitudinal adjustment of said crane; and rods connected with said crane-pivot and also connected with said crane, said rods aifording means whereby said crane may be, when adjusted, held in position upon said crane-pivot.

OLAF HETLESAETER.

\Vitnesses:

HOWARD M. Cox, ARTHUR M. Cox.

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