US724868A - Self-contained back-geared headstall for elevator-bucket dredges. - Google Patents

Description

BATENTED APR. 7, 1903.

. G. L. HOLMES. SELF OONTAINEDLBAOK GEARED HEAD STALL FOR ELEVATOR v BUCKET DREDGES.

APPLICATIONTILBD MAR. a1, 1902.

4 SHEETS-SHEET L H0 MODEL.

No. 724,868. PATBNTED APR. 7, 1903. G. L. HOLMES.

SELF CONTAINED. BAGK' GEARED HEAD STALL FOR ELEVATOR BUCKET DRE DGES.

AIPFLIOA'I'ION FILED MA? 31. 1902.

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No. 724,868. PATENTED APR. 7, 1903.

G. L. HOLMES. SELF CONTAINED BACK GEARED HEAD STALL FOR ELEVATOR BUCKET DREDGES.

- APPLIGATION FILED MAR. a1. 1902. I 30 MODEL. d v 4 SHEETS-SHEET a.

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SELF CONTAINED BACK GEARED HEAD STALL FOR ELEVATOR BUCKET DREDGES.

I APPLIOATION FILED MAR. 31, 1902. N0 MODEL. 4 SHEETS-SHEET 4.

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' UNITED STATES PATENT OFFIcE.

GEORGE LEWIS HO MES, OFCHIOAGO, ILLINOIS.

SELF-CONTAINED BACK-GEARED HEADSTALL FOR ELEVATOR-BUCKET DREDGES.

SPECIFICATION forming part of Letters Patent No. 724,868, dated April '7, 1903. Application filed March S 1902. Serial No. 100,685. (No model.)

To aZZ'whom it may concern:

Be it known that I, GEORGE LEWIS HOLMES, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Self-Contained Back-Geared Headstalls for Elevator-Bucket Dredges, of which the following is aspecification.

My invention relates to self-contained backgeared headstalls for elevator-bucket dredges.

Figure l is a side View of the dredge with my improvement in position. Fig. 2 is a rear view ofthe head portion. on the line 3 3, Fig. 2, with the gears omitted. Fig. 4 is a section on the line 4 4, Fig. 2. Fig. 5 is a detail section on the line 5 5, Fig. 4. Like parts are indicated-j'by the same letter in all the figures. j

A is the body of a dredge-boat having the timbersA A, the spud. Aaand the upper deck A the parts arranged so as to form a slot through which the elevator mechanism is free toswing. Suitably supported on the decking A is a platform A on which is mounted the head mechanism;

B is the base of a casting having a web B, a lateral inwardly-projecting portion B an up wardly-projecting part B suitably strengthened and provided above with the extended plate Bflhaving the upward projections B B for the screw-boltsB to longitudinally adjust the Wedgeblocks and the lowerjonrnal-bearing B for the driving-shaft B .:The wedgeblocks and journal-bearing are fixed in positionwhen once adjusted bythe bolts B At the other end of the baseB of this casting rises a similar standard, carrying similar parts similarly lettered, for the counter-shaft B The parts mounted on the base B are preferably all in one and the same casting. The bearing proper for the shaft B is B. The shaft B carries at each end, near to the journalbox B a small pinion B, which meshes with the gear B on the counter-shaft B The counter-shaft also carries a small pinion G at each end close to the gear B which in turn engages with the large gearO, which is keyed at O to the quill shaft 0 through which passes the driving-shaft B and which is supported in the bearing D. Associated, with each of these castings which have for their bases the plates 13 B is a Somewhat similar cast- .Fig. 3 is a section ing having a base-plate D, with anupwardlyextending web D an upwardly-extending standard-like part D and a laterally-projecting portion D at one end. This laterally-projecting portion D corresponds to the partB and they are coupled together by the bolts D D This standard terminates above in an extended plate D, with the upward projections D for the adjusting-bolts D for the wedges D which are adapted to raise and lower the bearing-plate. D on which the bearing D rests. The parts are ultimately secured in position by the bolts D and thus is provided on this casting, which rises on the base D, a suitable bearing for the quill-shaft C At the forward end of this base-plate and forming part thereof is a somewhat similar standard carrying a somewhat similar arrangement ofparts for suitably supporting the bearing D for the end of the shaft B Thus it will be understood that there are two of these castings quite similar to each other on both sidesof the slot through which the elevator mechanism operates, that a countershaft is journaled in adjustable bearings on each side of the slot, that a driving-shaft is journaled in adjustablebearings on the two outer frame-pieces, as I call thesecastings,

'and'jthat the quill-shaft is journaled on the two inner frame-pieces. These four framepieces, with their "associated parts, are se cured together by'suitable stretchers or cross connections, so as to form a rigid frame capable of supporting in proper position the ing or binding from the yielding of the parts. For this purpose the two frame-pieces on each side are secured together first by the bolts D asindicated and above explained. They shafts and obviate the possibility of springare also secured together at their forward ends by the stretchers E, shaped like an inverted V in cross-section, placed, as indicated, in connection with the Webs B and D to which the ends of the stretchers are securely riveted. The two innermost frame-pieces are secured together by the tubular stretcher F, the ends of whichare turned up'and suitably riveted to the webs D D They are also seby which it is secured, first, to the downspout G, and, second, to the head-chamber G It is shaped like an inverted V inside and is provided with strengthening-flanges G3 on its outer surface. As above indicated, the spout G passes downwardly from this plate on one side, and the trough G extends downwardly from the apex of this V-shaped plate in the opposite direction in substantial parallelism with the descending buckets of the elevator. In the inner frame-pieces the part D isextended upwardly at the rear, as indicated, and to it is secured one end of the angle-brace G, the other end of which is secured to the head-chamber to form an additional brace or stretcher connection for the parts at this point. Toward the forward ends of these inner frame-pieces is secured a bar J in the sliding box composed of the two parts J and J These two parts of the sliding box are held together above by the cross-boltJ and below by the bolt J and they have extended sides, so as to engage the flanges J J, which form a slideway for such box. Secured to said box by the cross-bolt J is the screw-bolt J, which passes through the two transverse pieces J J and is provided with a turn-nut J adapted when turned to move the bolt J up and down, and thus draw with it the box and also the bar J. On the bar J is the spool J over which the chain and buckets travel. Toward each end of the bar J is a casting J shaped, for example, as shown, and provided with suitable flanges and partsto receive the ends of the I-beams J .1, which I-beams extend downward toward the end of the elevator proper and are bridged or connected together by the cross-plate J At their lower extremities they are suitably braced, if desired, by the truss construction J and at their lower ends they carry the shaft J and sprocket-wheel J, on which rides the chain J with the buckets J". The lower end of this construction is supported by the adjustable mechanism K, which is not described in detail.

On the quill-shaft C toward the middle thereof, is an enlarged portion, as indicated in Fig. 4, and on this is secured a chain-driving device, which consists of the following parts: first, the pentagonal flanges L L; next, the pentagonal extensions thereof L L; next, a somewhat similarly shaped part L L with the sprocket-teeth L L thereon, and, next, the central filling-piece L All these parts are held together by bolts L L and secured to the shaft by the keys L L. This quill-shaft is, in effect, a head-shaft, and the sprocket teeth L referred to engage the chain, suitably shaped for that purpose, and drive it, with the conveyer-buckets.

I have not shown outside additional bearings for the driving-shaft; but it will be unhe, would of course be, simply the ordinary bearings for such a shaft.

The use and operation of my invention are perhaps sufliciently suggested by the foregoing description of the several parts. They may be further explained, however, as follows: The elevator mechanism, which passes down through the slot in the forward part of the boat, is capable ofbeing adjusted to any desired position by means of the devices K or any other devices properly organized for that purpose. The extension-frame, which carries the sprocket-wheel about which the excavating-buckets travel, is capable of longitudinal adjustment to take up the slack in the chain by the proper manipulation of the screw-bolts J J, which move the sliding-box and with it, of course, the rod J on which is secured, as explained, the I-be'ams of the extension-frame, and thus this extension-frame may be adjusted as to length. The headshaft is driven, as indicated, by the backgeared connection, the driving shaft and head-shaft having the same axis of rotation and the connection being made through the counter-shaft and the associated gears and sprockets, and thus the high speed of the driving-shaft is reduced to a low speed in the quillshaft or head-shaft. The high-speed shaft may be driven at either or both ends. By having the head-shaft or quill and the driving-shaft in close proximity to each other or, as in this case, concentric with each other I avoid the necessity of carrying the drivingshaft either forward or rearward to get out of the way of the chain, and therefore avoid the necessity of widespread or separated bearings and secure a solid self-contained bearing for the entire head-shaft mechanism. There is no chain or other such transmission device between the driving-shaft and the driven shaft, and by having the solid self-contained frame for the entire head construction I avoid the danger of having the parts pulled out of line which is incurred where there are separate supports on the sides of the slot and where the driving-shaft is separate from the driven shaft. Moreover, in the case of the use of driving-chains large sprocket-wheels are necessary in connection with the driven shaft or head-shaft, and in some cases they areas much as thirteen feetin diameter. This involves raising the head-wheel very high and throwing the receiving parts, toward which the material is discharged, too far toward the rear. All the bearings of all the parts on both sides are brought into such rigid relation that they can be easily lined up and can be kept in line. With regard to the cross-braces or stretchers it will be observed that while the framepieces are securely attached together by such cross-braces they are positioned so as not to interfere with the several parts. One of the cross-braces which bridges the slot is between the two chains in close proximity to the head-shaft IIO ' belt adapted to work on the sprocket-wheel.

most a vertical to almost a horizontal position withoutinterfering with either of these braces.

In the ordinary operation of the-device the material is brought up by the buckets and discharged into the head-chamber and thence into the spout G, and whatever'drip takes place is carried by the trough G back into the slot, so as not to interfere with the machinery or fall upon the deck.

The sprocket-wheel construction ing the chain and buckets is fullyillustrated in Figs. land 5 andisadevice ofgreat strength.

and well adapted for the particular purpose. Its parts are very securely attached together and mounted on the enlargement of the quillshaft, and they are also made very strong and solid, so as to perform the severe labor for 'which theyare intended. I have not detailed the particular construction of the chain; but it will be understood to be a species of link shown in Fig. 5. In Fig. 4 a section of this chain is shown and in Fig.1 a side view of. 'the same. 'The spool J on the bar J is intended to cause the chain to pass easily over.

the bar J, and the bar J serves to rigidly connect thetwo upper ends of the I-beams.

I claima 1. In a self-contained, back-geared headstall for elevator-bucket dredges, the combination of a high-speed driving-shaft with alow-speed drivenshaft in-close proximity thereto, and between the two sections of the chain and near the upper end or bend thereof gears and pinions-connecting one with the other and reducing the speed, and a dredge 'chain and buckets driven by such driven.

shaft.

2. In a self-contained back-geared head stall for elevator-bucket dredges, the combination of a high-speed driving-shaft with a low-speed driven shaft or quill concentric therewith, gears and pinions connecting one with the other and reducing the speed, and a dredge chain and buckets driven by such driven shaft. 1

3.- In a self-contained back-geared headstall for elevator-bucket dredges, the combination of a high-speed driving-shaft with a low-speed driven shaft orqui=ll-- concentric therewith, gears and pinions connecting one with the other and reducing the speed, a dredge chain and buckets driven by such driven shaft, and two outer frame-pieces in which the driving-shaft is journaledand two inner frame-pieces in which the driven shaft is journaled.

4.. In a self-contained back-geared head-x stall for elevator-bucket dredges, the combination of a high-speed driving-shaft with a low-speed'driven shaft or quill'concentric therewith, gears andpinions connecting one for driv-- with the other and reducing the speed, a

dredge chain and buckets driven by such driven shaft, two outer frame-pieces in which the driving-shaftis journaled and two inner f rame-pieces in which the driven shaft is journaled, and stretchers which rigidly connect the outer and inner frame-pieces in pairs.

. 5. In a self-contained back-geared headstall for elevator-bucket dredges, the combination of a high-speed driving-shaft witha low-speed driven shaft or quill concentric therewith, gears and pinions connecting one with the other and reducing the speed, a dredge chain and buckets driven by such driven shaft, two outer frame-pieces in which the driving-shaft is journaled and two inner frame-pieces in which the driven shaft is journaled, and stretchers which rigidly connect the two inner frame-pieces together. 6. ha self-contained back-geared headstall for elevator-bucket dredges, the combination of a high-speed driving-shaft with a low-speed driven shaft or quill concentric therewith, gears and pinions connecting one with the other and reducing the speed, 'a

dredge chain and buckets driven by such driven shaft, two outer frame-pieces in which the driving-shaft is journaled and two inner.

frame-pieces in which the driveushaft is journaled, and stretchers which connect the inner and outer frame-pieces rigidly together in pairs, and-other stretchers which connect the two inner frame-pieces'rigidly together.

7. A self-contained headstall for elevatorbucket dredges, comprising a rigid continuous support for carrying all the headstall mechanism, such support consisting of four frames, two on each side of the slot, the two of each pair rigidly connected together, and

the two pairs rigidlyconnected by stretchers which bridge the slot.

8. A-self-contained headstall for elevatorbucket dredges, comprising a rigid continu ous support for carrying all the headstall mechanism, such support consisting of four frames, two on each side of the slot, the two of-each pair rigidly connected together and the two pairs rigidly connected by stretchers which bridge the slot, said stretchers located one between the chains and the other below the chains, so as to permit the chainsto swing through a wide are without interfering.

stretcher in the lower rearwardpart of the. support, and both placed so as to permit the- Ychains to swing through a wide are without interfering-with such stretchers.

10. In a self-contained back-geared headstall for elevator-bucket dredges, the combination of a support, consisting of a series of frame-pieces coupled together-in pairs on the two sides of the slot and connected together across the slot, so as to form a substantially continuous and rigid support, counter-shafts, one on each side of the slot, a driven shaft, and a driving-shaft concentric therewith, all of such shafts mounted upon said support.

11. In a self-contained back-geared headstall for elevator-bucket dredges, the combination of a support, consisting of a series of frame-pieces coupled together in pairs on the two sides of the slot and connected together across the slot, so as to form a substantially continuous and rigid support, counter-shafts, one on each side of the slot, a driven shaft, a driving-shaft concentric therewith, all of such shafts mounted upon said support, and adjustable hearings on the support so that said shafts may be brought into alinement and held 'there by the rigidity of their common support.

12. In a self-contained headstall for elevator-bucket dredges, the combination of suitable supporting frame pieces on opposite sides of the slot, with a head-chamber attached thereto and forming a brace or bridge across the slot, and other bridges or braces across said slot to bring the frame-pieces into rigid relation.

13. In a self-contained headstall for elevator-bucket dredges, the combination of suitable supporting frame-pieces on opposite sides of the slot,with a head-chamber attached thereto and forming a brace or bridge across the slot, other bridges or braces across said slot to bring the frame-pieces into rigid relation, and suitable spouts depending from said head-chamber to carry away the material discharged therein.

14. In a headstall for elevatorbucket dredges, the combination of an extensionframe to carry the outer sprocket for the chain, with a transverse rod, such device containing such transverse rod, asupportingframe on which the driving-shaft for the chain is carried, and adjustments for such transverse rod, whereby it may be moved to extend or contract the extension-frame.

15. In a headstall for elevatorbucket dredges, the combination of an extensionframe to carry the outer sprocket for the chain, with a transverse rod on which it is pivoted, a supporting-frame on which the driving-shaft for the chain is carried, and adjustments for such transverse rod, whereby it may bemoved to extend or contract the extension-frame, said adjustments consisting of screw-bolts and movable boxes controlled thereby. I

16. In a self-contained headstall for elevator-bucket dredges, the combination of a suitable support with a driving-shaft mounted thereon, an extension connection mounted thereon independent of the driving-shaft, and an extension-frame attached to such connection, so that the extension-frame and the driving-shaft are retained in permanent relation to each other while such connection is movable.

17. In a self-contained back-geared headstall for elevator-bucket dredges, the combination of a supporting part, consisting of frame-pieces rigidly secured together, with a driving-shaft, a driven shaft, counter-shafts for the transmission of power from one to the other mounted on said support, and an extension connection for the extension-frame mounted on said support.

18. In a headstall for elevator-bucket dredges, the combination of a support on which the driving and driven parts of the headstall'are supported, with an extensionframe, a rod bridging the slot connected with the two sides of said extension-frame, and a spool on said rod over which the chain travels.

19. In a headstall for elevatorbucket dredges, the combination of a support on which the driving and driven parts of the headstall are supported, with an extensionframe, a rod bridging the slot connected with the two sides of said extension-frame, a spool on said rod over which the chain travels, and an adjusting device, whereby said rod and spool may be raised or lowered on the support with reference to the position of the driving-shaft, to extend or retract the extensionframe.

20. In a headstall for elevatorbucket dredges, the combination of a driven shaft with a sprocket-wheel thereon, consisting of side flanges, intermediate sprocket-carrying parts, means for keying the device to the shaft, and means for securing the several parts together in the form of a spool.

GEORGE LEWIS HOLMES.

Witnesses:

HOMER L. KRAFT, IRWIN W. WESTERLAND.

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