US410759A - Phreys - Google Patents

Description

(No Model.) I ZSheets-Sheet I. W. P. HUMPHREYS.

DREDGING MACHINE.

No. 410,759. Patented Sept. 10, 1889.

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DREDGING MACHINE.

No. 410.759. Patented Sept. 10, 1889,

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UNITED STATES PATE T OFFICE.

. \VILLIAM P. HUMPHREYS, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO CHARLES DODGE, OF EST WVASHINGTON, DISTRICT OF COLUMBIA.

DRED GING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 410,759, dated September 10, 1889.

I Application filed March 26, 1889. Serial No. 304,780. (No model.)

had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to dredges, and has particular reference to, first, a means for manipulating an excavator or cutter to cause it to assume any desired angle of inclination; second, the construction of the cutter itself whereby its efficiency and capacity are i11- creased.

The following detailed description will fully explain the nature and purpose of my said invention and the manner in which it is carried into use.

The accompanying drawings illustrate what I consider a good means for carrying my invention into practice.

Figure 1 is a side elevation of an end por tion of a dredger-scow with my improvements attached. Fig. 2 represents the jointed operating-arms detached. Fig. 3 is a view of the adjusting-screw detached. Fig. 4 is an inverted view of the cutter or excavator having an open bottom with cutting or scraping arms extending from the hub outward. Fig. 5 is a similar View, on an enlarged scale, showing scrapers on the arms each extending the full radius of the bottom opening, the helical passages being indicated by dotted lines. Fig. 6 is a transverse central section of Fig. 5. Fig. 7 represent-s one of the arms with the detached scraper upon it. Fig. 8 is a section of Fig. 7 on line X X. Fig. 9 is an inverted plan of an excavator having scrap-' ers on the arms each covering only a portion of the radius from hub to edge of opening. Fig.10 is a perspective view of one .of the scrapers on a portion of an arm.

Similar letters of reference indicate corresponding parts in all the figures where they occur.

A is an end portion of a dredge-boat, and B a suitable standard or frame, from which the swinging end of a suction-pipe and the excavator are manipulated.

C is a block and tackle, the cable of which runs over suitable pulleys C C" to elevate and lower the swinging end of the suctionpipe and the excavator.

D is the swinging end of a suction-pipe, and D a ladder on which it is supported.

E is the excavator, which isof the revoluble type, and is connected to the end of the suction-pipe by a joint D*, and is held by a standard F, which is hinged to the outer end of the ladder. To the standard, or a part fixedthereto, the cable of the tackle is also attached. The excavator'is revolved by suitable gearing F, operated by a driving-shaft in the usual mannenwhich need not be particularly described. Extending from the top of the standard F into a suitable port-ion of frame 13 is a jointed arm, the members G G of which are pivoted to the standard and the frame, respectively, at their ends, and are united by a swiveling and sliding joint at their meeting ends, one member having a slot g, and the other a pin g, which works in the slot. By means of this joint the central portion of the arm can be raised and lowered, thus having a shortening effect and drawing the top of the standard F inward and changing the inclination of the excavator.

To accomplish the adjustment of the jointed arm, I prefer to attach the end of one of its members, preferably the slotted one, to a screw H, which has a hand-wheelh, by which the screw is raised or lowered. By this means the angle of the jointed arms is changed at will, and the angle of inclination of the excavator consequently changed as may be desired.

The excavator is of the revolving type, and its general construction and operation are the same as that shown in the application of J. H. Von Schmidt, filed January 22, 1889, Serial No. 297,183; but I have made certain improvements in the excavator, which I will now describe.

I provide in the center of the bottom of the excavator an opening of as greator greater area than the suction-opening above, and the helical passages leading from the periphery of the excavator to the excavator preferably terminate at the periphery of the opening. Extending from the hub to the periphery of the excavator are cutting-arms I, which span the semi opening and deliver the spoil which they dislodge under said opening into the excavator directly in line with the suetion-openin g above, while their curved ends sweep the spoil outside to the periphery of the center to be taken in through the helical passages. The arms I may be provided with scrapers J which, as shown in Figs. 5, 6, 7, and 8, may extend across opening e, and may be coincident in width with the cutting-arms, or may extend below their lower edge. These scrapers may be integral with or formed separate from the cutting-arms and have a curved face to catch the spoil and deliver it into the excavator, and act more efficiently than the arms alone.

Instead of having the scrapers extend from the hub to the circumference of the opening 6, they may be made of less length, as shown in Figs. 9 and 10, and set in echelon order on the different arms to cover the entire diameter of the opening 0 at each revolution of the excavator. These are preferably made to project below the arms, as shown in Fig. 10, and the curve is such as to prcsenttheir cutting-edge squarely against a radial line of the cutter, as will be seen in Fig. 9, to increase the taking power of the blades. There may be a standard F on each side of the excavator, and also twoj ointed arms to be operated in regulating the inclination of the excavator, one attached to each standard. Itis also evident that other regulating means besides the screw can be used to raise and lower the arm-sections. It is also evident that the scrapers, which are integral with the cut-tingarms, may be shorter than the radius of the opening in the bottom, and also that those formed of a separate piece may extend the full length.

Having thus described my invention, what I claim, and desire to secure by Letters Patcut, is-

1. The combination, with a suction-pipe, an excavator jointed to the suction-pipe, and a pivoted standard by which the excavator is jointed together attached to the top of the standard at one end and to a fixed portion of the dredge-boat at the other for regulating the inclination of the standard, as set forth.

2. The combination, with a suction-pipe, an excavator jointed to the outer end thereof, and a standard by which the excavator 1s carried, of an arm composed of two parts pivoted together and to the standard and dredgeboat at their outer ends, and a screw for regulatin g the elevation of the meeting pivoted ends of the two parts of the arm,as set forth.

The combination, with a suction-pipe, an excavator swung thereupon, and a pivoted standard, of a jointed arm composed of two members, one having a slot and the other a pin working therein, and an adjusting-screw attached to the end of one of the members of the arm, as set forth.

t. A rotary excavatorhaving cutting-edges on its sides and spoil-passages leading therefrom to the suction-opening, and a central circular opening in the bottom of equal or greater area than the suction-opening above, the center of said bottom opening being beneath the center of the suction-openin g.

A rotary excavator having cutting'edges on its sides and helical passages leading inward. therefrom and provided with a central opening in the bottom thereof, and cutting arms extending over said. opening, substantially as set forth.

6. A rotary cxcavatorhaving cutting-edges on its sides and passages leadinginward from said edges and provided with a central. opening in the bottom, and cutting-arms with scrapers upon them beneath said opening, as set forth.

7. A rotary excavator having euttingedges on its sides and passages leadinginward, and having a central opening in the bottom, and cutting-arms, each having a scraper integral with itself beneath the opening, as set forth.

8. A rotary excavator having cutting-edges on its sides and passages leading inward therefrom, and having a central opening in the bottom, and radial arms having their portions which span the opening hollowed on one side and provided with a lower protruding cutting-edge, as set forth.

In testimony whereof I ai'lix my signature in presence of two witnesses.

\VILLIAM. l. :IIUMPIIREYS. lVitnesses:

I. N. KALB, F. T. 1*. JOHNSON.

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