US875420A

US875420A - Excavator.

Info

Publication number: US875420A
Application number: US27787605A
Authority: US
Inventors: Charles A Frayer
Original assignee: Allis Chalmers Corp
Current assignee: Allis Chalmers Corp
Priority date: 1905-09-11
Filing date: 1905-09-11
Publication date: 1907-12-31
Anticipated expiration: 1924-12-31

Description

PATENTED DEG, 31

0. A. PRAYER.

EXOAVATOE. APPLICATION FILED SEPTJLIQOS.

SEEBTS-SHEET 1.

I N VEN TOR TTORNEi".

,EIUTNESSES: 6 /22 (45% Q/Q LK m $13,420, PATENTEID DEG. a1, 1907.

G. A. PRAYER. EXGAVATGE.

APPLICATION FILED SEPT. 11. 1905.

2 SHEETS-SHEET Z.

:rvwzssss: INVENTOR -'UNITED STATES PATENT oFFIoE.

CHARLES A. FRAYER, OF MILWAUKEE, \YISUUNSIN, ASSIGNOR TO ALLIS-CHALMERS COMPANY, OF MILWAUKEE, WISCONSIN, A. CORPORATION OF NEW JERSEY.

EXCAVATOR.

Specification of Letters Patent.

Patented Dec. 31, 1907.

Application filed September 11. 1905] Serial No. 277.876.

To all whom it may concern:

Be it known that 1, CHARLES A. FRAYER, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of \Nisconsin, have invented certain new and useful Improvements in Excavators, of which the following is a specification.

This invention relates to an Excavator,

and in using the term excavator, any.

mechanism is meant which is capable of ex: cavating or digging earth, sand, gravel, etc. The term excavator is therefore intended to include either a dredge or a power shovel.

The object of the invention is to so arrange the operating cables that they will relieve the dipper or operating part of the dredge or shovel of all twistingstrains due to material being caught at either side of the cutting edge of the dipper bucket.

In disclosing the invention the same has been applied to a-hydraulic dipper dredge, that is, a suction dredge in which the material is drawn up through the dipper by means ci. a stream of water drawn u by a centrifugal pump mounted upon the arge.

In the drawings: Figure 1 shows a vertical svct ion of the forward part of the barge upon which is located a hydraulic di )pcrdredge to which my invention is applied. Fig. 2 is a transverse vertical section of the same. Fig. 3 is a plan view.

Referring to the drawings, Fig. 1 shows the dredge in the act of digging. The suction pipe of a pump ends in a form of dipper 2,

comprising a bucket 3 and a handle 4. The handle may be extensible as shown. The

bucket is formed with a cutting edge 5 at the bottom and a guard or runner 6 at the top. This allows the dipper to slice oil the material a dipper dredge would, but it can only cuter the earth as the guard or runner is strikes the surface, it is prevented from burying itscll beyond the point desired. Across the mouth ol" the dipper, cutter bars 7 are vertically placed so as to cut the nniterial into slices and partially prepare it for the action 01' the water. These cutters arc necessary when clay is handled, but can be dispensed within sand or gravel work.

The dipper handle 4 is hollow and leads to a stone box 8, provided with grizzly bars J which are placed on a slant and divide the stone box into upper and power cmnpartments. The purpose of the grizzly bars is to separate large stones and boulders from the incoming stream of material, these accumulating in the upper compartment of the stone box and being periodically removed through a manhole provided for that pur use The lower compartment of the stone box has an outlet extending to the suction of the centrifugal pump. u a

The dip )er 2 is mounted upon trunnions 10, 11, see Fig. 2, so as to be swung in a vertical plane. The operating means for swingin the dipper in its working stroke consist

oi cables

12, 13, attached to the lower end of the dipper near or directly to the bucket 3. The points of attachment are spaceda'part transversely of the operating plane. The

cables

12, 13, extend from the lower end of dipper handle 3 to and around

sheaves

14, 15, Figs. 1 and 3, upon a swinging frame 16 which is mounted upon the forward end of the barge deck in supports 17, 18. From the

sheaves

14, 15,

cables

12, 13, extend upwardly.over sheaves 19, 20, Figs. 1 and 2, mounted at the top of the A-frame 21, Figs. 1 and 2. From the sheaves ll), 20, the

cables

12, 13, extend dmvnwardly to the winding drum 22. Turnbuckles 23, 24, Fig. 2, are conveniently placed. somewhere in the

length ol cables

12, 13, so as to provide for equal tensioning of these cables.

in operation the dipper 2 is swung up on trunnions 11), l l, by the winding up of

cables

12, 13, upon the drum 22 by engine mechanism not described. Should the bucket 3 strike an obstructionin the bank being excavated, and such obstruction be caught by the side cutting edge 01 the bucket, there will be a tendency to twist the dipper handle 4. This tendency is avoided by the connection of

cables

12, 13 to the ilippcr at points spaced apart, as plainly indicated in Fig. 2. All the strain caused by the obstruction as above, will, in the present invention, come directly upon one of the two

cables

12, 13, and prevent any twisting of the dipper handle 4.

In the present disclosure of the invention, the dipper is shown as telescopic, but this has no direct relation. to -the present inventlull.

In accordance with the )rovisions of the 1 patent statutes, the principle of o eration of has been describe together 1 the invention other means.

- operatin spaced a art transversely of the operating P bucket having an entering e e and a ham. le,

- a plurality o with the apparatus which is now considered torepresent the best embodiment thereof; but it is desired to be understood that the a paratus shown is merely illustrative and. tli at the inventioncan be carried out by What is claimed is Y 1. In an excavator, a dipper comprising a bucket having a cutting edge and a handle, and simultaneous o crating means for the dipper including. a urality of ropes spaced apart having space attachment to the dipper near its cutting edge;

2. In an excavator, a di per comprisin a bucket having a cutting edge and a handle, means for the dipper for the working stroke including a plurality of ropes spaced a art transversely of the operating p ane am havingattachment to the dipper ane an near the cutting edge of the dipper. 3. In an excavator, a dip er comprisin a means for the ipper including ropes spaced a art and having spaced attachment to the dipper near the entering edge of the bucket.

4. In an excavator, a dipper comprising a i and elevating and elevatin means for t e dipper including a plurality 0 ropes spaced apart and having .svaaeo horizontally spaced attachment to the di per and directed towards the entering edge 0 the dipper.

, 5. In an excavator, a dip er comprising a bucket having an entering e e and a handle 7 and means for elevating the i 'per' in a vertical lane including a plura ity of ropes s a art transversely of the elevating p ane an having attachment to the di per transversely spaced as to the elevating p ane and directed towards the entering edge of the dipper.

6. In an excavator, a dip er havin a cutting or entering edge and a handle, and flexible means for operatin the dipper having attachment to the ipper at points spaced apart but near the cutting or entering edge of t 1e dipper.

7. In an excavator, a dip er havin a cutting or entering edge an a hand e, and flexible means for operating the dipper having attachment to the dipper at points spaced apart, the said flexible means extending towards the cutting or entering edge of the dip- In testimony whereof I aflix my signature k in presence of two witnesses.

CHARLES A. FRAYER. Witnesses JOHN DAY, Jr., R. M. STONE.