|Publication number||US683775 A|
|Publication date||Oct 1, 1901|
|Filing date||Dec 15, 1900|
|Priority date||Dec 15, 1900|
|Publication number||US 683775 A, US 683775A, US-A-683775, US683775 A, US683775A|
|Inventors||Millard F Kirkpatrick|
|Original Assignee||Millard F Kirkpatrick|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (11), Classifications (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
No. 683,775. Patented Out. I, I901. M. F. KIRKPATRICK.
DIPPEB FOB STEAM SHOVELS (Application filed Dec. 15, 1900., (No Model.)
UNITED STATES PATENT OFFICE.
MILLARD F. KIRKPATRICK, OF BOISE, IDAHO.
DIPPER FOR STEAM -SHOVELS.
SPECIFICATION forming part of Letters Patent No. 683,775, dated October 1, 1901.
Application filed December 15, 1900- Serial No. 40,017. (No model.)
To all whom it may concern:
Be it known that I, MILLARD F. KIRKPAT- RICK, a citizen of the United States, residing at Boise, in the county of Ada and State of 5 Idaho, have invented a new and useful Dipper for Steam-Shovels, of which the following is a specification.
This invention relates to improvements in steam-shovels, but more particularly to a novel dipper designed to be employed in connection with that class of steam-shovels which are characterized by a powerful crane operated by suitable mechanism to effect the raising, lowering, and transportation of the dipper, which in this case is especially adapted for mining operations.
In hydraulic placer-mines, where there is a large percentage of heavy rocks with insufficient grade and water to move them, their rewith great difficulty and is ordinarily accomplished by means of crude forms of derricks, wheelbarrows, and other devices, which are merely supplemental to a vast amountof hand-labor attained by disproportionate expense and imperfect results.
The object of the present invention, therefore, is to equip a portable steam-shovel with a novel form of screen-dipper or dipper-grizzly, which as the shovel is propelled along the track laid along the race or ground-sluice as close to the work as the caving of the bank will permit will remove the rocks as fast as they are driven to it by the giants, the small stones and pebbles and gold-bearin g sands being allowed to pass through the walls of the dipper or grizzly and to drop back in the sluice for the rescue of value in the ordinary manner.
A further object of the invention is to equip such a dipper or grizzly with one or more spray appliances designed to project water under pressure into the dipper for the purpose of Washing the gold-bearing sands from among the rocks being handled, so that when the rock is deposited on the bed of rock previously cleaned they will contain absolutely no value.
Practical experience as manager of hydrau 0 he placer-mines has demonstrated that when thirty-three and one-third per cent. or over of the loose rocks are more than two inches in inoval from the ground-sluices is attended diameter, With an available grade of two and one-half per cent., the amount of gravel handled in a given time by the use of this device will be more than four times greater than by present methods.
To the accomplishment of the objects stated the invention consists in the construction and arrangement of parts to be hereinafter described, illustrated in the accompanying drawings, and defined in the appended claims.
In said drawings, Figure l is an elevation of a portion of a portable steam-shovel equipped with my screen dipper or grizzly. Fig. 2 is a transverse section through the dipper on a somewhat enlarged scale. Fig. 3 is a central longitudinal section thereof; and Fig. 4 is a transverse section of a modified form of dipper.
Referring to the numerals employed to designate corresponding parts throughout the views, 1 indicates the derrick-arm of a steamshovel of any well-known type designed to be propelled upon tracks laid along the groundsluice and comprehendingsuitable supporting and operating mechanism for the derrick-arm 1 and for the dipper-handle 2 carried thereby and designed to facilitate the raising,lowering, swinging, and other manipulation of the dipper 3 to facilitate the loading, transportation, and unloading of the dipper in a manner Well understood in the art. The dipper 3 is hinged to the handle 2 by means of the usual hingeframe 4, hinged to the opposite sides of the bucket-frame 5 adjacent toits bottom. From the front end of the dipper, which is open as usual, extend the ordinary cutters 6, and the position of the bucket with respect to the handle is controlled by the dipper-bail 7, supported by the padlock-sheave frame 8, inclosing the usual padlock-sheave, around which passes the chains 9, passed around the sheaves 10, carried at the outer end of thearm l and constituting mechanism for controlling the position of the dipper.
The dipper as thus far described and its mounting are of substantially ordinary form, and the dipper is designed to be handled in the ordinary manner of its use-as, for instance, upon railway excavations; but I shall now proceed to describe those peculiarities of construction which render a steam shovel equipped with my novel dipper applicable for employment in mining operations, as heretofore stated.
The. side walls of the dipper 3 and the hinged bottom 11 thereof instead ofbeing solid, as usual, are made up of an open-work structure, which while enabling the device to elevate large rocks will permit small rocks, pebbles, and gold-bearing sand to escape and drop back into the sluice. The specific character of these open-work walls is not essential so long as the structure converts the dipper into a screen or grizzly permitting the escape of the small gold-bearing pebbles and sand. In the drawings, however, I have illustrated the side walls of the bucket as made up of spaced slats 12 and the bottom 11 as having a latticed configuration, as best shown in Fig. 2.
The device as thus far described constitutes a complete embodiment of my invention in its broadest aspect, since it comprehends a screen-dipper for steam-shovels and without addition would prove a valuable accession to the operating machinery of hydraulic placermines. I desire, however, to also remove all value-bearing sand from the crevices of the larger rocks removed from the sluice by the dipper. To this end I provide one or more spray pipes or heads 13, extending within the dipper from end to end thereof and at a convenient point or points adjacent to the wall. A preferable location for the spray-pipe is at the upper side-that is to say, at a point diametrically opposite the cutters, as shown. The spray pipe or pipes are provided with a number of jet-openings 14 in their side walls and preferably have their ends closed by heads 15. Any means for supplying water under pressure to the spray-pipe may be adopted; but I prefer to provide a nipple or connection 16 intermediate of the ends of the pipe and projected through the wall of the dipper for the attachment of a flexible hose or other suitable conduit 17.
The operation of my device is as follows: The dipper is depressed into position to receive the rocks as they are driven to it by the giants and is then elevated for the purpose of depositing the rocks on the previouslycleaned bed-rock at the side of the sluice. During this transportation of the dipper the gold bearing sand and pebbles will drop through the open walls quent treatment in the usual manner. At the same time water under pressure is supplied to the spray-pipes and is projected in numerous jets against the large rocks within the dipper, washing them thoroughly, so that when they are deposited they will be absolutely clean and free from value.
In Fig. 4: of the drawings I have illustrated a modification of my dipper, which consists merely in constructing it of substantially semicircular form.
From the foregoing it will appear that I have invented a screen dipper or dippergrizzly for portable steam shovels which thereof for subse-' adapts this class of devices for effective use in hydraulic or other placer-mines but while the present embodiment of the invention appears at this time to be preferable I do not wish to limit myself to the precise construction and arrangement shown, as it is evident that various changes, modifications, and variations may be effected to adapt the device for all classes of work without departing from the spirit of the invention.
What I claim is 1. A dipper for steam or other shovels, and means for removing loose particles from the contents thereof.
2. A dipper for steam or other shovels having means upon the interior thereof for removing loose particles from the contents of the dipper.
3. A dipper for steam. or other shovels provided with means for washing the contents of the dipper to efiect the removal of loose particles, as for instance, from rocks being handled by the dipper.
4. A dipper for steam or other shovels, provided with a spraying device for projecting liquid under pressure to the interior of the dipper to wash the contents thereof.
5. A dipper for steam or other shovels, said dipper having its walls formed for the escape of sand, gravel, &c., and provided with means for detaching loose particles from the objects, as for instance, rocks being handled by the dipper, to permit the escape of said particles through the wall thereof.
6. The combination with a dipper of the character described formed with open-work walls, of a washing device disposed to project Water into the dipper for the purpose of washing the contents thereof.
7. The combination with a dipper of the character described formed with open-work walls, of a spraying device disposed upon the interior of the dipper, and means exterior to the dipper for supplying water under pressure to the spraying device located therein.
8. The combination with a dipper of the character described,provided with open-work walls, of a spray-pipe located within the dipper at its upper side and extending from end to end thereof, the wall of said pipe being pierced by numerous jet-orifices, and a flexible supply-pipe disposed exterior to the dipper and connected to the spray-pipe to supply fluid under pressure thereto.
9. In a steam or other shovel, the combination with a derrick arm and handle, of a 1 hinged dipper carried by the handle and formed with open-work walls to permit the escape from the dipper of small particles as for instance sand and gravel, a hinged bottom closing one end of the dipper and designed to permit the dumping of the larger objects, as for instance, rocks handled by the dipper, means for projecting a spray into the dipper to detach value-bearing particles from the rocks being handled, and means for effecting the manipulation of the dipper to facilitate the loading, transportation, and unloading thereof.
10. A dipper for steam or other shovels having open-work Walls, and means upon the interiorof the dipperforremovingloosepartioles from its contents, whereby said particles escape through the walls of the dipper while I the contents thereof are retained.
In testimony that I claim the foregoing as my own I have hereto affixed my signature I in the presence of two Witnesses.
lVIILLARD F. KIRKPATRICK.
E. 0. 0001:, JOHN H. MYER.
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