US468197A - Gravel-screening machine - Google Patents

Description

Patented Feb. 2, 1892.

P. T. GILBERT. GRAVEL SCREENING MACHINE.

(No Model.) m

l/VVENTUH Iran/U61 1' 62760 6 By M ATTORNEYS UNITED STATES PATENT OFFICE.

FRANKLIN 'l. GILBERT, OF WALLA ALLA, ASSIGNOR TO SUSIE M. RUSSELL, OF SEATTLE, YVASIIINGTON.

GRAVEL-SCREENING MACHINE.

SPECIFICATION forming part of Letters Patent No. 468,197, dated February 2, 1892.

Application filed September 25,1891. Serial No. 406,875. (No model.)

To LLZZ whom it may concern.- ing at a point in advance of the rear end of Be it known that I, FRANKLIN T. GILBERT, the side walls Z2 whereby a discharge-oped residing at Walla Valla, in the county of ing b is provided for a purpose presently exlValla \Valla and State of \Vashington, have plained, wedge-like converging blocks 12 be- 5 invented certain new and useful Improveing secured upon the inner faces of the ends ments in Gravel-Screening Machines, of which of the walls 6 which serve as directors for the following is a specification. the flowing Water to concentrate its precipi- My invention has for its object to provide tation into the next underlying trough to a gravel-washer in which a continuous treatthereby prevent any of the water flowing I0 ment of the gravel is obtained, whereby a outside.

number of separations of the coarser from the By reference to Fig. 2 it will be seen that finer grades of gravel will take place; and it the mixed water and gravel after it enters the consists in the peculiar combination and hopper C from the flume D enters a trough B novel arrangement of parts, all of which will constructed similar to the troughs B B B I 5 hereinafter be fully described in the annexed which lead the water and gravel to discharge specification, and particularly pointed out in against a separator-screen D, hinged at its the claims, reference being had to the accomlower end to the closed end of the trough B, panying drawings, in which the upper end of such screen projecting above Figure 1 is a perspective view of my imthe discharge end of the trough B By pro- 20 proved gravel screener or separator. Fig. 2 viding the opening 11 in the bottom of the is a longitudinal section of the same. Fig. 3 troughs anopportunity is given for such gravel is a detail perspective view of one of the or sand as will not pass through the screen screens and its attached trough or chute, and to drop into the bin a below it. Fig. 4 is a detail perspective view of the cam- It should be stated that the screen D is of 2 5 disk hereinafter referred to. a coarse mesh and allows of the passage In the practical construction of my gravelthrough it of the intermediate sizes of gravel, screening apparatus 1 provide a support or which, with the water, are then carried into frame A, which is divided into a series of bins the next trough B, from whence they are disa a (1 which are arranged to receive the difcharged against a screen D, which separates 8o 30 ferent grades of gravel in the manner prestheintermediate-sized particles from the finer ently described, each of such bins being progravel and discharges it into the bin at. The vided with a discharge-opening and cut-01f finer particlesandwaterthen enterthe trough slide a whereby the contents of each bin B from which they are discharged against a may be readily discharged into a car. as shown third but very fine screen D which separates 8 5 35 in Fig. l of the drawings. It will also be nothe finer gravel and sand particles from the ticed by reference to the drawings that the water, which particles fall into the bin a tops of the several bins are stepped, and such The water then passes into a trough or chute bins are of different sizes, the rear one a be- E, Which discharges it onto a water-wheel F, ing arranged to receive the coarser gravel, the a deflector-plate Gbeing provided to cause the 4o center one a the intermediate size of gravel, water to fall onto the wheel F in an effective and the front one a the finer particles of manner. gravel, the purpose of stepping the upper By arranging the screening devices as deportions of the bins being to accommodate scribed the separated gravel will drop into the several screening devices, the constructhe bins through the openings b and to pre- 9 5 45 tion and arrangement of which forms the esvent clogging at these points I hinge the sential part of this invention. screens, as showmand connect the upper ends 13 B B indicate the screeningtroughs, one thereof with a shaker-bar 11, held to be 1011- of which is shown in detail in Fig. 3, each of gitudinally reciprocated in guides h h on the which consists of a rectangular frame, havframe. The lower end of the bar His con :00 5o ing a closed bottom I), a closed forward end nected with the long arm of a rocking lever I, b, and an open rear end the bottom Z1 endpivoted to the main frame at z', the short arm of which leverhas amember which engages a cam-disk J on the shaft f of the wheel F. By this construction it will be observed that as the wheel F is operated by the waste water reciprocating motion is imparted to the bar H. and the screens D D D constantly agitated, and to provide for sudden jars to such screens I employ a spiral spring K, which serves to quickly retract the bar H after ithas been drawn out and the memberi passes the vertical sections of the cam-grooves. V

lNhile I prefer to employ the waste water as a motive power for agitating the screws, I do not desire to limit myself thereto, as other means might be readily employed for reciprocating the bar H.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

1. A gravel-screening machine comprising a main frame formed with a series of bins, a series ofreceiving-troughs mounted over such bins and arranged step by step, each trough having a closed receiving and an open discharge end, the discharge end of one trough being disposed over the receiving end of the next succeeding one, and a series of screens of diiferent mesh interposed between the meetingends of the several troughs and arranged substantially as shown and described, whereby to successively separate the larger particles of gravel from the water and to deflect them to discharge into their respective receiving-bins, as and for the purpose stated.

2. The combination, with the main frame formed with a series of bins a a a of the troughs B B B 13 having open discharge ends, the screens D D D held to vibrate in front of such discharge ends and to separate the different grades of gravel, the waterwheel, and devices intermediate of said wheel and the screens whereby the screens are vibrated as the wheel operates, substantially B the screens D D D hinged at the forward ends thereof, as shown, and the water-wheel F, of the reciprocating rod H, connected with the screens D D D the pivoted lover I, and the cam J, operated by the water-wheel, all arranged as and for the purpose described.

5. In a gravel-screening machine,a screening and separating device consisting of two or more troughs having an open end an d a screen on one of said troughs extending over the open end of the other trough and arranged to receive the material therefrom, said troughs having converging ends formed with an Opening b in their base, all arranged as and for the purpose described. I

FRANKLIN T. GILBERT.

Vitnesses:

M. W. LovEJoY, Z. 13. RAWsON.

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