US1332305A

US1332305A - Grizzly for ore separation

Info

Publication number: US1332305A
Application number: US302373A
Authority: US
Inventors: Ross William
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-06-07
Filing date: 1919-06-07
Publication date: 1920-03-02
Anticipated expiration: 1937-03-02
Also published as: FR534909A

Description

vv. Ross.l GRIZZLY FOR ORE SEPARATION.

APPLICATION FILED IUNE 7, i919.

Patented Mar. 2, 1920.

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APPLICATION FILED JUNE 7. I9I9. 1,332,305.

Patented Mar. 2, 1920.

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WILLIAM ROSS, MONTREAL, QUEBEC, CAADA.

GRIZZLY FCR ORE SEPARATQON.

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Specification of Letters Patent.

" Patented Mar. 2, 192e.

Application led June 7, 1919. Serial No. 302,373.

To all whom t may concern:

Be it known that I, WILLIAM Ross, a subject of the King of Great Britain, and resident of the city of Montreal, in the Province of Quebec, Canada, have invented certain new anduseful improvements in Grizzlies for Ore Separation. of which the following is a specification.

This invention vrelates to what are commonly known as grizzlies, that is. coarse screens formed of horizontal bars connected together and traveling in a closed orbit. In using such screens much trouble is caused by pieces becoming wedged between the bars, and by tine material which falls through the upper bars falling on the lower bars and collectiner there. Apparatus to overcome this diifdulty is described and shown in my co-pending application No. 270589 tiled January 10th, 1919, and the object ofthe present invention is to devise apparatus which will possess the advantages of that set forth in the application referred to, which will operate at greater speed, and which may be readily arranged to classify the material into more than two products.

l attain my object by means 'of the constructions hereinafter described and illustrated in the accompanying drawings in which- Figure 1 is a side elevation, partly broken away and partly in section, of a grizzly7 constructed in accordance with the presentinvention; v

Fig. 2 a plan view of the same;

Fig. 3 a side elevation of asimple form of the invention;

Fig. more particularly the nmeans for vertically adjusting the supporting tracks ot one of the sets ot' grizzly bars; I

Fig. 5 a side elevation of part of a grizzly showing a modification of the form of the grizzly bars; and n Fig. 6 a side elevation illustrating more or less diagranunatically an arrangement of grizzly bars for classifying material into more than two products. y ln the drawings like different figures.

Referring particularly to Fig. 3, 1 are the main. grizzly bars suitably carried by disks 2. These disks are also adapted to support a chain 3, to the links of which are secured t L1 a partial cross section show ving numerals of reference indicate corresponding parts in the the intermediate grizzly bars el. In the drawings, the disks are to receive the bars 4, so that the spacing of the main and intermediate bars is always accurately maintained.

rlhe chain 3 is of a length greater than the circumference of the circle intersecting the axes of the main grizzly bars. Consequently, at the under side the intermediate grizzly bars fall away from and hang below the main bars, so that the horizontal spacing between the bars at the under side of the grizzly is twice that at the upper side, thus facilitating the discharge of the tine materials passing through the upper part of the grizzly.

The preferred arrangement is shown in Figs. 1 and Q. lin this form both the main and intermediate grizzly bars are carried by chains, and the chains are supported on two sets of sprocket wheels to cause the bars to move in an elong( ted orbit with its major axis substantially horizontal.

5-.-5 are shafts, each carrying two pairs of

sprocket wheels

6 and 7 On the sprock` .preferably given an undulated or serrated as to cause a vertical vibraupper surface so which is particularly useful tion of the bars,

shown as notched in the screening of wet or sticky material,

which is liable to clog the apparatus. Preferably the tracks which are so undulated are arranged so that they may be brought into or out of action. When such tracks are out of action, the supporting of all the bars at the upper part of the apparat the chains of the bars which are so supported, but these are always amply strong to takethe added load.

lnthe drawings, l show the outer tracks 10 as' vertically adjustable, being' secured to sleeves 12 sliding on vertical rods13 secured to the frame and threaded for engagement by the adjusting nuts l-l. By

us falls on l tive position.

, the bars When it 4is desired to classify into more than two sizes, I adopt the designshown in Fig. 6 in which is shown a third set of grizzly bars l5 carried by sprocket wheels 16 suitably journaled and positioned so that adjacent the receiving end of the grizzly. As the orbit of the bars l5 is considerably shorter than the orbit of the other bars, close spacing is obtained adjacent the feed end of thegrizzly and a wider spacing adjacent the discharge end, while ample increase of spacing between the bars at the under sides of their orbits is obtained.

Two separate discharge hoppers 17 and 18 are in this case required. In the other forms a single discharge spout 19 is provided. `In all forms a feed spout 20 is employed and a tailing spout 2l.

Preferably, the grizzly bars are round as indicated in most of the iigures of the drawings, but :danged constructions such as shown in Fig. 5 may under some circumstances be employed. It will also be understood that more than three grades of product may be obtained by further extending the principle of construction illustrated in Fig. 6.

What I claim as my invention is 1. In a grizzly, the combination of substantially horizontal main grizzly bars adapted to be moved in a closed substantially vertical orbit and intermediate grizzly bars connected independently of the .main bars and also adapted to be moved ina closed substantially vertical orbit larger than the orbit of the main bars, said orbits being substantially co-incident for part at least of their upper sides. i

2. A grizzly constructed substantially as set forth in claim l inv which the intermediate bars are carried b v a'pair of suitably supported chains.

3. A grizzly constructed substantially as set forth in claim v1 in which the main and the intermediate bars are carried by two pairs of separate suitably supported chains.

el. A grizzly constructed substantially as set forth in claim 1 providedv with two spaced axles, two pairs of sprocket wheels on each axle, two pairs of separate chains supported von the sprocket wheels and to which the main and intermediate grizzly bars are respectively connected, and sup- 15 alternate with the

bars

1 and 4` porting means for the ends. of the bars' when the latter are in the lupper parts of their orbits.

5. A grizzly constructed substantially as set forth in claim l provided with two spaced axles, two pairs of sprocket wheels on each axle, two pairs of separate chains supported on the sprocket wheels and 'to which the main and intermediate grizzly bars are respectively connected, and supporting means for the ends of the bars when the latter are in the upper parts of their orbits undulated to cause a vertical vibration of one or both sets of bars.

6. A grizzly constructed substantially as set forth in claim l in which the orbits of the main and intermediate grizzly bars coincide for substantially the full length of their upper sides and whichv isprovided with a third set of grizzly bars movable in a smaller orbit than either the main vor intermediate hars and co-inciding with said o iiits for a portion only of their upper s1 es.

set forth 1n claim 1 provided with two spaced axles, two pairs of sprocket wheels on each axle, two pairs of separate chainsl supported on the sprocketvwheels and to 7. A grizzly constructed substantially as atL which the main and intermediate grizzly f hars are respectively connected, independent supporting means for the ends of the two sets of bars when the latter are in the upper parts of their orbits, the supporting means for one set of bars being undulated to cause a vertical Vibration of one set of bars;-

8. A grizzly constructed substantially as set forth in claim 1 provided with two spaced axles, two 'pairs of sprocket wheels on each axle, two pairs ofseparate chains supported on the sprocket wheels and to which the main and intermediate grizzly bars are respectively connected, independent supporting .means for the ends of the two sets of bars when the latter are in the upper parts of their orbits, the supporting means for one set of bars being Yundulated to cause a vertical vibration of one set of bars, and means for raising and lowering the last mentioned supporting means yto bring them into or out of action.

Signed at Montreal this 26th day of April 1919.

t WILLIAM ROSS. Witnesses:

A. ARMSTRONG, G. B. ANDREWS.