US1039184A - Grate-cleaner. - Google Patents

Description

NITED STATES PATENT OFFICE.

CHARLES F. PIERCE, OF CARTERSVILLE, AND SAMUEL C. BYRD, 0F WEBB CITY,

MISSOURI.

GRATIS-CLEANER.

Specification of Letters Patent.

Patented Sept. 24, 1912.

Application filed December 11, 1911. Serial No. 665,106.

To all whom it may concern Be it known that we, CHARLES F. Pinnen and SAMUEL C. Brno, citizens of the United States, residing at Cartersville and lVebb City, respectively, inthe county of Jasper and State of Missouri, have invented certain new and useful Improvements in Grate Cleaners; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains t make and use the same.

This invention relates to ore separators, and more especially to jiggers employing a piston movement; and the object of the same is to provide means for automatically cleaning the grate in a jigger of this kind.

Broadly speaking this object is accomplished by providing mechanism for rapping or tapping the grate at certain intervals so as to produce a vibration of its parts and dislodge particles therefrom, and specifically the invention consists in the details for carrying this out, all as hereinafter more fully described and claimed and as shown in the drawings wherein Figure 1 is a vertical section of one embodiment of this invention, and Fig. 2 a similar section of the upper portion of the parts shown in Fig. 1 but in different position; 'Fig. 3 is a perspective detail of the knocker shaft employed in this embodiment, and Fig. 4 an enlarged sectional detail of the lower end of one of the knocking or rapping bars.

In the drawings I have conventionally illustrated an ore separator of the jigger type which may be briefly described by means of reference letters as follows: The

main framework F supports a plunger box I5 which communicates through an opening 0 with the water box IV, the latter having inlet I and exhaust E, and at the top of this water box is the tray J for washing or jigging the ores, the same having a slatted bottom forming a grate G, and the material being fed to this tray by means of the trough T or otherwise and taken from it in any suitable manner. Within the plunger box B is mounted. a plunger P which is reciprocated vertically by a rod R connected with an eccentric C on the power shaft S which is journaled in the framework F and rotated by any suitable means. The well known operation of machines of this type is that as the plunger descends the water in the box 1% forced through the opening 0 into the water box 1V and upward through the grate G so that the material within the jigger tray J is agitated and separation of the lighter and heavier particles is produced. I. repeat that the description and illustration of this much of my invention is merely conventional, and is given for purposes of locating and explaining the uses of my improved cleaner. Ileretofore means have been devised for cleaning the grate as by flushing the same with water, raking it at times, etc, but the means that I employ will be described below and indicated on the drawings by reference numerals.

Broadly speaking, I propose to agitate the grate by rapping, tapping, or knocking it at proper moments so as to cause the vibration of its grate bars and to some extent also of its frame in order to dislodge the particles of material therefrom. This I accomplish by mounting on the eccentric a band '15 which drives a rod 10' made in two sections adjustahly connected by a sleeve 13 and a set screw 14, the outer end of said rod having a double angle and a foot 11 which is projected horizontally at each revolution of the eccentric. A knocker shaft 1 is journaled in bearings 2' in the framework F and carries an arm 17' from which projects a lug 16' which in turn carries a set screw 12. Said shaft also carries one or more arms 3" from whose outer extremities hang rods 8 which are to knock or rap the grate G. It may be advisable in this construction to pass the lower ends of said rods 8 into sockets shown in Fig. 4: as short upright pieces of tubing 7 whose lower ends engage pins 4 rising from plates 5 which are riveted upon the slats 5 of the grate above described. In the action of this embodiment of my invention, each revolution of the eccentric projects the bar or rod 10 outward so that its foot 11 engages the arm 17 and rocks the shaft 1' from the position shown in Fig. 1 to thatshown in Fig. 2; this raises the arm or arms 3 which therefore lift the various rods 8', and when the foot 11 slides off the outer end of the arm 17 the rods quickly descend by gravity and rap or knock upon the upper extremities of the pins 4;" and thereby agitate the grate in the manner above set forth. The length of the rod or bar 10 may be adjusted by means of the sleeve 13 and set screw 14 as will be clear, and the set screw 12 in the lug 16 of the arm 17 may adjust the height at which the angle or extremity of the foot 11 engages the upper end of the arm 17. By these two adjustments the degree to which the several rods 8 are raised, the extent of the distance through which they are permitted to drop, and the times at which they do drop may all be regulated to suit the varying conditions of the machine.

What is claimed as new is:

1. In an agitating device of the class described, the combination with the grate, and a rod for rapping upon the same when it descends; of a rock shaft having a laterally projecting arm in which said rod is hung and an upwardly projecting arm provided With a lug, a set screw passing upward through said lug, a bar having a double angle in its body resting on said set screw and. a foot passing over the upper end of this arm and projected across the latter, and means for reciprocating said bar, for the purpose set forth.

2. In an ore separator the combination with the grate; of agitating mechanism therefor including an oscillatory shaft journaled in the framework of the separator, an arm projecting from said shaft, a ro depending from the outerend of said arm, a guide rising from the grate and loosely inclosing the lower end of said rod, and means for intermittently turning the shaft to raise said arm and then releasing it so as to permit the rod to rap upon the grate at each descent of said arm.

3. In an ore separator of the jigger type, the combination with the grate; of agitating mechanism therefor including an oscillatory shaft, an arm projecting from said shaft, a

rod depending from the outerend of said arm, a plate riveted upon the grate and having a threaded pin rising from it, and a piece of tubing screwed upon said pin and loosely receiving the lower end of said rod whereby the latter raps upon the pin at each descent of the arm.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

CHARLES F. PIERCE. SAMUEL C. BYRD.

Vitnesses BEULAH SCHOENHERR, J EFF BLACK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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