US378371A - Edwaed c - Google Patents

Description

(No Model.)

E. O. LOPTUS ORE FEEDER.

No. 378,871. Patented Feb. 21, 1888.

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UNTTED STATES PATENT EDWABD C. LOFTUS, OF OAKLAND, CALIFORNIA.

ORE-FEEDER.

SPECIFICATION forming-part of Letters Patent No. 378,371, dated February 21, 1888. Application filed January 26, 1887. Serial No. 225.560. (No model.)

To all whom it may concern:

Be it known that I, EDWARD C. LoF'rUs, a citizen of the United States, residing at Oakland, Alameda county,and State of California, have invented new and useful Improvements in Ore-Feeders, of which the following is a specification.

liIyinve-ntion relates to that class of machinery used to supply ore to be ground to mills used for that purposeas pulverizers or the ordinary stamp-battcry-the object being to produce a feeder with few working or wearing parts, easy to remove and inexpensive to renew, yet positive in its action and capable of feeding wet and muddy ores, and even mud alone, if desired.

My invention is illustrated in the accompanying drawings, in which- Figure 1 is a frontelevation of the feeder. Fi g. 2 is a central vertical section of the same, showing means for operating the plunger by the tappet of a stamp-stein. Fig. 3 is a horizontal section of the same on the line A B, Figs. 1 and 2, showing theinterior of the feeder and as operated by a crank-shaft; and Fig. 4 is a detail view of an adjustable crank and connecting-rod.

The same letters refer to similar parts throughout the several views. I

A A constitute the frame-\vork,of wood; B, the sheet-iron hopper in which the broken ore is deposited. Beneath this hopper is the feeder proper, C, which consists of a box-like receptacle supported by the frame A. On the side next the pulverizcr or stamp-battery is the swinging door 1), and on the opposite side is the plunger,pivoted at its centerF and adapted to be driven by the pulley G, crank H,and stud I. The outside of the plunger at J is curved in the arc of a circle struck from the pivot F as a center and fits snuglyin the correspondingly-shaped cheek-pieces K, so as not to allow any of thematerial to work in between. The

plunger is shaped on its inner face in the form of two large curves, E L, which prevent the 5 ore from working from side to side and compel it to move forward as the plunger is oscillated and to pass under the door D onto the apron M, and thence into the mill or stampbattery. I

It will readily be seen that it matters not what the nature of the ore may be -it must be forced forward toward the apron, this being the line of least resistance.

The shaft 0 is secured to the frame at P in ordinary bearings and held in place by the setcollar R is a hand-nut, which holds the crank-pin in the slot of the pulley to regulate the stroke of the plunger. S are bolt-holes to hold the top plate to the bottom, they passso ing through the cheek-plates,and are shown in Fig. 1.

In Fig. 2 is shown another means ofoscillating the plunger,consisting of the Tshaped lever T, having the arms U V X and pivoted to 65 the frame A. The arm U has a forked lower end which straddles a stud similar to the stud I, but on the opposite side of the plunger. As the arm V is struck by the tappet on the stamp-stems sudden oscillating motion is im- 70 parted to the plunger, and as the stamp is lifted the spring WV, acting on the arm X, restores the lever and plunger to their former position.

Having illustrated and described myiuven- 7 5 tion, what I claim as new, and desire to secure by Letters Patent of the United States, is-- In an ore-feeder,the combination of the hopper, the feed-chamber, the oscillating double curved faced plunger, the central vertical 8o pivot, and means for oscillating the plunger, substantially as herein set forth.

EDWARD O. LOFIUS.

W'itnesses:

LOUIS P. WARDLE, F. P. LANGAN.

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