US1312658A - Milton f - Google Patents

Description

M. F. WILLIAMS. COMBINED DISINTEGRATING AND SEPARATING DEVICE. APPLICATION FILED FEB. 23. 1918.

1 ,3 1 2, 6 5 8. Patented Aug. 12 1919.

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. shown bifurcated pipes D D, andreturn air MILTON F. WILLIAMS, or s'r. LoUIs, MISSOURI.

COMBINED DISINT'EGRATING AND SEPARATING DEVICE.

Specification of Letters Patent.

Application filed February 23, 1918. Serial No. 218,748.

To all whom it may concern Be it known that I, MILTON F. WIL IAMS, a citizen of the United States, residing at St. Louis, 'State of Missouri, have invented certain new and useful Improvements in- Combined Disintegrating. and Separating Devices, of which the following is a specification.

This invention relates to certain new and useful improvements in combined disintegrating and separating devices for grinders, pulverizers and like disintegrating devices.

The main object of my invention is to of feet a condensation of the mixture of feed material and air, just prior to delivery of the feed to a grinder. To this end my improvements have reference to a vacuum feeder interposed in a pneumatic feeding system just prior to the grinder, and to which the supply is delivered pneumatically and from which the feed is sucked directly to the hopper of the rinder. In the figure of the accompanying d rawing is shown a side view of my improved combined feeding and separating device in connection with a reducing system that is the subject of Letters- Patent No. 1,116,777, dated Nov. 10, 1914., wherein a flywheel fan A draws the ground material from below a inder B and blows it to a separator or co lector O; and have pipe E communicating with said grinder as disclosed in Letters Patent on pneumatic separator 1T0. 1,235,174, dated July 31, 1917; said return air pipe E however, in the present application connects with an air-tight box F, having a door normally sealed. A pipe G, smaller than pipe E, leads upward from said box and turns horizontally to a tangential connection with an expansion or vacuum chamber H, preferably consisting of a drum body with conical top and bottom and constituting a cyclone collector producing more or less of a vacuum and used for a feeder. ;The said bottom is connected by a pipe I having an air tight connection with the hopper of said grinding mill below the same; this forms a suction chute for the feed. Another pipe J leads upward ofi the upper end of the conical top, and then downward to the grinder housing below the mill; this forms a return air pipe that draws more or less of the surplus air from the vortex center of said expansion chamber thus producing a partial vacuum as usual with cyclone collectors while the feed material gravitates spirally under suction through said feed chute to the grinder.

' Since a pneumatic system requires about fifty cubic feet of air per pound of material conveyed, most of this carrying air becomes surplus as soon as the air mixed feed reaches said feeder H, from which the feed can gravitate under suction to the grinder. The pipe J serves as a by-pass for this surplus air, and delivers it under the grinder ready for re-admixture with the freshly ground feed, for conveying it forward in the system as has been done heretofore. A slide valve K in said pipe J allows of varying the pro- Patented Aug. 12, 1919. i

portion of the air taken off by the pipe J,

to the air entering the grinder along with the feed. The feed is admitted laterally to the pipe G by a slant pipe L forming a sharp elbow therewith and'communicating with the bottom of a receiving hopper M, in which the feed material piles up when delivered thereto by a feed chute N pro-- vided with a regulating .valve 0. Air is thus hindered from entering the pipe L while the feed is supplying the hopper. When the feed is cut off by the said valve 0, and the feed that isin the hopper has been drawn in, the hopper may be covered by a board or other temporary :cover until the last of the feed is sucked through the pipe G and vacuum feeder to'the grinder. The suction of said fan produces an upward current in pipe G, from the sealed box F and pipe E, and the feed is conveyed over to the expansion chamber, while metal and other foreign matter drops into said box.

An air pipe P serves to anix part of the return air with the entering feed material below the receiving hopper.

A slip sleeve valve Q over an opening in pipe G above the entrance of feed material, serves to regulate the suction so as not to carry over the light foreign particles with the feed, to the expansion chamber feeder.

I claim:

1. A device of the character described comprising a disintegrator, a vertical pipe having a feed inlet at its side, an expansion chamber located above said disintegrator and feed inlet and in communication with between the same, and a suction device commen to said disintegrator, expansion chamber and vertical pipe, si-ibstantially as described.

A combined disintegrating and metal separating apparatus comprising a disintegrator, a hopper with an inclined discharge pipe, a metal receptacle below said discharge pipe, a substantially vertical pipe leading to said metal receptacle and into Which said hopper discharge pipe leads, a valve in said vertical pipe,,an expansion chamber in communication with and between said vertical pipe and disintegrator, and a suction device common to said vertical pipe, receptacle and (lisintegrator, su-bstanl5 tially as described.

In testimony whereof I have affixed my signature in the presence of two Witnesses.

' MILTON F. \VILLIAMS. lVitnesses:

BESSIE RYAN, \VM. G. VEBER

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