US1169501A - Pulverizing apparatus. - Google Patents

Description

W. K. LIGGETT.

PULVERlZING APPARATUS.

APPLICATION FILED APR. 9, 190B. RENEWED JUNE 17. 1915.

1,169,501 Patented Jan. 25, 1916.

Suva M 501,

wil'n @ooeo attorney To all whom it may concern:

. ran snares-Parana osrion WILLIAM E. LIGGETT, or COLUMBUS, OHIO, Assienofa 'ro THE JEFFREY MANUFAC- TUBING COMPANY, A CORPORATION. or OHIO. I

PULVERIZING APPARATUS.

Specification of Letters Patent.

- Patented Jan. 25, 1916.

Original application filed February 18, 1907, Serial No. 357,914. Divided and. this application filed April 9, 1908, Serial No. 425,150. Renewed June 17, 191 5. Serial No. 34,738

' Be it known that I, WIILIAM; K. Liocn'rr, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain hewand useful. Improvements in Pulvcrizing- Apl paratu's, of" which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to pulverizers, and has for its objects, first, to provide an improved hammer mechanism, and, secondly, to so construct the rotatingparts that they act as a fan blower as well as to crush and pulverize the material.

. This application is a division of my ap- I plication, Sr. No. 357,914, filed Feb. 18, 1907.

In the drawings Figure 1 is a longitudi- 'nal section of an apparatus embodying my invention. Fig. 2 is a top plan view of the 7 same, Fig. 3iis a vertical transverse sectional view looking toward the feed hopper.

In the drawings, the shaft 1 is shown mounted'in the bearings 2-2 and Provided with a pulley 3 which is adapted to be belted to. any suitable source of power. The bearings 2 are carried by the base 4 which likewise supports the casing 5. This casing is constructed in the usual manner and is provided with the grinding plates 27 made of' material suitable for the purpose of coacting 'with the hammers to grind the rock,

1 coal, ore or other material.

Material is fed into the casing from the feed plate 8 which is arranged below the opening 6 in the feed hopper 7. The feed plate is reciprocated on a track way by any suitable means, that shown comprising the' pitman 9, crank 10, shaft 11 on which the cranlbis mounted, the latter receiving its motion through suitable gearing 12-13, and the power shaft 14, whicliis operatively connected to the shaft 1.

I have shown this pulverizeras connected to air inlet and outlet pipes which are de- -signed to lead to and from collecting and scribed and shown in the drawings are equally applicable to machines in wh ch .ing chamber through the material is removed from the pulverizgrate bars or in any other manner.

By means of the feeding mechanismabove described, a comparatively air-tight inlet opening is, provided for the material, Air is drawn in through the central lateral openings in the casing 15-. 15, the latterbeing connected to any desired source of air supply by means of the pipes 16-16 or to the collecting and separating devices to receive insufliciently pulverized material and return it to the pulverizer. The discharge opening .17 is preferably located atv the top of the mately of the same width as the pulverizing chamber, but the discharge duct 18 widens rapidly above this opening in longitudinal planes, as shown in Fig. 3, to form the enlarged chamber 19. In this chamber are mounted bafile plates 20 which serve to prevent the discharge of undesirably large pieces of material and to return them to'the pulverizing chamber to be more finely divided. Upon the shaft 1 are mounted in closeproximity to each other the annular disks 2121 having the annular part 22' and the spokes 23. A chamber or passageway 26 is formed between the annular. parts 22 and the spokes 23 of the disks. This chamber is concentric with the axis and serves as a passageway for air as' well as for material suspended in the air. Between these disksnare mounted hammers 24-24 which are pivotally carried by the rods 25, the latter being supported in the annular portions of the disks. These hammers are flat, metahbars, which between their ends are given a twist through an angle of between 45 and degrees. The bars are of such a width and are mounted at such a distance apart that when given this twist the blade portions overlap each other. By constructing and mounting the hammers in this centrifugal fans, and draw air in through the lateral openings 15, 15, into the drumlike chamber 26 and radially outward against the peripheral walls of the casing. By giving the ends of the blades a twist through an angle of approximately 45 degrees, or such an angle that the blades are and rubbed in directions both transverse of vthe machine and circumferentially. The

overlapping of the blades also prevents any part of the material from passing between the hammers unground and facilitates the reduction of the material.

What I, claim is:

1. In apulverizing apparatus, the combi nation. of a casing havlng a grinding s ure face, a rotary horizontal shaft mounted in the casing, a hammer-carrying mechanism -mounted on the shaft and formed with a chamber 26. concentric with the axis and open at both'ends, the chamber having radial openings at intervals throughout its length, a series of hammers "mounted on the hammer-carrying mechanism, and adapted to cooperate with the said grinding surface,v

means in the planes of rotation of the hammers'for supplying to the casing material to be pulverized, and means for feeding material to the said chamber 26 at both ends thereof,. the material fed to the chamber" passing out through the radial openings to be acted upon by the hammers.

2.' In a pulverizing apparatus, the combi-' nation of a casing, a rotating pulverizing element mounted therein, arranged to act also as a fan, a duct through which the material is carried along with the air currents produced by said rotating element, the duct and a deflector 2O situated in the duct directly above and opposite the opening into the casing and concaved downward to arrest the larger particlesof material carried out of the casing and ,to return them thereto through the said duct, substantially as set forth.

two witnesses. WILLIAM K. LIGGET'I. Witnesses:

H. B. ALEXANDER, BEN GRAY.

In testimony whereof I affix my signature,

in presence of expanding immediately above the casing,-

Images