US410515A

US410515A - Revolving coal-screen

Info

Publication number: US410515A
Authority: US
Publication date: 1889-09-03
Anticipated expiration: 1906-09-03

Description

(No Model.)

W. 0. GUNGKEL. REVOLVING GOAL SCREEN.

No. 410,515. Patented Sept. 3, 1889.

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UNITED STATES PATENT OFFICE.

IVINFIELD O. GUNCKEL, OF TERRE I'IAUTE, INDIANA.

REVOLVING COAL-SCREEN.

SPECIFICATION forming part of Letters Patent No. 410,515, dated September 3, 1889. Application filed January 23, 1888. Serial No. 261,657. (No model.)

To all whom it may concern.-

Beit known that I, WINFIELD O. GUNOKEL, a citizen of the United States, residing at Terre Haute, in the county of Vigo and State of Indiana, have invented certain new and useful Improvements in Revolving Coal- Screens; and I do hereby 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 to make and use the same.

This invention relates to coal-screens in which the screen is made revolnble; and it consists in the novel construction and combination of the parts, as hereinafter fully described and claimed, whereby the screen is driven in an improved manner, and is kept free from dirt.

In the drawings, Figure 1 is a side view of the screen, the casingbeing shown in section. Fig. 2 is a front end view, and Fig. 3 is a cross-section taken 011 line 0: 0c in Fig. 1.

A is the casing which incloses the screen and which may be framed together in any convenient manner.

B is the wire cylinder or screen, the Wires of which are spaced farther apart toward the rear of the machine, or otherwise arranged to screen the coal to the best advantage. The screen B is inclined, the rear end being the lower.

0 is a band secured to the screen about the middle of its length and provided with a V-shaped projection c.

D are flat bands secured to the ends of the screen, and E are longitudinal bars uniting the end bands with the middle band, and supporting the wire cylinder which is riveted to them. The middle band C is made rather larger in diameter than the end bands D.

F are two parallel driving-shafts journaled in bearings f, secured to the casing and situated below the screen, and one at each side of it. These shafts F are provided with sprocketwheels G, connected together by the chain 9 and driven from the sprocket-wheel g outside the frame.

H are fiat-faced wheels secured 011 shafts F for the end bands D to bear upon.

I are grooved wheels secured. to the shaft F and engaging with the V-shaped projection on the middle band. As the middle band is larger than the end bands and is situated substantially under the center of gravity *of the screen, the weight of the screen comes upon the said grooved Wheels, and the driving is accomplished by them solely. This construction insures the screen against slip, the grooved wheels receive the end-thrust due to the inclination, and the ends of the screen being subjected to similar strains the screen will last much longer and not get bent out of shape by being twisted in various directions.

J is a brush of steel wire situated inside the screen and arranged to press against the whole or greater part of its surface at an angle of about forty-five degrees. The arrow shows the direction of motion and the screen meets the brush as the cylindrical surface descends. The brush clears the wires from dirt, which falls vertically clear of the brush, as shown in Fig. 3, so that the brush does not become clogged up.

K are levers which support the ends of the brush outside the screen and are pivoted to the casing by the pins 70.

L are levers pivoted to the said levers K and provided with long slots Z in their free ends.

M are thumb-serews which pass through the said slots and connect the levers L with the casing, so that the position of the brush can be varied to make it bear with greater or less pressure against the screen, or to swing out of contact with it altogether.

\Vhat I claim is-- 1. The combination of the cylindrical wire screen, the fiat bands secured to the ends of the screen, the middle driving-band of larger diameter than the end bands, the drivingshafts situated below the screen, one on each side of it, the flat-faced wheels supporting the ends of the screen, and the driving-wheels engaging with the said middle driving-band, substantially as and for the purpose set forth.

2. The combination of the inclined cylindrical Wire screen, the flat bands secured to the ends of the screen, the middle drivingband of larger diameter than the end bands,

and provided with the circumferential V- shaped projection, the longitudinal bars uniting the middle and end bands, the driving-shafts situated below the screen, one on each side of it, the fiat-faced wheels supporting the ends of the screen, and the grooved driving-Wheels engaging with the said proj ection on the middle driving-band, substantially as and for the purpose set forth.

3. The combination of two parallel drivingshafts, three wheels secured upon each shaft,

and a cylindrical screen provided with middle and end bands, supported upon the said Wheels and bearing hardest upon the middle Wheels, whereby the screen is driven from the i 5 middle, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

VVINFIELD O. GUN CKEL.

Witnesses:

ERWIN S. EMRY, O. T. NOBLE.