US176757A - Improvement in ventilating apparatus for coal-mines - Google Patents

Description

V r. MURPHY.

VENTILATING APPARATUS FOR COAL-MINES. .menzsv.

Patented May 2, 1876 s E s 3 E N, n W

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mPTEflS, PNOTlJ-LITHOGRAPHER, WASHlNGT ON. D C.

UNITED STATES PATENT FRANCIS MURPHY, or STREATOR, ILLINOIS.

IMPROVEMENT IN VENTILATING APPARATUS FOR COAL-MINES.

f pepification forming part of Letters Patent No. 176,757, dated May 2, 1876; application filed April 10, 1875. l

To all whom it may concern Be it known that I, FRANoIs MURPHY, of Streator, in the county of La Salle and State of Illinois, have invented a new and Improved Ventilating Apparatus for Coal-Mines, 8210., of which the following is a specification:

1n the accompanying drawing, Figure 1 represents a side elevation of my improved ventilating apparatus for coal-mines, 850.; Fig; 2 an end view of the same, and Fig. 3 shows. detail side and .end views of a blade of my spiral fan.

Similar letters of reference indicate corresponding parts. V

The invention will first be fullydescribed in connection with drawing, and then pointed out in the claims.

In the drawing, A represents the base-supporting timbers, which are arranged around the shaft-opening, with the vertical posts or standards B mortised therein. The standards B are stiffened and firmly retained in position by braces a and tie-rods I), attached to swivel-bails dnear the top, and to sockets,

washers, and nuts of the base-pieces. The posts B carry at their upper parts, in suitable bearings, the fanshaft O, which is revolved by pulley-and-belt connection from the engine. A- top cross-piece, B, is securely fastened to the ,top of posts B, and bears, by intermediate wedges, on the top of the air-chamber D, which is thereby rigidly retained in position, its base part being bound to the connectingtube column E by the metallic valve-frame E of the same. The air-chamber D is provided x with circular openings 6 at opposite sides, the

fan-shaft passing centrally through the same, and carrying outside and near each opening a fan, O. The fans 0 are equal in every respect, with the exception that one has right and the other left or contrary-spiraled blades. The fans are keyed firmly to the shaft and balance each other, so as to neutralize the lateral pressure of -one fan, and utilize the power of the fans to a greater extent. The blades or wings of the fans are of wrought iron or steel, and firmly dovetailed to the hub, being made thicker near the hub, and' with' a gradual taper, as shown in Fig. 3. Each blade is curved in the manner shown in Fig. 2, to produce the cutting of the air at a certain angle, and thereby the exhaustion of the shaft by being revolved in one direction, and the forcing in of air by being turned in the opposite direction.

The working capacity of the balanced fans is nearly doubledwithout' enlarging the apparatus, as compared with a single fan, while the safety of the apparatus is increased by the neutralization of the lateral pressure.

The air-chamber or casing is carried over the fan-sh aft by having slots or recesses at the lower side, which are closed 'by dovetailed pieces when the air-chamber is seated on the tube-column.

The downward-descending shaft-tubes E are supported at suitable distances by being provided with inverted brackets f, of the width of the tubes, that are firmly attached to the outer sides of the same, resting on surrounding and bolt-connected cross-pieces g, which are supported by brackets g of the shaft-linings. The different tube-sections are thus separately supported as extended downward into the shaft without producing any .pressure or weight on the lower sections of the column. The setting up, replacing, and detaching of the tube-sections, is thus accomplished in a quick and convenient manner.

When the shaft is sunk to a lower vein or level, having one or more working-veins above, it is necessary to regulate and control the ventilation between them. This is done by means of the valve F, which is shownin Fig.2, above ground, but which should. be apa lever, it, that is connected by a rope and pulley, i, with a sector-shaped pulley, l, on the I valve-shaft lever h, holding the valve F in any position by being fastened by a stop-pin, h,

to a perforated circular guide-piece, W. The sector-shaped pulley l of the valve is acted tube with a mercurial gage, G, that is placed on any suitable standard or point free from the vibrations of the machinery. The gage indicates, on a graduated'scale of the glass tube, the degree of exhaustion produced by the fans. v

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of tube sections having inverted side brackets and surrounding supporting-pieces, with brackets of shaft-lining for hearing the tube-sections separately of each other, as set forth.

2. The combination of the valve F, lever h,

rope and pulley t', sector-pulley 1, spring Z,

and lever-locking plate 1 with the air-tube E of a mine-ventilating apparatus, as and for the purpose set forth.

.3. The combination of' the air-receiving chamber D, provided with openings 6 at opposite sides thereof, and the balanced fans 0, arranged on the same shaft and outside of the air-receiving chamber, all constructed and operating substantially as described.

4. The combination, substantially as flescribed, of the air-receiving chamber D, the balanced fans 0, and the shaft-tubes E, provided with suitable valves F.

, FRANCIS MURPHY.

Witnesses:

WM. S. CHERRY, R. D. FLETCHER.

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