US1327926A - Air collecting and delivering apparatus - Google Patents

Description

W. D. SCOTT.

1,327,92 Patented Jam-13,1920.

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APPLICATION FILED JAN. 9. I919.

Patented Jan. 13, 1920.

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Specification of letters'l'atent. I PatentedJ till-13, 1920.

Application filed January 9, 1919. Serial No; 270,274.

To all whom it may concern:

' Beit known that I, WILLIAM D. Sco'r'r,a citizen of the United States of America, and

resident of Martins Ferry, county of Belmont, and vState of Ohio, have invented certain new and useful Improvements in Air Collecting and Delivering Apparatus, of which the following is a specification.

, This invention relates broadly to air propelling' apparatus, and more particularly to a fan or blowerg of that type or class commonly employed for creating a circulation of air in mines.

The primary object the invention is to provide a device, specially adapted, as av ventilating apparatus for the passages of mines and the like, which has a'relatively high degree of eificiency due to structural features thatprovide a maximum air-gathering and delivering capacity with a minimum of air resistance and, consequently, with a minimum of driving power required in its operation.

In describing the invention in detail, reference is herein had-to the accompanying drawings, in which is approximately or cylindrical form and 'tion Figure 1 .is a view ,of the inv'ention partly mside elevation and partly in broken sec- Fig. 2' is Y Fi 3 is'a vertical section of the casing,

showmg. the rotor in front elevation'with its front auxiliary blades removed;

the ado-carrying hub showing in side elevation a fan blade mounted thereon:

Fig. 5 is a' front elevation of the hub carrred' by the rotor shaft, showing the oblique I 0' dlsposit'ion of. a blade with respect thereto;

and-

Fig. 6 is an enlarged-section of a modifiedform of blade. A

Referringto said drawings, in which like designating characters distinguish like parts throughout the several views A indicates generally a rotor casing which comprises vertically dis osed end walls 1 and an arc-shapedinclosmg' wall 2 whlch is supported by said end walls and which extends from the rear end of, aiflat baseB to a perspective view ofthe rotor;

. Fig. 4 is an enlarged perspective view of 1 a point 4 located a suitable distance above the horizontal axial plane ofthe casing.

From the terminal point indicated to .the

front end of said base'3 jthe casing-is open providing in the front part of said casing a discharge opening 5 through which air col:

.lected within the casing A'is discharged, as

will hereinafter be described.

Located within said casing is a V rotor,

generally designated by, the letter B, the

shaftfi of which is mounted in suitable bearings, as 7, carried by supports 8 disposed outside the casing at opposite sides 'Said rotor has an eccentric disposition with respect to the casing, being so located that the capacity of the space between the periphery of the rotor and the wall 2 and base 3 of the casing graduallyincreases from the front terminal point 4' of said wall to the discharge 0pening 5. Locatedin'the opposite 'endwallsl of said casing are circular 'air intakeopenings 9 which'have a concentric disposition with respect to 'saldrotor, ,said openings being of less diameter. than that'of said rotor. I

The rotor comprises the shaft 6 wh ch has mounted thereon at a point-midway between" theend-walls 1.of the casing a plain circular 4 plate 10. Rigidly mounted on said shaft at opposite sides of, and at a spaced distance 'from, said plate 10 are two hubs 11 each of Whichcarries a plurality of spaced'rad1ally. vdisposed arms 12. M Rig-idly attached to each of said radial arms 12 is the middle'portion of a fan orpropeller blade '13 which is of approximately semi-circular form.

Said,"

blade is mounted withits curved ed e outer- I most and with its straight chord- 1ke' edge adjacent to the hub 11. Each of said blades are rigidly attached to the inner face-of a circular ring-.like'plate .14 which hasap-' proximately the same external diameter as" i the plate lb'andwhich has a concentric arrangement with to said plate the 'shaft 6. Said 1411.16

100- and 1 crosses the shaft'G in a diagonal direction, as shown mostclearly in' Fig. 3, and has one end thereof rigidly attached to the arhacentv face of the plate 10. at a suitable distance inward from the periphery of the latter.

, ts The opposite endsof each' set of the blades closely adjacent to the end walls 1 of the casing, and the internal diameters of said rings approximate the diameters of theintake openings 9 in said end-walls. openings in said rings register with said openings 9 so that said rings offer negligible obstruction to the entrance of air through said intake openings. 4 V

Interposed between each ofthe rings '14 and the adjacent face of the plate 10 near the peripheral edges thereof is a plurality of transverse horizontal auxiliary blades 15,

:as is clearly shown-.in- Fig. 2. Said auxiliarv blades have a substantially radial disposition, but preferably have their inner edges inclined slightly in a forward direction, as is best show-n in Fig. 1, to accelerate somewhat the delivery of air in a manner which will hereinafter be described.

. While the ends of the blades 13 may be attached to the plate, 10 and rings 14 in any suitable manner, it is preferred that each bladehaveits opposite ends bent to such an angle that, it 1s disposed in a plane at a right angle to the shaft 6, as shown'at 16 in Figs. 3. and 4. The opposite angularly disposed ends are then respectively secured to the plate 10 and adjacentring 1 L by-means of bolts or rivets 17.

It will be observed that the rotor is divlded by the plate 10 into two similar sides in which the blades are reversely inclined so that when it is rotated forward an equal suction is created at opposite sides for drawmg air into the casing through the intake openings 9. Thus, the device has a capacity equal to that of-two separate fans each hav- 1 ing the capacity of one side, and possesses the obvlous advantage that the stresses imposed upon the twoopposite sides are e ualized, one side balancing the other. results in a smoothly and freely running structure which, in practice, possesses a maximum of efliciency with a minimum expenditure of driving power.

In the modification illustrated inFig. 6, the lower or straight edge of the blade 13 is turned outwardat a suitable angle so that a flange 18 inclined toward the adjacent end wall 1 of the casing is provided, such flange being designed to increase somewhat the airgathering capacity of the blade. .In like manner the curved or peripheral edgeof the blade may be turned inward at a slight angle,.as shown at 19 in Fig. 6, to slightly increase the capacity of the blades for impelling collected air.

In. practice, the rapidly rotating blades- 13 at opposite sides .of the division plate 10 produce a powerful suction for drawing air through the .opposite intake openings 9 of thecasm-g, whence they impel the indrawn" air forward and direct it outward with The great force through the discharge opening 1. Anair collectlng and delivering apparatus comprising a casing having an airintake opening in each of its opposite sides and a discharge opening in the front wall thereof, and a rotor mounted within said casing, said rotor comprising a shaft, a pair offans mounted on sa1d shaft, each fan consisting of a plurality of approximately semicircular blades disposed in upright radial positions with their chord-like edges diagonally crossing said shaft, a 'disk like wall interposed between said fans and having the inner ends of said fan blades attached thereto, the blades of the opposite fans being reversely arranged so that each fan acts to draw air inward through the adjacent intake opening, a ring connecting the extreme outer ends-of the blades of each fan, and transverse auxiliary blades interposed between each ring and the adjacent side of said disklike wall.

2. An air collecting and delivering apparatus comprising a casing having an anintake opening in each of its opposite sides and a discharge opening in the front wall thereof, and 'a rotor mounted within said casing, said rotor comprising a shaft, apair of fans-mounted on said shaft, each fan cons'isting of a plurality of approximately semi-circular blades disposed in upright radial position with respect to said shaft and having theirchord-like edges diagonally crossing said shaft and extending approximately equal distances on each side thereof, a wall carried by said shaft between said fans and having the inner ends of. said'fan blades attached thereto, and a plate-like ring connecting'the outer ends of the blades of each fan, the openings'through said rin s being in register with the'ad a'cent mtaiie openings.

3. An air collecting and delivering apparatus comprising a casing having an airintake opening in each of its opposite sides and a discharge opening in the front wall thereof, and a rotor mounted within said casing, said rotor comprising a shaft, a pair of fans mounted on said shaft, eac'h fan consisting of a plurality. of blades ofapproxi- -mate ly semi-circular form disposed in positions with their chord-like edges diagonally arraiige'd so each fan acts to draw air crossing said shaft, each blade having an inward through theadjacent intake opening. 10 I outwardly inclined flange on its chord-like In testimon whereof, I aflix my signature edge and an inwardly inclined flange on its in presence 0t two subscribin witnesses. curved edge, and a disk-like wall interposed -WILLIAM SCOTT. between said fans and having the inner ends Witnesses: I of said fan blades attached thereto, the L. BjWoon, blades of the opposite fans being reversely H. E. DUNLAP.

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