US2202372A - Dust collector - Google Patents

Description

J. BUTERA DUST COLLECTOR I Filed June 19, 1939 May 28, 1940.

2 Sheets-Sheet 1 ,RUefifor 8, 1940. J. BUTERA 2,202,372

' nusr COLLECTDR Filed June 19, 1959 2 Sheets-Sheet 2 Patented May 28, 1940 'D'Us 'r COLLECTOR "Jo'seph Butera, San Jose, Califq assignor of one- I half to Victor J. Lo Bue and Samuel Di Maria,

" both of San Jose, Calif., jointly Application timers, 1939, Serial No. 279,926

. I I 9 Claims. (01., 51-273) t l iThe presentinvention relates particularly to means for collecting the dust formed in the opera ation of shoe repairingmachinerye -,In repairing shoes it isnowcommon practice to perform many of the required operations in finishing, such as wire-brushing, sanding, polishing, etc'., bymeans of a machine known as a f nishing machine.

' Since a greatdealof entremely fine dustis I an produced in some operations, particularly in the sanding operations, 'manyattemptsf have been.

I made to equip these machineswith devicesxthat would automatically remove the dust: promptly upon production, and at the point of its formation.

I Heretofore such devices. as 'abovereferred to -have,been inefficient, large1y';because soiconstructed and arrangedthat the flowof air. therethrough is unduly impeded. SuchdeViCB's include a blower arranged, to suck; thehair. from the area immediatelysurroundingaesanderor other-tool, and force it intoa canvas bag. While the air does. passoutwardly through the walls of the bag and leave the dustconfined therein, its,

movement is so obstructed that a;pressure is ,built up within-the bag, and. the blowermust operate against this. pressure withinJthe; bag.

fI'heresult is that the greater the pressure builtv in'thedust bag the less effective' is the suction operation, the dust accumulating around the mouth of the suction tube and flying off into the atmosphere where it can be breathed by the operator or where. it can settleuponother portions of the machine or surrounding objects. It is, therefore, one object o f the present in vention to provide a dust collect'orfor shoe repairing machinery' that is so'icon'structed and arranged that it will instantly remove all I of the dust formed by a given tool at the pointfof its formation, and'deposit' it in a given receptacle, discharging the air'back to'th'e atmosphere dust free. It is another objectof the invention to provide means-of the-character indicated that may be readilyadapted for use in connection-with any finishingrmachine of any make, and one that will be economical to manufacture simple in form] and construction, positive .in operation, and

highly efficient in its practicalapplication, ,;,In-thedrawings: I w

; Figure 1 is afront elevationof a portion of .a

shoe repairing finishing machinelembodying'my' invention.

1 ,Figure 2 is a view on lineiz-of 1, 1 1

,.., ,Figure 3 is an enlarged section through.

, or. discharge portion of the blowerand the pipe connection thereto.

the settling box.

Figure 7 is a sectional view on line .1-l .--of Figure 4. Figure 8 is a section on 8--8 of E -.ure 5..

s In the particular embodiment of 'the invention herein-shown and described, I indicateithe .general frame of a finishing machineat I, the'drive shaftbeing indicated at 2 and the tool shaftat 3 with the connecting driving belt atl, and the several grinding, polishing or sanding tools on shaft 3 as at 5. The dust removing tube isshown at 6, with the several hoods l communicating therewith and extending upwardly and overithe no tools 5. Drawing the air from tube 6 is a blower' fan 8 with its dischargeat' 9 and operated by means of a motor'through the mediumof belt I drive I.

' Theforegoing described arrangement, with the, g5 exception'of theprovision of the motor .I l,.illus'- trates in a more-or-less formal manner-,.what

isalready well established practice, and therefore isnot developed in 'detail.

1 In effecting myinvention, I -mount a tubular 80 member I2 on thedischargeoutlet of the blower 8, incorporating a curved wall 13' to direct the dust-laden air'dir'ectly to the pipe I4. The pipe l4 leads upwardly tothe under side of a cylindrical drum I5 with which it com- 35 municates at I6, near one end'thereof. The drum I5 has a long narrow slot 11 formed inthe bottom thereof and'extending longitudinally thereof, communicating with aihopper l8. The hopper ,I8 is formed by side walls 19 under I lying the full length of the slot I1 and mounted on the drum l5 to depend therefrom asshown, thesaid walls converging to discharge into a short vertically disposed tube 20.

At 21 ,is a housing seated on frame and 45" divided intotwo chambers as 22 and 23Icoinmunicating by means of a narrow slot 24. I

The housing 2| is disposed to extendffrom the I front to the rear of the frame 1', its reap-wall forming one side of the slot 24, and the front "wall of chamber 22-being substantially in vjer tical alignment with the front edge of tubetZ ll,

. the tube 20 therefore discharging into the 'fgr' wardportion of the chamber 22v at its top, ,a ndthe slot 24 discharging from the chamber 22 from the bottom rear portion thereof.

Mounted in the chamber 22 is a curved bafile plate or chute extending from the forward upper end of the chamber to the slot 2% as at 25.

At 28 is a shaft extending laterally through the chamber 22 above the slot 2&- and fitted with three vanes as 26a of a length to sweep over the lower end of plate 25. The shaft is rotated in the direction indicated by arrow 21 by means of a belt drive connection 28 to the main drive shaft 2.

That portion ofchamber 22 in the rear of plate 25 as at 28 has an air leak 29 to the atmosphere, the discharge of air at this point being controlled by means of a thumb-screw 3d.

The front of the chamber 23 is closed with a double closure, the inner one of which comprises a door member 3! grooved at 32 to seat, on a tongue 33 and fitting snugly upon all sides except the top Where it is spaced from the top of the chamber as at 33a. On the inner side of the door 3! is mounted a strip of sheet metal and is normally held in a closed position by pins 38a seating in the top edge thereof, the pins being mounted on a'transverse angle-iron 39 which.

seats on the top of the chamber with one flange extending downwardly over the passage 33 over the door 353 and in spaced relation to the door as at 4B. The part 39 is mounted on the upper ends of vertical bars l! which are vertically adjustable in bearings 42.

To clean the chamber the member 39 is raised to release door 36 which will then swing open on hinges 37, and the door part 3i may then be lifted out of place.

When the device is in operation the dust laden air is discharged into drum l5 where the velocity of its flow is very substantially reduced, thereby permitting the dust to settle to the bottom thereof Where it is carried through slot I! to tube 2i) and thence to plate 25. Since these parts have a greater cross-sectional area than the pipe hithe velocity of the air is still comparatively slow, and its turbulence eliminated.

In the chamber 22 most of the dust is deposited on plate 25 down which it slides, beingpushed into the chamber 23 by the rotating vanes 26a. The air is expanded in chamber 22 and consequently its rate of how is so reduced that it flows gently through slot 2d. Its force is still further reduced at this point by permitting some air to pass out through leak 25, this air carrying no perceptible dust because of its location, and because the small amount of air flowing does not create suction. When the air passes into chamber 23 the dust accumulates at the lowest point 33 because there is no turbulence tending to keep it suspended in the air, the air draining out of the chamber by flowing along its ceiling and discharging through the slots or openings above the doors.

It will be noted that the flow of air through the passage 24 is controlled by the three vanes 25a in such a manner that when'they are in the position shown in Figure 5 the flow of air is momentarily arrested and the Whole body loses the velocity imparted by the blower and main-- tained in part up to this point. As the vanes rotate they push the material accumulated on plate 25 through the passage and at the same time permit the air to flow therethrough.

Although a certain specific embodiment of the invention has been herein illustrated and described, it will be understood that various alterations in the details of construction and mode of assembly may be made Without departing from the scope of the invention as indicated in the appended claims.

I claim:

1. In a dust collecting system, the combination of a housing formed to define a pair of chambers, one superimposed upon the'other, a passage connecting the chambers at onev end thereof, a dust passage leading into the upper portion of the first chamber, an inclined plate leading from the upper passage to the first mentioned passage, rotatable means disposed over the first passage in parallel relation therewith, and brushing means mounted on the rotatable means disposed to push material from the plate through the said first passage.

2. In a dust collecting system, the combination of a housing forming .a dust collecting chamber, a second chamber disposed over the first chamber, a passage connecting the two chambers, a passage leading to the top of the second chamber, a bailie plate disposed in the second chamher to guide material entering the top passage to the first passage, and devices rotatively mounted over the first passage and disposed to engage material on the plate and push it into the said first passage.

3. In a dust collecting system, the combination of a chamber having a passage leading into the top portion thereof at one side thereof, a discharge passage'leading from the bottom thereof at the opposite side thereof, a bafiie plate leading from the first passage to discharge into the second passage, a shaftrotatably mounted over the second passage and provided with vanes engageable with the plate and arranged to intermittently open and close said passage and push material from the plate therethrough.

4. In a dust collecting system, the combination of a chamber having a passage leading into the top portion thereof at one side thereof, a discharge passage leading from the bottom and op posite side thereof, a baffle plate leading from the first passage to discharge into the second passage, a shaft rotatably mounted over the second passage and provided with vanes engageable with the plate and arranged to alternately close the passage and then open the same and push material therethrough.

' 5. In a dust collecting system, the combination of a housing forming a dust collecting chamber and having a restricted air outlet formed in the upper portion of one end, a second chamber disposed to overlie the other end of the first chamber, a passage connecting said chambers, a dust conveying passage leading to the top portion of the second chamber, a baffle plate leading from the lastnamed passage to the first named passage, and instrumentalities associated with the first passage disposed to control the flow of air therethrough and to push material from the bafile plate therethrough.

6. The structure set forth in claim 5 wherein thedust collecting chamber is provided with a "door spaced from the top of the chamber to provide a narrow passage therebetween and having an inwardly curved shield mounted on the upper portion of its inner side and spaced from the top of the chamber to form a narrow passage there-' between. r

'7. The structure set forth in claim 5 wherein the dust collecting chamber is provided with a removable door spaced from the top of the chamber to form a narrow passage therebetween, and a hinged door overlying the first door and spaced from the top of the chamber to form a narrow passage therebetween, and fastening means for the hinged door. a 8. In a dust collecting system for shoe repairing machines, the combination with the dust'col lecting tube and blower, of a tube leading from the discharge end of the blower, a horizontally control the flow of air from the first to the second chamber, and means formed in the upper portion of the last chamber to permit continuous flow of air therefrom.

v 9; In a dust collecting system for shoe repairing machines,the combination with the dust collecting-tube and blower, of a tube leading from the discharge end of the blower, a dust settling chamber having open communication with the tube and having a discharge passage formed therein, a hopper encompassing said passage, a

chamber disposed below the hopper and communicating therewith, a chamber disposed below the second, or last mentioned chamber and communicating therewith, means operative to control the fiow of air from the second to the third chamber, and an air discharge passage formed

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