US1124605A - Dust-collector for rock-drills. - Google Patents

Description

E. F. GALLIGAN.

DUST COLLECTOR FOR ROCK DRILLS. 'APPLIOATION FILED SEPT. 16, 1912. RENEWED MAY 7, 1914. 1 1 24:,605

Patented Jan. 12, 1915.

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E. FfGALLIGAN. DUST COLLECTOR FOR ROCK DRILLS. APPLICATION FILED SEPT. 16, 19-12. RENEWED MAY 7, 1914.

j 1,124,605 Patented Jan. 12, 1915.

mw f? HE NORRIS PETERS 60., PHOTO-LITHO.v WASHINGTON, D C.

EMME'I" F. GALLIGAN or man HENRY E. woonwann, or 30E O SPRINGS, COLOBADO, ASSIGNOB OF ONE-EAL? TO NVER, COLORADO, AND ONE-FOURTH T0 WILLIAM H.

GALLIGAN, OF IDAHO SPRINGS, COLORADO.

greases.

Application filed DUST-COLLECTOR FOR ROGK-DRILLS.

Specification of Letters Patent.

1 b all whom it may concern Be it known that I, Einunr F. GALLIGAN,

a citizen of the United States, residing at ldaho Springs, county State of Colorado,

of Clear Creek, and. have invented certain new and useful Improvements in Dust-0ollectors for Rock-Drills;

and I do 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,

reference being had t drawings, and to reference marked thereon,

o the accompanying the letters and figures of which form a ner that a tube or conduit leading from the hoiiising conducts the dust to the bottom of the drift and quietly deposits it.

One object of my invention is to provide a construction in which the housing shall be held against the breast of the rock by spring pressure.

Another object is to provide a guide whi 3h may be readily detache d from the drill steel and to which the bottom of the housing is secured.

Other objects will a ppear hereinafter as illustrated in the acco in which:

Figure 1 is a vertical a drift or tunnel mpanymg drawings,

section taken through showing a rock drill in place and my improved dust collector connected in operative relation therewith. Fig. 2 is a horizontal section taken on the line 2-2, Fig. 5, looking downwardly, the parts being shown on a larger scale than in Fig. 1.

11 3 is a similar s line 8-3, Fig. 5, looki on the same scale as ection taken on the rig downwardly, and Fig. 2. Fig. t 18 a section taken on the line d%, Fig. 5, looking upwardly. Fig.

5 is a sectional view oi the housing with parts of the guide sectioned, the rest of the in elevation, and on th 3 and 4-. Fig. 6 is a device being shown e same scale as Figs. section taken on the Patented Jan. 12, 1915.

September 16, 1912, Serial No. 796,354. Renewed May 7, 1914. Serial No. 837,071.

line 6-6, Fig. 3, showing the guide in section and the drill steel in elevation. Fig. 7 is a section taken on the line 7-7, Fig. 3.

The same reference characters indicate the same parts in all the views.

7 Let the numeral 5 designate a rock drill mounted in a drift 6, the drill being in an upright position. The drill steel 7, as illustrated in the drawing, passes through a housing 8 which is composed of flexible material, preferably canvas, the housing merging into a conduit 9 for carrying the dust to the bottom 1 of the drift or tunnel, where it escapes without raising any dust.

The conduit proper is offset from the housing on one side, as shown at 10, and the housing has an opening at this offset, and the bottom of the housing, at this opening, is clamped between the jaws 12 and 13 of a guide and washer members 14- and 15 which cooperate with flanges 16 and 17 formed on the jaws of the guide, to secure the latter to the housing, the washer plates let and 15 being connected with flanges 16 and 17 by means of screws 18 which are secured by nuts 19. The bottom of the canvas is desig nated by the numeral 20.

The jaws 12 and 13 are provided with cooperating members 21 and 22 which conform to the shape of the drill steel 7 around which they fit closely when the jaws are closed. These jaws are pivoted on the shank member 23 of a screw-eye 24.- which passes through registering openings in extensions 24- and 25 of the said jaws. These extensions are equipped with short pins 26 which enter the opposite extremities of a spiral spring 27 which is normally under tension to open the jaws as soon as the handle mem bers 28 and 29 are released. When the drill is in operation these handle members are locked in position to close the parts 21 and around the drill steel. As illustrated in the drawing, a keeper 80, constituting a sort of hook, pivoted as shown at 31 in one handle member and extending downwardly whereby when thrown into the proper position it holds the two handle members in contact. The extensions 24 and 25 of the jaws of the guide, on the side of the parts 21 and 22 opposite the handle members, are crossed, so that when the handle members are released the action of thespring 27 is to open the handle members and the parts 21 and 22 whereby the drill steel is released. In order to prevent the jaws from inclependent movement in a vertical direction when they are in the closed position, the jaw 13 is provided with a lip 3 overlapping the handle member of the jaw 12 adjacent the parts 21 and 22; while the washer member 15 passes beyond, as shown at 33, the joint 32 between the jaws when the latter are closed. By virtue of this arrangement the lip 3 prevents the jaw 12 from moving upwardly from its companion jaw, while the overlapping part 33 of the washer 15 breaks the joint at this point and thereby assists in preventing leakage of dust.

. Above the guide is located a yoke 3st having arms 35 which extend on opposite sides of the drill steel, the closed extremity 36 of the yoke, which is somewhat elongated for the purpose, extending through an opening 37 in the housing, thus exposing a portion of the yoke when the device is in use. The inner extremities of the yoke arms are bent inwardly toward the drill steel, as shown at 60, and these extremities merge into vertically disposed leaf spring members 38 w ich, when the device is applied and during the operation of the drill, are arranged approximately in parallel relation, the said leaf spring members extending into the drill hole 39. These leaf spring members 38 are relatively strong and have a tendency to separate and normally spring apart from each other when not under restraint, whereby they gradually diverge from each other from their yoke extremities upwardly. In order to insert them in the drill hole after the latter is started, I apply a keeper .10 consisting of an approximately rectangular band having recesses 2 in two opposite sides adapted to receive'the leaf spring members 88 and acting as guides to maintain the keeper in the proper position. This keeper maintains the relatively strong leaf spring members in an approximately parallel position and so confined as to allow their points to be introduced to the drill hole. As the spring members are crowded into the hole, the keeper is moved downwardly thereon and drops to a position in proximity to the yoke, thus allowing the tension or tendency of the members 38 to spring outwardly to act, whereby these members tightly engage the wall of the drill hole on opposite sides and maintain the yoke in place.

A spiral spring 41 surrounds the drill steel and the leaf spring members 38. The outer extremity of this spiral spring, or the extremity lowermost when in use, is connected with the yoke 34 on opposite sides, the lowermost convolution d2 of the spiral spring being coiled around pins 43 applied to the yoke, thus anchoring the lower extremity of the spiral spring. The lower terminal of this spring is fastened, as shown at 44 to prevent any tendency of the spring to uncoil. The upper extremity of this spring is connected with the outer end of the housing, as shown at 45. In ore er to form this connection, the upper extremity of the housing is passed over the uppermost convolution 46 of the spring from the out side and drawn downwardly a short distance as shown at 47. then applied to the part 47 of the housing whereby the latter is clamped between this ring and the convolution 46 of the spring. This spring ring 48 is provided with outwardly extending hooks 49 which overlap and extend downwardly upon the outside of the housing. In this way the housing is securely connected with the outer extrem ity of the spiral spring. The spring ring i8 is divided, as shown at 50, and acts in the well-known manner of a ring of this character. The spring ring, together with the upper extremity of the housing, when extended, is considerably larger than the drill hole, whereby the housing is caused to closely engage the breast of the rock around the drill hole when the device is in use. It will be understood that the crowding of the leaf spring members 38 into the drill hole by upward pressure on the yoke, will compress the spiral spring, whereby the latter is placed under suflicient tension to force the upper extremity of the housing into such proximity to the breast of the rock around the drill hole as to prevent the escape of dust or rock cuttings when the drill is in use.

In order toconnect the drill steel guide composed of the jaws 12 and 13, as heretofore explained, with the a chain 51 or other suitable flexible device is employed. The upper extremity of this chain is provided with a ring 52 through which one convolution of the spring 41 passes, while the lower extremity of the chain is connected, as shown at 53, with the eye 5% of the screw 23. The object of this chain is to overcome the tendency of the lower part of the hood where the jaws are located to work downwardly on the drill steel when the drill is in peration. It will be understood that as the clamping jaws through which the drill steel passes are composed of metal, there is a considerable tendency of the lower part of the hood to work downwardly as the drill steel. is driven upwardly into the rock.

It should also be understood that where a dust collector of this character is employed, an important use of the same is in connection with drills arranged for the forming of up holes, whereby the of inclination is suiiicient to cause the rock outtings to pass out of the hole by gravity. Hence, under such circumstances, the drill A spring ring 48 is spiral spring 41,

lit!

steel when in operation, is always working up through the jaws of the hood and the upward movement, under the influence of the powerful and rapid blows of the hammer of the drill, continues through the jaws, even though the latter are adjusted to cause the bushing to tightly grip the drill steel to form a dust tight joint. Hence, it is found in actual practice that there is no tendency on the part of the hood to which the jaws are attached to move upwardly with the drill steel, the fact being that the opposite result exists, as heretofore explained, and in the absence of a support such as the chain 51 or its equivalent, this downward pull upon the lower part of the canvas would soon result in separating this portion of the canvas to which the jaws are attached, from the upper portion, particularly under the influence of the twisting strain to which the hood is subjected as the result of imparting partial rotations in reverse directions to the drill steel during the drilling operation.

l/Vhen my improved apparatus is applied, as illustrated in Figs. 1 and 5, the bottom of the housing where the drill steel guide is located, is closed so tightly as to prevent the escape of any appreciable amount of dust or rock cuttings. Just above the bottom of the housing, and on one side thereof, a relatively short vertically disposed slit is formed in the housing through which the handle members 28 and 29 of the drill steel guide protrude. The housing adjacent this slit is provided with canvas loops 56 arranged to slip over the handles 28 and 29 of the guide when the latter is in place, thus further aiding in the connection of the guide with the housing and having a tendency to support the guide in the proper position with relation to the other parts of the structure. These loops are secured to the body of the housing by stitching or sewing them thereto as shown at 57, or in any other suitable manner.

In the event that any rock cuttings or pulverulent material shall work into the slight space or clearance 58 between the parts 21 of the aws 12 and 18, this material will have a tendency to work out through openings 59 formed in the parts 21 and 22 intermediate their upper and lower extremities, and thus pass into the housing and thence downwardly through the tube or conduit 9 with the other rock cuttings. This clearance 58, however, is so small that the drill steel may be said to fit closely within the jaws as heretofore explained, still, the guide does not travel with the drill steel as the latter works its way into the rock and consequently there must be a slight clearance in order to allow the drill steel to move longitudinally, independently of the guide. The guide, however, has a limited degree of vibration in a vertical direction, thus reliev ing it from any considerable wear and also from any appreciable friction with the drill steel. The guide, in addition to the functions heretofore ascribed to it, also has a tendency to maintain the lower part of the housing as well as the conduit 9 where 1t merges into the housing, in the expanded position, whereby the rock cuttings pass downwardly through the conduit as they enter the housing, thus preventing any accumulation of debris within the housing which might interfere with the proper operation of the device.

From the foregoing description, the use and operation of my improved dust collec' tor for rock drills will be readily understood.

Assuming that the drill is in place within the drift or tunnel, as illustrated in Fig. 1,

and that the housing is in position and properly connected with the device, as heretofore explained, the drill steel is passed through the guide and upwardly to the breast of the rock. It will be understood that before my improvement is applied, the drill hole must be started sufficiently to permit the entrance of the leaf spring members 38, since this retaining device is of the utmost importance in maintaining the apparatus in proper position. After, however, the drill hole has been started, the leaf spring members 38 are crowded into the entrance of the hole a suflicient distance for the purpose, the spiral spring ll being at the same time compressed and placed under sufiicient tension by the movement of the yoke 3% toward the breast of the rock, to hold the upper extremity of the housing and its connections tightly against the breast of the rock around the drill hole to prevent the escape of rock cuttings as the drilling operation proceeds.

In applying the device to the housing, the same may be introduced from the top. The guide will then assume the lowermost posi tion in the housing with its handle members protruding through the slit 56. The bottom of the housing around the hole therein is then applied to the lower surface of the flanges 16 and 17, which together are heart-shaped in plan view, (see Fig. 3,) after which the washer members 14: and 15 are applied to the housing from below, after which the fastening screws 18 are put in place, thus practically closing the bottom of the housing. Assuming that the loops 56 have been passed over the protruding handle extremities of the jaws 12 and 13, the guide is then in position for use. The connection of the upper extremity of the housing to the spiral spring l1 has already been suiiiciently explained.

The device being ready for use, the drill is started and the rock cuttings, as they fall from the drill hole, pass downwardly and thence through the conduit 9, being discharged from the lower open extremity of the conduit at the bottom of the drift or tunnel, as heretofore explained.

The construction herein disclosed comprising a hood, a spiral spring engaging the hood, and means independent of the drill for supporting the spring and acting through the agency thereof to support the hood in place, the axis of the spring being substantially coincident with the axis of the hood, is broadly claimed in my copending application, Serial No. 772,298, filed June 7, 1918.

Having thus described my invention, What I claim is:

1. The combination of a housing arranged to surround the drill hole, means for expanding the housing where it engages the rock around the drill hole, a yoke having parts resiliently engaging the walls of the drill hole for securing the yoke in place, and a spiral spring interposed between the yoke and the housing-expanding means.

2. The combination of a flexible housing, expanding means applied to the upper tremity of the housing where it surrounds the drill hole, a yoke, arms connected with the yoke and extending therefrom approxi mately at right angles to the plane of the yoke, the said arms being adapted to enter the drill hole to resiliently engage the walls thereof, while the yoke extends beyond the hole, and a spring interposed between the yoke and the housing-expanding means.

The combination or a housing, a yoke having relatively strong leaf spring arms adapted to resiliently engage the walls of the drill hole, the said arms extending at right angles to the plane of the body of the yoke, and a spiral spring interposed between the yoke and the upper extremity of the housing and arranged to be placed under tension as the spring arms are forced into the drill hole by upward pressure on the yoke.

i. The combination of a housing, a yoke having spring arms arranged to enter the drill hole whereby the yoke is retained in a predetermined position with reference to the breast of the rock, and a spiral spring located within the housing and having one extremity connected with the outer extremity of the housing while the opposite extremity engages the yoke.

The combination of a housing, a yoke composed of. a body member, and spring arms extending approximately at right angles to the body member and adapted to resiliently engage the walls of the drill hole, and a spiralspring interposed between the upper extremity of the housing and the yoke.

6. In a dust collector for rock drills, the

combination of a housing, a yoke composed of a body member, and spring arms extending at right angles to the body member and adapted to resiliently engage the walls of the drill hole, 'a spiral spring interposed between the body of the yoke and the outer extremity of the housing, the spring arranged to be placed under tension as the spring arms are crowded into the drill hole by upward pressure on the body of the yoke, a guide applied to the bottom of the housing and arranged to closely surround the drill steel, and a flexible connection between said guide and spiral spring, substantially as described.

7. The combination with a housing, of means for securing the housing against the breast of the rock around the drill hole, the housing having an opening at the bottom and a guide applied to the bottom of the housing and composed of pivoted jaws to which the parts of the housing adjacent the opening are secured, the jaws having an opening through which the drill steel passes, the jaws being crossed at the pivot and having extensions in both directions, a spring interposed between the extensions at one end, and means applied to the opposite extensions for locking the jaws in the closed position against the tension of said spring.

8. The combination of a housing, means for securing the housing against the breast of the rock around the drill steel, said means including a yoke, and leaf spring members adapted to enter the drill hole, the yoke having a part exposed through an opening in the housing, and a guide applied to the bottom of the housing and composed of jaws having an opening through which the drill steel passes, the inner extremities of the jaws having extensions, a spring interposed between said extensions, the jaws being pivoted and crossed at the pivot, the jaws also having handle members exposed through an opening in the housing, and means applied to the handle members for locking the jaws in the closed position and against the tension of the said spring.

9. The combination of a hood having an opening in the bottom to reecive a drill steel, the hood being equipped with jaws located in the said opening and applied to the drill steel to form a dust tight joint, a spiral spring applied to the hood, means connected to the spring for holding the hood in place against the breast of the rock around the drill hole, and a flexible connection between the said aws and the spring to prevent the weight of the aws from injuring the hood.

10. The combination of a hood, a spiral spring applied to the hood, means connected with the spring for holding the hood in place against the breast of the rock around the drill hole, the hood having an opening in the bottom provided with jaws to receive the drill steel, and a flexible connection between. said jaws and the spring for the purpose'set forth.

11. The combination of a hood, a spring applied to the hood, means connected With the spring for holding the hood in place around the drill hole, the hood having an opening in its bottom equipped with jaws pivoted to clamp the drill steel to form a In testimony whereof I afliX my signature in presence of two Witnesses.

EMMET F. GALLIGAN.

Witnesses:

E. J. SLATER, W. H. GALLIGAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents- Washington, D. C.

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