US1491661A - Charge-tamping device - Google Patents

Description

April 22 1924 I 1,491,661

V. BAYAT CHARGE TAMPING DEVICE Filed Jan. 25. 1924 INVENTOR.

BY v j? ,6, ATTORNEY.

35 ferent diameter, to compensate for the vary- Patented Apr. .22, 1924.

UNITED STATES PATENT OFFICE.

VIDO BAYA'I, STEWARTSVILL-E, OHIO.

CHARGE-TAMPING DEVICE.

Application filed J'anuary25, 1924. Serial No. 688,518.

T 0 all whom it may concern:

Be it known that I, VIDO BAYAT, a citizen of the United States, residing at Stewartsville, in the county of Belmont and State of Ohio, have invented certain new and useful Improvements in Charge-Tamping Devices, of which the following is a specification.

This invention relates to charge tamping the force of the explosion from leaking out of the hole to weaken the force of the blast, and further having means whereby a firing squib may be passed therethrough for firing the charge.

A further object of the invention is the provision, in a manner as hereinafter set forth, of a powder tamping device having means associated therewith whereby the de vice may be locked in the blast hole to prevent the force of the explosion from blowing the tamper out of the hole.

A still further object of this invention is the provision, in a manner as hereinafter set forth, of a powder tamping device having a plurality of renewable heads of difing diameters of holes formed by bits of different sizes.

The final object is the provision, in a manner as hereinafter set forth, of a powder 'tamping device which will be strong and sturdy, light, not, cumbersome, of simple construction, and inexpensive to manufacture.

The invention will be best understood from a consideration of the following detail description taken in connection with the accompanying drawings formingpart of this specification, with the understanding that the invention is not confined to any strict conformity with the showing of the drawings,'but may be changed and modified so long as such changes andmodifications mark no material departure from the salient features of the invention as expressed in the appended claims.

of powder, indicated at In the drawings: a Figure 1 is a side elevation of the device embodying this invention, shown as in use,

parts thereof being broken awayto show certain details of construction.

Fig. 2 is a section of the same taken on the line 2+2 of Figure'lQ F igure3' is a detail perspective View of the locking device for securing the instrument in position, and,

Figure 4: is a side elevation of a cleaning rod used to clean out the bore of the tube after firing the charge.

Referring now to the drawings in detail, wherein like numerals of reference indicate corresponding parts throughout theseveral.

views of the drawings, numeral 1 indicates a section through a body of material which is being mined, material such as coal and in which this device was primarily constructed and used. It is well known that in mining coal, the, miner bores with a b'it a series of holes into the body of the coal, one of which is indicated'at 2 in the drawings, and after forming these holes, a charge 3, is] inserted into the hole or holes, and a squib connected therewith and the charge exploded to break up the body of the coal inv the vicinity. Unless the body charge of powder 3- is properly compressed and the hole 2 properly closed the force of the ex plosion wi l be greatly "lessened, because of the fact that a good deal of the power will be lost by the explosion blowing out of the hole and it-is theobject of this invention to provide a means whereby the powder may be well packed in the hole and also to provide means whereby the squib may be held in contact with the powder and further provide means for closing the hole to prevent loss of any of the power of the expolsion.

The device embodying this invention is indicated as being constructed of a steel bar indicated at, 4, thisbar being of substantial length, and further havingthjrough the longitudin'al center thereof, a bore 5. Each end of this steel ,bar 4: is reduced as at 6 forming on each-end thereof the reduced end 7 of less diameter thanthcmain or body portion of the bar. H a ripherally threaded as shown, and there is screwed thereon a frusto-co'nical head-8 having an interiorly threaded'annular recess in its small end adapted to receive the reduced I end 7 of the steel'b'ar 4: as is clearlyshown in This reduced endis pe- 4 Figure 1. The broad or base endof the cone shaped head, acts as a tamping surface, which when the device is inserted into the holes containing the powder charge presses against and compacts the charge of powder in the rear of the hole. There is also formed through each of these head members a. central longitudinal bore adapted when the head is attached to the bar to aline with the aperture or bore 5 through the bar member. It is preferable that these'heads be formed of a material such as copper, as this metal is much softer than steel and less likely to be shattered by the force of the explosion. However, applicant does not wish to limit himself to the use of copper for the head member, nor to the use of steel for the bar, as other metals may be used with equally good advantage. As is shown in the drawings, the head members on the ends of the bar 4 are of difierent diameters, and the purpose for forming these in this manner is as follows. After several holes have been bored into the coal, the bit used for these holes, due to the excessive hardness of the material through which the bits are forced, is materially reduced in size and therefore after a number of holes have been bored the bit will be worn to such a degree that the large head on one end of the bar will no longer be of use for it could not be forced into the holes of smaller diameter; therefore the smaller head at the other end of the bar is used, and as these heads are removable even this smaller head can be removed and a still smaller head appliedto the bar if this becomes necessary. f

After the charge of powder 3 has been inserted into the hole, the tamping bar is inserted to compress the powder, a squib (not shown) is forced through the bore 5, so that it contacts with the powder charge at the end of the bar.

When the tamping bar has been forced into the hole, the powder compressed and the firing squib inserted, the bar is clamped tightly in position by the use of a Wedge 11. This wedge, as clearly shown in Figure 3, is of tapering semi-circular contour, the inner concave side 12 being of the same curvature as the bar 4 and fits snugly thereagainst. This wedge is slipped over the bar and the small end 13 forced into the hole and driven home. In order'to insure that the wedge will not slip out when the explosion occurs, teeth 14 are formed in the body of the wedge along oneedge thereof as is clearly shown in Figure 3, and these teeth out intothe body of the coal and are so set, due to the fact that they point toward the front, or large end of the wedge, that it is impossible for the wedge to slide out of the hole as the teeth grip the body of the coal and retain it in position.

After the charge has been fired and the tamper recovered it will be found that through the burning of the squib in the tube that a good deal of the bore willbe clogged, therefore there is provided a ramrod 15 of a diameter equal to the diameter of the bore 5 and having one end formed into a handle ring 16 as shown in Figure 4. This ramrod is run through the bore 5 and thoroughly cleans the same of all obstructing matter.

From the foregoing it may be seen that a very improved powder tamper is provided which will thoroughly compress a charge of powder in the hole, and also provide means whereby the squib may be forced through the tube and contact with the charge so that the firing of the charge will be positive and sure, and at the same time tightly closing the hole about the charge of'powder to prevent the escape of any of the force of the explosion.

Having thus described my invention what I claim is:

1. A charge tamper comprising, a metallic bar of substantial length, a tamping head on each end of said bar of greater diameter than said bar, said bar and heads having formed therethrough a central longitudinal bore adapted to receive a squib, and means for securing said bar in a bored hole.

2. A charge tamper comprising, a metallic bar of substantial length, a tamping head on each end of said bar of greater diameter than said bar, said bar and heads having formed therethrough a central longitudinal bore adapted to receive a'squib, and means for securing said' bar in a bored hole, saiu heads being removably secured to said bar.

3. A charge tamper comprising, a metallic bar of substantial length, a tamping head on each end ofsaid bar of' greater diameter than said bar, said bar and heads having formed therethrough a central longitudinal bore adaptedto receive a squib, and means for securing said bar in abored hole, said heads being formed ofa softer metal than saidbar.

4. A charge tamper comprising, a metallicbar-of substantial length, a tamping head oneach end of said bar of greater diameter than said bar, said bar and heads havin formed therethrough a central longitudina bore adapted to receive a squib, and means for securing said bar in a bored hole, said heads being formed of a softer metal than said bar and further being removably secured to the ends of the bar.

-5. A charge tamper comprising, a bar of substantial length and having each end thereof reduced and peripherally screw threaded, a tamping head of grea'ter diameter than said bar threaded on each reduced end thereof, said bar and head having a central longitudinal bore therethrough to receive a squib, and means for securing said tamper in a bored hole.

6. A charge tamper comprising, a bar of substantial length and having each end thereof reduced and peripherally screw threaded, an outwardly flaring tamping head of greater diameter than said bar threaded on each reduced end thereof, said bar and head having a central longitudinal bore therethrough to receive a squib, and means for securing said tamper in a bored hole.

7. A charge tamper comprising, a bar of substantial length and having each end thereof reduced and peripherally screw threaded, a tamping head of greater diameter than said bar threaded on each reduced end thereof, said bar and head having a central longitudinal bore therethrough to receive a squib, and means for securing said tamper in a bored hole, each of said heads being of frusto-conical form and threaded at its small end upon the reduced end of said bar.

8. A charge tamper comprising, a bar of substantial length and having each end thereof reduced and peripherally screw threaded, a tamping head of greater diameter than said bar threaded on each reduced end thereof, said bar and head having a central longitudinal bore therethrough to receive a squib, and a tapering semi-cylindrical wedge member adapted to be wedged between said bar and the material into which the bar is placed to secure the bar in position.

9. A charge tamper comprising, a bar of substantial length and having each end thereof reduced and peripherally screw threaded, a tamping head of greater diameter than said bar threaded on each reduced end thereof, said bar andhead having a central longitudinal bore therethrough to receive a squib, and a tapering semi-cylindrical wedge member adapted to be wedged between said bar and the material into which the bar is placed to secure the bar in position, said wedge member having teeth formed upon its exterior surface to grip the surrounding material to prevent the accldental removal of the bar.

10. A charge tamper comprising, a substantially elongated tubular metallic bar for the extension therethrough of a squib, said bar having a reduced end terminal, a conoidal shaped soft metal head detachably mounted on and projecting from said reduced terminal and provided with an open ing for the passage of the squib, and a semicylindrical peripherally toothed locking element mounted on the outer end portion of the bar.

In testimony whereof, I afiix my signature hereto.

VIDO BAYAT.

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