US805089A - Blast-charger. - Google Patents

Description

No. 805,089. 'PATBNTED Nov. 21, 1905.

y E. H. MORRIS.l

y BLAST CHARGBEf APPLIGATION I'ILED JUNE 17, 1905.

UNITED STATES PATENT y OFFICE.

BLAST-CHARGER.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed June 17, 19'05. Serial No. 265,768.

To all wiz/07W it 71100;/ concern:

Be it hnown that I, ERNEST H. NORRIS, a citizen of the United States, residing at Cedar Rapids, in the county of Linn and State of Iowa, have invented certain new and useful Improvements in Blast-Chargers, of which the following is a specification.

This invention :relates to mining, and has for its object to produce a blast-charger which may be conveniently filled with blasting-powder, then pushed into the blast-hole, carrying the charge to the limit of the hole, and finally withdrawn, leaving the charge in a compact mass at the inner end of the hole.

The invention comprises a shell or charger, a plunger adapted to traverse it from end to end, a hinged handle attached to the plunger, and a hinged rod connecting with the chargershell and by means of which it is moved endwise with respect to the plunger.

In the accompanying drawings, Figure l is a side view ofA my improved charger in the act of depositing a charge in a blast-hole. Fig. 2 is a fragmentary side view of the same, extended and in position to fold for convenience in filling the charger. Fig. 3 is a similar view, partly sectional, showing the device in filling position.

In mining it is common to deposit the powder for the blast in the blast-hole by means of a charger, a cylindrical flash or shell to hold powder, and attached to a handle long enough to carry it to the inner end of the hole. It is not new to joint the flash to the handle so that it may be turned to a vertical position and be convenient for the miner to fill; but hitherto, so far as I am aware, no way has been provided for using a jointed plunger in the fiash and means for positively stripping the fiash bach and forth over said plunger, whereby the charge is left compactly heaped at the inner end of the blast-hole. This it is the purpose of this invention to secure and by means which will now be described.

Referring to the drawings, A designates a blast-hole, at the inner end of which it is desired to deposit a charge of powder B. For this purpose a cylindrical receptacle C, which for convenience may be called the flash of the charger, is provided to tahe the charge of powder. This, as well as all other parts of the device that may come'in contact with roch, should be of material that will not strihe a sparh, such as zinc, copper, brass, or the like. In practice this is a tube of zinc, to one open end of which is fitted a ring D, of brass. To

' this ring is attached a jointed rod E, by which the flash may be pushed forward or pulled bach at will.

Inside the tube or fiash is a plunger F, adapted to slide freely therein. In practice this is made of wood, but is rimmed with zinc G to prevent its swelling and stiching in the dampness of a mine. This plunger is secured, as by a screw H, to one end of a short section of handle I, jointed by a hinge J to the long section of handle K. This allows the flash to be turned upright, as shown in Fig. 3, for convenience in filling. The handleiis made of wood; but for some little distance each side of the hinge it is incased in sheet-zinc L to mahe a smooth and uniform cylinder for a sleeve M, which may be slid over the joint when the handle is straightened, and so hold it rigidly in that position. At one side of the handle screw-eyes N are inserted, and these serve as guides for the rod E. When the flash is pushed to the eXtreme outer position, the plunger abuts against the end ring and the joints o f the rod and thehandle are then in line, as shown in Fig. Q, so that the flash may be turned up, as above mentioned.

In the operation of the device the miner turns it to the position shown in Fig. 3 and fills the flash. He then lifts it to the blasthole and inserts the end of it therein. Bringing the handle then to a straightened position, with one hand he grasps both the handle and the adjacent rod and with the other he slips the sleeve over the joint, and thus mah'es the handle rigid. He then pushes the charge bach as far as it will go, and, finally, holding only the handle with one hand, he pulls bach the rod with the other, which strips the flash off the charge, leaving it, still held by the plunger, compactly massed at the inner end of the hole. The last operation is of course to withdraw the charger, when the same is ready for another charge by slipping bach the sleeve.

It will be noted that when in position to push the charge bach into the blast-hole the rod, though jointed, is practically as rigid as the handle, and both being grasped by the hands of the miner the liash cannot slip bach over the plunger until he is ready to do so, as above stated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a blast-charger, the combinationof a powder-holding tube or flash, a jointed rod IOO IIO

attached thereto, a jointed handle, and a plunger attached thereto and adapted to slide in said flask.

2. In a blast-charger, the combination of a powder flask or tube, a plunger to slide therein, a stop to limit the movement thereof, a jointed handle attached thereto, and a jointed rod attached to the ask.

3. In a blast-charger, the combination of a powder-flask, a plunger to slide therein, a jointed handle attached thereto, a jointed rod attached to the flask, guides on the handle for said rod, andY a stop to limit the movement of the plunger and bring the joints of the handle and rod into alinement.

4. In a blast-charger, the combination of a powder-flask, means for moving the same back and forth with respect to an internal plunger, a jointed handle, a plunger attached thereto,

and a sliding sleeve to Slip over the joint and make the handle rigid.

5. In a blast-charger, the herein-described handle, comprising two sections, a connecting-hinge, metal casings adjacent to the hinge, and a metal sleeve to slide on said casings.

6. In a blast-charger, the combination with a suitable powder-flask and handle, of a plunger of wood, somewhat smaller than the inside of the flask, and an external ring for said plunger, formed of metal, substantiallyas and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ERNEST H. NORRIS.

Witnesses:

W. K. TAYLOR, J. M. ST. JOHN.

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