US1395792A - Conductor for mine explosives - Google Patents

Description

R. L. BOWMAN. CONDUCTOR FOR MINE EXPLOSIVES.

APPLICATION FILED JAN. 19,1921,

Patented Nov. 1, 1921.

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ROBERT LEE BOWMAN, 0E KNOXVILLE, TENNESSEE.

. CONDUCTOR FOR MINE EXPLOSIVES.

Specification of Letters Patent.

Patented Nov. 1, 1921.

Application filed. January 19., 1921. Serial No. 438,417.

To all whom it may concern:

Be it known thatI, ROBERT L.'BowMAN, a citizen of the United States, residing at Knoxville, in the county of Knox and State of Tennessee, have invented a new and useful Conductor for Mine Explosives, of which the followingis a specification.

This invention relates to conductors where by miners are enabled to place charges of explosives into holes drilled therefor without experiencing accidents, the loss of time and material resulting from the usual methods followed.

Heretofore it has been the practice to tear off a required length of paper from a roll and form and fill the same with an explosive, and insert the filled shell into the hole. Very often the shell buckles on account of the roughness or crevices in the strata before it reaches the innermost portion of the hole; and at other times it will bulge open I and cause waste'of the explosive, and great danger in recharging the hole on account of the bit striking sulfur and thereby causing a spark.

It is an object of'the present invention to provide a conductor of a predetermined size in which a shell of the usual or any preferred construction can be placed and conveyed directly to any portion of the hole without danger of buckling and without danger of being misplaced or of losing any of the explosive.

Another object is to provide a device of this character made up of separable sections whereby one part of the conduct'ortcan be opened easily to receive the charge and subsequently closed so as to hold the charge during its insertion into the hole.

Another object'is to provide a conductor a portion of which can be utilized as a spoon should it be desired to place an explosive back in a hole without the use of shell.

Another object is to provide a conductor a portion of which is telescopic and which portion can separately be used as a casing or conductor to place an explosive back in a hole.

A still further object is to provide a conductor which may be used as a'mandrel and which is very simple, durable and compact in construction and which can be easily manipulated.

\Vith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope ofwhat is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings Figure 1 is a plan view of the device.

Fig. 2 is a longitudinal section.

Fig. 3 is a transverse section. I

Fig. 4 is a detail view of a combinedcap and cup;

Referring to the figures by characters of reference 1 designates the main section of the conductor, the same being substantially semicylindrical and hollow. One end of this section is closed as indicated at 2 and extending across the open face of the section at the closed end thereof is a flat wall 3having a slot 4 therein adjacent its free edge. An opening 5 ,is formed in the Wall 2 at the center of the arc defined by the arcuate wall of the section and another opening 6 is formed in said wall as shown. Additional openings 7 and 8 are formed in the wall 2 and in the wall 3, these two openings being designed to receive the offset end 9 of a holding rod or handle 10.

A removable section 11 is mounted on the section 1 and is substantially semicylindrical and hollow. This section has one end closed and adapted to abut against the wall 3 while its other end is open and is designed to lie flush with the open end of the section 1. A. curved tongue 12 is extended fromthe closed end'ofthe section 11- and is insertible into the slot 4 so as to hold the sections 1 and 11 properly assembled at one end. It is possible, however, by swinging the section 11 away from the section 1, to disengage the tongue from the slot. A telescopic tube 13 is slidable on the sections 1 and 11 and is adapted to move forward or backward as desired against a rib or shoulder 14 on the outer faces of the sections adjacent their free ends so as to hold said sections together as shown in the drawings. By slippingthe tube 13 up toward the closed end of the section 1, however, the section 11 is released and can be swung away from section 1 and detached therefrom.

Slidably mounted between the sections 1 and 11 is a plunger or follower 15 having a fuse receiving recess 16 in its periphery. This follower has a stem 17 slidable within the opening 5 and detachably engaged by an extension handle 18. It is to be understood, also, that an extension handle 19 may be connected to the rod 10.

In using this device for the purpose of placing a charged shell or a granular explosive in any portion of a hole, the plunger 15 is moved against the closed end of the sec tions 11, a fuse is placed in the opening 6 and the recess 16, and a wad may be pressed against the plunger 15. The charged shell or explosive is then placed in the conductor and another Wad may be forced into the open end of said conductor. The entire device is then inserted into the hole until it reaches the desired portion thereof, the extension handles 18 and 19 being employed if necessary. The plunger 15 is then held stationary while the operator pulls on the rod 10 so as to cause the conductor sections 1 and 11 to slide off of the charge after which the entire device is withdrawn from the hole and the charge tamped in the usual way. Obviously one or more charges can be placed in the same hole by means of this device and, instead of placing a shell in the conductor the explosive can be positioned therein without the shell. Furthermore by removing the section 11 and the ring 13 the section 1 can be employed as a spoon for placing an explosive back in an opening that has been drilled.

When the conductor is not in use a graduated cup 20 can be employed to close the open end thereof, it fitting over said end like a cap. At other times the cup can be used to measure the explosive placed in the conductor.

It will be noted that the tube 13 is slit longitudinally so as to be rendered resilient and one of the slits, indicated at 21 is provided with notches 22 for receiving .a latch 23 whereby the tube can be drawn longitudinally along the conductor and placed in engagement with a latch at any desired point.

What is claimed is 1. A device of the class described including hingedly connected sections, a follower slidably mounted between the sections, and means extending continuously around the connected sections for holding them against relative movement.

2. A device of the class described including hingedly and detachably connected sections, a follower slidably mounted between the sections, and means extending continuously around the sections for holding them against relative movement.

3. A device of the class described including hingedly and detachably connected sections and a follower slidably mounted between the sections, and handles extending along lines parallel with but spaced from the longitudinal axis of the space between the sections and connected to the follower and to one of the sections respectively.

4. A device of the class described including hingedly and detachably connected sections, a follower slidably mounted between the sections, and a sleeve movably engaging the sections for holding them against relative movement.

5. In a device of the class described the combination with opposed hingedly and detachably connected sections cotiperating to constitute a conductor, and means movably engaging the sections for holding them assembled, of a follower slidable between the sections, a handle slidably mounted in one end of one of the sections and connected to the follower at a point removed from the center of the follower, and a handle detachably connected to one end of one of the sections, both of said handles being parallel with and spaced from the longitudinal axis of the device, the follower handle constituting means for holding said follower against rotation between the sections.

6. A device of the class'described including a hollow section closed at one end and having a slotted flat wall adjacent said end, another hollow section closed at one end and disposed oppositely to the first named section, a tongue extending'therefrom and engaging the slotted wall and constituting a detachable hinged connection between the sections, a ring slidable upon the sections, a follower slidable between the sections, and means for holding the follower against movement during the movement of the sections relative thereto.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of a witness.

ROBERT LEE BOWMAN. P

Witness:

IVY E. SIMPSON.

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