US2044666A - Multiple firing blasting apparatus - Google Patents

Description

June 16, 1936. H. w. BURNEY 044,666

MULTIPLE FIRING BLASTING APPARATUS `Filed April 18, 19:52

"fill I :IFSI: 5^ 559i INVENTOR.

,/zovze ATTORNEY.

Patented June 16, 1936 narran STATES PATENT OFFICE 4 Claims.

This invention has for its object to provide an improved multiple firing blasting apparatus, commonly known as a blasting battery.

So far as the inventor is aware there are no blasting batteries now in use or heretofore patented wherein a multiplicity of explosions may be brought about without resetting lor readjustlngA the Wires for each explosion, and connecting thel wires to the firing battery. That is, the operator must set the wires from the battery to the point of explosion or blasting place, make the discharge, and then reset the wires for another explosion or blast.

In keeping with the foregoing it is the object of this invention to provide a multiple firing blasting battery which can be set and arranged for making one or more blasts at a remote and safe point from the battery, without the necessity of the operator moving from thering controlling point. The apparatus also includes means for firing a series of charges or blasts of explosive material, either one at a time, or all together, and then ring another series oi blasts in the same manner, without any resetting of wires or change of location of the operator.

rThe invention may be readily understood from a perusal of the following detailed description, taken in connection with the accompanying drawing, and wherein:

Figure 1 is a vertical sectional View through the blasting battery, the View being had on the line i-i of Figure 2.

Figure 2 is a View similar to Figure 1, taken on the line 2 2 of Figure 1.

Figure 3 is a sectional detail view of an indicating means to reveal the position of the sliding switch.

Figure 4 is a detail sectional View of the lower end of the plunger rod with its switchiattached thereto.

Figure 5 is a detail View of an outside' switch assembly for completing circuits from terminals.

Figure 6 is a diagrammatic view of the wiring arrangement employed between the battery and blasting point or points when a series of blasts are to be carried out.

Proceeding in accordance with the drawing, the invention embodies the combination of a casing l of wood or other suitable material of nonelectric conductivity to enclose the parts, which has an opening at the top for the insertion of a reciprocatory metal plunger rod 2, with an op- (Cl. 17E-115) the rod the wiping or sliding movement of the switch points makes connection through a battery `and a high tension vibratory coil as the switch points 5 and 6 make contact with the posi,-` tive and negative sides of the electrical circuit. The connection of the switch points 5 and 6 with the electric circuit is brought about through the medium of an insulating panel l of wood or other suitable material fastened tothe top and bottom of the casing as illustrated in Figure 1. Carried in equal spaced relation on the panel 'l are metallic plates 8, separated by insulating members 9, and on each plate is mounted a post l0 with knurled screw cap il. These posts l0 have connection through their several wires l2 to similar posts i3 with knurled caps lli, the posts .i3 being mounted on the outside of the casing and serve to provide terminals for lead wires to the point of blast, such lead Wires being indicated at i6. Carried on the opposite marginal edge of the panel 'l and in the path of the switch blade or point 5 is a metallic strip l'l, and by means of this strip and the plates 8 opposite, the plunger rod with its switch blades completes the electric circuit.

The electric circuit is established by means of a small battery i8 and a high tension vibratory coil i9, the positive side of the battery being connected directly to one end of the primary winding of the coil through the wire 20, thence from the opposite end of the primary winding of the coil through wire 30 to a post 3l fastened to metal strip l'l, and through switch e to plunger rod 2, thence to plunger guide 28, through terminal 29 connected thereto-returning to battery on the wire 26.

The circuits from coil i9 through the shots or charges at blasting points 32, indicated diagrammatically in Figure 6, are established through wire 30 to metal strip ll, thence to switch i by means of the blades 5 and 6 to the plates t, through posts l0 and by wires l2 to posts i3, thence by wires i6 through the charges 32 and returning on wire 25, Figure 6, and also shown in Figure 2. The circuit continues through post 22 and wire 2| to the coil i9, and is thus completed for the iirst series of shots. For the second series of charges, switch 33, Figure 5, is closed, and return is by wire 30, Figure 6, to terminal 2li, Flgures 2 and 5, thence through switch 33 to post 22 and wire 2i to coil i9. For the third series of shots the return is made on wire 35 to terminal '23 and switch 36, when closed, to post 22 and wire 2l to coil i9. The return terminal connections, however, as well as the lead wire terminals I6,

may be multiplied as far as is practical in the production and utilization o1' as large an apparatus or battery as is desired.

On the outside of the casing and secured to the plunger rod 2 is an indicator arm 3l which has associated therewith a scale carrying numerals from 1 to 6 or such series of numbers corresponding with the number of contact points or plates 8 on the panel. This indicator is for the purpose of ascertaining when a circuit is completed by the sliding switch blades as the plunger is moved upwardly or downwardly.

In Figure 6 is shown diagrammatically an electrical circuit illustrating the operation of utilizing the apparatus or battery in ring a multiplicity of charges or shots. In this circuit the lead wires I6 are from terminals I3 on the casing l and are of sufficient length so that the operator can be located at a safe distance from the place of exploding charges. Other wires I6' are spliced or otherwise connected to these lead wires I6, and when the sliding switch 4 on the plunger rod 2 makes contact with the plates 8 and the metallicv strip I1, an explosion occurs at the respective blasting points 32.

From the `foregoing it will also be apparent that the switch blades on the plunger rod complete the electric battery circuit through the coil i9 and also complete the connections of lead wires and return wires with this coil, as the switch completes the circuits with the plates 8 and the strip The operation of the plunger rod, through its switch, connects each lead wire to one end of the primary winding of the coil (in succession as the switch completes the circuits with the plates) and the return wire to the other end of the primary winding of this coil.

It is believed that with the foregoing description and explanation further details will not be necessary for the understanding of the apparatus. Likewise, and as before pointed out, the invention may be modied by increasing the number of terminals, switch contacts, leads, and similar parts necessary to increase the capacity of the ring battery, and similarly other alterations are capable, all of which may be within the scope and meaning of the appended claims.

What is claimed as new is:

l. A multiple firing blasting device, comprising a casing, a longitudinal series of separate terminal contact elements supported within the casing and insulated from each other, a corresponding series of separate circuit-wire-attaching elements mounted on the exterior wall portion'of the casing and insulated from each other, each of said exteriorly mounted attaching elements being respectively connected electrically to a corresponding one of said series of interiorly mounted terminal contact elements, a reciprocatory plunger element slidably supported within the casing in longitudinal and parallel relation cooperatively with said series of terminal contact elements, a complementary, elongated contact elegether and' disconnecting said last mentioned series of wire-attaching elements, at will, an electrical battery and a high tension electrical element Within said casing, one pole of the battery being in electrical circuit connection with one end of the primary winding of said high tension element, said winding end being also in electrical circuit connection with one of said exteriorly mounted second mentioned series of wire-attaching elements, the opposite end of said primary winding being in electrical circuit connection with said interiorly mounted elongated contact' element, and the opposite pole of the battery being in electrical circuit connection with said reciprocatory plunger.

2. 'Ihe device as set forth in claim l, and further including an indicator comprising correlated. indicating points located and marked on the exterior wall portion of the casing and a cooperative pointer element mounted and operably connected to reciprocate in unison with said plunger element.

3. A self-contained, unitary, multiple ring blasting dveice, comprising a portable casing, a cooperative electrical battery and a high tension electrical coil element within said casing, a sequential series of separate contact elements mounted within said casing, in spaced relation to and insulated from each other, an elongated contact element in parallel cooperative relation to said series of separate contact elements, spaced and insulated therefrom, a longitudinally disposed, reciprocatory element having an operating handle exteriorly of the casing, said element extending and working in parallel relation to said series of separate contact elements and said elongated cooperative contact element, switch contact elements on said reciprocatory element, in electrical circuit connection therewith and arranged and adapted to travel in continuous con.- tact with saidelongated contact element and intermittently and sequentially with said series of separate Contact elements, a series of circuitwire-attaching elements mounted exteriorly on said casing, each of said attaching elements being respectively in electrical connection with a corresponding one of said series of separate contact elements, a second series of circuit-wire-attaching elements mounted exteriorly on the casing, switch means for connecting together the attaching elements of said second mentioned series and disconnecting them, at Will, one pole of the contained electrical battery being in circuit connection with one end of the primary winding of the cooperative high tension coil element, and said end of the winding being also in circuit connection with one of the wire-attaching elements of said second mentioned exterior series of said elements, the opposite end of the primary winding being in circuit connection with said elongated interior contact element,` and the opposite pole of the battery being in circuit connection with said reciprocatory element carrying the switch contact elements.

4. The device as set forth in claim 3, and further comprising means on the exterior Wall portion of the casing for indicating the relative working position of said reciprocatory element located contact elements.

HUGH W. BURNEY.

Images