US2813669A - Detonator pouch - Google Patents

Description

Nov; 19, 1957 L. P; FRIEDER E1; AL 2,813,669

DETONATOR POUCH 2 Sheets-Sheet 1 Filed Feb. 10, 1955 INVENTORS LEON/QED P. PPM-D67? H 7'ToRA/E Y 2 Sheets-Sheet 2 L. P. FRIEDER ETAL DETONATOR POUCH INVENTORS 1. I E/505, Q J/w/nscw it Q- ATTORNEY mhuik.

Nov. 19, 1957 Filed Feb. 10, 1955 which. resists penetration by fragments of met al f United States Patent: i ce Our invention relates to a detonator. pouch. an-dimore particularly to: an. improved detonatorpouch. whichiipmtectsathe wearer against injury from; the accidentahdetonati'onof a detonator carried in thepoucl'l and which prevents the sympathetic explosion ofother detonators, 'in

a pouch, by the accidental explosion'of: one of them;

Betonators are employedin demolition work, and; the

li-ke for setting off a charge of an explosive such-as; dynamite -TNT, composition C, or the like. These: detona-' tors each include a charge of; a highexplosiva-suchfis fihd azide', fulm-inate of mercury, PETN, or, the like, housed in. a tube formed of copper, aluminum, onotherzmetal.

' Both. electric and percussion. type. detonators are; made.

When. a blaster is on the job, he; carries a. supply- 0f detonators in a carrying pouch. Thepouches. of the priorart are merely bags for convenient car-rying ofi the detonators. They afford no protection to the person carrying. the pouch in event of an accidental discharge of thedetonatorsin the pouch. In caseof an accidental dis-' charge of a detonator, fragments of the detonatonhousingz tube are driven with. great force through the. walls of the: pouch. Deaths and very serious injuries. have resulted from such accidental explosions. Whendetonators of the electric type explodefaccidentally, fragments" of., the wire, along with tiny. fragments of-rnetal. of, the detonator housing, are driven intoa bearers body .v .Eurther, accidental discharge of one .detonatot, ma=y .;cause sympathetic firing of. adjacent. detonators the sagme caryin p ch.

We have invented a detonator pouch whichcoutains the, explosionv of an accidentally, firedv detpnator and which prevents sympathetic firing. of, adjacent, detonators in. the same pouch. Our pouch, is relatively smalL'compact, and lightweight for the protection which itatfor'ds; Thematerial of which our pouch isformed resists penetration by the tiny fragments of metal, and wire formed during the accidental explosionof a detonator.

One object of our invention is toprovid'e a carrying 2,813,669 Patented Nov. 19, 1957 2 accidental explosion of a carried detonator and also prevents sympathetic firing of detonatorsadjacent an accidentally fireddetonator. It includes an outer container; formed of ballistic fabric, within which we dispose for partial? removal therefrom an inner flap of ballistic ma= teri'a l, On the inner flap we form a numberof compartmerits of ballistic material. Each of these compartments is adapted to contain a detonatorr The inner flap is so constructed thatit maybe partially withdrawn fromthe container, wrapped about the cartridge compartments, and insertedwithin the outer container. We secureto the container by any convenient means a cover flap overlapping-a portion: of the: front of the container. Weprovide our pouch with a novel carrying means which is readily releasable to permit the pouch to fall fromlthe wearer s body.

In the accompanyingdrawings which form part of: the instant specification and which are to be read in conjunction therewith and inwhich like reference numerals" are used to indicate like parts in. the various views:

Figure l is a perspective view of one form-of. our detonation carrying pouch showing the manner i'n. which the outer container cover is secured to the front ofthe pouch.

Figure?) is a-perspective' view of the form of our detonatoncarrying. pouch shown in Figure 1 showing the means by which thepouch may be carried on a wearers body.

Figured isa'p'erspective view of the form of our: detonator carrying pouchshown. in. Figure 1 with the outer container cover open and with the inner flap raised to show; the arrangementofthe' detonators within. their-respectivecompartments.

Eigure. 4 is ausectionale view, taken along the line 4 4 of F-igure .3, of the form. of our detonator carrying pouch shown in Figure" l.

' Figure 5. isa sectional view, taken along the line 5-5:of Figure .4, drawn on; an. enlarged: scale, ofi the form of our detonator. carrying pouchshown in Figure 1.

Figureao is; a fragmentary perspective view; drawn on ancnlarged: scale, of one type ofba-llistic material which mayzberused in our detonator carrying pouch.

More particularly referring now to the drawings, our detonaton'pouch includes an. outer container, indicated generally by the reference character 10, the front 14, bot- 1 tomi. 16;.back-l8, and: cover 20% of which are formed; of' an integraltleug-th.ofmaterial, the nature of which will: be

pouch for detonators which protects the wearer fiom'in jury resulting from the accidental di s :harge of a d etonator housed in the pouch.

Another object of our inventionis, to provide acarrying pouch for. detonators which contains th e explosioinofan accidentally fired detonator.

A further object of our invention is to provide a carrying pouch for detonatorswhichprevents sympathetic firof adjacent detonators when' one detonator is acCid'entally fired.

A still further object of our invention is-to provides.

a protective detonator carrying pouch which iscornpact,

small, and. lightweight.

Other-and further objects of. our invention will: appear from the following description.

Ingeneral, our invention contemplates thegprovisior of a. detonator carrying. pouchforrned, oft-bani ic material arm during, the accidental; explosion of, a; detonator. arried n-1. ou h cs nstme sdr hfltritrn ews describedsinydetai-l hereinafter. Respective lines of heavy stitching 26 and;2,8,secure a pair of respective side panels 2 mm 24,to the front. 14, base 16, and back 18 of' the container LO-atits sides. The cover 20 is extended-at 30 to overlie a portionof thefront 14 when it is in the closed position, suitable securing means may be employed to. hold, the; cover 29 in closed position. Conveniently,

I Wesecure anumberof leather buttons 32 at spaced points as. a knot or the like:

. along a lines adjacent the edge ofcover 20 by thread 34.

Each, of, the buttons 32 carries a length of braided. cord 36 1 anchorstd. atone end; to a button 32 by means such To close cover 20 the lengths: 36 carried by-buttons-S'Z engage buttons 38 secured at spaced lgcatiofls al-Ong the length of, front 14 by stitching. 40. "Cover; 20 maybe closed tightly on, the container 10 by passing lengths-3 6. alternately aboutrespective buttons. 38

v and 32. Itis; to be; understood that. cards- 36 and button 32 and. 38 may bereplaced by any, other suitable taste 'ng means, such for example, as snap fasteners, if esir d.

If desired we may form. a pocket 42 for carrying a tool, such;as an awl or the like, by, securing apiece of nylonfabricll, to side, 22 by stitching 46. Av flap 48.- securedf-tothe topfof side 22 by suitable stitching carries a button 5 0 by. meanscf threads 52, Button carries a length oLB aidedcQrd. 54,.which:may be wrapped alter- 3 nately about a button 56 held on fabric 44 by thread '8 and about button 50 to close pocket 42. Cord 54 and buttons 50 and 56 may be replaced by other suitable fastening means, if desired. i

We may form a second pocket 60 on side 24 by securing a piece of fabric 62 thereto by stitching 64. A flap 66 suitably sewed to the top of side 24 providesa closure for pocket 60. Respective threads 72 and 74 secure a pair of buttons 68 and 70 to flap 66 and fabric 62. A braided cord 76 carried by button 68 may be wound alternately about button 70 and about button 68 to secure flap 66 in its closed position.

In order to provide a means by which the pouch may be carried, we form a belt 78 from an appropriate material, such as fabric webbing or the like. A pair of fabric pieces 80 and 82 securedto the back 18 of container by respective lines of stitching 90 and 92 retain belt 78 on container 10. One end of belt 78 is formed with a number of spaced longitudinal openings 94. -The other end of belt 78 carries an eye 96 which may be passed through an opening 94 when the pouch is to be carried. I secure one end of a shoulder strap 98, which may be formed of textile webbing or the like, to the portion of belt 78 between fabric pieces 80 and 82 by'stitch ing 100. The end of strap 98 remote from stitching 100 passes through the eye 102 of a hook 104 and is secured back along the length of strap 98 by stitching 106. A spring 108 carried by the shank of hook 104 normally closes the hook opening. When the pouch is assembled on the wearers body, belt 78 passes around the wearers waist and eye 96 passes through an opening 94corresponding to the waist size of the wearer. Strap 98 passes over the wearers shoulder and the hook 104 engages eye 96. It will be appreciated that this means for supporting the pouch on the wearers body may readily be released to permit the pouch to be dofifed by the wearer. To accomplish this, I press spring 108 to open hook 104 and then slip the book out of eye 96. The end of belt 78 formed with openings 94 falls away from eye 96 and the pouch falls away from the wearers body.

Referring now to Figures 3 to 5, We fix one end of an inner flap, indicated generally by the reference character 110, along the interior surface of the front 14 of the container 10 by stitching 112. Flap 110 is formed of the same material as container 10 and, in the'closed position shown in Figure 5, it includes a front 114, a base 116, a

back 118, a top 120, and a front closure portion 122'. In this closed position shown in Figure 5, the portion 122 is inserted into the space between front 114 and back 118 of inner flap 110. In the position shown in Figure 3, portion 122 of flap 110 is withdrawn from within the space between front 114 and back 118 to expose a plurality of compartments 124 carried by the back 118 of flap 110. Compartments 124 are formed by a continuous length of flexible ballistic material of a nature similar to that of which container 10 and flap 110 are formed. This length of material is doubled on itself and stitched at spaced points to form vertical lines of stitching 126. It will be seen that adjacent lines of stitching 126 form the length of ballistic material into compartments 124. A pair of vertical lines of stitching 126 between the center compartments 124 secure the respective ends of the-length disposed at any other convenient location.

In order to provide a means by which detonators'carried in the compartments 124 may expeditiously beremoved therefrom, we encase each of the respective detonators 130 in a sleevel32. The detonators 130 are supported at one end in a rubber plug or the like 134" and then inserted in a sleeve 132. Sleeves 132 carrying detona tors 130 are then placed within compartments 124. The sleeves 132 may advantageously be made of a tightly woven, thin nylon fabric which has a smooth surface so that the sleeves 132 may readily be withdrawn from the compartments 124. We form each of the sleeves 132 with tabs 136 at its upper end by means of which the sleeve and detonator are withdrawn from a compartment 124. Electric detonators are generally supplied in cardboard tubes which house the detonator and the lengths of wire to be used therewith. When these detonators are to be carried in one of our pouches, the explosive charge 130 and plug 134 are removed from the cardboard cylinders, enclosed in sleeves 132, and inserted within the compartments 124. The wire which is to be used with the detonator is left in the cardboard cylinder, and the cylinders are placed one on top of the other between the portion 122 of flap 120 and the front walls of compartments 124. This can be seen by reference to Figure 5 in whichwe have indicated the cardboard containers by the reference character 138 and the detonator wiring by the reference character 140. It will be understood that when these electric type detonators are stored in our pouch, the size of the pouch must be sufiiciently large to house the cardboard cylinders 138 as well as the detonating charges 130. If percussion type detonators are employed, the pouch may,'of course, be smaller.

We have found that we may form a fabric having superior explosion containing properties by forming the fabric of a plurality of stacked fabric laminates, each of which is made of yarns formed of continuous, synthetic, filamentary threads spun to a predetermined number of convolutions per unit length. Referring nowto Fi ures, the length of fabric making up the front 14, bottom 16, back 18, and cover 20 of our pouch includes a stack of fabric laminates 142. Each of the laminates 142 is made up of yarns including a number of threads. Each of the threads includes a number of continuous filaments of a material such as nylon or the like. I We spin the filaments making up a thread of our material to within a predetei mined range of percentages of their ultimate elongation. To accomplish this, we place a length of filamentary material of which the threads are to be formed under controlled tension and measure its elongation up to the point at which the filament parts. We have discovered that if we spin the filaments making up a thread to a tension which is within the range of tensions required to produce, respectively, an elongation which is fifty percent of the ultimate elongation and an elongation which is ninety percent of the ultimate elongation of the material, we produce a fabric which has superior resistance to rupture.

When a thread of our fabric is to be made up, we first determine the tension per unit of cross-sectional area required to produce an elongation which is fifty percent of the theretofore determined ultimate elongation of the material. We then determine the tension'per unit of cross-sectional area required to produce an elongation which is ninety percent of the ultimate elongation of the material. Each of the threads may include any convenient number of filaments such, for example, as thirtyfour. We spin this bundle of filaments on a suitable torsional apparatus, and determine the number of convolutions per unit length of the bundle required to produce an elongation which is fifty percent of the ultimate elongation of an individual filament. We then determine the number ofconvolutions per unit length required to produce a tension which corresponds to an elongation which is ninety percent of the ultimate elongation of an indi- When-alaminate 142 is to be formedfrpm thesethreads,

While our explosion=resistant faliriirmay include-merely an assembled stack of laminates 142, we may, if desired, employ loose basting stitches 148 for holding the laminates 142 in stacked relationship. Alternately, we may employ a fabric of the nature disclosed in our copending application, Serial No. 362,338, filed June 17, 1953, now

pending. The fabric disclosed in this said copending application includes a plurality of fabric laminates, similar to laminates 142, which are bonded to one aonther by spaced bonds formed by interweaving the respective laminates making up the fabric. In the form of our pouch shown we include only five stacked laminates in the material making up the front 14, bottom 16, back 18, and cover 20. Sides 22 and 24, as well as the inner flap 110, also include only five laminates. making up compartments 124 may conveniently include ten laminates or a double thickness of material each of which thicknesses includes five laminates. It will be understood that the number of laminates included in each of the parts of our pouch may be varied as necessary to provide the required measure of protection. We encase the length of laminated material making up each of the parts of our pouch in a suitable material such as tightly woven nylon fabric similar to the nylon fabric 144. We close the ends of the enclosing fabric 144 by stitching 146 to provide an envelope around the laminated assemblies enclosed thereby.

When our pouch is to be used to store detonators, we open cover and withdraw the portion 122 of flap 120 in the manner shown in Figure 3. For purposes of convenience in loading, we have disposed the stitching 112 securing flap 120 in the interior of the container at a location which permits flap 120 to be partially withdrawn from within the container. In the withdrawn position of fiap 120 the compartments 124 are exposed to permit ready loading thereof. When we wish to store detonators of the electric type in our pouch, we remove the detonator charges 130 and mounting plugs 134 from the cardboard carrying cylinders 138. We then insert each of the detonators 130 along with its mounting plug 134 in a sleeve 132 and place sleeves 132 in the respective compartments 124. The wire for each of the respective electric detonators is left in one of the cardboard carrying cylinders 138. We stack cylinders 138 one on top of the other in front of the compartments 124 and insert the portion 122 or flap 120 between the front 114 of flap 120 and the cardboard carrying cylinders 138. We close cover 20 of the container and secure it in its closed position by the lengths of braided cord 36 carried by the buttons 32. The loaded pouch is then assembled on the wearers body by passing belt 78 about his waist and inserting eye 96 through an opening 94. Shoulder strap 98 passes over one shoulder of the wearer and hook 104 snaps into engagement with eye 96. This carrying arrangement permits the wearer to shed the pouch by merely unlatching hook 104 from eye 96 and permitting the pouch and carrying straps to fall away from his body. In the event one of the detonator charges 130 explodes, penetration of fragments of the metal tube of charge 130 or of fragments of the wire is prevented by the stacked laminates 142 making up the material of which the pouch is formed. The individual compartments 124 prevent sympathetic firing of charges adjacent an accidentally exploded charge. When detonators of the percussion type The length of material areused, no space need be left within the container for cardboardcarrying'tubes'138.

While we have shown only one"'formiof ourfdtbriator pouch, it will be. understood that the pouch niaytalee many forms; It may bemade*toicontainasmany charges as desired. It may be formed withor without carrying pockets 42* and6 0: Any convenients'ecuring means may be substituted for buttons; 32 and 38 and' braitled 'cord's 36." Barthel-,1 otherand" different-typesof -carrying means tha'n belt 78 andfstrap 98maybeemployed: Y

It will be seen that wehaveaccdmrilishdttheobjects of" our invention? We have provided aidetonatoncarry ing pouch which prevents injury to the wearenfionrtli'e' accidental explosion of, a detonator, charge..within the pouch. O'u'r pouch is so constructed" that" it prevents sympathetic firing-ofadjacentdetonator cliarges to an ac cidentally fired detonator charge, Ounpouch is 'eompact, small, and lightweight. We have provided our pouch with a carrying means which permits the wearer readily to dofi the pouch.

It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of our claims. It is further obvious that various changes may be made in details within the scope of our claims without departing from the spirit of our invention. It is, therefore, to be understood that our invention is not to be limited to the specific details shown and described.

Having thus described our invention, what we claim 1. A pouch for storing detonators including in combination an outer container, an inner flap fixed within said container, and a plurality of detonator carrying compartments mounted on said flap, said inner flap having a length sufficient to permit the fiap to be wrapped around the compartments mounted thereon to aid in containing the explosion resulting from the accidental firing of a detonator, each of said outer container and flap and compartments being formed of ballistic material.

2. A pouch as in claim 1 in which said outer container includes a front and a cover formed with a portion overlying said front when said cover is in a closed position and means for securing said cover to said front.

3. A pouch as in claim 1 in which said inner flap is formed of ballistic material, and means for securing one end of said inner flap Within said outer container, the other end of said inner flap being free for its removal from the outer container.

4. A pouch as in claim 1 including sleeves by means of which said detonators are carried in said compartments for ready removal therefrom.

5. A pouch as in claim 1 in which said ballistic material includes a plurality of fabric laminates, each of said laminates being formed of yarns made up of continuous synthetic filament threads spun to a predetermined number of convolutions per unit length.

6. A pouch as in claim 1 in which said ballistic material includes threads made up of continuous synthetic filaments, each of said threads being spun to a number of convolutions per unit length within the range of convolutions which corresponds to between fifty and ninety percent of the ultimate elongation of a filament.

7. A pouch as in claim 1 in which said ballistic material includes a plurality of stacked fabric laminates, each of said laminates being formed of yarns made up of continuous synthetic filament threads spun to a predetermined number of convolutions per unit length, and means for retaining said laminates in stacked relationship.

8. A pouch as in claim 1 including a carrying belt secured to said outer container and formed with a slot adjacent one end thereof, an eye carried adjacent the end of said belt remote from the slot, a shoulder strap fixed at one end to said belt, and a hook carried at the other end of said shoulder strap.

9. A pouch as in claim 1 wherein said outer container includes a pair of sides and a pair of pockets formed respectivelyat said sides.

10. 1 A pouch for storing detonators including in combination an outer container, an elongated inner flap having a pair of ends, a plurality of detonator carrying compartments, means securing said detonator compartments to said elongated flap intermediate the flap ends, and means securing one of said flap ends within said container, said inner flap being adapted to be wrapped around said compartments for insertion within said container.

References Cited in the file of this patent UNITED STATES PATENTS ,1 8 Lindsey July 16, Jennings Feb. 19, 'Iames May 25, Prirnley Nov. 8, Barol July 2, Feigl et a1. Nov. 4,

FOREIGN PATENTS Great: Britain May 15, Switzerland Feb. 1,

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