CA1203121A - Initiating connector - Google Patents
Initiating connectorInfo
- Publication number
- CA1203121A CA1203121A CA000418316A CA418316A CA1203121A CA 1203121 A CA1203121 A CA 1203121A CA 000418316 A CA000418316 A CA 000418316A CA 418316 A CA418316 A CA 418316A CA 1203121 A CA1203121 A CA 1203121A
- Authority
- CA
- Canada
- Prior art keywords
- propagating
- fuse
- connector
- socket
- propagator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000000977 initiatory effect Effects 0.000 title abstract description 8
- 238000005422 blasting Methods 0.000 claims abstract description 5
- 239000002991 molded plastic Substances 0.000 claims abstract 2
- 230000001902 propagating effect Effects 0.000 claims description 52
- 239000002360 explosive Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 238000005474 detonation Methods 0.000 abstract description 6
- TZRXHJWUDPFEEY-UHFFFAOYSA-N Pentaerythritol Tetranitrate Chemical compound [O-][N+](=O)OCC(CO[N+]([O-])=O)(CO[N+]([O-])=O)CO[N+]([O-])=O TZRXHJWUDPFEEY-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 150000001540 azides Chemical class 0.000 description 2
- 238000004200 deflagration Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000000026 Pentaerythritol tetranitrate Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 229960004321 pentaerithrityl tetranitrate Drugs 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
- C06C5/06—Fuse igniting means; Fuse connectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/0815—Intermediate ignition capsules, i.e. self-contained primary pyrotechnic module transmitting the initial firing signal to the secondary explosive, e.g. using electric, radio frequency, optical or percussion signals to the secondary explosive
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Fuses (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A molded plastic connector device is disclosed for providing initiation of a detonating fuse from an adjacent fuse or blasting cap. The connector comprises a closed-end, tube-like receptacle which holds a blasting cap or first detonating fuse in its open end. The closed end is adapted for the quick attachment by clipping of a length of a second detonating fuse. Upon detonation of the first fuse or cap, the second fuse is initiated. The cap may include a delay element. The connector is designed for the quick assembly of fuse networks in the field.
A molded plastic connector device is disclosed for providing initiation of a detonating fuse from an adjacent fuse or blasting cap. The connector comprises a closed-end, tube-like receptacle which holds a blasting cap or first detonating fuse in its open end. The closed end is adapted for the quick attachment by clipping of a length of a second detonating fuse. Upon detonation of the first fuse or cap, the second fuse is initiated. The cap may include a delay element. The connector is designed for the quick assembly of fuse networks in the field.
Description
~2~3~Z~
~ HIS INVENTION relates to a connector for initiating a detonation or deflagration in a fuse. The detonation or deflagration may be propagated from one fuse to another. These fuses may be low-energy fuses or not. By "low-energy fuse" is meant a fuse which has such a small explosive effect that it is not capable of itself propaga-ting a detonation from one fuse to another.
According to a first aspect of the invention there is provided a propagating connector which comprises a tubular member that is hollow to define an elongate blind socket having its mouth at one end of the member and at its other end a securing means whereby fuse may be secured to the member.
The securing means may comprise at least one securing channel into which a straight length of fuse may be clipped to be secured therein.
According to a second aspect of the invention there is provided a propagating connector which comprises an elongate member having at one end at least one securing channel into which a straight length of fuse may be clipped to be secured therein.
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The channel may be linear and may have a substan-tially circular cross-sectional profile. The size of the channel may be slightly smaller than that of the fuse with which it is intended to be used. The channel may have an entrance slot that opens out in a direction away from the channel, which may be transversely to the axis of the member or longitudinally with respect thereto. The entrance slot may taper inwardly. The member may be of any suitable material, in particular any suitable synthetic plastics material. For example it may be of polyethylene.
~ s indicated above, the member may have a blind socket. The closed end of the socket may be adjacent the or each securing channel and may be separated therefrom by a web.
The closed end of the socket may be shaped to channel a propa-gating shock wave towards the or each channel.
The connector may be moulded in one piece in a suitable mould. The invention accordingly extends to a mould for moulding a propagating connector as defined above, the mould having suitable complementary moulding formations.
The invention extends to a propagating device which comprises a propagating connector according to the invention, that is hollow to define an elongate blind socket;
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a propogating base charge within the blind socket adjacent its closed end; and an end of a length of propagator fuse secured within the blind socket via its open end~
The base charge may be a pyrotechnic or explosive composition. It may be a primary explosive material such as lead azide or a combination of a primary and secondary explosive material such as a combination of lead azide and pentaerythritol-tetranitrate (PETN~. It may still further be a low-strength or high-strength charge.
In regard to the propagator fuse, it may be any one of a low-energy fuse such as that known as Nonel, an electric fusehead, a fuse, and a low-energy detonator cord.
It will be appreciated that the use to which the detonation is propagated, hereinafter referred to as the propagatee fuse, which is clipped into the securing channel(s) may be Nonel, detonating cord of charge from 1 g/m to 10 g/m~ or a pyrotechnic cord.
Those skilled in the art will appreciate that the propagator fuse may be secured in the connector by any- suitable means. Thus the propagator fuse may be secured in the connector via a closure plug and/or a ferrule. The ferrule may extend the entire length of the member or along only a part thereof.
Where the ferrule extends along a part only of the member, the member may be`thinner along that part wherealong the ferrule extends.
3~L2~
The addressee of this specification will further appreciate that at least one delay element may be interposed between the free end of the propagator fuse and the base charge. The or each such delay elements may be single or multi-cored, rigid and incrementally filled, or drawn. Thus the propagating device may act instantaneously or may incorporate a time delay.
The propagating device may be used in a stoping or tunneling application, particularly with Nonel, either in the blasting system itself to propagate initiation from one length of fuse to another or to start initiation thereof. Further, the propagating device may be used in a noiseless trunkline application, or to ignite an ignitercord.
Even further according to the invention there is provided a propagating module which comprises a length of fuse having at one ena a propagating device in accordance with the invention.
The length of fuse may have, at its other end, a detonator.
According to a still further aspect of the invention there is provided a method of manufacturing a propagating de-vice, which includes providing a propagating connector having a blind socket therein;
inserting propagating base charge material into the socket; and 3~21 securing an end of a length of propagator fuse into the socket via its mouth and closing the mouth.
The method may include inserting a delay element into the socket, between the end of the propagator fuse and the base charge.
The invention is now described, by way of examples, with reference to the accompanying drawings, in which:-Figure 1 shows a longitudinal sectional view of oneembodiment of a propagating connector in accordance with the invention, and Figures 2 to 5 show longitudinal sectional views of various propagating devices in accordance with the invention, utilising various different connectors.
Referring to Figure 1, shown therein generally by reference numeral 10 is a propagating connector in accordance with the invention. The connector 10 is moulded from polyethylene and, as shown, comprises a tubular èlongate member l2 having therein a blind socket 14, which has its mouth 16 at one end 18 of the member 12, the member 12 having at its other end 20 a securing channel 22 into which propagating fuse (not shown) may be clipped. The channel 22 has a tapered entrance slot 24 which opens out transversely. It will further be noted that the channel 22 has a circular cross-section, the diameter thereof being slightly less than the diameter of Nonel tubing with which it is to be used.
' ~;
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The blind socket 14 is slightly tapered and at its blind end is convexed so that a shoc~-wave generated therein is channelled towards the channel 22. Further, towards its end 18 the member 12 is narrowed, as at 26 to acco~modate a ferrule, as will be described below with reference to the other Figures.
Referring now to Figure 2, shown therein is a propagating device 30. The device 30 comprises a connector 32 similar to that shown in Figure 1, except that the channel 22 is oblong so that it may accommodate two propagatee fuses. Within the blind socket 14 there is a base charge 34 packèd into the blind socket 14 against its blind end; a delay element 36 and propagator Nonel 38. The propagator Nonel 38 is held in place b~ means of a closure plug 40 and a crimped ferrule 42 (crimp not shown). It will be appreciated, that with the propagating device 30 if propagatee fuse is clipped into the channel 22 and the propagator fuse 38 is initiated, the propagator fuse 38 will initiate the base charge 34 after a time interval determined by the delay element 36 with the base charge 34 initiating the propàgatee fuse.
Referring now to Figure 3, an electric propagating device is shown, referred to by numeral 50. The propagating device 50 has a connector 52 that has two securing channels 54, having entrance slots 24 which open out longitudinally. The starter 50 also has base charge 34 and a delay element 36 with an electric fuse head 56 held in place by means of a closure plug 40 and a crimped ferrule 42.
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Referring now to Fi~ure 4, the propagating device 60 shown therein has a connector 62 similar to that shown in Figure 1 within which is packed a base charge comprising a primary explosive material 64 and a secondary explosive material 66. In this case the propagator fuse is conventional fuse 68 which is held in place by means of a crimped ferrule 42.
Referring finally to Figure 5, the propagating device 70 shown therein has a connector 72 similar to that shown in Figure 1 except that the mouth 24 of the channel 22 is axially directed. This device 70 also has a base charge 34, two delay elements 36 and propagator fuse 74 in the form of low energy detonator cord. This propagator fuse 74 is also held in place by means of a closure plug 40 and a crimped ferrule 42.
As indicated above, the propagating devices may be used in stoping or development applications, either in the blasting system itself to propagate initiation from one end of the blast to another or to start initiation thereof. Further, the propagating device may be used in a noiseless trunkline application, or to "start" an ignitercord trunkline.
The propagating devices in accordance with the invention, at least those illustrated above, have the advantage that they utilise one-piece connectors into which the elements of a detonator are directly packed resulting in a simple, cheap and reliable construction; as the connectors are of plastic, no ~r ~
~2~31Z~;
g shrapllel i.s generated in use; further, as the connectors are of an electrically insulating material, the possibility of detonation due to electrostatic charges is minimised.
\
~ HIS INVENTION relates to a connector for initiating a detonation or deflagration in a fuse. The detonation or deflagration may be propagated from one fuse to another. These fuses may be low-energy fuses or not. By "low-energy fuse" is meant a fuse which has such a small explosive effect that it is not capable of itself propaga-ting a detonation from one fuse to another.
According to a first aspect of the invention there is provided a propagating connector which comprises a tubular member that is hollow to define an elongate blind socket having its mouth at one end of the member and at its other end a securing means whereby fuse may be secured to the member.
The securing means may comprise at least one securing channel into which a straight length of fuse may be clipped to be secured therein.
According to a second aspect of the invention there is provided a propagating connector which comprises an elongate member having at one end at least one securing channel into which a straight length of fuse may be clipped to be secured therein.
` 4 ~;Z 03~Z~
The channel may be linear and may have a substan-tially circular cross-sectional profile. The size of the channel may be slightly smaller than that of the fuse with which it is intended to be used. The channel may have an entrance slot that opens out in a direction away from the channel, which may be transversely to the axis of the member or longitudinally with respect thereto. The entrance slot may taper inwardly. The member may be of any suitable material, in particular any suitable synthetic plastics material. For example it may be of polyethylene.
~ s indicated above, the member may have a blind socket. The closed end of the socket may be adjacent the or each securing channel and may be separated therefrom by a web.
The closed end of the socket may be shaped to channel a propa-gating shock wave towards the or each channel.
The connector may be moulded in one piece in a suitable mould. The invention accordingly extends to a mould for moulding a propagating connector as defined above, the mould having suitable complementary moulding formations.
The invention extends to a propagating device which comprises a propagating connector according to the invention, that is hollow to define an elongate blind socket;
~2~ Zl;
.~
a propogating base charge within the blind socket adjacent its closed end; and an end of a length of propagator fuse secured within the blind socket via its open end~
The base charge may be a pyrotechnic or explosive composition. It may be a primary explosive material such as lead azide or a combination of a primary and secondary explosive material such as a combination of lead azide and pentaerythritol-tetranitrate (PETN~. It may still further be a low-strength or high-strength charge.
In regard to the propagator fuse, it may be any one of a low-energy fuse such as that known as Nonel, an electric fusehead, a fuse, and a low-energy detonator cord.
It will be appreciated that the use to which the detonation is propagated, hereinafter referred to as the propagatee fuse, which is clipped into the securing channel(s) may be Nonel, detonating cord of charge from 1 g/m to 10 g/m~ or a pyrotechnic cord.
Those skilled in the art will appreciate that the propagator fuse may be secured in the connector by any- suitable means. Thus the propagator fuse may be secured in the connector via a closure plug and/or a ferrule. The ferrule may extend the entire length of the member or along only a part thereof.
Where the ferrule extends along a part only of the member, the member may be`thinner along that part wherealong the ferrule extends.
3~L2~
The addressee of this specification will further appreciate that at least one delay element may be interposed between the free end of the propagator fuse and the base charge. The or each such delay elements may be single or multi-cored, rigid and incrementally filled, or drawn. Thus the propagating device may act instantaneously or may incorporate a time delay.
The propagating device may be used in a stoping or tunneling application, particularly with Nonel, either in the blasting system itself to propagate initiation from one length of fuse to another or to start initiation thereof. Further, the propagating device may be used in a noiseless trunkline application, or to ignite an ignitercord.
Even further according to the invention there is provided a propagating module which comprises a length of fuse having at one ena a propagating device in accordance with the invention.
The length of fuse may have, at its other end, a detonator.
According to a still further aspect of the invention there is provided a method of manufacturing a propagating de-vice, which includes providing a propagating connector having a blind socket therein;
inserting propagating base charge material into the socket; and 3~21 securing an end of a length of propagator fuse into the socket via its mouth and closing the mouth.
The method may include inserting a delay element into the socket, between the end of the propagator fuse and the base charge.
The invention is now described, by way of examples, with reference to the accompanying drawings, in which:-Figure 1 shows a longitudinal sectional view of oneembodiment of a propagating connector in accordance with the invention, and Figures 2 to 5 show longitudinal sectional views of various propagating devices in accordance with the invention, utilising various different connectors.
Referring to Figure 1, shown therein generally by reference numeral 10 is a propagating connector in accordance with the invention. The connector 10 is moulded from polyethylene and, as shown, comprises a tubular èlongate member l2 having therein a blind socket 14, which has its mouth 16 at one end 18 of the member 12, the member 12 having at its other end 20 a securing channel 22 into which propagating fuse (not shown) may be clipped. The channel 22 has a tapered entrance slot 24 which opens out transversely. It will further be noted that the channel 22 has a circular cross-section, the diameter thereof being slightly less than the diameter of Nonel tubing with which it is to be used.
' ~;
~Z03~I
The blind socket 14 is slightly tapered and at its blind end is convexed so that a shoc~-wave generated therein is channelled towards the channel 22. Further, towards its end 18 the member 12 is narrowed, as at 26 to acco~modate a ferrule, as will be described below with reference to the other Figures.
Referring now to Figure 2, shown therein is a propagating device 30. The device 30 comprises a connector 32 similar to that shown in Figure 1, except that the channel 22 is oblong so that it may accommodate two propagatee fuses. Within the blind socket 14 there is a base charge 34 packèd into the blind socket 14 against its blind end; a delay element 36 and propagator Nonel 38. The propagator Nonel 38 is held in place b~ means of a closure plug 40 and a crimped ferrule 42 (crimp not shown). It will be appreciated, that with the propagating device 30 if propagatee fuse is clipped into the channel 22 and the propagator fuse 38 is initiated, the propagator fuse 38 will initiate the base charge 34 after a time interval determined by the delay element 36 with the base charge 34 initiating the propàgatee fuse.
Referring now to Figure 3, an electric propagating device is shown, referred to by numeral 50. The propagating device 50 has a connector 52 that has two securing channels 54, having entrance slots 24 which open out longitudinally. The starter 50 also has base charge 34 and a delay element 36 with an electric fuse head 56 held in place by means of a closure plug 40 and a crimped ferrule 42.
~Z~3~Zl;
Referring now to Fi~ure 4, the propagating device 60 shown therein has a connector 62 similar to that shown in Figure 1 within which is packed a base charge comprising a primary explosive material 64 and a secondary explosive material 66. In this case the propagator fuse is conventional fuse 68 which is held in place by means of a crimped ferrule 42.
Referring finally to Figure 5, the propagating device 70 shown therein has a connector 72 similar to that shown in Figure 1 except that the mouth 24 of the channel 22 is axially directed. This device 70 also has a base charge 34, two delay elements 36 and propagator fuse 74 in the form of low energy detonator cord. This propagator fuse 74 is also held in place by means of a closure plug 40 and a crimped ferrule 42.
As indicated above, the propagating devices may be used in stoping or development applications, either in the blasting system itself to propagate initiation from one end of the blast to another or to start initiation thereof. Further, the propagating device may be used in a noiseless trunkline application, or to "start" an ignitercord trunkline.
The propagating devices in accordance with the invention, at least those illustrated above, have the advantage that they utilise one-piece connectors into which the elements of a detonator are directly packed resulting in a simple, cheap and reliable construction; as the connectors are of plastic, no ~r ~
~2~31Z~;
g shrapllel i.s generated in use; further, as the connectors are of an electrically insulating material, the possibility of detonation due to electrostatic charges is minimised.
\
Claims (20)
1. A moulded plastics propagating connector for use between adjacent detonating fuses or between a detonating fuse and adjacent blasting cap which comprises a tubular member that is hollow to define an elongate blind socket having its mouth at one end of the member and at its other end a securing means whereby a detonating fuse may be secured to the member.
2. A propagating connector as claimed in Claim 1 wherein the securing means comprises at least one securing channel into which a straight length of detonating fuse may be clipped to be secured therein.
3. A propagating connector which comprises an elongate member having at one end at least one securing channel into which a straight length of detonating fuse may be clipped to be secured therein.
4. A propagating connector as claimed in Claim 2 or Claim 3, wherein the said securing channel is linear and of circular cross-sectional profile.
5. A propagating connector as claimed in Claim 2 or Claim 3, wherein the size of the securing channel is slightly smaller than that of the detonating fuse with which it is intended to be used.
6. A propagating connector as claimed in Claim 2 or Claim 3, wherein the securing channel has an entrance slot that opens out in a direction away from the channel.
7. A propagating connector as claimed in Claim 2, wherein a closed-end socket is adjacent the or each securing channel.
8. A propagating connector as claimed in Claim 7, wherein the closed end of the socket is shaped to channel a propagating shock towards the or each securing channel.
9. A propagating device which comprises:
a propagating connector as claimed in Claim 1;
a propagating base charge within the blind socket, adjacent its closed end; and an end of a length of propagator fuse secured within the blind socket via its open end.
a propagating connector as claimed in Claim 1;
a propagating base charge within the blind socket, adjacent its closed end; and an end of a length of propagator fuse secured within the blind socket via its open end.
10. A propagating device as claimed in Claim 9, wherein the base charge is a pyrotechnic composition.
11. A propagating device as claimed in Claim 9, wherein the base charge is a primary explosive.
12. A propagating device as claimed in Claim 9, wherein the base charge is a combination of a primary and a secondary explosive.
13. A propagating device as claimed in Claim 9, wherein the propagator fuse is any one of a low-energy fuse, an electric fuse-head, a fuse, or a low-energy detonator cord.
14. A propagating device as claimed in Claim 9, wherein the propagator fuse is secured in the connector via a closure plug or a ferrule.
15. A propagating device as claimed in Claim 14 wherein the ferrule extends along a part only of the member, and the member is thinner along that part wherealong the ferrule extends.
16. A progagating device as claimed in Claim 9, wherein at least one delay element is interposed between the free end of the propagator fuse and the base charge.
17. A propagating module which comprises a length of fuse having at one end a propagating device as claimed in Claim 9.
18. A propagating module as claimed in Claim 17, wherein the length of fuse has, at its other end, a detonator.
19. A method of manufacturing a propagating device which includes:
providing a propagating connector having a blind socket therein;
inserting propagating base charge material into the socket, and securing an end of a length of propagator fuse into the socket via its open end and closing the open end.
providing a propagating connector having a blind socket therein;
inserting propagating base charge material into the socket, and securing an end of a length of propagator fuse into the socket via its open end and closing the open end.
20. A method as claimed in Claim 19, which includes inserting a delay element into the socket, between the end of the propagator fuse and the base charge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA81/9023 | 1981-12-30 | ||
| ZA819023 | 1981-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1203121A true CA1203121A (en) | 1986-04-15 |
Family
ID=25575823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000418316A Expired CA1203121A (en) | 1981-12-30 | 1982-12-22 | Initiating connector |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1203121A (en) |
| SE (1) | SE8207301L (en) |
| ZW (1) | ZW26282A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171935A (en) * | 1992-11-05 | 1992-12-15 | The Ensign-Bickford Company | Low-energy blasting initiation system method and surface connection thereof |
| US5398611A (en) * | 1990-11-05 | 1995-03-21 | The Ensign-Bickford Company | Low energy blasting initiation system, method and surface connection therefor |
| US5499581A (en) * | 1994-05-26 | 1996-03-19 | The Ensign-Bickford Company | Molded article having integral displaceable member or members and method of use |
| US5659149A (en) * | 1996-01-18 | 1997-08-19 | The Ensign-Bickford Company | Secure connector for blast initiation signal transfer |
| US5703320A (en) * | 1996-01-18 | 1997-12-30 | The Ensign Bickford Company | Connector for blast initiation system |
| US5708228A (en) * | 1996-01-11 | 1998-01-13 | The Ensign-Bickford Company | Method and apparatus for transfer of initiation signals |
| US5792975A (en) * | 1994-05-26 | 1998-08-11 | The Ensign-Bickford Company | Connector block having detonator-positioning locking means |
| US6123025A (en) * | 1991-10-30 | 2000-09-26 | Orica Explosives Technology Pty Ltd. | Low noise, low shrapnel detonator assembly for initiating signal transmission lines |
-
1982
- 1982-12-13 ZW ZW262/82A patent/ZW26282A1/en unknown
- 1982-12-21 SE SE8207301A patent/SE8207301L/en unknown
- 1982-12-22 CA CA000418316A patent/CA1203121A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5398611A (en) * | 1990-11-05 | 1995-03-21 | The Ensign-Bickford Company | Low energy blasting initiation system, method and surface connection therefor |
| US6123025A (en) * | 1991-10-30 | 2000-09-26 | Orica Explosives Technology Pty Ltd. | Low noise, low shrapnel detonator assembly for initiating signal transmission lines |
| US5171935A (en) * | 1992-11-05 | 1992-12-15 | The Ensign-Bickford Company | Low-energy blasting initiation system method and surface connection thereof |
| US5499581A (en) * | 1994-05-26 | 1996-03-19 | The Ensign-Bickford Company | Molded article having integral displaceable member or members and method of use |
| US5792975A (en) * | 1994-05-26 | 1998-08-11 | The Ensign-Bickford Company | Connector block having detonator-positioning locking means |
| US5708228A (en) * | 1996-01-11 | 1998-01-13 | The Ensign-Bickford Company | Method and apparatus for transfer of initiation signals |
| US5659149A (en) * | 1996-01-18 | 1997-08-19 | The Ensign-Bickford Company | Secure connector for blast initiation signal transfer |
| US5703320A (en) * | 1996-01-18 | 1997-12-30 | The Ensign Bickford Company | Connector for blast initiation system |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8207301L (en) | 1983-07-01 |
| ZW26282A1 (en) | 1983-08-17 |
| SE8207301D0 (en) | 1982-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |