CA2333522A1 - Igniting the propellant charge powder in a plastic cartridge, especially for bolt-firing tools - Google Patents
Igniting the propellant charge powder in a plastic cartridge, especially for bolt-firing tools Download PDFInfo
- Publication number
- CA2333522A1 CA2333522A1 CA002333522A CA2333522A CA2333522A1 CA 2333522 A1 CA2333522 A1 CA 2333522A1 CA 002333522 A CA002333522 A CA 002333522A CA 2333522 A CA2333522 A CA 2333522A CA 2333522 A1 CA2333522 A1 CA 2333522A1
- Authority
- CA
- Canada
- Prior art keywords
- ignition
- charge powder
- propellent
- takes place
- igniting
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
- B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
- B25C1/16—Cartridges specially adapted for impact tools; Cartridge and bolts units
- B25C1/166—Pellets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
- B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
- B25C1/16—Cartridges specially adapted for impact tools; Cartridge and bolts units
- B25C1/163—Cartridges
Abstract
The invention relates to the igniting of the propellant charge powder (1) in a plastic cartridge, especially for bolt-firing tools. Said cartridge consists of a cup-shaped base part (2) with a cap (3), the propellant charge powder (1) being located in the base part (2). According to the invention, the propellant charge powder is ignited by an electrical discharge or by laser light (9) to ensure continuous fatigue-proof operation.
Description
IGNITING THE PROPELLANT CHARGE POWDER IN A PLASTIC
CARTRIDGE, ESPECIALLY FOR BOLT-FIRING TOOLS
The invention relates to ignition of the propellent-charge powder of a plastics cartridge, in particular for bolt-firing tools, according to the preamble of claim 1.
Provided that they use solid matter (propellent-charge powder) as propellent, the cartridges of bolt-firing tools on the market today are reacted by means of mechanical energy transmission (impact of a striking pin on the igniting mixture). The application of force, which is always necessary in this connection in order to tension the firing spring, is considered to be too wearing in continuous operation by the manufacturers of the bolt-firing tools.
Such a cartridge according to the prior art is known from DE 44 44 095 C2. It comprises a cup-shaped base portion, in which the propellent-charge powder is arranged, and a cover, which comprises a plurality of layers. The ignition takes place by way of a striking pin on an igniting composition arranged between the layers of the cover.
The underlying object of the invention is to improve ignition of the p:ropellent-charge powder of a plastics cartridge accordi;r~g to the preamble of claim 1, in such a way that said ignition is fatigue-proof in continuous operation.
This object is achieved i.n accordance with the invention as a re;~ult of the fact that the ignition takes place by means of an electric discharge or by means of laser light.
CARTRIDGE, ESPECIALLY FOR BOLT-FIRING TOOLS
The invention relates to ignition of the propellent-charge powder of a plastics cartridge, in particular for bolt-firing tools, according to the preamble of claim 1.
Provided that they use solid matter (propellent-charge powder) as propellent, the cartridges of bolt-firing tools on the market today are reacted by means of mechanical energy transmission (impact of a striking pin on the igniting mixture). The application of force, which is always necessary in this connection in order to tension the firing spring, is considered to be too wearing in continuous operation by the manufacturers of the bolt-firing tools.
Such a cartridge according to the prior art is known from DE 44 44 095 C2. It comprises a cup-shaped base portion, in which the propellent-charge powder is arranged, and a cover, which comprises a plurality of layers. The ignition takes place by way of a striking pin on an igniting composition arranged between the layers of the cover.
The underlying object of the invention is to improve ignition of the p:ropellent-charge powder of a plastics cartridge accordi;r~g to the preamble of claim 1, in such a way that said ignition is fatigue-proof in continuous operation.
This object is achieved i.n accordance with the invention as a re;~ult of the fact that the ignition takes place by means of an electric discharge or by means of laser light.
Both types of ignition are fatigue-proof and render possible a reliable ignition.
The ignition can act directly on the propellent-charge powder, or by way of an igniting composition. For this purpose, an igniting composition which can ignite the propellent-charge powder is advantageously arranged in the cartridge, on which igniting composition the ignition acts.
In this connect~'_on, the igniting composition can be arranged on the cover, or at the edge of the cartridge, between the base portion and the cover.
In a first advantageous embodiment, the ignition advantageously takes place by way of a high voltage generated, for example, by a piezoelectric crystal.
It is advantageous for the first pole for the ignition to be an electrically conductive spike stabbed through the cover, and t:or the other pole to be either a second electrically conductive spike or an adjacent metal block.
In an alternative advantageous embodiment, the ignition advantageously takes place by means of laser light, more precisely by means of a laser diode which is placed on the cover.
In this connection, the ignition can very suitably take place indirectly or directly.
Indirect ignition is distinguished by the fact that the ignition takes place by means of thermal excitation of one or more added substances (for example graphite) in the igniting composition or propellent-charge powder, the added substances having an absorption over a wide wavelength range.
Direct ignition is distinguished in that the ignition takes place by means of excitation of the molecules of the igniting composition or propellent-charge powder.
Irradiation takE:s place with laser light of precisely the wavelength that raises the molecules of the igniting composition or propellent-charge powder to the energy level at which exothermal disintegration takes place.
Further feature:> of the invention emerge from the figures, which are described in the following and in which:
Figure 1 shows an electrical ignition by way of two spikes and an igniting composition;
Figure 2 shows a.n elect.rical ignition by way of one spike and a metal block as second pole and an igniting composition;
Figure 3 shows a.n electrical ignition similar to Figure 1, but here the igniting composition is arranged in the centre of the cartridge;
Figure 4 shows a.n electrical ignites similar to Figure 3, but without the igniting composition;
Figure 5 shows a.n ignition by means of laser light, with there being' an igniting composition; and Figure 6 shows an ignition with laser light but without an igniting composition.
The ignition can act directly on the propellent-charge powder, or by way of an igniting composition. For this purpose, an igniting composition which can ignite the propellent-charge powder is advantageously arranged in the cartridge, on which igniting composition the ignition acts.
In this connect~'_on, the igniting composition can be arranged on the cover, or at the edge of the cartridge, between the base portion and the cover.
In a first advantageous embodiment, the ignition advantageously takes place by way of a high voltage generated, for example, by a piezoelectric crystal.
It is advantageous for the first pole for the ignition to be an electrically conductive spike stabbed through the cover, and t:or the other pole to be either a second electrically conductive spike or an adjacent metal block.
In an alternative advantageous embodiment, the ignition advantageously takes place by means of laser light, more precisely by means of a laser diode which is placed on the cover.
In this connection, the ignition can very suitably take place indirectly or directly.
Indirect ignition is distinguished by the fact that the ignition takes place by means of thermal excitation of one or more added substances (for example graphite) in the igniting composition or propellent-charge powder, the added substances having an absorption over a wide wavelength range.
Direct ignition is distinguished in that the ignition takes place by means of excitation of the molecules of the igniting composition or propellent-charge powder.
Irradiation takE:s place with laser light of precisely the wavelength that raises the molecules of the igniting composition or propellent-charge powder to the energy level at which exothermal disintegration takes place.
Further feature:> of the invention emerge from the figures, which are described in the following and in which:
Figure 1 shows an electrical ignition by way of two spikes and an igniting composition;
Figure 2 shows a.n elect.rical ignition by way of one spike and a metal block as second pole and an igniting composition;
Figure 3 shows a.n electrical ignition similar to Figure 1, but here the igniting composition is arranged in the centre of the cartridge;
Figure 4 shows a.n electrical ignites similar to Figure 3, but without the igniting composition;
Figure 5 shows a.n ignition by means of laser light, with there being' an igniting composition; and Figure 6 shows an ignition with laser light but without an igniting composition.
Figure 1 shows a plastics cartridge comprising a cup-shaped base portion 2, in which the propellent-charge powder 1 is arr~~nged, and a cover 3. The base portion 2 has a circumfe:rential collar, with an igniting composition 4 being arranged between the base portion 2 and the cover 3. The ignition takes place through the cover 3 having t.wo spikes 5, 6 made of electrically conductive material. A high voltage is applied to these spikes 5, &, for example by means of a piezoelectric crystal.
In Figure 2, instead of the second spike 6 in Figure l, an earthed metal block 7 is arranged underneath the collar and thus the igniting composition 4. Another spike can also additionally be located on the metal block 7.
In the embodiment of Figure 3, the igniting composition 4 is arranged in the centre of the cartridge. The igniting composition 4 can, for example, be arranged in a plastics cartridge directly above the propellent-charge powder 1 or deposited thereon.
In the embodiment of Figure 4, an igniting composition is not used. Two spikes 5, 6 are stabbed directly into the cover 3 or through the latter into the propellent-charge powder l, and a discharge is brought about between them.
In Figures 5 and 6, laser light 9 through the cover 3 ignites an igniting composition 4 (Figure 5) or the propellent-charge powder 1 directly (Figure 6). In order to do this, a laser diode 8 is preferably placed directly onto the cover 3.
In this connection, the ignition can take place in two ways, depending on the wavelength of the irradiated light:
1. Indirectly, by means of thermal excitation of one or more added substances (for example graphite), which have absorption over a wide wavelength range. These hot particles then ignite the igniting composition;
2. Directly, by means of excitation of the molecules of the ign_Lting composition. In this connection, irradiation takes place with laser light of precisely t;he wavelength that raises the molecules of the ign~_ting composition (for example potassium benzanate) to the energy level at which exothermal disintegration takes place (unimolecular, exothermal disintegration).
In Figure 2, instead of the second spike 6 in Figure l, an earthed metal block 7 is arranged underneath the collar and thus the igniting composition 4. Another spike can also additionally be located on the metal block 7.
In the embodiment of Figure 3, the igniting composition 4 is arranged in the centre of the cartridge. The igniting composition 4 can, for example, be arranged in a plastics cartridge directly above the propellent-charge powder 1 or deposited thereon.
In the embodiment of Figure 4, an igniting composition is not used. Two spikes 5, 6 are stabbed directly into the cover 3 or through the latter into the propellent-charge powder l, and a discharge is brought about between them.
In Figures 5 and 6, laser light 9 through the cover 3 ignites an igniting composition 4 (Figure 5) or the propellent-charge powder 1 directly (Figure 6). In order to do this, a laser diode 8 is preferably placed directly onto the cover 3.
In this connection, the ignition can take place in two ways, depending on the wavelength of the irradiated light:
1. Indirectly, by means of thermal excitation of one or more added substances (for example graphite), which have absorption over a wide wavelength range. These hot particles then ignite the igniting composition;
2. Directly, by means of excitation of the molecules of the ign_Lting composition. In this connection, irradiation takes place with laser light of precisely t;he wavelength that raises the molecules of the ign~_ting composition (for example potassium benzanate) to the energy level at which exothermal disintegration takes place (unimolecular, exothermal disintegration).
Claims (8)
1. Ignition of the propellent-charge powder (1) of a plastics cartridge, in particular for bolt-firing tools, the cartridge comprising a cup-shaped base portion (2) having a cover (3) and the propellent-charge powder (1) being arranged in the base portion (2), characterised in that the ignition takes place by means of an electric discharge or by means of laser light (9).
2. Ignition according to claim 1, characterised in that an igniting composition (4) which can ignite the propellent-charge powder (1) is arranged in the cartridge, on which igniting composition the ignition acts.
3. Ignition according to claim 2, characterised in that the igniting composition (4) is arranged on the cover (3), or at the edge of the cartridge, between the base portion (2) and the cover (3).
4. Ignition according to one of claims 1 to 3, characterised in that the ignition takes place by way of a high voltage, generated by a piezoelectric crystal, for example.
5. Ignition according to claim 4, characterised in that the first pole of the ignition is an electrically conductive spike (5) stabbed through the cover (3), and the other pole is either a second electrically conductive spike (6) or an adjacent metal block (7).
6. Ignition according to one of claims 1 to 3, characterised in that the ignition by means of laser light (9) takes place by means of a laser diode (8) which is placed on the cover (3).
7. Ignition according to claim 6, characterised in that the ignition takes place indirectly by means of thermal excitation of one or more added substances (for example graphite) in the igniting composition (4) or propellent-charge powder (1), the added substances having an absorption over a wide wavelength range.
8. Ignition according to claim 6, characterised in that the ignition takes place directly by means of excitation of the molecules of the igniting composition (4) or propellent-charge powder (1), with irradiation taking place with laser light (9) of precisely the wavelength that raises the molecules of the igniting composition (4) or propellent-charge powder (1) to the energy level at which exothermal disintegration takes place.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19824122.4 | 1998-05-29 | ||
| DE19824122A DE19824122A1 (en) | 1998-05-29 | 1998-05-29 | Ignition of the propellant powder of a plastic cartridge, especially for bolt-setting tools |
| PCT/EP1999/003298 WO1999062676A1 (en) | 1998-05-29 | 1999-05-14 | Igniting the propellant charge powder in a plastic cartridge, especially for bolt-firing tools |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2333522A1 true CA2333522A1 (en) | 1999-12-09 |
Family
ID=7869349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002333522A Abandoned CA2333522A1 (en) | 1998-05-29 | 1999-05-14 | Igniting the propellant charge powder in a plastic cartridge, especially for bolt-firing tools |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1082198B1 (en) |
| CN (1) | CN1144661C (en) |
| CA (1) | CA2333522A1 (en) |
| DE (2) | DE19824122A1 (en) |
| WO (1) | WO1999062676A1 (en) |
| ZA (1) | ZA200006341B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001040144A2 (en) * | 1999-12-03 | 2001-06-07 | Dynamit Nobel Gmbh | Ignition means for propellant powders |
| AR027705A1 (en) * | 2000-04-13 | 2003-04-09 | Dynamit Nobel Ag | A PROPULSING CARTRIDGE FOR PIROTECHNICAL IMPULSE DEVICES |
| FR2808718B1 (en) * | 2000-05-10 | 2002-08-16 | Hilti Ag | CARTRIDGE STORE FOR EXPLOSIVE SEALING TOOLS |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE364956C (en) * | 1918-12-19 | 1922-12-05 | Ernst Ludorf | Projectile that carries its propellant charge exclusively inside and is fired electrically |
| US2894457A (en) * | 1955-03-18 | 1959-07-14 | Magnavox Co | Detonation delay device |
| BE556596A (en) * | 1956-04-30 | |||
| NL263527A (en) * | 1960-05-09 | |||
| DE1678199A1 (en) * | 1968-01-09 | 1971-12-30 | Dynamit Nobel Ag | Charging slots for drive cartridges for devices for commercial use |
| DE2446682A1 (en) * | 1973-02-02 | 1976-04-08 | Hilti Ag | MAGAZINE TO PICK UP CARTRIDGES |
| CH602283A5 (en) * | 1974-09-30 | 1978-07-31 | Hilti Ag | |
| DE3542447C2 (en) * | 1985-11-30 | 1993-11-18 | Diehl Gmbh & Co | Laser-sensitive ignition mixture |
| US4898095A (en) * | 1986-10-20 | 1990-02-06 | Nippon Oil And Fats Company, Limited And Kajima Corporation | Laser beam-detonatable blasting cap |
| US4819562A (en) * | 1987-01-02 | 1989-04-11 | Bowman E W | Explosive charge containing magazine for ram setting gun |
| DE3909952A1 (en) * | 1989-03-25 | 1990-09-27 | Dynamit Nobel Ag | Fuze/detonator which can be initiated by a laser |
| DE3910392A1 (en) * | 1989-03-31 | 1990-10-04 | Hilti Ag | TAPE LOADING STRIP |
| US5138946A (en) * | 1991-06-21 | 1992-08-18 | Mcdonnell Douglas Corporation | Laser diode apparatus for initiation of explosive devices |
| US5266132A (en) * | 1991-10-08 | 1993-11-30 | The United States Of America As Represented By The United States Department Of Energy | Energetic composites |
| GB2267330A (en) * | 1992-05-23 | 1993-12-01 | Secr Defence | Laser ignition of gas generators |
| DE4444095C2 (en) * | 1994-12-10 | 1997-12-18 | Rheinmetall Ind Ag | Band-shaped loading strip for bolt-setting tools |
| DE4444096C2 (en) * | 1994-12-10 | 1997-10-09 | Rheinmetall Ind Ag | Band-shaped loading strip for bolt-setting tools |
-
1998
- 1998-05-29 DE DE19824122A patent/DE19824122A1/en not_active Withdrawn
-
1999
- 1999-05-14 CA CA002333522A patent/CA2333522A1/en not_active Abandoned
- 1999-05-14 WO PCT/EP1999/003298 patent/WO1999062676A1/en active IP Right Grant
- 1999-05-14 EP EP99923590A patent/EP1082198B1/en not_active Expired - Lifetime
- 1999-05-14 CN CNB998065250A patent/CN1144661C/en not_active Expired - Fee Related
- 1999-05-14 DE DE59906780T patent/DE59906780D1/en not_active Expired - Lifetime
-
2000
- 2000-11-06 ZA ZA200006341A patent/ZA200006341B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP1082198B1 (en) | 2003-08-27 |
| DE19824122A1 (en) | 1999-12-02 |
| WO1999062676A1 (en) | 1999-12-09 |
| DE59906780D1 (en) | 2003-10-02 |
| CN1302246A (en) | 2001-07-04 |
| EP1082198A1 (en) | 2001-03-14 |
| CN1144661C (en) | 2004-04-07 |
| ZA200006341B (en) | 2001-05-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |