US3754510A - Propellant charge for devices used industrially - Google Patents
Propellant charge for devices used industrially Download PDFInfo
- Publication number
- US3754510A US3754510A US00872809A US3754510DA US3754510A US 3754510 A US3754510 A US 3754510A US 00872809 A US00872809 A US 00872809A US 3754510D A US3754510D A US 3754510DA US 3754510 A US3754510 A US 3754510A
- Authority
- US
- United States
- Prior art keywords
- propellant
- propellant charge
- charge
- recess
- primer substance
- 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 - Lifetime
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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
- B25C1/082—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a pellet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S102/00—Ammunition and explosives
- Y10S102/70—Combustilbe cartridge
Definitions
- PROPELLANT CHARGE FOR DEVICES USED INDUSTRIALLY Inventors: Giinther Marondel, Eriere;
- the present invention relates to a caseless propellant charge for devices used industrially for example, stud driving tools.
- a body of propellant powder having preferably a central recess extending therethrough is provided with a percussion-sensitive primer mass disposed in said recess.
- caseless propellant charges wherein, in the zone of a preferably central recess of a formed or cast body made of a suitable propellant powder, a precussion-ignitable powder charge is provided.
- a necessary prerequisite is a device with a specific construction, namely a device wherein the receptacle, housing the propellant charge, and the firing or striker pin are of such a structure, or cooperate with each other in such a manner, that the primer substance by itself is compressed or compacted between the striker pin and a solid (fixed) abutment.
- the compression extends beyond that corresponding to the axial compression of the propellant charge by the percussion energy customary in this kind of device.
- the primer subs ance in addition to the compression of the entire propellant charge effected by the percussion energy customary in the device, is also subjected toan additional compression or compacting, leading'up to and exceeding the value required for the ignition and thus resulting in ignition.
- the recess of the propellant powder body is completely filled with the primer substance.
- the complete filling of the recess of the propellant powder body with the primer substance is also advantageous insofar as it ensures, without any special measures, that the primer substance is always disposed in an even and uniform level over the entire cross section of the recess, even in the case of a very loose compaction, independent of the respective position of the propellant charge. Accordingly, the same conditions are created for ignition of the propellant charge over the entire cross section.
- the minimum value of axial compression necessary for triggering the ignition can be selected to be a high value. In the interest of as great a safety margin as possible,this value is chosen to be very high, for example, at least 80 percent.
- Such a high degree of compression or a corresponding amount of compacting also produces the advantage that the mechanical abutment provided for the intended pure percussionignition is especially effective as an anvil, i.e., for utilizing the percussion energy for the ignition of the propellant charge.
- Suitable for the percussion-sensitive primer substance are conventional materials or mixtures of said materials known for this purpose.
- an intimate'mixture of tetrazene and nitrocellulose is preferably employed, which mixture can be varied or adjusted within very wide limits, by correspondingly dimensioning the percentage proportions of the two components, with respect to their percussion sensitivity.
- the percussion sensitivity is preferably employed, which mixture can be varied or adjusted within very wide limits, by correspondingly dimensioning the percentage proportions of the two components, with respect to their percussion sensitivity.
- the propellant which canbe used in the present invention includes for example, non-gelatinized nitrocellulose which can be pressed into a highly compacted propellant powder body.
- the propellant powder body can also be made of a gelatinized propellant, for example gelatinized nitrocellulose, by the extrusion method; This has the advantageof being simple and inexpen' sive.
- the propellant powder body can also be a porous or a non-porous propellant cemented with an organic binder which leaves no residue upon deflagration.
- FIG. 1 shows a propellant charge in an axial, sectional view
- FIG. 2 shows a device for igniting the propellant charge in the opened condition
- FIG. 3 shows the device in the closed condition.
- the propellant charge of FIG. 1 comprises the annular propellant powder body 1 which is cast or pressed (formed) from the propellant, or produced with the use of a conventional organic binder, for example an epoxy resin, which burns without leaving any residue.
- the primer substance 2 completely fills the annular inside cross section.
- the ratio of compressibility of propellant to primer substance is about 1:10 to l:l,000.
- the primer substance upon a sudden axial compression of the propellant charge effected with the use of percussion energy which is customary when employing devices for industrial usage, for example when using stud driving tools, the primer substance experiences only a relatively minor compacting, which is not yet sufi'lcient for ignition. Therefore a further compacting of the primer substance is necessary.
- the powder foil 9, covering at least the inside cross-section can be provided. It is also possible to varnish the end face with a suitable material which burns without leaving a residue.
- Elements 3 and 4 of FIGS. 2 and 3 are parts of a stud driving tool which is not shown in detail, operating in accordance with the so-called thrust piston principle.
- the recess 5, which serves as the support for the propellant charge is likewise adapted to the dimensions of the propellant charges being employed.
- the cylindrical extention 7 of element 4 is dimensioned so that it is adapted to the dimensions of the propellant charges being employed, as well as to the dimensions of the recess 5. Accordingly, as seen in FIG.
- the closed annular space 8 results, into which the propellant power bodyI-I of an inserted propellant charge is pressed whenat'h'e'zdevice is closed.
- a caseless consumable propellant charge for industrial use which comprises a body of a propellant powder having a recess disposed through a substantial portion of said body, said recess being substantially filled with a percussion-sensitive primer substance, said primer substance having a compressibility greater than the compressibility of the body of said propellant powder whereby a sudden unexpected compression of the propellant charge in the direction of the axis of the recess, and the resultant compacting of the primer substance remains below that value of compression required for ignition thereof, the ratio of the compressibility of said propellant powder to said primer substance being about 1:10 to 121,000 and the compression value required for ignition is reached only after an axial compression of said primer substance of at least about percent.
Abstract
The present disclosure is directed to a propellant charge for industrial use which comprises a body of a propellant powder having a centrally disposed recess extending therethrough, said recess containing a percussion sensitive primer substance, said primer substance being housed in the recess in such a manner that the compacting of the primer substance remains below the value required for the ignition thereof upon a sudden unexpected compression of the propellant charge in the direction of the axis of the recess.
Description
United States Patent 1 Marondel et a1.
PROPELLANT CHARGE FOR DEVICES USED INDUSTRIALLY Inventors: Giinther Marondel, Erlangen;
Heinz Gawlick, Furth; Werner Siegelin, Stein, all of Germany Assignee: Dynamlt Nobel AG, Troisdorf,
Germany Filed: Oct. 31, 1969 App]. No.: 872,809
Foreign Application Priority Data Oct. 26, 1968 Germany P 18 05 359.3
[1.8. CI 102/101, 102/45, l02/D1G. 1 Int. Cl ..F42b 1/00 Field of Search 102/101, 99, 39,
102/104, 105, DIG. 5; 89/7 [111 3,754,510 [451 Aug. 28, 1973 [56] References Cited UNITED STATES PATENTS 3,580,180 5/1971 Gawlick et al 102/45 Primary Examiner-Robert F. Stahl Attorney-Craig, Antonelli and Hill [57] ABSTRACT 9 Claims, 3 Drawing Figures PATENIEmusze ms 3.754.510
FIG. I
FIG. 3
8 l Q l 1 H INVENTORS GUNTHER MARONDEL HEINZ GAWLICK WERNER SIEGELIN d M-MLZJ MWM ATTORNEYS PROPELLANT CHARGE FOR DEVICES USED INDUSTRIALLY BACKGROUND OF THE INVENTION The present invention relates to a caseless propellant charge for devices used industrially for example, stud driving tools. According to the present invention, a body of propellant powder having preferably a central recess extending therethrough is provided with a percussion-sensitive primer mass disposed in said recess.
In order to avoid the splintering and rupturing effects observed in cartridges having a propellant or primer charge housed in a casing made for example, of a metal, which effects occur on the wall of the cartridge case, it is well known to employ caseless propellant charges wherein, in the zone of a preferably central recess of a formed or cast body made of a suitable propellant powder, a precussion-ignitable powder charge is provided.
SUMMARY OF THE INVENTION only, since various changes and modifications within the spirit and scope of the invention will become apparent .to those skilled in the art from this detailed description.
Pursuant to thepresent invention, it has been found that the abovementioned disadvantages may be elimi named and a much improved caseless propellant charge may be obtained by providing that the primer sub-v stance is accommodated in the recess of the propellant powder body in such a manner that the compacting (condensing) of the primer substance remains below the value required for the ignition thereof upon a sudden compression of the propellant charge in the direction of the axis of the recess. The compression is effected by the use of percussion energy which is customary in these devices and is at least approximately uniform over the entire cross section.
The fact that the desired high degree of safety against inadvertent ignition is obtained by constructing the propellant charge in accordance with the present invention can be seen unequivocally from the aspect that, for igniting the propellant charge, a necessary prerequisite is a device with a specific construction, namely a device wherein the receptacle, housing the propellant charge, and the firing or striker pin are of such a structure, or cooperate with each other in such a manner, that the primer substance by itself is compressed or compacted between the striker pin and a solid (fixed) abutment. The compression extends beyond that corresponding to the axial compression of the propellant charge by the percussion energy customary in this kind of device. Alternatively, the primer subs ance, in addition to the compression of the entire propellant charge effected by the percussion energy customary in the device, is also subjected toan additional compression or compacting, leading'up to and exceeding the value required for the ignition and thus resulting in ignition.
- However, in addition to the above, a high degree of safety against unintended ignition is also obtained by the fact that the forces occuring in the operation of these devices are substantiallygreater than those to which the propellant charge is exposed externally of the devices. External forcesmight include, for example, an inadvertent blow with a hammer on a propellant charge lying around the area, or inadvertently stepping on a dropped propellant charge, etc. Accordingly, the forces produced in the devices of the present invention are greater than required for safety reasons.
Advantageously, the recess of the propellant powder body is completely filled with the primer substance. This simplifies things, especially from a manufacturing point of view, since it is possible to prevent the primer substance from falling out, by applying a uniform, thin varnish coating on the end faces to seal the same. The complete filling of the recess of the propellant powder body with the primer substance is also advantageous insofar as it ensures, without any special measures, that the primer substance is always disposed in an even and uniform level over the entire cross section of the recess, even in the case of a very loose compaction, independent of the respective position of the propellant charge. Accordingly, the same conditions are created for ignition of the propellant charge over the entire cross section.
lncorrespondence with the respective requirements and in accordance with the materials employed for the propellant powder body as well as the primer substance, the minimum value of axial compression necessary for triggering the ignition can be selected to be a high value. In the interest of as great a safety margin as possible,this value is chosen to be very high, for example, at least 80 percent. Such a high degree of compression or a corresponding amount of compacting also produces the advantage that the mechanical abutment provided for the intended pure percussionignition is especially effective as an anvil, i.e., for utilizing the percussion energy for the ignition of the propellant charge.
Suitable for the percussion-sensitive primer substance are conventional materials or mixtures of said materials known for this purpose. However, according to the present invention, an intimate'mixture of tetrazene and nitrocellulose is preferably employed, which mixture can be varied or adjusted within very wide limits, by correspondingly dimensioning the percentage proportions of the two components, with respect to their percussion sensitivity. The percussion sensitivity,
as found by experimentation, is at least as large or larger than the percussion sensitivity of the indivudual components. This makes it possible, in an advantageous manner, to effectively adapt to the respective propellant employed, with respect to the percussion and ignition sensitivity of the primer substance. I
The propellant which canbe used in the present invention includes for example, non-gelatinized nitrocellulose which can be pressed into a highly compacted propellant powder body. The propellant powder body can also be made of a gelatinized propellant, for example gelatinized nitrocellulose, by the extrusion method; This has the advantageof being simple and inexpen' sive. The propellant powder body can also be a porous or a non-porous propellant cemented with an organic binder which leaves no residue upon deflagration.
BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only and thus are not limitative of the present invention and wherein:
FIG. 1 shows a propellant charge in an axial, sectional view;
FIG. 2 shows a device for igniting the propellant charge in the opened condition; and
FIG. 3 shows the device in the closed condition.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, the propellant charge of FIG. 1 comprises the annular propellant powder body 1 which is cast or pressed (formed) from the propellant, or produced with the use of a conventional organic binder, for example an epoxy resin, which burns without leaving any residue. The primer substance 2 completely fills the annular inside cross section. In this connection, the ratio of compressibility of propellant to primer substance is about 1:10 to l:l,000. Thus, it can be seen that, upon a sudden axial compression of the propellant charge effected with the use of percussion energy which is customary when employing devices for industrial usage, for example when using stud driving tools, the primer substance experiences only a relatively minor compacting, which is not yet sufi'lcient for ignition. Therefore a further compacting of the primer substance is necessary. In order to prevent the primer substance from inadvertently dropping out of the propellant powder body, the powder foil 9, covering at least the inside cross-section, can be provided. It is also possible to varnish the end face with a suitable material which burns without leaving a residue.
What is climedis:
l. A caseless consumable propellant charge for industrial use which comprises a body of a propellant powder having a recess disposed through a substantial portion of said body, said recess being substantially filled with a percussion-sensitive primer substance, said primer substance having a compressibility greater than the compressibility of the body of said propellant powder whereby a sudden unexpected compression of the propellant charge in the direction of the axis of the recess, and the resultant compacting of the primer substance remains below that value of compression required for ignition thereof, the ratio of the compressibility of said propellant powder to said primer substance being about 1:10 to 121,000 and the compression value required for ignition is reached only after an axial compression of said primer substance of at least about percent.
2. The propellant charge of claim 1, whrein a powder foil covers the recess to prevent the primer substance from inadvertently dropping out of the propellant powder body.
3. The propellant charge of claim 1, wherein a varnish coating is-provided at the end face of the charge.
4. The propellant charge according to claim I, wherein the percussion-sensitive primer substance contains an intimate mixture of tetrazene and nitrocellulose.
5. The propellant charge of claim 1, wherein the propellant powder body contains non-gelantinized, highly compacted nitrocellulose.
6. The propellant charge according to claim 1, wherein the propellant powder body contains an extruded a gelantinized propellant.
7. The propellant charge according to claim 1, wherein the propellant powder body contains a porous propellant cemented with organic binder which burns without leaving a residue.
8. A stud driving tool containing the propellant charge of claim I.
9. The propellant charge of claim I, wherein said recess is centrally located within and extends through said body of propellant powder.
Claims (8)
- 2. The propellant charge of claim 1, whrein a powder foil covers the recess To prevent the primer substance from inadvertently dropping out of the propellant powder body.
- 3. The propellant charge of claim 1, wherein a varnish coating is provided at the end face of the charge.
- 4. The propellant charge according to claim 1, wherein the percussion-sensitive primer substance contains an intimate mixture of tetrazene and nitrocellulose.
- 5. The propellant charge of claim 1, wherein the propellant powder body contains non-gelantinized, highly compacted nitrocellulose.
- 6. The propellant charge according to claim 1, wherein the propellant powder body contains an extruded a gelantinized propellant.
- 7. The propellant charge according to claim 1, wherein the propellant powder body contains a porous propellant cemented with organic binder which burns without leaving a residue.
- 8. A stud driving tool containing the propellant charge of claim
- 9. The propellant charge of claim 1, wherein said recess is centrally located within and extends through said body of propellant powder.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681805359 DE1805359A1 (en) | 1968-10-26 | 1968-10-26 | Propellant for devices for commercial use |
Publications (1)
Publication Number | Publication Date |
---|---|
US3754510A true US3754510A (en) | 1973-08-28 |
Family
ID=5711591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00872809A Expired - Lifetime US3754510A (en) | 1968-10-26 | 1969-10-31 | Propellant charge for devices used industrially |
Country Status (16)
Country | Link |
---|---|
US (1) | US3754510A (en) |
JP (1) | JPS4840000B1 (en) |
AT (1) | AT305169B (en) |
BE (1) | BE740681A (en) |
CA (1) | CA919432A (en) |
DE (1) | DE1805359A1 (en) |
DK (1) | DK125236B (en) |
ES (1) | ES372872A1 (en) |
FI (1) | FI50939C (en) |
FR (1) | FR2022313A1 (en) |
GB (1) | GB1293803A (en) |
IL (1) | IL33100A (en) |
NL (1) | NL6914487A (en) |
NO (1) | NO122738B (en) |
PL (1) | PL80569B1 (en) |
RO (1) | RO56417A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4014963A (en) * | 1970-07-18 | 1977-03-29 | Dynamit Nobel Aktiengesellschaft | Molding a primer charge within a caseless propellant charge |
US4710329A (en) * | 1978-09-12 | 1987-12-01 | Basset Bretagne Loire - B.B.L. | Method of manufacturing articles of compacted powder |
US5269224A (en) * | 1990-08-30 | 1993-12-14 | Olin Corporation | Caseless utilized ammunition charge module |
US5322660A (en) * | 1990-04-23 | 1994-06-21 | Miller Construction Limited | Method of laminating glass |
US5726378A (en) * | 1996-04-01 | 1998-03-10 | Hodgdon Powder Company, Inc. | Unitary propellant charge for muzzle loading firearms |
US6688232B2 (en) | 2001-12-31 | 2004-02-10 | Legend Products Corporation | Compressed powder charge for muzzleloader and black powder firearms |
US7344610B2 (en) | 2003-01-28 | 2008-03-18 | Hodgdon Powder Company, Inc. | Sulfur-free propellant compositions |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3580180A (en) * | 1967-09-19 | 1971-05-25 | Dynamit Nobel Ag | Consumable industrial propellant cartridge |
-
1968
- 1968-10-26 DE DE19681805359 patent/DE1805359A1/en active Granted
-
1969
- 1969-09-23 FI FI692714A patent/FI50939C/en active
- 1969-09-24 NL NL6914487A patent/NL6914487A/xx unknown
- 1969-09-30 IL IL33100A patent/IL33100A/en unknown
- 1969-10-03 RO RO61176A patent/RO56417A/ro unknown
- 1969-10-14 NO NO4094/69A patent/NO122738B/no unknown
- 1969-10-23 FR FR6936432A patent/FR2022313A1/fr not_active Withdrawn
- 1969-10-23 CA CA065673A patent/CA919432A/en not_active Expired
- 1969-10-23 BE BE740681D patent/BE740681A/xx unknown
- 1969-10-24 DK DK564369AA patent/DK125236B/en unknown
- 1969-10-24 AT AT1005269A patent/AT305169B/en not_active IP Right Cessation
- 1969-10-25 PL PL1969136501A patent/PL80569B1/pl unknown
- 1969-10-25 ES ES372872A patent/ES372872A1/en not_active Expired
- 1969-10-27 GB GB52607/69A patent/GB1293803A/en not_active Expired
- 1969-10-27 JP JP44085953A patent/JPS4840000B1/ja active Pending
- 1969-10-31 US US00872809A patent/US3754510A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3580180A (en) * | 1967-09-19 | 1971-05-25 | Dynamit Nobel Ag | Consumable industrial propellant cartridge |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4014963A (en) * | 1970-07-18 | 1977-03-29 | Dynamit Nobel Aktiengesellschaft | Molding a primer charge within a caseless propellant charge |
US4710329A (en) * | 1978-09-12 | 1987-12-01 | Basset Bretagne Loire - B.B.L. | Method of manufacturing articles of compacted powder |
US5322660A (en) * | 1990-04-23 | 1994-06-21 | Miller Construction Limited | Method of laminating glass |
US5269224A (en) * | 1990-08-30 | 1993-12-14 | Olin Corporation | Caseless utilized ammunition charge module |
US5726378A (en) * | 1996-04-01 | 1998-03-10 | Hodgdon Powder Company, Inc. | Unitary propellant charge for muzzle loading firearms |
US6688232B2 (en) | 2001-12-31 | 2004-02-10 | Legend Products Corporation | Compressed powder charge for muzzleloader and black powder firearms |
US7344610B2 (en) | 2003-01-28 | 2008-03-18 | Hodgdon Powder Company, Inc. | Sulfur-free propellant compositions |
Also Published As
Publication number | Publication date |
---|---|
GB1293803A (en) | 1972-10-25 |
RO56417A (en) | 1974-07-01 |
DE1805359A1 (en) | 1970-05-27 |
DK125236B (en) | 1973-01-22 |
IL33100A0 (en) | 1970-05-21 |
FI50939B (en) | 1976-05-31 |
FI50939C (en) | 1976-09-10 |
CA919432A (en) | 1973-01-23 |
AT305169B (en) | 1973-02-12 |
IL33100A (en) | 1973-08-29 |
BE740681A (en) | 1970-04-01 |
PL80569B1 (en) | 1975-08-30 |
ES372872A1 (en) | 1971-11-01 |
JPS4840000B1 (en) | 1973-11-28 |
NL6914487A (en) | 1970-04-28 |
NO122738B (en) | 1971-08-02 |
FR2022313A1 (en) | 1970-07-31 |
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