US1959479A - Firing device - Google Patents
Firing device Download PDFInfo
- Publication number
- US1959479A US1959479A US548470A US54847031A US1959479A US 1959479 A US1959479 A US 1959479A US 548470 A US548470 A US 548470A US 54847031 A US54847031 A US 54847031A US 1959479 A US1959479 A US 1959479A
- Authority
- US
- United States
- Prior art keywords
- circuit
- terminals
- fuses
- voltage
- parallel
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
Definitions
- Patented 22 rase HIRING DEVICE .lcrzy Kielczewski, Stary-Bierun, Poland, assigner to Lignoza Splka Akcyjna, Katowice, Poland Application ⁇ luly 2, 1931, Serial No. 548,470 ln Germany July 23, 1930 Y l Claim.
- the invention consists in this that a device arranged in parallel with the ignitng circuit in terrupts the auxiliary circuit when a current passes, so that an increased voltage then occurs at the terminals of the fuse. It is thus possible ywith this arrangement to fire simultaneously a larger number of fuses than is otherwiseY possible, or if an igniting machine is otherwise too Weak for a single fuse it is possible for this to be ignited according to the invention.
- the safety device may consist either of a resistance wire or a circuit breaker, or a circuit breaker with an inductance coil, or an inductance coil with a resistance in series, or an inductance coil with a resistance in parallel.
- the resistance wire isarranged near the fuse, it has, at the same time, the action of the short circuiting wire in operation by hand.
- Fig. 1 is a diagrammatic view of one form of the invention
- Fig. 2 is a fragmentary view of a modification thereof
- Fig. 3 is a diagrammatic View of a third form of the invention.
- FIGs. 4, 5 and 6 are fragmentary diagrams of further modifications of the invention.
- Fig. 2 shows the circuit breaker 8, which is applied to the terminals 6, 6. This may be a circuit breaker which is operated electromagnetically or otherwise.
- an inductance coil 7 may be placed in series with this circuit breaker 8, the coil, as well as the circuit breaker 8, being applied to the terminals 6, 6. The desired effect is increased by the presence of this inductance coil.
- Fig. 4 shows an inductance coil "I, which is in parallel with the resistance wire 4 and Fig. 5 shows an inductance coil '7 in series with a resistance 4 attached to the terminals 6, 6'.
- the resistance wire is not attached to the terminals 6, 6 but is placed near to the fuse as is shown by Way of example in Fig. 6, the resistance 4' being attached to the terminals 5, 5', also performs the function of the short circuit Wire. It is known that for security against stray currents conductors are placed in parallel vwith and r near to the fuses, which give protection from stray currents during the time of preparation and are removed by hand immediately before firing. This removal by hand is not required in this case and is obtained automatically by the resistance wire 4 being melted when a certain voltage is reached.
- the safety device according to the invention has been described as being in parallel with the ignition circuit, but there are cases in which the device may be arranged in series with the fuses; this is possible, for example, when the circuit breakers or inductance coils in parallel with the resistance Wire are used.
- the device may either be enclosed with non-combustible material, as is advantageous, for instance with the metal wire, or
- a circuit for ignition machines comprising a fuse circuit and an auxiliary circuit parallel thereto, and a device in said auxiliary circuit adapted to interrupt the latter when a current passes causing an increased voltage at the fuse terminals, said device including a circuit breaker with an inductance coil.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fuses (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Description
22, 1934. .1. KlELczl-:wsm 1,959,479
FIRING DEVICE Filed July 2, 1931 59.4 f/fg W num 6.,
Cil
Patented 22, rase HIRING DEVICE .lcrzy Kielczewski, Stary-Bierun, Poland, assigner to Lignoza Splka Akcyjna, Katowice, Poland Application `luly 2, 1931, Serial No. 548,470 ln Germany July 23, 1930 Y l Claim.
It is known that creeping currents in mines only have a limited voltage so that fuses which do not react to th's voltage are quite safe from creeping currents. For firing such fuses with igniting machines, however, a comparatively high voltage is required which is undesirable for other reasons, or if the permissible voltage is not to be exceeded it is only possible to re with one igniting machine a Very limited number of fuses. often not as many as are required.
The inventionconsists in this that a device arranged in parallel with the ignitng circuit in terrupts the auxiliary circuit when a current passes, so that an increased voltage then occurs at the terminals of the fuse. It is thus possible ywith this arrangement to fire simultaneously a larger number of fuses than is otherwiseY possible, or if an igniting machine is otherwise too Weak for a single fuse it is possible for this to be ignited according to the invention.
The safety device may consist either of a resistance wire or a circuit breaker, or a circuit breaker with an inductance coil, or an inductance coil with a resistance in series, or an inductance coil with a resistance in parallel.
If, according to a further form of the invention, the resistance wire isarranged near the fuse, it has, at the same time, the action of the short circuiting wire in operation by hand.
The accompanying drawing illustrates various forms of the arrangement, in which,
Fig. 1 is a diagrammatic view of one form of the invention,
Fig. 2 is a fragmentary view of a modification thereof,
Fig. 3 is a diagrammatic View of a third form of the invention, and,
Figs. 4, 5 and 6 are fragmentary diagrams of further modifications of the invention.
As shown in Fig. l, from the terminals of the igniting machine 1 two conductors 3, 3' go to the fuse or fuses 2, several of which connected in series are shown in the drawing. At the terminals 6, 6' alresistance wire 4 is arranged in parallel, which is of such a size that immediately before the ignition it is destroyed by burning out, melting, or in a similar manner. On account of this burning out, the voltage of the ignition circuit is so increased that the fuses are ignited. The voltage at which the resistance wire melts is considerably lower than that required for firing the fuses.
Instead of the resistance wire 4 other devices producing the same eiect may be applied to the terminals 6, 6'. Thus Fig. 2 shows the circuit breaker 8, which is applied to the terminals 6, 6. This may be a circuit breaker which is operated electromagnetically or otherwise.
According to Fig. 3 an inductance coil 7 may be placed in series with this circuit breaker 8, the coil, as well as the circuit breaker 8, being applied to the terminals 6, 6. The desired effect is increased by the presence of this inductance coil.
Fig. 4 shows an inductance coil "I, which is in parallel with the resistance wire 4 and Fig. 5 shows an inductance coil '7 in series with a resistance 4 attached to the terminals 6, 6'.
If the resistance wire is not attached to the terminals 6, 6 but is placed near to the fuse as is shown by Way of example in Fig. 6, the resistance 4' being attached to the terminals 5, 5', also performs the function of the short circuit Wire. It is known that for security against stray currents conductors are placed in parallel vwith and r near to the fuses, which give protection from stray currents during the time of preparation and are removed by hand immediately before firing. This removal by hand is not required in this case and is obtained automatically by the resistance wire 4 being melted when a certain voltage is reached.
In the foregoing the safety device according to the invention has been described as being in parallel with the ignition circuit, but there are cases in which the device may be arranged in series with the fuses; this is possible, for example, when the circuit breakers or inductance coils in parallel with the resistance Wire are used.
In mines containing fire damp in which` there is danger from the burning of the resistance wire or the breaking of the circuit on account of the formation of sparks, the device may either be enclosed with non-combustible material, as is advantageous, for instance with the metal wire, or
it can be enclosed so as to exclude re damp which is most advantageous with circuit breakers.
What I claim is:
A circuit for ignition machines comprising a fuse circuit and an auxiliary circuit parallel thereto, and a device in said auxiliary circuit adapted to interrupt the latter when a current passes causing an increased voltage at the fuse terminals, said device including a circuit breaker with an inductance coil.
JERZY KIELCZEWSKI.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1959479X | 1930-07-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1959479A true US1959479A (en) | 1934-05-22 |
Family
ID=7782014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US548470A Expired - Lifetime US1959479A (en) | 1930-07-23 | 1931-07-02 | Firing device |
Country Status (1)
Country | Link |
---|---|
US (1) | US1959479A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2583839A (en) * | 1949-05-27 | 1952-01-29 | Seismograph Service Corp | Cap connecting box |
US3180262A (en) * | 1962-08-13 | 1965-04-27 | Texaco Experiment Inc | Electric initiator |
US3209693A (en) * | 1962-02-14 | 1965-10-05 | Norris Thermador Corp | Piezo-electric fuze assembly with bleed resistor |
US4369707A (en) * | 1978-07-12 | 1983-01-25 | Daimler-Benz Aktiengesellschaft | Short circuit fuse for electrical igniters |
US4712477A (en) * | 1985-06-10 | 1987-12-15 | Asahi Kasei Kogyo Kabushiki Kaisha | Electronic delay detonator |
US4904196A (en) * | 1987-07-17 | 1990-02-27 | Yazaki Corporation | Releasable connector for electric circuits |
US4993322A (en) * | 1987-08-14 | 1991-02-19 | Thomson-Brandt Armements | Device for selection and triggering of firing circuit |
-
1931
- 1931-07-02 US US548470A patent/US1959479A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2583839A (en) * | 1949-05-27 | 1952-01-29 | Seismograph Service Corp | Cap connecting box |
US3209693A (en) * | 1962-02-14 | 1965-10-05 | Norris Thermador Corp | Piezo-electric fuze assembly with bleed resistor |
US3180262A (en) * | 1962-08-13 | 1965-04-27 | Texaco Experiment Inc | Electric initiator |
US4369707A (en) * | 1978-07-12 | 1983-01-25 | Daimler-Benz Aktiengesellschaft | Short circuit fuse for electrical igniters |
US4712477A (en) * | 1985-06-10 | 1987-12-15 | Asahi Kasei Kogyo Kabushiki Kaisha | Electronic delay detonator |
US4904196A (en) * | 1987-07-17 | 1990-02-27 | Yazaki Corporation | Releasable connector for electric circuits |
US4993322A (en) * | 1987-08-14 | 1991-02-19 | Thomson-Brandt Armements | Device for selection and triggering of firing circuit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1959479A (en) | Firing device | |
KR840009017A (en) | Current breaker | |
DE19929922A1 (en) | Fuse device for circuit breaking and fire prevention when a vehicle abnormality, e.g. collision, occurs, comprises a solid propellant which can be ignited and displaced towards a low melting element in an electrical circuit | |
US2703053A (en) | Firing circuit for perforating guns | |
AU528369B2 (en) | Safety circuit for fuze | |
US4489301A (en) | High voltage, high current fuse with combustion assisted operation | |
DE19749133A1 (en) | Emergency circuit breaker with rapid action for vehicle | |
US2727110A (en) | Time-delay motor protective fuse | |
DE1022140B (en) | Electric safety switch for mines | |
US1677692A (en) | Electrical cut-out | |
US1868224A (en) | Julius scbrttrmaun | |
US2428334A (en) | Protective device for blasting circuit | |
US2338946A (en) | Device for interrupting overloads | |
AT156764B (en) | Protective device for electrical machines and devices with high rated currents. | |
SU96952A1 (en) | High voltage fuse | |
DE1056249B (en) | Device for the rapid interruption of short-circuit currents | |
DE668300C (en) | Electrical safety device for large currents | |
AT201488B (en) | Electric safety igniter for mines | |
US1956839A (en) | Electric fuse | |
DE300730C (en) | ||
DE510868C (en) | Bullet protection | |
GB987386A (en) | Current limiting fuse with a striker pin | |
SU524248A1 (en) | Fuse | |
DE714009C (en) | Protection circuit for electrical devices and apparatus | |
US1395046A (en) | Automatic circuit-controlling apparatus |