US2791962A - Rocket igniter - Google Patents
Rocket igniter Download PDFInfo
- Publication number
- US2791962A US2791962A US280720A US28072052A US2791962A US 2791962 A US2791962 A US 2791962A US 280720 A US280720 A US 280720A US 28072052 A US28072052 A US 28072052A US 2791962 A US2791962 A US 2791962A
- Authority
- US
- United States
- Prior art keywords
- cup
- charge
- box
- igniting
- hollow body
- 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
- 239000000843 powder Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- FZZMTSNZRBFGGU-UHFFFAOYSA-N 2-chloro-7-fluoroquinazolin-4-amine Chemical compound FC1=CC=C2C(N)=NC(Cl)=NC2=C1 FZZMTSNZRBFGGU-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 235000002020 sage Nutrition 0.000 description 1
Images
Classifications
-
- 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
- F42C19/12—Primers; Detonators electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/95—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by starting or ignition means or arrangements
-
- 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
- F42B3/12—Bridge initiators
- F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
Definitions
- Rocket-motors are already known which comprise a hollow body for receiving a combustible propellent charge formed by a plurality of powder grains extending longitudinally throughout said body and arranged in spaced relation from one another, whereas an electrically operable igniter is arranged at the forward end of the motor body and separated from the powder grains by a transverse partition provided with apertures or flash-holes.
- An object of the present invention is a rocket igniter adapted to project gas jets of high temperature through the flash holes with a substantially definite energy and at predetermined points of the combustible propellent charge to allow the ignition of said charge to be obtained in a symmetrical relation with respect to the size and shape of the charge.
- Another object of the invention is to provide means facilitating control of the projection of the igniting hot gases generated by the igniter to allow them to be projected only when a predetermined pressure is reached in the igniter.
- Still another object of the invention is to provide means preventing non-ignited powder from being thrown out of the igniter by hot gas-jets.
- a further object of the invention resides in a perfectly symmetrical arrangement of the igniter with respect to the axis of the rocket and to the propellent charge.
- the rocket motor according to the invention comprises an electrically operable igniter formed by a flat cylindrical metal box or hollow body completely filled with a compressed igniting charge and comprising a cup-like lower part the bottom of which is applied against the front face of the powder grains and provided with flash holes arranged adjacent the voids provided between the grains, respectively, and symmetrically with respect to the voids, and a cover into which the cup is forced and the edge of which is bent outwardly and backwardly to be tightly and elastically forced into the forward end of the hollow metal box to form a head therefor, means for temporarily obturating the flash holes to allow the same to be opened only when the gas pressure in the igniting box has reached a predetermined value, and two electrical squibs arranged inside the igniting box symmetrically with respect to the motor axis and to the flash holes.
- Fig. 1 illustrates a vertical section of the device, which is shown in an elevation.
- Fig. 2 is a cross-section taken along line l.IlI of Fig. 1.
- the rocket motor illustrated in Fig. 1 includes a combustible propellent charge constituted by a block of powder 1 provided with longitudinal channels so that the transverse section of said block is in the shape of a cross as indicated in Fig. 2.
- This block is housed in the hollow cylindrical body 2 in which it is maintained in position nited States Patent Patented May 14, 1957 by means of a plurality of wedges 3, 3.
- a flat cylindrical metal box 4 containing the igniter.
- the box 4 consists of a cuplike part or member 5 having an upright wall and a bottom Wall, the latter being applied to the adjacent front face of the block 1 and has flash holes or perforations 6, 6, 6", 6" arranged between the ribs or legs of the cross-shaped block 1.
- This cup-like part 5 is forced into a cover 7 having its edge bent outwards and backwards, to present a U-shaped peripheral flange 8 facing said body end and abutting the inner wall defining said hollow body 2, which flange is forced into the fore end of said body and constitutes an obturator therefor.
- this arrangement supplies a good centering of the ignition box 4 relative to the rocket body 2.
- Two electric squibs 9, 9' are symmetrically arranged with respect to the axis of the body.
- igniters may be, for instance, set on a metal bracket 10 welded at 11 to and centrally of the cup-like part 5, the ends of the bracket carrying small retaining tubes 12, 12 made of a plastic material through which pass for accommodation the feeding or ignition wires 13, 13 of the igniters, the wires crossing next the bottom of the cup and the body of the rocket motor.
- the box 4 is entirely filled with compressed ignition charge'so that the density of said charge remains unchanged after long transport and storage. Further the box is constructed to be gastight.
- the flash holes 6, 6', 6", 6" are covered, as shown in Fig. 2, with 'a' gauze 14 impregnated with a suitable varnish.
- the holes are merely partly cut through to form breaking lines whereby the complete opening thereof is caused after ignition due to the pressure of the gases generated by the combustion of the ignition charge.
- a rocket motor which is characterized by a substantially cylindrical hollow body open at at least one end thereof, a substantially flat cylindrical closure box for receiving an igniting charge seated within the open end, the box including a cup-shaped member having a bottom wall and an upright wall, the cup-shaped member opening toward the open end of the body, a covermember for the cup-shaped member and provided with U-shaped peripheral flange means facing the body end, the peripheral flange means abutting against the inner wall defining the hollow body and embracing the upright wall of the cup-shaped member to thereby close the box, the bottom of the cup-shaped member being provided with perforations directed toward a propellent charge when placed in the hollow body adjacent the box, and electrical igniting means mounted on the bottom of the cup-shaped member and including ignition wire means and electric squib means symmetrically arranged with respect to the axis of the hollow body, and retaining tube means for accommodating the ignition wire means and extending from the squib means
- a rocket motor a substantially cylindrical hollow body open at at least one end thereof, a powder grain propellent charge arranged in said hollow body and provided with longitudinal channels, a compressed igniting charge, an electrically operable igniter formed by a flat cylindrical metal box completely filled with said compressed igniting charge and comprising a cup-like lower part the bottom of which is applied against the end of said propellent charge and is provided with flash liol'es arranged adjacent said channels provided in said charge, respectively,,and symmetrically withsrespect to. saidchannels; acover intdwhich said cupalike partris-forcedand. theredge'of which is bent outwardly and backwardly to:
- propell'ent charge arranged im said hollow body" and. pro.- vided with longitudinal channels; a. compressed. igniting charge, an. electrically operable: igniter formed. by a; flat-- cylindrical. metal box completely filled with. said. com..- pressed igniting charge and comprisingat. cup-like lower. part the bottom. of which. is applied against the end. of said propellent charge and provided with; flash holesarranged. adjacent to the: channelsprovidcd insaid charge,
- said propellentcharge and provided: with flash holes arranged; adjacent thechannels provided in said charge, respectively, and symmetrically'with respecttosaid chant n'els, and a cover into which said cup-like part is forced and the edge; of which: is bent outwardly: and backwardly to betightly and elastically forced intothe forward end of the hollow body to form the head therefor, a gauze impregnated with a varnish. temporarily obturating said flash holes to allow some to be opened only when the gas pressure in the igniting box has reached a predetermined value, and. two electrical squibs arranged inside said igniting box symmetrically with respect to the axis of said motor and to the flash holes.
- a combustible propellent charge comprising a powder block having a cross-shaped transverse section, a hollow body open at at least one end wherein said block is: arranged longitudinally, a compressed igniting charge, an electrical igniter formed by a flat cylindrical metal box completely filled with said compressed igniting charge and constituted by a cup-likelower part the bottom of which is applied against the end of said powder block and provided with four flash holes arranged symmetrically'with' respect to the axis of the motor, a cover into which said cup-like part is forced and the edge of-whicli is bent outwardly andbackwardly to be tightly and elastically forced into the open end of the hollow body to form the head thereof, means for temporarily obturating said flash holes to allow same to be opened only when the gas pressure in the igniting box has reached a predetermined value, a bracket fixed to the bottom of the: cup-likepart of the igniting box, two insulating tubes carried by the ends of
- a rocket motor comprising a substantially cylindrical hollow body open at at least one end thereof, a substantially flat cylindrical closure box for receiving an igniting charge seated within said open end, said box including a cup-shaped member having abottom wall and an upright wall, said cup-shaped member opening toward said open end of said body, a cover member for said cup-shaped member andprovided with U-shaped peripheral flange means facing said body end, said peripheralfiange means abutting against the inner wall defining said' hollow body and embracing said upright wall of said cup-shaped'membertothereby close-said box, the bottom of said cup-shaped member being provided with perforations directedtoward apropellent.
- a rocket igniter for insertion in the open end of arocket motor to be filled with a propellent charge comprising a closure box for containing the igniting charge, said box including a cup-shaped member having a bottom wall and an upright wall and opening toward the open end of said motor, a cover member for said cup-shaped member and provided with laterally extending U-shaped flange means to respectively engage said upright wall of said cup-shaped member for closing-the latter and to abut against a: wall of said rocket motor defining said open end, electric squib means having wires, bracket means on the bottom of" said' cup-shaped member for carrying said electric squib'rneans, and wire retaining tube means, whereby said wires from said squib means extend through said tube means and said bottom wall of said cup-shaped member into said propcllent charge of said rocket motor, said bottom wall of said cup-shaped member being provided with perforations equi-distantly spaced from the center of said bottom wall and directed toward said propellent
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR952421X | 1951-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2791962A true US2791962A (en) | 1957-05-14 |
Family
ID=9486616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US280720A Expired - Lifetime US2791962A (en) | 1951-04-10 | 1952-04-05 | Rocket igniter |
Country Status (8)
Country | Link |
---|---|
US (1) | US2791962A (de) |
BE (1) | BE510197A (de) |
CH (1) | CH302185A (de) |
DE (1) | DE952421C (de) |
FR (1) | FR61564E (de) |
GB (1) | GB717185A (de) |
LU (1) | LU31362A1 (de) |
NL (2) | NL84466C (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2973713A (en) * | 1957-12-31 | 1961-03-07 | Phillips Petroleum Co | Ignition of solid rocket propellants |
US2976680A (en) * | 1956-12-21 | 1961-03-28 | Donald D Kobbeman | Combination igniter and nozzle |
US2980021A (en) * | 1956-06-14 | 1961-04-18 | Phillips Petroleum Co | Ignition of solid rocket propellants |
US2988876A (en) * | 1957-12-26 | 1961-06-20 | Phillips Petroleum Co | Ignition of solid rocket propellants |
US2989844A (en) * | 1957-01-02 | 1961-06-27 | Phillips Petroleum Co | Ignition of solid rocket propellants |
US3115320A (en) * | 1959-02-03 | 1963-12-24 | Rocket Power Inc | Ejection seat catapult |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110153260A (zh) * | 2019-06-06 | 2019-08-23 | 南京理工大学 | 一种点火药盒模具 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191516712A (en) * | 1915-11-26 | 1916-11-23 | Ernest Arthur Hailwood | Improvements in Ammunition Primers. |
US1812010A (en) * | 1930-12-03 | 1931-06-30 | Lewis M Mcbride | Shell construction |
GB580866A (en) * | 1944-04-05 | 1946-09-23 | Conrad David Schermuly | Improvements in or relating to water-borne flares, rocket-discharging devices and the like |
FR922209A (fr) * | 1945-12-21 | 1947-06-03 | Controles Ind Et | Tubes-moteurs à réaction applicables en particulier à la propulsion des projectiles automoteurs |
US2469350A (en) * | 1943-04-02 | 1949-05-10 | Charles C Lauritsen | Rocket device |
US2515048A (en) * | 1943-04-02 | 1950-07-11 | Us Navy | Multiple rocket motor |
US2685837A (en) * | 1943-04-02 | 1954-08-10 | Us Navy | Igniter |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2462135A (en) * | 1944-04-06 | 1949-02-22 | Leslie A Skinner | Rocket primer |
FR1017531A (fr) * | 1949-04-14 | 1952-12-11 | Ici Ltd | Perfectionnements aux ensembles générateurs de gaz moteur |
-
0
- NL NL6919667.A patent/NL168481B/xx unknown
- LU LU31362D patent/LU31362A1/xx unknown
- NL NL84466D patent/NL84466C/xx active
- BE BE510197D patent/BE510197A/xx unknown
-
1951
- 1951-04-10 FR FR61564D patent/FR61564E/fr not_active Expired
-
1952
- 1952-03-22 CH CH302185D patent/CH302185A/fr unknown
- 1952-03-27 GB GB7882/52A patent/GB717185A/en not_active Expired
- 1952-04-05 US US280720A patent/US2791962A/en not_active Expired - Lifetime
- 1952-04-06 DE DES28012A patent/DE952421C/de not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191516712A (en) * | 1915-11-26 | 1916-11-23 | Ernest Arthur Hailwood | Improvements in Ammunition Primers. |
US1812010A (en) * | 1930-12-03 | 1931-06-30 | Lewis M Mcbride | Shell construction |
US2469350A (en) * | 1943-04-02 | 1949-05-10 | Charles C Lauritsen | Rocket device |
US2515048A (en) * | 1943-04-02 | 1950-07-11 | Us Navy | Multiple rocket motor |
US2685837A (en) * | 1943-04-02 | 1954-08-10 | Us Navy | Igniter |
GB580866A (en) * | 1944-04-05 | 1946-09-23 | Conrad David Schermuly | Improvements in or relating to water-borne flares, rocket-discharging devices and the like |
FR922209A (fr) * | 1945-12-21 | 1947-06-03 | Controles Ind Et | Tubes-moteurs à réaction applicables en particulier à la propulsion des projectiles automoteurs |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2980021A (en) * | 1956-06-14 | 1961-04-18 | Phillips Petroleum Co | Ignition of solid rocket propellants |
US2976680A (en) * | 1956-12-21 | 1961-03-28 | Donald D Kobbeman | Combination igniter and nozzle |
US2989844A (en) * | 1957-01-02 | 1961-06-27 | Phillips Petroleum Co | Ignition of solid rocket propellants |
US2988876A (en) * | 1957-12-26 | 1961-06-20 | Phillips Petroleum Co | Ignition of solid rocket propellants |
US2973713A (en) * | 1957-12-31 | 1961-03-07 | Phillips Petroleum Co | Ignition of solid rocket propellants |
US3115320A (en) * | 1959-02-03 | 1963-12-24 | Rocket Power Inc | Ejection seat catapult |
Also Published As
Publication number | Publication date |
---|---|
NL84466C (de) | |
NL168481B (nl) | |
LU31362A1 (de) | |
CH302185A (fr) | 1954-10-15 |
DE952421C (de) | 1956-11-15 |
GB717185A (en) | 1954-10-20 |
BE510197A (de) | |
FR61564E (fr) | 1955-05-12 |
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