US2912933A - Safety device - Google Patents
Safety device Download PDFInfo
- Publication number
- US2912933A US2912933A US519456A US51945644A US2912933A US 2912933 A US2912933 A US 2912933A US 519456 A US519456 A US 519456A US 51945644 A US51945644 A US 51945644A US 2912933 A US2912933 A US 2912933A
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- United States
- Prior art keywords
- rotor
- squib
- wheel
- passage
- toggle
- 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
- 230000001133 acceleration Effects 0.000 description 9
- 239000002184 metal Substances 0.000 description 6
- 230000000979 retarding effect Effects 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 230000002459 sustained effect Effects 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 101100163433 Drosophila melanogaster armi gene Proteins 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
- F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
- F42C15/192—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/06—Electric contact parts specially adapted for use with electric fuzes
Definitions
- This invention relates to circuit making and breaking devices and more particularly to a novel inertia-arming switch for use in an electrical device, such as a fuze, in a projectile.
- An object of this invention is to provide an inertiaoperated powder train interrupter and switch for projectile fuzes, which, when acted upon by a sustained force of set-back, actuates one or more switches and also establishes a connection between a squib and a booster charge.
- a further object of this invention is to provide aninertia-operated device in which a rotor having a passage extending therethrough is rotated by a sustained force of setback, whereby it moves the passage into position to establish a connection between an electrically red squib and a booster charge, and also operates one or more electrical switches.
- a toggle is provided which tends to retain the rotatable element either in its normal or unarmed position, or in its armed position.
- Retarding means such as an escapement, is provided to retard ro tation of the rotating element and thus assure that the device will be actuated only by a sustained force of setback. The retarding means also delays the arming of the device until the projectile has traveled a safe distance,
- the new device resets to a safe position if the acceleration is not maintained for a proper duration, and remains unresponsive to a sudden shock or to the cumulative effect of repeated shocks. ln this way, premature explosions resulting from the shock of tiring or from rough handling are avoided.
- FIG. 1 is a top view of one embodiment of the invention for use in an electrical fuze, showing the parts in their unarmed or safe positions, with sections broken away to show details of the structure;
- Fig. 2 is a front elevation of the device shown in Fig. 1',
- Fig. 3 is a rear elevation of the device shown in Fig. 1;
- Figs. 4 and 5 are vertical sectional views taken on lines 4 4 and 5-5 of Fig. 1, respectively;
- Fig. 6 is a vertical sectional view taken on line 6-6 of Fig. 1 but Vwith the rotor in its armed position
- Fig. 7 is a perspective view of the rotor of the device.
- the numeral 10 represents the chassis or base plate of the device which has an opening 36 therein for a purpose which will be explained presently, and to which are attached supporting members 11 and 12 by means of bolts or other suitable means.
- Stub shafts 13 and 14 carried by supporting member 12 carry notched or toothed wheel 15 and rocker wheel 16, respectively, the latter having pins 17 which cooperate with the notches in Wheel 15 to constitute an escapement.
- Supporting member 11 supports one end of a semicylinder 18 of insulating material, the other end of the semicylinder being keyed to, and serving as a support for rotor 19. Additional support for the rotor is provided by shaft 20 2,912,933 Patented Nov.
- the rotor 19 carries a weight 26 mounted near its periphery so as to cause rotation of the rotor when a force of setback is applied.
- the rotor 19 also contains an opening 27 which diminishes in diameter near the centerY Y' of the rotor where it communicates with a passage 27a extending at an angle from the line of opening 27.
- Passage 27a and opening 27 form a passage which eX tends entirely through the rotor transversely thereof.
- An electrically operable squib S (shown only in Figs. 3, 5 and 6) is adapted to be inserted in opening 27 and is connected to contacts 32 and 33 which lie on the periphery of the rotor near the outer end of passage 27a.
- the passage 27a serves as a conduit for the electrical connections 34 and 35 between the squib and the contacts 32 and 33.
- a crank-shaped connecting member 28 is secured to the notched wheel 15 and rotor 19 and extends upwardly in front of the shaft 20 between the wheel and the rotor. This member 28 serves to increase the angle of toggle action at the end of the arming cycle so that 270 degrees of total rotation of rotor 19 may be obtained.
- a spring 29 attached at one end to post 29a on the chassis passes upwardly behind shaft 20 and is attached at its other end to the central portion of connecting member 28.
- Resilient metal strips 30 and 31 attached to the chassis 10 bear against the periphery of rotor 19 and make electrical contact with the contact points 32 and 33 whenv the rotor is in its armed position (Fig. 6). This closes what is called the squib circuit.
- the spring 29 will continue to rotate the rotor 19 until stopped by the limiting action of the unnotched portion of the escapement wheel 15. In this position the squib passage 27 is directly in line with the opening 36 and will detonate the booster when the squib is tired.
- the contactors consisting of resilient metal strips 30 and 31 ⁇ engage contact points 32 and 33 mountedon rotor 19 so The retarding of that upon operation of the fuze, the squib S will be fired electrically through contactors 30 and 31, contacts 32 and, and conductors Stand 35.
- thepassager34 provides a direct connection between the squib S and Va .booster charge (not shown) so that when thesquib is red,'it will flash into the booster charge through opening 36 and ignitefthe booster.
- the initial andtnal positions of the rotor are determined by varying the number and position ofthe notches on the periphery of notched wheel.15thus limiting the rotation ofnotched wheel-15, and ,consequently the rotation of the rotor 19.
- Other means such as detents, may be used to determine these positions of the rotating elements, if desired.
- the squib may be mounted adjacentthe rotor in such a positionthat the rotor provides a-safety gate between the squib and the boosterwhen the rotor-is in itsunarmed position, andprovides a connecting passage between the squib and the booster through passage 27.-,2711 when the rotor-is in its armedposition ⁇ shown in Fig-6.
- the contacts 32 and 33 would be connected together electrically-so that rotation of the rotorl to, its armed position shown'in Eig.'6 wouldkprovide awconnection between resilient :strips tland l31 to arm the squib.
- therprovision of kthetoggle and the escapement in the device assures thatv the device will beactuated only-by a sustained force of setback, thus avoiding premature ⁇ explosions resulting from the shock of ring ori-from rough' handling.
- the delay interposed by the escapement vas sures thatzthe'device will be boresafe-andallows time for the heating ofy electronic tubes, if-such are employed in the-fuze circuit.
- the chassis 10and the rotor "19 may be of ⁇ nonconducting material if desired, or ii such material is not used, suitable insulation will, of course, be required between electrically conducting elements and the chassis 10 and-rotor 19.
- a potentially movable squib in .a-.Setback switch, a potentially movable squib, a contactorxed at the arming position of the switch .and comprisingthe terminal of an electrical circuit for ⁇ detonating the squib, and an inertia-operable safety device supportingthe s quibat an initially unarmed Vposition and causing its eventualrnovementtoward the armed position, said device having a conductor leading vfrom the squib and terminating in a contact distanced lfronnthe contacter in said; unarmed position.
- a ,projectile fune Yswitch comprising inertia-oper;-
- - able element carrying an:electricallyiiiredsquib
- a-spring toggle device connected eccentrically to -said element, applying a p ull, on theelement-toturn it ,-towardunarmed and armedpositions when exercised atopposite .sidesof the turningaxis, a toothed escapement wheel coupled to the elementa rocker pin device actingon the teeth ltosloyv the element when turned by components of ,setback and togglespring action during acceleration o -f ,tlreSWiiCk an untoothed portion on said wheel coacting with .theroclr'er pin device to limit turning of the element toward itsrespective positions, and contact-making means rendered operative by lsaid element for closing ari electrical circuit through the squib in the-arming position o-ffsaidelement.
- a projectile fuze switch comprising an inertia-open
- ra spring toggle device located in ⁇ the space being coupled eccentrically toA-the element and wheel to applya pull to turn them toward unarmed andarmed positions when exercised at oppositesides ofthe axis, ay
- a projectile fuze switch comprising an inertiaoper able element carrying an electrically tired squib, a spring toggle device connected eccentrically to said element, applying a pull on the element to turn it toward unarmed and armed positions when exercised at opposite sides of the turning axis, a time-delay mechanism coupled to the element to slow the element when turned by components of setback and toggle spring action during acceleration of the switch, means on said element to limit turning of the element toward its respective positions, and contact-mak ing means rendered operative by said element for c1osing an electrical circuit through the squib in the arming position of said element.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Elimination Of Static Electricity (AREA)
- Air Bags (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Description
Nov. 17, 1959 J. RABlNow 2,912,933
SAFETY DEvxcE Filed Jan. 24, 1944 2 Sheets-Sheet l FIG. 2.
l2 V 3l 30 25 24 /l F I6. l.
5 2 27 23 22 9 a ./Acoa WIW/ow Nov. 17, 1959 J. RABlNow 2,912,933
SAFETY DEVICE Filed Jan. 24, 1944 2 Sheets-Sheet 2 FIG. -4. F I6. 5.
I mvENToR JACOB RAB/NOW SAFETY DEVICE Jacob Rabinow, Washington, D.C., assgnor to the United States of America as represented by the Secretary of the Navy Application January 24, 1944, Serial No. 519,456
6 Claims. (Cl. 102-70.2)
(Granted under Title 35, U.S. Code (1952), sec. 266) This invention relates to circuit making and breaking devices and more particularly to a novel inertia-arming switch for use in an electrical device, such as a fuze, in a projectile.
An object of this invention is to provide an inertiaoperated powder train interrupter and switch for projectile fuzes, which, when acted upon by a sustained force of set-back, actuates one or more switches and also establishes a connection between a squib and a booster charge.
A further object of this invention is to provide aninertia-operated device in which a rotor having a passage extending therethrough is rotated by a sustained force of setback, whereby it moves the passage into position to establish a connection between an electrically red squib and a booster charge, and also operates one or more electrical switches. A toggle is provided which tends to retain the rotatable element either in its normal or unarmed position, or in its armed position. Retarding means, such as an escapement, is provided to retard ro tation of the rotating element and thus assure that the device will be actuated only by a sustained force of setback. The retarding means also delays the arming of the device until the projectile has traveled a safe distance,
and allows time for the heating of electronic tubes if such are employed in the fuze. The new device resets to a safe position if the acceleration is not maintained for a proper duration, and remains unresponsive to a sudden shock or to the cumulative effect of repeated shocks. ln this way, premature explosions resulting from the shock of tiring or from rough handling are avoided.
These and further objects will be apparent from the following description and the accompanying drawings, in which Fig. 1 is a top view of one embodiment of the invention for use in an electrical fuze, showing the parts in their unarmed or safe positions, with sections broken away to show details of the structure;
Fig. 2 is a front elevation of the device shown in Fig. 1',
Fig. 3 is a rear elevation of the device shown in Fig. 1;
Figs. 4 and 5 are vertical sectional views taken on lines 4 4 and 5-5 of Fig. 1, respectively;
Fig. 6 is a vertical sectional view taken on line 6-6 of Fig. 1 but Vwith the rotor in its armed position, and
Fig. 7 is a perspective view of the rotor of the device.
Referring to the drawings, the numeral 10 represents the chassis or base plate of the device which has an opening 36 therein for a purpose which will be explained presently, and to which are attached supporting members 11 and 12 by means of bolts or other suitable means. Stub shafts 13 and 14 carried by supporting member 12 carry notched or toothed wheel 15 and rocker wheel 16, respectively, the latter having pins 17 which cooperate with the notches in Wheel 15 to constitute an escapement. Supporting member 11 supports one end of a semicylinder 18 of insulating material, the other end of the semicylinder being keyed to, and serving as a support for rotor 19. Additional support for the rotor is provided by shaft 20 2,912,933 Patented Nov. 17, 1959 Cir which connects wheel 15 and the rotor, and serves as a driving connection between the two. The centralportion of semicylinder 18 has a flat side` 21 which engages resilient metal strips 22 and 23 mounted on the chassis 10. When the semicylinder is rotated, its round portion bears against the resilient metal strips 22 and 23 and ex erts a cam action against them, forcing the metal strips into engagement with contacts 24 and 25, respectively, which are also carried by the chassis 10.
The rotor 19 carries a weight 26 mounted near its periphery so as to cause rotation of the rotor when a force of setback is applied. The rotor 19 also contains an opening 27 which diminishes in diameter near the centerY Y' of the rotor where it communicates with a passage 27a extending at an angle from the line of opening 27.
A crank-shaped connecting member 28 is secured to the notched wheel 15 and rotor 19 and extends upwardly in front of the shaft 20 between the wheel and the rotor. This member 28 serves to increase the angle of toggle action at the end of the arming cycle so that 270 degrees of total rotation of rotor 19 may be obtained. A spring 29 attached at one end to post 29a on the chassis passes upwardly behind shaft 20 and is attached at its other end to the central portion of connecting member 28.
The operation of the device will now be explained. With the parts of the device in their unarmed positions as shown in Fig. l through 5, switches 22-24 and 23-25 and the switch which comprises resilient elements 30 and 31 and contacts 32 and 33 are open. Passage 27-27a in the rotor 19 is in the position shown in Fig. 5, and in this position the squib and the booster charge (not shown) are separated by the rotor so that if the squib is prematurely tired, the flash cannot reach the booster charge through opening 36 to ignite the booster. Due to the fact that one of the pins 17 lies in an end notch of the notched escapement wheel 15, the latter and rotor19 are at the limit of their clockwise movement, as viewed in Fig. 4. The toggle consisting of spring 29 and connecting member 28 tends to maintain the rotor and notched wheel in this initial position, in which the device is unarmed.
When the device is acted upon by a force of setback caused by acceleration in the direction of the arrows in Figs. 2 and 3 of a projectile containing the device, the inertia of weight 26 causes it to shift to the right, as viewed in Fig. 5, thus rotating the rotor 19 in the direction of the dotted arrow in Fig. 5. As soon as the weight 26 has moved the toggle through its dead center position, the toggle will continue the rotation of the rotor until it reaches the position where the center of gravity of the rotor is nearest to the base, in which position the rotor is retained as long as the mechanism is under acceleration of sufficient magnitude to overcome the force of spring 29. After the cessation of acceleration, the spring 29 will continue to rotate the rotor 19 until stopped by the limiting action of the unnotched portion of the escapement wheel 15. In this position the squib passage 27 is directly in line with the opening 36 and will detonate the booster when the squib is tired.
lnotches on the periphery of wheel 15. the rotation of rotor 19'bythe;escapernent:prevents the device from being armed=prematurely bythe Vshock of firing or from rough handling. n Also, theretarding action of thelescapementtdelays the arming of :the device until a predetermined period vof time has elapsed during which the projectile travels a certain safe distance away from the projector from which it Awas red, and during which period anyelectronictubes which may be in circuit with the device are allowed to heat.' If therotor is vturned a short distance Lby an unsustained acceleration caused, for
example,A bydropping the device, thespring 29 willreturn the rotorand the notched wheel 15 to1their original positions'. after tenninationof the shock, so that the device remains unarmed andrepeatedshocks have n cumulative effect. y
`Rotation of the rotor to the position shown in Fig. 6 rotates semicylinder 18. Rotation of the semicylinder causes its round portion to bear against resilient metal strips 22 and 23, thus forcing them into contactwith the contact members 24 and 25 and closing the circuits including those contacts, for, example, .A and B battery circuits. Ifvitis desired to close the contacts 22--24 and.2325 earlier in the arming cycle, springs 2,2 Aand 23 may be weighted with sufficient mass so that Vthe-applicationof setback-causes the springstobend and thus close thesecontacts. The actionof the .semicylinder-will then be merely that of a lock to keep these contactsclosed after the acceleration has ceased. When the rotor reaches the nal or armed position shown in Fig. 6, the contactors consisting of resilient metal strips 30 and 31`engage contact points 32 and 33 mountedon rotor 19 so The retarding of that upon operation of the fuze, the squib S will be fired electrically through contactors 30 and 31, contacts 32 and, and conductors Stand 35. `When rotor19 is in the -position shown in` Fig..6, thepassager34 providesa direct connection between the squib S and Va .booster charge (not shown) so that when thesquib is red,'it will flash into the booster charge through opening 36 and ignitefthe booster. The initial andtnal positions of the rotor are determined by varying the number and position ofthe notches on the periphery of notched wheel.15thus limiting the rotation ofnotched wheel-15, and ,consequently the rotation of the rotor 19. Other means such as detents, may be used to determine these positions of the rotating elements, if desired.
Instead of mounting the squib in Athe passage 27 as described above, the squib may be mounted adjacentthe rotor in such a positionthat the rotor provides a-safety gate between the squib and the boosterwhen the rotor-is in itsunarmed position, andprovides a connecting passage between the squib and the booster through passage 27.-,2711 when the rotor-is in its armedposition` shown in Fig-6. In such an embodiment of the invention, the contacts 32 and 33 would be connected together electrically-so that rotation of the rotorl to, its armed position shown'in Eig.'6 wouldkprovide awconnection between resilient :strips tland l31 to arm the squib.
As explained above, therprovision of kthetoggle and the escapement in the device assures thatv the device will beactuated only-by a sustained force of setback, thus avoiding premature` explosions resulting from the shock of ring ori-from rough' handling. The delay interposed by the escapement vassures thatzthe'device will be boresafe-andallows time for the heating ofy electronic tubes, if-such are employed in the-fuze circuit. Once the toggle passes deadcenter, it assures that the rotor -will reach the desired armedposition, -due to the fact that the spring in the toggle will cause the-rotor to continue its rotation even though the force of acceleration which initially actuated the deviceV has ceased. In constructing thedevice, the chassis 10and the rotor "19 may be of `nonconducting material if desired, or ii such material is not used, suitable insulation will, of course, be required between electrically conducting elements and the chassis 10 and-rotor 19.
The invention herein described may be manufactured and used by or for the Government of the United States of America for governmental-purposes without the payment of any royalties ,thereon-onthercfor.
I claim:
rl. In an inertia-operated device `for projectile fuzes, af
rotor'havi'ng a weight mounted therein near-the periphery of said rotor,.the rotor having an explosion discharge passage adapted rto ycontain anpelectrically detonatable `s ,quib and being movable by asetback force on the weight from an unarmed position in whichvthe-passage is inoperative toward an armed. position in which the passage, is operative to discharge, a earn rotatable with said rotor, a switch for closing a circuit being operable by said cam, a switch arm engageable with the `rotor ,for closing a squib circuitto conduct current to detonate the Isquib whenthe yrotor lis in its,;arrned position, a toggle connected to and tending to maintain said rotor in Arespectively-itsunarmed and armed positions, means for retarding said rotor whilerotatingto vthe latterposition, and means ontherotor coacting ,with ,a part of the retarding means for determining the respective armed/.arid unarmed positions of saidrotorpandtthe circuitfopen and Circuit-Closed positions of said cam.
2. in .a-.Setback switch, a potentially movable squib, a contactorxed at the arming position of the switch .and comprisingthe terminal of an electrical circuit for `detonating the squib, and an inertia-operable safety device supportingthe s quibat an initially unarmed Vposition and causing its eventualrnovementtoward the armed position, said device having a conductor leading vfrom the squib and terminating in a contact distanced lfronnthe contacter in said; unarmed position.
3 A ,projectile fune Yswitch comprising inertia-oper;-
- able element carrying an:electricallyiiiredsquib, a-spring toggle device connected eccentrically to -said element, applying a p ull, on theelement-toturn it ,-towardunarmed and armedpositions when exercised atopposite .sidesof the turningaxis, a toothed escapement wheel coupled to the elementa rocker pin device actingon the teeth ltosloyv the element when turned by components of ,setback and togglespring action during acceleration o -f ,tlreSWiiCk an untoothed portion on said wheel coacting with .theroclr'er pin device to limit turning of the element toward itsrespective positions, and contact-making means rendered operative by lsaid element for closing ari electrical circuit through the squib in the-arming position o-ffsaidelement.
4. A projectile fuze switch comprising an inertia-open,
able element carryingv an` electrically tired squib, a toothed escapement :wheel axially coupled `to .said element .and
spaced therefrom, ra spring toggle device located in `the space being coupled eccentrically toA-the element and wheel to applya pull to turn them toward unarmed andarmed positions when exercised at oppositesides ofthe axis, ay
' escapernen-t-wheel, an off-centered shaft connecting said element and wheell in 'spaced relationship and serving as -a driving connection therebetween, a toggle device located in the space, consisting of a crank shaped member secured to j theelement and wheel and having a portion in proximity to the shaft, and an :anchored spring connected to said portiom- `Said toggle device applying a pull onthe element `closing an electrical circuit through the squib in the armi ing position of said element.
6. A projectile fuze switch comprising an inertiaoper able element carrying an electrically tired squib, a spring toggle device connected eccentrically to said element, applying a pull on the element to turn it toward unarmed and armed positions when exercised at opposite sides of the turning axis, a time-delay mechanism coupled to the element to slow the element when turned by components of setback and toggle spring action during acceleration of the switch, means on said element to limit turning of the element toward its respective positions, and contact-mak ing means rendered operative by said element for c1osing an electrical circuit through the squib in the arming position of said element.
References Cited in the file of this patent UNITED STATES PATENTS 1,311,104 Watson July 22, 1919 1,726,325 Varaud Aug. 27, 1929 2,403,063 Elmer July 2, 1946 FOREIGN PATENTS 314,716 Germany Oct. 13, 1919 328,410 Germany Nov. 5, 1920
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US519456A US2912933A (en) | 1944-01-24 | 1944-01-24 | Safety device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US519456A US2912933A (en) | 1944-01-24 | 1944-01-24 | Safety device |
Publications (1)
Publication Number | Publication Date |
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US2912933A true US2912933A (en) | 1959-11-17 |
Family
ID=24068384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US519456A Expired - Lifetime US2912933A (en) | 1944-01-24 | 1944-01-24 | Safety device |
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Country | Link |
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US (1) | US2912933A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3240891A (en) * | 1963-04-29 | 1966-03-15 | Hamilton Watch Co | Inertial switch |
US3308761A (en) * | 1963-09-30 | 1967-03-14 | Contigea Sa | Electric fuses for projectiles |
US4099466A (en) * | 1977-05-05 | 1978-07-11 | The United States Of America As Represented By The Secretary Of The Navy | Trajectory adaptive safety-arming device |
US4202271A (en) * | 1978-07-25 | 1980-05-13 | The United States Of America As Represented By The Secretary Of The Army | Safe and arm device |
FR2512195A1 (en) * | 1981-09-03 | 1983-03-04 | France Etat | SAFETY AND ARMING DEVICE FOR STARTING UNDERWATER LOADS |
FR2543288A1 (en) * | 1983-03-23 | 1984-09-28 | Luchaire Sa | Base fuse for a bomb |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE314716C (en) * | ||||
US1311104A (en) * | 1919-07-22 | Detonator por ordnance-projectiles | ||
DE328410C (en) * | 1913-10-07 | 1920-11-05 | Johann Ferdinand Meissner | Time or impact igniter with a heavy drop weight, which at a certain point in time tears a wire or thread tensioned inside the igniter and thereby causes the ignition |
US1726325A (en) * | 1927-07-19 | 1929-08-27 | Varaud Andre | Percussion fuse for projectiles |
US2403063A (en) * | 1945-02-16 | 1946-07-02 | Westinghouse Electric Corp | Switch |
-
1944
- 1944-01-24 US US519456A patent/US2912933A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE314716C (en) * | ||||
US1311104A (en) * | 1919-07-22 | Detonator por ordnance-projectiles | ||
DE328410C (en) * | 1913-10-07 | 1920-11-05 | Johann Ferdinand Meissner | Time or impact igniter with a heavy drop weight, which at a certain point in time tears a wire or thread tensioned inside the igniter and thereby causes the ignition |
US1726325A (en) * | 1927-07-19 | 1929-08-27 | Varaud Andre | Percussion fuse for projectiles |
US2403063A (en) * | 1945-02-16 | 1946-07-02 | Westinghouse Electric Corp | Switch |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3240891A (en) * | 1963-04-29 | 1966-03-15 | Hamilton Watch Co | Inertial switch |
US3308761A (en) * | 1963-09-30 | 1967-03-14 | Contigea Sa | Electric fuses for projectiles |
US4099466A (en) * | 1977-05-05 | 1978-07-11 | The United States Of America As Represented By The Secretary Of The Navy | Trajectory adaptive safety-arming device |
US4202271A (en) * | 1978-07-25 | 1980-05-13 | The United States Of America As Represented By The Secretary Of The Army | Safe and arm device |
FR2512195A1 (en) * | 1981-09-03 | 1983-03-04 | France Etat | SAFETY AND ARMING DEVICE FOR STARTING UNDERWATER LOADS |
FR2543288A1 (en) * | 1983-03-23 | 1984-09-28 | Luchaire Sa | Base fuse for a bomb |
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