US3603259A - Fuze setback and angular acceleration detent - Google Patents

Fuze setback and angular acceleration detent Download PDF

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Publication number
US3603259A
US3603259A US3603259DA US3603259A US 3603259 A US3603259 A US 3603259A US 3603259D A US3603259D A US 3603259DA US 3603259 A US3603259 A US 3603259A
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Prior art keywords
slider
position
fuze
means
locking element
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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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George Webb
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Avco Corp
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Avco Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42CAMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/20Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
    • F42C15/22Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin using centrifugal force
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42CAMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18Arming-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
    • F42C15/184Arming-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 slidable carrier
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42CAMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/24Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means
    • F42C15/26Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means using centrifugal force

Abstract

A safety fuse is shown incorporated in rocket propelled round of ammunition. Two complementary mechanisms act upon a slider to maintain it in a position wherein a primer charge therein is out of register with a firing pin. When the round of ammunition is discharged from a gun, linear and angular acceleration are effective on a locking ball to overcome the action of a spring and disengage the ball to overcome the action of a spring and disengage the ball from a notch in the slider''s guideway. Angular acceleration of the round causes the ball to roll into a laterally extending position in the slider. After discharge from the gun, centrifugal force disengages two plungers from the slider permitting it to travel laterally bringing the primer charge into register with the firing pin.

Description

United States Patent [72] Inventor Georgewebb Richmond, Ind. [2]] Appl. No. 740,304 [22] Filed June 26, 1968 [45] Patented Sept. 7, 1971 [7 3] Assignee Avco Corporation Richmond, lnd.

ABSTRACT: A safety fuse is shown incorporated in rocket propelled round of ammunition. Two complementary mechanisms act upon a slider to maintain it in a position wherein a primer charge therein is out of register with a firing pin. When the round of ammunition is discharged from a gun, linear and angular acceleration are effective on a locking ball to overcome the action of a spring and disengage the ball to overcome the action of a spring and disengage the ball from a notch in the sliders guideway. Angular acceleration of the round causes the ball to roll into a laterally extending position in the slider. After discharge from the gun, centrifugal force N mmmm m H25 2 T 0m W A 1 k R 40 m f C n a" C m mm A m mm R m mm A n "n L m mm U m mm G n "u m D .m N F m mm A m m mm m m A m m mm m n m mm ET WS Nm L LM HEM d EC M wDl U .F M H UN 1 D 5.5.

[56] References Cited UNITED STATES PATENTS Brown et disengages two plungers from the slider permitting it to travel laterally bringing the primer charge into register with the firing pin.

PATENTEU SEP nsn 3503.259

INVENTOR. GEORGE WEBB MMW ATTORNEY FUZE SETBACK AND ANGIJLAR ACCELERATION DETENT The present invention relates to improvements in safety fuzes for ammunition.

Safety fuzes for ammunition have attained a high degree of reliability in preventing inadvertant detonation. This is particularly true of known fuzes which comprise a pair of spring loaded plungers that maintain a slider in a safe position. When a predetermined spin rate is attained, centrifugal forces cause the plungers to release the slider allowing it to travel to an armed position in which a primer charge is brought into register with the firing pin of the fuze. The firing pin will then impinge the primer charge to detonate the ammunition, upon impact with a target.

One object of the present invention is to provide a complementary mechanism, compatible with the above described type of safety, which will be responsive to other than centrifugal force and prevent inadvertant arming of a fuze in the remote and unlikely event the spring loaded plungers are inoperative for that purpose.

In its broader aspects, the invention has for its object, the provision of a simple inexpensive and highly reliable safety mechanism for preventing inadvertant arming of fuzes employed to detonate ammunition.

These ends are attained in a fuze construction wherein a locking element is resiliently maintained in a locking position to prevent lateral movement of a slider from a safe" position in which operative contact between a firing pin and primer charge is prevented. The locking element, preferably in the form of a ball, is displaced from its locking position by linear acceleration and maintained so displaced by rotational acceleration of the round of ammunition in which the fuze is incorporated. a

While the described safety mechanism can be used independently it cooperates uniquely in a construction wherein spring loaded plungers also prevent movement of the slider from its safe" position until a predetermined rate of spin has been imparted to the round of ammunition as evidenced by the centrifugal force required to disengage the locking plungers.

The above and other related objects and features of the invention will be more fully apparent from a reading of the following description of the accompanying drawing and the novelty thereof pointed out in the appended claims.

In the drawing:

' FIG. 1 illustrates a round of ammunition in which a fuze of the present invention is embodied;

FIG. 2 is a longitudinal section, on an enlarged scale, through the fuze identified in FIG. 1;

FIG. 3 is a section taken on line III-III in FIG. 2, illustrating the safe" position of the fuze;

FIG. 4 is a section taken on line IIIIII in FIG. 2, illustrating the armed position of the fuze;

FIG. 5 is a section taken on line VV in FIG. 3; and

FIG. 6 is a section taken on line VI-VI in FIG. 3.

While the present invention may be employed in fuzes, for a wide variety of ammunition, certain aspects are particularly applicable to the type of ammunition illustrated by the round 10 and seen in FIG. 1. The round 10 comprises an igniter 12, a rocket motor l4,'a fuze 16, a warhead 18 and a ogival cap 20.

Such a round is fired from a rifled barrel by igniting a prime in the igniter 12 to initiate combustion of a solid propellant in the rocket motor 14. The gases generated in this fashion accelerate the round through the barrel as an initial spin is imparted to it by the rifiing of the barrel. After discharge from the barrel the round is further accelerated by the rocket motor and additional spin is imparted to the round of discharge of hot gases through tangential spin ports 22. Thereafter, the fuze 16 detonates the warhead 18 upon impact with the target.

The fuze 16, now to be described, provides two complementary mechanisms for preventing inadvertent detonation of the warhead. Referencing FIGS. 2 and 3, the fuze 16 comprises a container 24 having a flange 26 which is spun inwardly to retain a body member 28. The safety and firing elements of the fuze are contained within the chamber formed by the container 24 and body member 28.

A slider 30 is retained in a symmetrical radial slot 32, formed in the body member 28 by a plate 33. The slider carries a primer charge 34 which in the safe position of the fuze, is maintained out of register with the path of travel of a firing pin 36. The slider 30 is held in this safe" position by a pair of locking plungers 38 which are respectively urged into notches 40, on opposite sides of the slider by springs 42.

A slot 44 is formed in one side of the slider 30 and receives a ball 46. A leaf spring 48 maintains the ball 46 in a recess 50 (FIGS. 5 and 6) formed in the body member 28. The spring 48 is of simple construction having one bent end 52 positioned by a hole in the slider 30 with its other end 54, being reversely folded within a slider slot 56 to overlie the ball 46. The ball 46 thus provides a second means for preventing inadvertent displacement of the slider 30 to its armed position.

A second ball 58 is carried within a slot 60, fonned in a slider 30, opposite the slot 44. The purpose of this second ball will be described later.

The firing pin 36 is mounted on a weight 62 and is biased from the slider 30 by a spring 64. The firing pin 36 travels in a generally axially direction, passing through an opening 66 in the retaining plate 33. A recess 68 in the slider 30 is registered with the firing pin 36 in the safe position of the fuze. The firing pin thus will not be damaged in the event it is thrown forwardly during handling or otherwise when the slider 30 is in its safe position.

In normal use the round of ammunition 10 would be loaded into a gun barrel with the fuze 16 in its described safe position. Upon firing of the igniter 12, the round will be accelerated both linearly and angularly as it is discharged along the gun barrel. The linear acceleration of the round will cause the ball 46 to deflect the free end 54 of the leaf spring 48 as the ball 46 is moved out of the body member recess 50. The angular acceleration of the round will cause the ball 46 to then roll within the slot in or passageway 44 toward the sidewall of the slot 32. As this occurs, the free end 54 of the leaf spring 48 will return toward its original position preventing the ball 46 from reentering the recess 50. The described movement of the ball 46 is best shown by the phantom line positions in FIG. 6.

In the environment of a rocket powered ammunition round, it is preferred that the described release of the safety provided by ball 46 occur within the limits of the rounds travel through the gun barrel.

After discharge from the barrel the round is further accelerated both linearly and angularly by the rocket motor. When the resultant centrifugal forces reach a predetermined level, the spring forces on locking plungers 38 are overcome and then they are withdrawn from the notches 40. The slider 30 has a greater mass at its upper end so that, it will be displaced by centrifugal force to the armed position of FIG. 4 once the plungers 38 have been so withdrawn. The balls 46, 58 are thrown by centrifugal force, into notches 70, formed in the sidewalls of slot 32, to lock the slider 30 in this armed position.

When the round 10 hits its target, the firing pin will be thrown forward to strike the primer charge 34, thus providing a high energy discharge which passes through an explosion 72 in the body member 28 to detonate the warhead 18.

The described safety action of the ball 46 is particularly suited to use in combination with a safety of the type provided by the plungers 38 in that it imposes a maximum number of force loadings which must be imposed in a proscribed sequence before the fuze is armed. Such loadings and sequence are virtually impossible to obtain except in actual firing of a round of ammunition. Therefore, an ultimate measure of safety is provided.

While it is extremely unlikely, if the locking plungers 38 failed to perform their safety function, the ball 46 would be capable of providing a fully adequate measure of safety. Thus it will be apparent that the described safety functions of the ball 46 will be adequate, per se, for the requirements of many types of ammunition.

In this connection it should be noted that the ball must be subjected to both linear and angular acceleration before it can be displaced to permit arming of the fuze. Not only is it unlikely that both such forces would occur in ordinary handling of ammunition or even accidental mishandling, it is further unlikely that they would occur with a magnitude comparable to those generated in the discharge of ammunition. Beyond this the linear force to displace the ball 46 may be in an opposite direction, as described, to that required to cause the firing pin to impact the primer charge. With this in mind it could be advantageous to have the leaf spring return the ball 46 into the locking recess 50 if there is not sufficient centrifugal force, in addition to linear and acceleration, to arm the fuze.

This and other modifications of the described and preferred embodiment of the invention will occur to those skilled in the art within this scope of the inventive concepts which are delineated by the following claims.

Having thus described the invention what is claimed as novel and desired to be secured by Letters Patent of the United States is:

1. A fuze for incorporation in a round of ammunition which will be linearly and angularly accelerated, relative to a central spin axis, when discharged from a gun, said fuze comprising:

a slider;

housing means including a guideway receiving said slider for movement in a path transverse to said spin axis;

a primer charge;

an igniting means;

means for lockin said slider in a safe position preventing operative contact between the igniting means and the primer charge;

said locking mean comprising:

a locking element partially engaging said slider and said housing means and maintaining the slider in said safe position;

a reversely folded leaf spring anchored in said slider, ef-

fective on said locking element in the same direction as the round of ammunition is to be linearly accelerated, for maintaining the locking element in its locking position;

said slider having a passageway transverse to said guideway and receiving said locking element when the locking element is displaced from its locking position against the action of said resilient means, upon linear acceleration of said ammunition round;

whereby the locking element will only be displaced from its locking position by a predetermined linear acceleration and only maintained so displaced in said slider passageway by angular acceleration, thereby permitting movement of the slider from its safe" position only under conditions encountered in discharge of the round of ammunition from a gun. 2. A fuze as in claim 1 wherein the locking element is a ball. 3. A fuze as in claim 1 wherein: the slider has a greater mass on one side of the spin axis, whereby when the locking element is displaced from its locking position the slider may be displaced by centrifugal force from its safe position to a position permitting operative contact between the igniting means and the primer charge. 4. A fuze as claim 1 further comprising: a plunger; and resilient means urging said plunger radially inwardly, relative to said spin axis, against the side of said slider in said safe position, thereby providing additional means for retaining said slider in its safe position, which means will be released only upon a spin rate producing a predetermined centrifugal force. 5. A fuze as in claim 2 further comprising: a pair of plungers; resilient means respective urging said plungers radially inwardly, relative to said spin axis, against opposite sides of said slider in said safe position; thereby providing additional means for retaining the slider in its safe position, which means will not be released upon a radial loading in only one direction relative to said Spln 8x18. 6. A fuze as in claim 5 wherein the resilient means acting upon the locking element comprise:

a reversely folded leaf spring anchored in said slider; and the slider has a greater mass on one side of the spin axis; whereby when the locking element is displaced from its locking position and the plungers are displaced from retaining contact with said slider, the slider may be displaced, by centrifugal force from its safe position to a position permitting operative contact between the igniting means and the primer charge and wherein said locking element now locks said slider in the armed position.

Claims (6)

1. A fuze for incorporation in a round of ammunition which will be linearly and angularly accelerated, relative to a central spin axis, when discharged from a gun, said fuze comprising: a slider; housing means including a guideway receiving said slider for movement in a path transverse to said spin axis; a primer charge; an igniting means; means for lockin said slider in a ''''safe'''' position preventing operative contact between the igniting means and the primer charge; said locking mean comprising: a locking element partially engaging said slider and said housing means and maintaining the slider in said ''''safe'''' position; a reversely folded leaf spring anchored in said slider, effective on said locking element in the same direction as the round of ammunition is to be linearly accelerated, for maintaining the locking element in its locking position; said slider having a passageway transverse to said guideway and receiving said locking element when the locking element is displaced from its locking position against the action of said resilient means, upon linear acceleration of said aMmunition round; whereby the locking element will only be displaced from its locking position by a predetermined linear acceleration and only maintained so displaced in said slider passageway by angular acceleration, thereby permitting movement of the slider from its ''''safe'''' position only under conditions encountered in discharge of the round of ammunition from a gun.
2. A fuze as in claim 1 wherein the locking element is a ball.
3. A fuze as in claim 1 wherein: the slider has a greater mass on one side of the spin axis, whereby when the locking element is displaced from its locking position the slider may be displaced by centrifugal force from its ''''safe'''' position to a position permitting operative contact between the igniting means and the primer charge.
4. A fuze as claim 1 further comprising: a plunger; and resilient means urging said plunger radially inwardly, relative to said spin axis, against the side of said slider in said ''''safe'''' position, thereby providing additional means for retaining said slider in its ''''safe'''' position, which means will be released only upon a spin rate producing a predetermined centrifugal force.
5. A fuze as in claim 2 further comprising: a pair of plungers; resilient means respective urging said plungers radially inwardly, relative to said spin axis, against opposite sides of said slider in said ''''safe'''' position; thereby providing additional means for retaining the slider in its ''''safe'''' position, which means will not be released upon a radial loading in only one direction relative to said spin axis.
6. A fuze as in claim 5 wherein the resilient means acting upon the locking element comprise: a reversely folded leaf spring anchored in said slider; and the slider has a greater mass on one side of the spin axis; whereby when the locking element is displaced from its locking position and the plungers are displaced from retaining contact with said slider, the slider may be displaced, by centrifugal force from its ''''safe'''' position to a position permitting operative contact between the igniting means and the primer charge and wherein said locking element now locks said slider in the armed position.
US3603259A 1968-06-26 1968-06-26 Fuze setback and angular acceleration detent Expired - Lifetime US3603259A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771457A (en) * 1972-11-13 1973-11-13 Us Army Multi-circuit safing and arming switch
US4195575A (en) * 1977-10-03 1980-04-01 Motorola, Inc. Mechanical time delay safety and arming mechanism
DE3205153A1 (en) * 1982-02-13 1983-09-08 Junghans Gmbh Geb Device for a fuse of a spin projectile
US4744298A (en) * 1986-05-09 1988-05-17 Dragolyoub Popovitch Safing and arming device and method
US4770096A (en) * 1987-08-17 1988-09-13 Honeywell Inc. Safing and arming mechanism
EP0292027A2 (en) * 1987-03-25 1988-11-23 Magnavox Government and Industrial Electronics Company Piezoelectric fuse for projectile with safe and arm mechanism
US4796532A (en) * 1987-11-12 1989-01-10 Magnavox Government And Industrial Electronics Company Safe and arm device for spinning munitions
US4869172A (en) * 1987-11-12 1989-09-26 Magnavox Government And Industrial Electronics Company Safe and arm device for spinning munitions
US4938138A (en) * 1989-08-07 1990-07-03 Honeywell Inc. Safing and arming mechanism with creep ribbon arming delay
EP0411258A2 (en) * 1989-07-29 1991-02-06 Rheinmetall Industrie GmbH Bomblet fuze
US5033382A (en) * 1987-03-25 1991-07-23 Magnavox Government And Industrial Electronics Company Piezoelectric fuse for projectile with safe and arm mechanism
WO1992012396A1 (en) * 1989-07-20 1992-07-23 Panagiotis Karamanolis Self disarming fuze for cargo munition granades
US6705231B1 (en) * 2000-12-04 2004-03-16 The United States Of America As Represented By The Secretary Of The Army Safing and arming device for artillery submunitions
US20050081732A1 (en) * 2003-06-30 2005-04-21 Marc Worthington Safety and arming apparatus and method for a munition
DE102006047551A1 (en) * 2006-10-07 2008-04-24 Junghans Microtec Gmbh Safety device for a spinning projectile fuze
US20090205526A1 (en) * 2008-01-07 2009-08-20 Nexter Munitions Micro-machined or micro-engraved safety and arming device
US20100275805A1 (en) * 2007-07-10 2010-11-04 Rastegar Jahangir S Mechanical stepper motors for gun-fired projectiles, mortars and missiles
US20110297029A1 (en) * 2010-06-06 2011-12-08 Omnitek Partners Llc Inertial igniters with safety pin for initiation with low setback acceleration
US20120000389A1 (en) * 2010-07-02 2012-01-05 Nexter Munitions Safety and arming device for projectiles inertial lock with mems technology
US8151708B2 (en) * 2008-02-08 2012-04-10 Pacific Scientific Energetic Materials Company Safe and arm mechanisms and methods for explosive devices
US20130074623A1 (en) * 2007-07-10 2013-03-28 Jahangir S Rastegar Mechanical Stepper Motors for Guided Munitions and Industrial Machinery

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045598A (en) * 1959-01-12 1962-07-24 Calvin F Brown Ball set back detent
US3264995A (en) * 1964-05-11 1966-08-09 Avco Corp Mechanical fuze operable on grazing impact

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045598A (en) * 1959-01-12 1962-07-24 Calvin F Brown Ball set back detent
US3264995A (en) * 1964-05-11 1966-08-09 Avco Corp Mechanical fuze operable on grazing impact

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771457A (en) * 1972-11-13 1973-11-13 Us Army Multi-circuit safing and arming switch
US4195575A (en) * 1977-10-03 1980-04-01 Motorola, Inc. Mechanical time delay safety and arming mechanism
DE3205153A1 (en) * 1982-02-13 1983-09-08 Junghans Gmbh Geb Device for a fuse of a spin projectile
US4744298A (en) * 1986-05-09 1988-05-17 Dragolyoub Popovitch Safing and arming device and method
US5033382A (en) * 1987-03-25 1991-07-23 Magnavox Government And Industrial Electronics Company Piezoelectric fuse for projectile with safe and arm mechanism
EP0292027A3 (en) * 1987-03-25 1990-05-09 Magnavox Government and Industrial Electronics Company Piezoelectric fuse for projectile with safe and arm mechanism
EP0292027A2 (en) * 1987-03-25 1988-11-23 Magnavox Government and Industrial Electronics Company Piezoelectric fuse for projectile with safe and arm mechanism
US4770096A (en) * 1987-08-17 1988-09-13 Honeywell Inc. Safing and arming mechanism
US4796532A (en) * 1987-11-12 1989-01-10 Magnavox Government And Industrial Electronics Company Safe and arm device for spinning munitions
EP0316043A2 (en) * 1987-11-12 1989-05-17 Magnavox Government and Industrial Electronics Company Safe and arm device for spinning munitions
US4869172A (en) * 1987-11-12 1989-09-26 Magnavox Government And Industrial Electronics Company Safe and arm device for spinning munitions
EP0316043A3 (en) * 1987-11-12 1989-11-15 Magnavox Government and Industrial Electronics Company Safe and arm device for spinning munitions
WO1992012396A1 (en) * 1989-07-20 1992-07-23 Panagiotis Karamanolis Self disarming fuze for cargo munition granades
EP0411258A2 (en) * 1989-07-29 1991-02-06 Rheinmetall Industrie GmbH Bomblet fuze
EP0411258A3 (en) * 1989-07-29 1993-03-03 Rheinmetall Gmbh Bomblet fuze
US4938138A (en) * 1989-08-07 1990-07-03 Honeywell Inc. Safing and arming mechanism with creep ribbon arming delay
US6705231B1 (en) * 2000-12-04 2004-03-16 The United States Of America As Represented By The Secretary Of The Army Safing and arming device for artillery submunitions
US20050081732A1 (en) * 2003-06-30 2005-04-21 Marc Worthington Safety and arming apparatus and method for a munition
US7258068B2 (en) * 2003-06-30 2007-08-21 Kdi Precision Products, Inc. Safety and arming apparatus and method for a munition
US7661364B2 (en) 2006-10-07 2010-02-16 Junghans Microtec Gmbh Safety and arming unit for a spinning projectile fuze
US20080210117A1 (en) * 2006-10-07 2008-09-04 Junghans Microtec Gmbh Safety and Arming Unit for a Spinning Projectile Fuze
DE102006047551A1 (en) * 2006-10-07 2008-04-24 Junghans Microtec Gmbh Safety device for a spinning projectile fuze
US20120241551A1 (en) * 2007-07-10 2012-09-27 Omnitek Partners Llc Method for stepping a first member relative to a second member associated with a projectile
US20100275805A1 (en) * 2007-07-10 2010-11-04 Rastegar Jahangir S Mechanical stepper motors for gun-fired projectiles, mortars and missiles
US20100275595A1 (en) * 2007-07-10 2010-11-04 Rastegar Jahangir S Mechanical stepper motors
US9341453B2 (en) * 2007-07-10 2016-05-17 Omnitek Partners, Llc Mechanical stepper motors for guided munitions and industrial machinery
US8513582B2 (en) * 2007-07-10 2013-08-20 Omnitek Partners Llc Method for stepping a first member relative to a second member associated with a projectile
US8110785B2 (en) * 2007-07-10 2012-02-07 Omnitek Partners Llc Mechanical stepper motors for gun-fired projectiles, mortars and missiles
US20130074623A1 (en) * 2007-07-10 2013-03-28 Jahangir S Rastegar Mechanical Stepper Motors for Guided Munitions and Industrial Machinery
US8193754B2 (en) * 2007-07-10 2012-06-05 Omnitek Partners Llc Mechanical stepper motors
US8166880B2 (en) * 2008-01-07 2012-05-01 Nexter Munitions Micro-machined or micro-engraved safety and arming device
US20090205526A1 (en) * 2008-01-07 2009-08-20 Nexter Munitions Micro-machined or micro-engraved safety and arming device
US20120210898A1 (en) * 2008-02-08 2012-08-23 Pacific Scientific Energetic Materials Materials Company (California), LLC Safe And Arm Mechanisms And Methods For Explosive Devices
US8151708B2 (en) * 2008-02-08 2012-04-10 Pacific Scientific Energetic Materials Company Safe and arm mechanisms and methods for explosive devices
US9562755B2 (en) * 2008-02-08 2017-02-07 Pacific Scientific Energetic Materials Company Safe and arm mechanisms and methods for explosive devices
US20110297029A1 (en) * 2010-06-06 2011-12-08 Omnitek Partners Llc Inertial igniters with safety pin for initiation with low setback acceleration
US20120000389A1 (en) * 2010-07-02 2012-01-05 Nexter Munitions Safety and arming device for projectiles inertial lock with mems technology
US8656837B2 (en) * 2010-07-02 2014-02-25 Nexter Munitions Safety and arming device for projectiles inertial lock with MEMS technology

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