41 |
Delay units and methods of making the same |
US11348698 |
2006-02-06 |
US20060236887A1 |
2006-10-26 |
John Childs; Lawrence Shank |
A delay unit (10) comprises a timing strip (14) and, optionally, a calibration strip (20) deposited on a substrate (12). The timing and calibration strips comprise energetic materials which optionally may comprise particles of nanosize materials, e.g., a fuel and an oxidizer, optionally applied as separate layers. A method of making the delay units comprises depositing onto a substrate (12) a timing strip (14) having a starting point (14d) and a discharge point (14e) and depositing onto the same or another substrate a calibration strip (20). Timing strip (14) and calibration strip (20) are of identical composition and are otherwise configured, e.g., thickness of the strips, to have identical burn rates. The calibration strip (20) is ignited and its burn rate is ascertained. The timing strip (14) is adjusted by an adjustment structure to attain a desired delay period, preferably on the basis that the burn rate of the timing strip (14) is substantially identical to that of the calibration strip (20) and ascertaining the burn rate of the calibration strip. The adjustment may be attained by one or more of providing the timing strip with jump gaps (164), an accelerant or retardant (166a, 166b), completing the timing strip with a bridging strip (14c), or establishing a selected effective length of the timing strip by positioning one or both of a pick-up charge (16) and relay charge (18) over a portion of the timing strip. |
42 |
Cartridge format delay igniter |
US09514258 |
2000-02-28 |
US06470806B1 |
2002-10-29 |
Kenneth R. Murray |
A training device for simulating the action of stun grenades and the like is provided by combining a delay cartridge with a conversion fitting that installs in a grenade body. A firing assembly fitted to the grenade body over the delay cartridge is percussively initiated through release of a hammer to activate a primer located on the end of the cartridge. The cartridge contains a delay-burning compound that subsequently activates a pyrotechnic charge. A suitable application is for training in the use of flash/bang training devices or “stun” grenades. |
43 |
Time delay fuse |
US356187 |
1964-03-31 |
US3981222A |
1976-09-21 |
Donald E. Bowman |
1. A method of making a time delay fuse comprising the steps of overlaying a fuse strip consisting essentially of a paper formed of non-combustible insulating fibers filled with a combustible compositon which evolves substantially no gas on burning with a backing strip wider than said fuse strip consisting essentially of a paper formed from non-combustible insulating fibers, both ends of said fuse strip extending beyond and normal to said backing strip, winding said overlaid fuse strip in a flat spiral around the circumference of a cylindrical core formed from non-combustible insulating fibers to form a cylindrical body having said both fuse strip ends exposed on the surface of said core while maintaining a high water content in said fuse strip, backing strip and core, axially compressing said body to form a compact, and drying said compact. |
44 |
|
US35618764 |
1964-03-31 |
USB356187I5 |
1976-01-20 |
|
|
45 |
Initiator assembly |
US33726773 |
1973-03-01 |
US3830158A |
1974-08-20 |
DI PHILLIPO J; HOLVOET J |
An initiator assembly having a pyrotechnic time delay which can be adjusted to any selected time delay setting within the adjustable range. A male adjustment screw, secured to a firing head assembly, has an internal cavity filled with booster propellant charges and is threadedly attached to the female threads of a flange nut. The adjustment screw has a lateral orifice fluidily communicating the cavity with the exterior surface or crest of a forwardmost male thread portion and a selected surface portion along a pyrotechnic fuze that lines the helically contoured root of the female threads and is embedded in the main propellant charge.
|
46 |
Ignition device in a rocket assisted projectile |
US3713389D |
1970-10-12 |
US3713389A |
1973-01-30 |
HJELM K |
An ignition device for a rocket-assisted projectile to be fired from a gun comprises a detonator which when activated ignites a delay composition of a kind burning without flame and without generating hot gases, and a support for a composition of the type burning when activated non-explosively with a hot flame for a prolonged period of time. This support is movable by the centrifugal force acting upon it when the projectile is fired and spins, from a rest position to an active position in which the composition on the support is ignited by the heat of the burning delay composition. The burning of the composition on the support member in turn, ignites via an also non-explosively burning priming charge the propellant fuel of the rocket motor of the rocket-assisted projectile.
|
47 |
Pyrotechnic coiled delay cord assembly for hand grenade fuze |
US3705552D |
1971-02-08 |
US3705552A |
1972-12-12 |
LERMAN RUSSELL E |
An improved hand grenade fuze that has an out-of-line metal sheathed pyrotechnic delay cord helically wound about a mandrel. The delay cord forms the threads of a delay-detonator assembly which cannot be screwed into the fuze head unless the delay cord is present thereby insuring the presence of the delay element.
|
48 |
Fuze with impact switch |
US3580176D |
1968-02-28 |
US3580176A |
1971-05-25 |
BOSWELL GEORGE T |
An impact weight is releasably engaged, supported, and caged by a plurality of springlike supports which also releasably engage a spring-loaded operator and hold it in the cocked position. The weight moves in response to impact or a predetermined level of vibration to dislodge the supports and allow the operator to be driven home by the spring. In the fuze, a safety slide locks the supports until removed by the action of an explosive or mechanical delay mechanism. Once the supports are unlocked the weight is free to move upon impact, then dislodging the supports and allowing the operator to strike a detonator to fire the weapon. Should there be little or no impact, the delay train causes the operator to be released after a predetermined interval notwithstanding the position of the supports.
|
49 |
Time delay fuse element |
US71584558 |
1958-02-12 |
US3025795A |
1962-03-20 |
SUTTON JR ERNEST SHAW; REILLY HUGH T; GEORGE BERMAN MAX; ARNOLD IRWIN |
|
50 |
Self-propelled projectile |
US79071159 |
1959-02-02 |
US3008414A |
1961-11-14 |
JASSE JOSEPH R |
|
51 |
Self-propelled projectile |
US73247058 |
1958-05-02 |
US2944486A |
1960-07-12 |
RAYMOND JASSE JOSEPH |
|
52 |
Ammunition time fuse |
US48198943 |
1943-04-06 |
US2405085A |
1946-07-30 |
ZAPPONE CHARLES F |
|
53 |
Fuse |
US55531031 |
1931-08-05 |
US2397781A |
1946-04-02 |
FISCHER MAX W |
|
54 |
Fuse |
US31614640 |
1940-01-29 |
US2359777A |
1944-10-10 |
MOORE WILEY T |
|
55 |
Fuse for projectiles and particularly for small caliber high explosive projectiles |
US70402233 |
1933-12-26 |
US2005053A |
1935-06-18 |
VALENTIN SCHLAFER |
|
56 |
Water bomb |
US41388220 |
1920-09-30 |
US1449128A |
1923-03-20 |
HERMANN PAPE MAX CARL AUGUST |
|
57 |
Detonator-fuse |
US26908318 |
1918-12-31 |
US1336391A |
1920-04-06 |
SEMPLE JOHN B |
|
58 |
Improvement in time-fuses for explosive shells |
US46965D |
|
US46965A |
1865-03-21 |
|
|
59 |
Improved fuse-hood for shells |
US34040D |
|
US34040A |
1861-12-24 |
|
|
60 |
CARTRIDGE FORMAT DELAY IGNITER |
PCT/CA0100202 |
2001-02-21 |
WO0165200A2 |
2001-09-07 |
MURRAY KENNETH R |
A training device for simulating the action of stun grenades and the like is provided by combining a delay cartridge with a conversion fitting that installs in a grenade body. A firing assembly fitted to the grenade body over the delay cartridge is percussively activated through release of a hammer to activate a primer located on the end of the cartridge. The cartridge contains a delay-burning compound that subsequently activates a pyrotechnic charge. A suitable application is for training in the use of flash/bang training devices or "stun" grenades. |