Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 5625161 | Safety device for a spin stabilized projectile fuse, process for making such a safety device and spin-stabilized fuse having such a safety device A safety device to lock a firing pin of a spin-stabilized projectile fuse includes a flexible strip and a spiral spring. The flexible strip is disposed around the firing pin and has a first end, a second end and a length. The flexible strip is made of an ... | 04/29/1997 |
| 5243912 | Arming delay, dual environment safe, fuze This invention provides a safing and arming mechanism for a fuze for a spinning projectile including a ball rotor journaled for rotation within a cavity in the fuze. A firing pin, said cavity and a booster charge lie along the longitudinal axis of the fuz... | 09/14/1993 |
| 5147974 | Unwinding ribbon safing and arming device In a weapon subject to linear acceleration and spin, including a detonator and an explosive charge, the safing and arming device comprising a housing, a setback spring configuration restraining a ribbon spiral unwinder, and a detonator-enabling circuit wh... | 09/15/1992 |
| 5067405 | Safing and arming device In a weapon subject to a sequence of high acceleration followed by high spin and including a detonator and an explosive charge; the improvement comprising a barrier having two parts located between the detonator and explosive charge to normally form an ob... | 11/26/1991 |
| 4938139 | After-firing safety device in a projectile with percussion fuze An after-firing safety device in a projectile with percussion fuze includes a spiral spring set having at least three springs wound up in series with respectively opposite directions. The spring set, maintained under tension by a cage, starts to uncoil as... | 07/03/1990 |
| 4800814 | Arming devices An arming device for a missile having a rotating tail fin assembly is disclosed. The device includes a distance counter comprising a given length of coiled tape contained within a rotatable drum, the length of the tape being determined by the distance req... | 01/31/1989 |
| 4773330 | Dynamic armed grenade The present invention provides a grenade with dynamic arming having a body and a fuse, in which arming of the fuse is made dependent on the dynamic unwinding of a ribbon which surrounds the fuse and which is weighted with an inertia block at the end of wi... | 09/27/1988 |
| 4662279 | Safing and arming device In a weapon subject to a sequence of high acceleration followed by high spin and including a detonator and an explosive charge; the improvement comprising a barrier located between the detonator and explosive charge to normally form an obstruction to prev... | 05/05/1987 |
| 4622898 | Spin activated mechanism The mechanism consists of a one coil spring disposed a spaced distance about the inner circumference of a cylindrical housing; and a lever pivotally attached to said housing. When the device is subjected to centrifugal forces the coil is forced outward to... | 11/18/1986 |
| 4612858 | Fuse for a satellite projectile The invention relates to a fuse for a satellite projectile that is expelled from a carrier projectile. In order to maintain a defined ignition time within narrow tolerances, despite initial blind position of the fuse immediately after the expulsion of the... | 09/23/1986 |
| 4535695 | Fuse for a spin-type projectile A fuse is used in a spin-type projectile. A percussion cap is mounted in a rotor which is normally disposed in a safety position. Rotation of the rotor to a firing position wherein the percussion cap is aligned with a firing pin is prevented by two indepe... | 08/20/1985 |
| 4510869 | Rotating cage security device for a gyratory projectile The security device of the invention comprises a movable organ in the interior of a cage mounted for rotation with respect to the body of a projectile, the movable organ being temporarily blocked from such rotation around the axis of gyration by at least ... | 04/16/1985 |
| 4467723 | Coil strip safety device for spinning projectiles A fuze for a spinning projectile has a firing pin which is held against movement by a safety device until the projectile has traveled a preset distance. The safety device comprises a coil spring strip which overlies the firing pin in its initially coiled-... | 08/28/1984 |
| 4458594 | Fuse with a detonator In small-caliber, barreled-weapon ammunition with head or base fuses, detonator safety is achieved in that the inadvertantly ignited detonator which is a secure position within a rotor remains without effect on an intensifying charge. Measures are provide... | 07/10/1984 |
| 4449456 | Safety device for a projectile A safety device for a projectile, adapted to make a barrier between an ignition charge in the forward end of the projectile and one or more incendiary and/or explosive charges situated behind the ignition charge. The device comprises two discs having conc... | 05/22/1984 |
| 4440085 | Safety apparatus for spinning projectile fuzes A spinning projectile fuze contains a rotor which is retained by a safety spring in the form of a substantially ring-shaped disk in a safety or unarmed position. To enable the ring-shaped disk to release the rotor it must be pressed flat both by the firin... | 04/03/1984 |
| 4432283 | Projectile fuse responsive to the spinning motion of a projectile A projectile fuse has two activating devices acting independent of each other. One of the devices includes a plurality of wafer-like sectors which are retained together as a unitary disk by means of a coil spring having 1.5 to 2 convolutions. The disk is ... | 02/21/1984 |
| 4242963 | Delayed arming fuze for a spinning projectile The provision of a delayed arming fuze utilizing a ball rotor, and a firing pin which is captured to the ball rotor by an unwinding ribbon, and which pin precludes the rotor from swinging into alignment for arming until the ribbon has unwound under the se... | 01/06/1981 |
| 3995557 | Base fuze for a spinning projectile A base fuze for a spinning projectile comprising a firing pin for piercing a detonator cap, a hammer sleeve secured to the firing pin, a self-destruction spring by means of which the hammer sleeve together with the firing pin can be displaced towards the ... | 12/07/1976 |
| 3994230 | Self-destruction type nose impact fuze for spinning projectiles A self-destruction-type nose impact fuze for spinning projectiles comprising an axially displaceable firing pin which can be brought to bear at an axially displaceable impact body against the force of a self-destruction spring through the agency of centri... | 11/30/1976 |
| 3954061 | Safety device on electric projectile fuses A safety device for an electrically operable projectile fuse in which a primer pin in the form of a firing pin is axially displaceable in the projectile while a detonator cap near one end of the primer pin is adapted to be ignited by impact of the primer ... | 05/04/1976 |
