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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6584773 | Projectiles to trigger avalanches A projectile for being propelled along a trajectory by propellant gases inside a launcher tube, the projectile including a casing, first pressure means for first pressurizing the casing without exploding the casing during firing of the projectile, and sec... | 07/01/2003 |
| 6301892 | Electric ignition type gas generation apparatus An electric ignition type gas generation apparatus for use in a vehicle crash safety system includes an ignition section that is ignited by an electric signal produced by the impact of a crash, and a gas generating section in which burning gas is generate... | 10/16/2001 |
| 5611205 | Apparatus for igniting a propellant charge in a tool A tool for driving a nail or other fastener is actuated by a caseless propellant charge formed of combustible material that is transported into a combustion chamber on a strip. The propellant charge is ignited by striking a sensitizer portion of the charg... | 03/18/1997 |
| 5029776 | Variable explosive source for an ejector system An explosive source for a store ejector system, having a plurality of explosive cartridges that are sequentially detonated to provide a relatively constant force on the store, when the store is ejected. Operatively connected to each explosive cartridge, i... | 07/09/1991 |
| 4669354 | Fully redundant mechanical release actuator A system is disclosed for performing a mechanical release function exhibiting low shock and includes two pyrotechnic detents fixed mounted in opposing axial alignment within a cylindrical housing having two mechanical bellows, each bellows having one end ... | 06/02/1987 |
| 4412419 | Fluid supply systems The invention relates to a fluid supply system and seeks to provide a simpler, safer but reliable system than at present known. The fluid supply system comprises a multi-charge solid propellant gas generator and a fluid explusion unit integrated into a si... | 11/01/1983 |
| 4372122 | Propellant operator An operator in which a plurality of explosive propellant cartridges are received in individual chambers and may be rapidly fired one at a time in sequence. The cartridges are fired by an electric current sequentially directed to the cartridges by a distri... | 02/08/1983 |
| 4308721 | Fluid supply systems The invention relates to a fluid supply system and seeks to provide a simpler, safer but reliable system than at present known. The fluid supply system comprises a multi-charge solid propellant gas generator and a fluid expulsion unit integrated into a si... | 01/05/1982 |
| 4271341 | Circuit breaker operating mechanism A circuit interrupter characterized by a pair of separable contacts, operating means for opening and closing the contacts and comprising a piston for opening the contacts, the piston being operative at a range of 3,000 to 10,000 psi, generating means comp... | 06/02/1981 |
| 4251701 | Circuit interrupter A circuit interrupter characterized by a pair of separable contacts with operating means for opening and closing the contacts and comprising a cylinder and piston mechanism which cylinder has opening means at each end of the cylinder chamber. Rotatable me... | 02/17/1981 |
| 4209983 | Internal electric explosion engine An internal explosion engine, having a vessel with an interior space and inlets and outlets for respectively introducing fluid into said space at relatively low pressure and removing said fluid from said space at relatively high pressure; an electric disc... | 07/01/1980 |
| 4112685 | Loading device for a power actuated tool A loading device for a power-actuated tool which comprises a fixed support having an open recess adapted to receive the open end of a tubular propellant charge-retaining holder. A movable charge transporter is mounted on the exterior of the tool and conta... | 09/12/1978 |
| 3990407 | Explosively powered rotary tool An explosively powered tool or wrench is described that is operable under water and provides high torque, approaching that of an impact wrench, through the detonation of small charges to generate pressure for driving pistons of an expansible chamber motor... | 11/09/1976 |
