Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7578227 | Fire control mechanism for selectable fire A fire control mechanism provides semi-automatic, burst, fully automatic, and safe modes for a firearm. The fire control mechanism includes first, second and third shafts. A hammer is rotatably mounted on the first shaft and biased for rotation about the first shaft... | 08/25/2009 |
| 7040213 | Firearm receiver system with belt-feed capability A firearm receiver system including a receiver body, an ammunition belt feeding assembly and a bolt carrier. The receiver body includes a first face and a second face approximately opposite the first face. The receiver body is configured for having means for trigger... | 05/09/2006 |
| 6976416 | Solid-state full auto sear A firing mechanism includes a hammer, an electrical solid-state full auto sear positioned to engage the hammer in a first electrical state and to disengage from the hammer in a second electrical state, and a controller connected to the electrical solid-state full au... | 12/20/2005 |
| 6415702 | Double action semi-automatic handgun A 1911A1 model style handgun that includes a double action trigger assembly. The hammer of the handgun is cocked and released by a drawbar mounted internally to the frame. The handgun also includes a grip mounted safety device to prevent accidental discha... | 07/09/2002 |
| 6125735 | Self-loading weapon A fully automatic self-loading weapon is disclosed. The weapon has a functional part that can be moved by the release of a round, and a connectable and disconnectable single-shot device which, when activated, causes release of one shot for every actuation... | 10/03/2000 |
| 5913261 | Trigger arrangement A trigger arrangement for an automatic weapon with switch-over between continuous firing and single-shot modes includes a hammer, a breechblock, a latch, a pivotably mounted trigger, and a firing lever. In the single-shot mode, the firing lever engages th... | 06/15/1999 |
| 5623114 | Selectable fire trigger mechanism An improved trigger mechanism for weapons having full automatic fire capability. Exertion of a first predetermined trigger pressure enables the disconnector to engage the hammer in a semi-automatic fire mode. Exertion of a second, greater trigger pressure... | 04/22/1997 |
| 5355768 | Automatic pistol with select fire mechanism A select fire automatic pistol comprising: a frame; a slide with a breech-block in the rear which slides on the frame over the barrel to form a cartridge receiving chamber; a floating barrel in the slide having a cartridge receiving rear; a trigger safety... | 10/18/1994 |
| 4941394 | Hand-held automatic firearm The trigger mechanism of a hand-held automatic firearm comprises a catch lever, which is pivoted on a transverse axis and is provided at its forward end with a pivoted catch pawl, which in a catching position engages a catching lug of a slider to arrest t... | 07/17/1990 |
| 4876943 | Automatic machine gun To permit single firing in a machine gun by a mechanical method, a trip lever is moved by a control surface attached to the weapon housing during the weapon recoil after triggering a shot. This motion causes the trip lever to disengage a coupling on the c... | 10/31/1989 |
| 4833970 | Submachine gun The sub machine gun fires single shots in semi automatic fashion, and also fires fully automatically, with the firing mode being manually selectable. The firing mode selection also includes a safe setting, and there is a grip safety which renders the gun ... | 05/30/1989 |
| 4664015 | Automatic gun with improved firing mechanism A gun which has an improved firing mechanism which enables it to be completely automatic through ejection of the magazine by eliminating the need for a selector switch. The firing mechanism has a substantially J-shaped hammer with a sear embedded therein.... | 05/12/1987 |
| 4523510 | Combined selector, safety and trigger assembly for automatic firearms A full automatic firearm or submachine gun has a combined trigger, sear and selector mechanism including automatic and semi-automatic bars which are pivoted at their forward end to the trigger, and a sear member disposed therebetween and independently piv... | 06/18/1985 |
| 4448109 | Automatic or semi-automatic firearm A firearm including a basic action system having differential recoil, blow-back operation with moving barrel and a firing mechanism for use in conjunction with the basic action system of the invention or any other type of system operable to fire from a cl... | 05/15/1984 |
| 4095507 | Combat firearm This invention relates to firearms of the type disclosed in my prior U.S. Pat. No. 3,424,053, granted Jan. 28, 1969, in which the principal parts such as actuating sleeve, receiver, frame and breechblock are made from cylindrical extruded metal tubing and... | 06/20/1978 |
| 3964368 | Automatic pistol An improved automatic pistol is provided with a lever mechanism which causes operation as a burst-firing arm in a safe and reliable manner. This is achieved by forming the disconnector, which releases the sear, with a chamfered and bent end, opposite to t... | 06/22/1976 |
