Chamber Status Patents (Class 42/1.05)
  • Patent number: 9810499
    Abstract: A firearm safety round configured to function as a safety round for the following firearms: SAR 21—Singapore Assault Rifle-21st Century and M-16 rifle. The safety round includes a cylindrical rear end having a rim, a mid-section adjacent the rear end opposite the rim, the mid-section comprises a truncated cylinder having opposite flat sides, a tab extending outwardly from the mid-section and configured so that when the safety round is received by the firing chamber, the tab will extend out of the firing chamber to visually indicate that the firing chamber of the firearm is free of live ammunition and a cylindrical nose portion extending from the mid-section, opposite from the rear end and longitudinally aligned therewith.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: November 7, 2017
    Assignee: Safe Tech, Inc.
    Inventor: H. Steven Silver
  • Patent number: 9813828
    Abstract: A speaker system with acoustic event detection, the speaker system including a number of speakers, a head unit including an output circuit structured to output an output signal to the speakers to cause the speakers to output an audible sound, and an acoustic event detection module structured to receive signals from the speakers and to detect an acoustic event based on the signals received from the speakers.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: November 7, 2017
    Assignee: Eaton Corporation
    Inventors: Joseph Rudy Keller, Scott Case
  • Patent number: 9310149
    Abstract: This invention is directed to a firearm safety device that has a chamber block for being received in a chamber of a firearm. An internal area is defined in the chamber block and can receive a bullet so that the bullet biases the outer walls outward. A visual indicator is attached to a distal end of the chamber block and is received in the bore of the barrel and extending outward past the muzzle providing a visual indication that the firearm is in a safe condition. In one embodiment, the chamber block can be inserted into the muzzle and the visual indicator extends through the barrel and chamber and out of the ejection port of magazine well. The visual indicator can be modifiable in length to accommodate various lengths of barrels and can be flexible.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: April 12, 2016
    Inventor: William E. Masters
  • Patent number: 9068785
    Abstract: A chamber status indicator for a firearm such as a handgun, rifle, or shotgun is disclosed. The chamber status indicator comprises a self-illuminating substance such as a gaseous tritium light source or self-illuminating paint, wherein light from the self-illuminating substance is visible only when a cartridge is loaded in the chamber. The self-illuminating substance can be mounted in a mechanical chamber status indicator. The self-illuminating substance can be mounted in a wall of the chamber. The self-illuminating substance can be mounted in a cartridge extractor. The self-illuminating substance can be affixed to or integrated into a bolt, breech or slide of the firearm. The self-illuminating substance can be integrated into a cylinder containing multiple chambers.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: June 30, 2015
    Inventor: Michael Leroy Ball
  • Patent number: 8850738
    Abstract: A combination firearm safety round that is configured to have tool features compatible for performing maintenance on the firearm. The safety round includes a cylindrical body portion having a small diameter extension having a substantially flat distal end, such that the extension is suitable as a tool for field stripping and maintenance of the firearm.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: October 7, 2014
    Assignee: Safe Tech, Inc.
    Inventor: H. Steven Silver
  • Publication number: 20140283426
    Abstract: A handgun curved to correspond more closely with the contours of a person's body, achieving a comfortable fit when the handgun is worn for any appreciable amount of time on the person's body. The handgun housing is inclusive of a top portion, an intermediate portion, and a grip portion, which may be separately connected or integrally formed parts sharing a radius of curvature to form asymmetric left and right sides, particularly a concave side and a convex side. This asymmetry extends beyond the grip portion and includes at least a portion of the trigger guard and a portion of the magazine securing clip.
    Type: Application
    Filed: April 21, 2014
    Publication date: September 25, 2014
    Applicant: Taurus International Manufacturing Inc.
    Inventors: Mark Kresser, Marcelo de Albuquerque Knorst, Leonardo Brum Sesti
  • Publication number: 20140190051
    Abstract: Subject matter disclosed herein relates to an apparatus, device, or method for detecting aim or pointing direction of a firearm, the method comprising detecting a sound signature of a gunshot from the firearm; sensing an aim direction of the firearm substantially at the time of detecting the sound signature of the gunshot; setting a reference direction based, at least in part, on the aim direction; sensing a current aim direction of the firearm; comparing the current aim direction to the reference direction; and initiating an alarm if the current aim direction is beyond a threshold angle of displacement from the reference direction.
    Type: Application
    Filed: March 15, 2013
    Publication date: July 10, 2014
    Inventor: Brian Donald Wichner
  • Publication number: 20130180144
    Abstract: A handgun curved to correspond more closely with the contours of a person's body, achieving a comfortable fit when the handgun is worn for any appreciable amount of time on the person's body. The handgun housing is inclusive of a top portion, an intermediate portion, and a grip portion, which may be separately connected or integrally formed parts sharing a radius of curvature to form asymmetric left and right sides, particularly a concave side and a convex side. This asymmetry extends beyond the grip portion and includes at least a portion of the trigger guard and a portion of the magazine securing clip.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 18, 2013
    Applicant: FORJAS TAURUS S/A
    Inventor: Forjas Taurus S/A
  • Publication number: 20120297655
    Abstract: A self-illuminated chamber status indictor, or simply illuminated chamber status indicator (icsi). The illuminated chamber status indicator makes use of self-illuminating substances. The substances and/or materials could be in the form of radioactive gaseous isotopes, or self-illuminating paint. The illuminated chamber status indicator will leverage in any form of current self-illumination technologies that require no external power source in order to give off light emissions. The illuminated chamber status indicator will use the properties of radioluminescence as a primary, but not exclusive source to create such attributes.
    Type: Application
    Filed: February 14, 2012
    Publication date: November 29, 2012
    Inventor: Michael Leroy Ball
  • Patent number: 8245426
    Abstract: An article including an article including a firearm including a safety that moves between a safe position that does not permit firing of the firearm and a fire position that permits firing of the firearm, the firearm further including a light indicator, and a loaded chamber indicator in electrical communication with the light indicator, wherein when the safety moves to the fire position, the light indicator emits a first distinct color if a round is loaded in a chamber of the firearm, and the light indicator emits a second distinct color if a round is not loaded in the chamber of the firearm.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: August 21, 2012
    Inventor: Dov Pikielny
  • Patent number: 8176667
    Abstract: A system for resolving at least one use parameter relating to a firing of a machinegun or of a semi-automatic firearm having a receiver, an action within the receiver and that includes a piston, and a buffer tube that receives at least a portion of the piston during a cycling of the action in response to a recoil. The system includes: a display configured to display at least an indication of at least one use parameter; a sensor disposed in the buffer tube, the sensor sensing a cycling of an action via movement of the piston in the buffer tube; a processor that receives sensed data from the sensor and, based on the received sensed data, calculates the at least one use parameter, the processor causing the display to display the at least an indication; and a power source disposed in the stock or the display and energizing the sensor, the processor, and the display.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: May 15, 2012
    Inventors: Ibrahim Kamal, Chi-Jen Wong
  • Patent number: 8109023
    Abstract: A shot counter includes a firearm with a loaded chamber indicator and a striker status indicator. A first switch operates with the loaded chamber indicator and a second switch operates with the striker status indicator. When the loaded chamber indicator moves it activates the first switch and when the striker status indicator moves it activates the second switch. If one of the first and second switches is activated, an electrical signal is sent to a processor and the processor interprets the electrical signal as an indication that a shot has been fired. If the electrical signal is from the first switch, the processor actually counts a number of cartridges going in and out of a chamber of the firearm, and if the electrical signal is from the second switch, the processor actually counts a number of times the firearm was cocked.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: February 7, 2012
    Inventor: Dov Pikielny
  • Patent number: 8028454
    Abstract: Loaded chamber indicator systems semi-automatic handguns wherein a loaded chamber indicator is extended by the empty cartridge ejector when the empty cartridge ejector rests on a cartridge in the handgun chamber. In one embodiment, the loaded chamber indicator is in an opening or hole in the back of the slide, with the inner end of the loaded chamber indicator being enlarged and fitting within an inclined slot in the empty cartridge extractor so as to be extended or retracted dependent on whether the empty cartridge ejector rests on a cartridge in the handgun chamber. The empty cartridge extractor may be mostly molded plastic with a metal end for engaging cartridges, and the loaded chamber indicator may be entirely molded plastic. Multiple embodiments are disclosed.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: October 4, 2011
    Inventor: James V. Pontillo, II
  • Patent number: 7908779
    Abstract: A handgun has at least one barrel; a cartridge chamber; a gun lock correlated with the cartridge chamber and provided with a hammer to be cocked against a spring force into a cocked position and with a trigger for releasing the hammer from the cocked position. First and second electric or electronic sensor devices are provided. The first sensor device recognizes whether the hammer is cocked. The second sensor device recognizes whether a cartridge is in the cartridge chamber. At least one light illuminates when the hammer of the gun lock is cocked; when a cartridge is inserted in the cartridge chamber; or when both of these conditions are fulfilled. A mechanical locking and unlocking device acts on the hammer. In a locking position it secures the hammer in the uncocked position. It is electrically operable by a battery and is in the locking position when currentless.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: March 22, 2011
    Assignee: Armatix GmbH
    Inventor: Edelbert Wasmer
  • Publication number: 20100229443
    Abstract: A handgun has at least one barrel; a cartridge chamber; a gun lock correlated with the cartridge chamber and provided with a hammer to be cocked against a spring force into a cocked position and with a trigger for releasing the hammer from the cocked position. First and second electric or electronic sensor devices are provided. The first sensor device recognizes whether the hammer is cocked. The second sensor device recognizes whether a cartridge is in the cartridge chamber. At least one light illuminates when the hammer of the gun lock is cocked; when a cartridge is inserted in the cartridge chamber; or when both of these conditions are fulfilled. A mechanical locking and unlocking device acts on the hammer. In a locking position it secures the hammer in the uncocked position. It is electrically operable by a battery and is in the locking position when currentless.
    Type: Application
    Filed: March 21, 2007
    Publication date: September 16, 2010
    Applicant: ARMATIX GMBH
    Inventor: Edelbert Wasmer
  • Patent number: 7774970
    Abstract: A pistol including a loaded chamber indicator to identify the presence of a cartridge loaded in the firing chamber. The pistol may generally include a barrel, a receiver attached to the barrel thereby defining a barrel-receiver assembly, and a chamber associated with the barrel-receiver assembly. An indicating element is provided which in one embodiment may be pivotally mounted in the barrel-receiver assembly. The indicating element is displaceable in response to contact by the cartridge from a first position which may in one embodiment correspond to an absence of a cartridge loaded in the chamber, to a second position which may in one embodiment correspond to a presence of a cartridge loaded in the chamber. A biasing member, such as a spring, may be provided to bias the indicating element towards the first position.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: August 17, 2010
    Assignee: Sturm, Ruger & Co., Inc.
    Inventor: James McGarry
  • Publication number: 20100192438
    Abstract: A pistol including a loaded chamber indicator to identify the presence of a cartridge loaded in the firing chamber. The pistol may generally include a barrel, a receiver attached to the barrel thereby defining a barrel-receiver assembly, and a chamber associated with the barrel-receiver assembly. An indicating element is provided which in one embodiment may be pivotally mounted in the barrel-receiver assembly. The indicating element is displaceable in response to contact by the cartridge from a first position which may in one embodiment correspond to an absence of a cartridge loaded in the chamber, to a second position which may in one embodiment correspond to a presence of a cartridge loaded in the chamber. A biasing member, such as a spring, may be provided to bias the indicating element towards the first position.
    Type: Application
    Filed: April 30, 2008
    Publication date: August 5, 2010
    Applicant: STURM, RUGER & COMPANY, INC.
    Inventor: James McGarry
  • Publication number: 20100139142
    Abstract: An article including an article including a firearm including a safety that moves between a safe position that does not permit firing of the firearm and a fire position that permits firing of the firearm, the firearm further including a light indicator, and a loaded chamber indicator in electrical communication with the light indicator, wherein when the safety moves to the fire position, the light indicator emits a first distinct color if a round is loaded in a chamber of the firearm, and the light indicator emits a second distinct color if a round is not loaded in the chamber of the firearm.
    Type: Application
    Filed: February 16, 2010
    Publication date: June 10, 2010
    Inventor: Dov Pikielny
  • Publication number: 20100139141
    Abstract: A method including sensing movement of an existing non-shot-indicator of a handgun, and interpreting a sensed movement of the existing non-shot-indicator as a shot fired from the handgun so that the sensed movement serves as a shot counter for the handgun.
    Type: Application
    Filed: February 16, 2010
    Publication date: June 10, 2010
    Inventor: Dov Pikielny
  • Patent number: 7661217
    Abstract: A method including sensing movement of an existing non-shot-indicator of a handgun, and interpreting a sensed movement of the existing non-shot-indicator as a shot fired from the handgun so that the sensed movement serves as a shot counter for the handgun.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: February 16, 2010
    Inventor: Dov Pikielny
  • Patent number: 7661218
    Abstract: Firearm that includes a safety that doubles as an on-off switch for electrical accessories.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: February 16, 2010
    Inventor: Dov Pikielny
  • Publication number: 20100000137
    Abstract: A firearm with a stock having an exterior contour that is generally symmetric with respect to opposing end portions, a front edge portion and at least a portion of opposing side surfaces. A barrel extends through the front edge portion of the stock. Two safety release buttons are diametrically opposed to each other with respect to a barrel bore centerline axis and are exposed at a front edge portion of the stock. Two firing mechanism release buttons are each exposed at an exterior surface of the stock at a respective one of the opposing end portions. The firing mechanism actuation buttons are diametrically opposed to each other with respect to the barrel bore centerline axis. Firing of the firearm requires both of the safety release buttons to be depressed thereby allowing either of the firing mechanism actuation buttons to be depressed for firing the firearm.
    Type: Application
    Filed: June 5, 2009
    Publication date: January 7, 2010
    Inventors: Matthew Morman Carmel, Trent A. Warncke
  • Patent number: 7610709
    Abstract: An antidismantling device for preventing dismantling of a hand-gun when a cartridge is present in the barrel (102) of the hand-gun, the barrel (102) being mounted in a breech block (110), and a guide pin (123), which is biased at least indirectly in the direction of the longitudinal axis of the barrel (102), is slidably mounted in a bearing (113) in the breech block (110), and one end of the guide pin at least indirectly abuts a contact surface (121) for making contact with part of a cartridge (101), and the position of the guide pin in relation to the breech block (110) when a cartridge (101) is present in the barrel (102) differs from the position thereof assumed in the absence of a cartridge (101) in the barrel (102) is created in that the guide pin (123) interacts at least indirectly with a safety mechanism (141) provided on the grip of the hand-gun in order to prevent dismantling of the breech block (110) when a cartridge (101) is present in the barrel (102) of the handgun.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: November 3, 2009
    Assignee: Carl Walther GmbH
    Inventors: Stefan Eith, Wulf-Heinz Pflaumer, Franz Wonisch
  • Publication number: 20090217564
    Abstract: An antidismantling device for preventing dismantling of a hand-gun when a cartridge is present in the barrel (102) of the hand-gun, the barrel (102) being mounted in a breech block (110), and a guide pin (123), which is biased at least indirectly in the direction of the longitudinal axis of the barrel (102), is slidably mounted in a bearing (113) in the breech block (110), and one end of the guide pin at least indirectly abuts a contact surface (121) for making contact with part of a cartridge (101), and the position of the guide pin in relation to the breech block (110) when a cartridge (101) is present in the barrel (102) differs from the position thereof assumed in the absence of a cartridge (101) in the barrel (102) is created in that the guide pin (123) interacts at least indirectly with a safety mechanism (141) provided on the grip of the hand-gun in order to prevent dismantling of the breech block (110) when a cartridge (101) is present in the barrel (102) of the handgun.
    Type: Application
    Filed: January 26, 2007
    Publication date: September 3, 2009
    Inventors: Stefan Eith, Wulf-Heinz Pflaumer, Franz Wonisch
  • Patent number: 7509766
    Abstract: This invention refers to a compact monitoring system for firearms, including a detecting and tracking structure and a method for confirming ammunition has been discharged from said weapon, more specifically, to a weapon usage detecting and tracking device and a method that utilizes battery operated microcontroller circuitry, and could be used in combination either with a load depletion process warning system which in turn comprises a method for signalizing the user of the depletion process using luminous indicators, and a time and date event recorder or in combination with both, sharing substantially the same structure. Provisions are made in the time recording structure to securely retrieve use information at a further date in a way that may include secure handshaking and a serial number.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: March 31, 2009
    Inventor: Eduardo Carlos Vasquez
  • Patent number: 7383655
    Abstract: A pistol including a loaded chamber indicator to identify the presence of a cartridge loaded in the firing chamber. The pistol may generally include a barrel, a receiver attached to the barrel thereby defining a barrel-receiver assembly, and a chamber associated with the barrel-receiver assembly. An indicating element is provided which in one embodiment may be pivotally mounted in the barrel-receiver assembly. The indicating element is displaceable in response to contact by the cartridge from a first position which may in one embodiment correspond to an absence of a cartridge loaded in the chamber, to a second position which may in one embodiment correspond to a presence of a cartridge loaded in the chamber. A biasing member, such as a spring, may be provided to bias the indicating element towards the first position.
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: June 10, 2008
    Assignee: Sturm, Ruger & Company, Inc.
    Inventor: James McGarry
  • Patent number: 7305786
    Abstract: A centerfire autoloading pistol including a loaded chamber indicator to identify the presence of a cartridge loaded in the firing chamber. The pistol may generally include a housing having an external surface and defining a chamber to receive a cartridge, a barrel unit disposed at least partially in the housing, and an indicating element having two ends. In one embodiment, the indicating element may be pivotally mounted to the housing proximate to one of the ends. The indicating element is displaceable in response to contact by the cartridge from a first position which may in one embodiment correspond to an absence of a cartridge loaded in the chamber, to a second position which may in one embodiment correspond to a presence of a cartridge loaded in the chamber. A biasing member, such as a spring, may be provided for biasing the indicating element towards the first position.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: December 11, 2007
    Assignee: Sturm, Ruger & Company, Inc.
    Inventor: James McGarry
  • Patent number: 7207252
    Abstract: Determining cook-off time for a weapon is disclosed. A method determines a first barrel temperature next to a first energetic, such as a propellant charge, of ammunition within a gun barrel, and determines a second barrel temperature next to a second energetic, such as an explosive charge, of the ammunition. If the ammunition did not properly fire, the method determines a first cook-off time of the first energetic based on the first temperature next to the first energetic and the first energetic's type, and a second cook-off time of the second energetic based on the second temperature next to the second energetic and the second energetic's type. The first and second times may be determined by using one or more finite-difference heat transfer models. If either or both of the first and second times are less than a threshold, a warning-related action is performed to users of the weapon.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: April 24, 2007
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Charles T. Boyer, Jr., Michael K. Oetjen, Din-chih Hwang, Robert V. Krueger, Raymond D. Cooper
  • Patent number: 7066072
    Abstract: Determining cook-off time for a weapon is disclosed. A method determines a first barrel temperature next to a first energetic, such as a propellant charge, of ammunition within a gun barrel, and determines a second barrel temperature next to a second energetic, such as an explosive charge, of the ammunition. If the ammunition did not properly fire, the method determines a first cook-off time of the first energetic based on the first temperature next to the first energetic and the first energetic's type, and a second cook-off time of the second energetic based on the second temperature next to the second energetic and the second energetic's type. The first and second times may be determined by using one or more finite-difference heat transfer models. If either or both of the first and second times are less than a threshold, a warning-related action is performed to users of the weapon.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: June 27, 2006
    Inventors: Charles T. Boyer, Jr., Michael K. Oetjen, Din-chih Hwang, Robert V. Krueger, Raymond D. Cooper
  • Patent number: 6857213
    Abstract: A loading indicator for use in a firearm having a barrel including a rear section and a cartridge chamber is disclosed. In one example, the loading indicator includes an elastic shaft disposed within a compartment in the rear section of the barrel and a feeler portion coupled to the elastic shaft, wherein the elastic shaft is loaded to cause the feeler portion to project into the cartridge chamber and wherein the loading of the elastic shaft allows the feeler portion to be displaced when a cartridge is placed into the cartridge chamber. The example implementation further includes an indicator element adjacent the feeler portion and coupled to the elastic shaft, wherein the indicator element projects from the cartridge chamber when the feeler portion is displaced by a cartridge.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: February 22, 2005
    Assignee: Heckler & Koch GmbH
    Inventor: Norbert Fluhr
  • Patent number: 6802147
    Abstract: A device for firearms (1) and a firearm (1) having this device are disclosed. The device is used for detecting a state in the space (10) and for transmitting a signal correlated to the state. The device has a sensor region (24.1, 24.2) for detecting the state and a conductor arrangement (24.3), connected to the sensor region (24.1, 24.2) for transmitting the signal. The sensor region (24.1, 24.2) and the conductor arrangement (24.3) are formed by a fiber-optic system (24). The device also has a movable indicator (17), whose position corresponds to the state to be detected in the space (10) to be monitored and is detectable by the sensor region (24.1, 24.2). The sensor region (24.1, 24.2) of the fiber-optic system is protected by a shield (20).
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: October 12, 2004
    Assignee: Oerlikon Contraves AG
    Inventors: Hans Viktor Haefeli, Peter Kressibucher
  • Patent number: 6785994
    Abstract: The invention is a firearm safety indicator that is spring-loaded, thus enabling self-ejection when a firearm's bolt is actuated. To attain this, the indicator comprises a main body and cantilever spring body joined together. A peg extends perpendicularly from the main body. In use, the peg is positioned inside the firing chamber of a firearm through the ejection port. The main body covers the ejection port and the cantilever spring body is therefore compressed to attain proper positioning. The rifle's bolt is then used to engage and hold the peg in place. When actuated, the bolt releases the peg and the spring body is released, thrusting the indicator away from the firearm. Alternately, a metal spring may be utilized in the place of the cantilever spring body.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: September 7, 2004
    Inventor: Ned F. Christiansen
  • Publication number: 20040107620
    Abstract: A device for firearms (1) and a firearm (1) having this device are disclosed. The device is used for detecting a state in the space (10) and for transmitting a signal correlated to the state. The device has a sensor region (24.1, 24.2) for detecting the state and a conductor arrangement (24.3), connected to the sensor region (24.1, 24.2) for transmitting the signal. The sensor region (24.1, 24.2) and the conductor arrangement (24.3) are formed by a fiber-optic system (24). The device also has a movable indicator (17), whose position corresponds to the state to be detected in the space (10) to be monitored and is detectable by the sensor region (24.1, 24.2). The sensor region (24.1, 24.2) of the fiber-optic system is protected by a shield (20).
    Type: Application
    Filed: June 3, 2003
    Publication date: June 10, 2004
    Applicant: Oerlikon Contraves AG
    Inventors: Hans Viktor Haefeli, Peter Kressibucher
  • Publication number: 20030230020
    Abstract: The invention is a firearm safety indicator that is spring-loaded, thus enabling self-ejection when a firearm's bolt is actuated. To attain this, the indicator comprises a main body and cantilever spring body joined together. A peg extends perpendicularly from the main body. In use, the peg is positioned inside the firing chamber of a firearm through the ejection port. The main body covers the ejection port and the cantilever spring body is therefore compressed to attain proper positioning. The rifle's bolt is then used to engage and hold the peg in place. When actuated, the bolt releases the peg and the spring body is released, thrusting the indicator away from the firearm. Alternately, a metal spring may be utilized in the place of the cantilever spring body.
    Type: Application
    Filed: June 17, 2003
    Publication date: December 18, 2003
    Inventor: Ned F. Christiansen
  • Patent number: 6622411
    Abstract: A semi-automatic breech locking pistol has a reciprocally movable slide which includes an integral bolt and defines an upwardly and laterally outwardly open ejection port forward of the bolt. A barrel at least partially disposed within the slide has a chamber and a rearwardly extending headspace extension hood and provides a closure for the ejection port in locked breech condition. A chamber status indicator formed by a rearwardly open notch in the headspace extension hood facilitates determination of chamber status by direct visual observation and may also include a forwardly open groove in the bolt which cooperates with the notch in locked breech condition.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: September 23, 2003
    Assignee: Smith & Wesson Corp.
    Inventors: Paul Liebenberg, James M. Quill
  • Publication number: 20020194761
    Abstract: A semi-automatic breech locking pistol has a reciprocally movable slide which includes an integral bolt and defines an upwardly and laterally outwardly open ejection port forward of the bolt. A barrel at least partially disposed within the slide has a chamber and a rearwardly extending headspace extension hood and provides a closure for the ejection port in locked breech condition. A chamber status indicator formed by a rearwardly open notch in the headspace extension hood facilitates determination of chamber status by direct visual observation and may also include a forwardly open groove in the bolt which cooperates with the notch in locked breech condition.
    Type: Application
    Filed: August 29, 2002
    Publication date: December 26, 2002
    Inventors: Paul Liebenberg, James M. Quill
  • Patent number: 6493977
    Abstract: A semi-automatic breech locking pistol has a reciprocally movable slide which includes an integral bolt and defines an upwardly and laterally outwardly open ejection port forward of the bolt. A barrel at least partially disposed within the slide has a chamber and a rearwardly extending headspace extension hood and provides a closure for the ejection port in locked breech condition. A chamber status indicator formed by a rearwardly open notch in the headspace extension hood facilitates determination of chamber status by direct visual observation and may also include a forwardly open groove in the bolt which cooperates with the notch in locked breech condition.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: December 17, 2002
    Assignee: Smith & Wesson Corp.
    Inventors: Paul Liebenberg, James M. Quill
  • Patent number: 6256915
    Abstract: In-chamber cartridge indicator for pistols comprises an indicator (1) lodged in a respective groove (3) of extractor (1) and pivoted by pin (4) so that, when the respective ribs (12, 11) touch the cartridge breech (16) within the chamber, the synchronized movement thereof is prevented and the indicator (7) projects beyond the bolt (2), thereby to provide a visual and tactile indication of the weapon's loaded condition.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: July 10, 2001
    Assignee: Forjas Taurus S/A
    Inventor: Nilton da Silveira
  • Patent number: RE37968
    Abstract: An improved detonator assembly for a black powder firearm having a breech block, a receiver, and a nipple. The detonator assembly comprises a primer and a primer carrier. The primer carrier has an axial bore dimensioned to receive the primer at one end and slip over the firearm nipple at the opposite end. The primer carrier has a lip that abuts the breech block rear end. A tab laterally extends from the lip to provide a handle for installing and removing the assembly and a visual indication that the firearm is primed.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: January 28, 2003
    Assignee: The Marlin Firearms Company
    Inventors: William E. Osborne, Harold J. Waterman, Jr., David Findlay