Miscellaneous Patents (Class 346/146)
  • Patent number: 11833816
    Abstract: A printing apparatus according to an embodiment of this present invention includes a printhead with an orifice for discharging ink, and a recovery unit configured to perform recovery of the printhead by driving a print element of the printhead to discharge ink from the orifice. The apparatus makes a setting for a request for discharge recovery by the recovery unit after initialization processing performed upon power-on of the printing apparatus, and controls the recovery unit to execute one of first discharge recovery and second discharge recovery in which an ink discharge amount is smaller than in the first discharge recovery in accordance with the setting before a start of printing by the printhead.
    Type: Grant
    Filed: April 25, 2022
    Date of Patent: December 5, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoko Yaita, Kei Kosaka
  • Patent number: 10248080
    Abstract: An image forming apparatus includes an image forming section configured to form a toner image, a transfer portion configured to transfer the toner image onto a recording medium, and a fixing portion configured to fix the toner image on the recording medium, by heating the toner image. A vortex tube is configured to receive supply of compressed air generated by a compressor to generate cold air having a temperature that is less than a temperature of the compressed air, and warm air having a temperature that is greater than the temperature of the compressed air. A cooling portion is configured to receive a supply of the cold air generated by the vortex to cool the recording medium on which the toner image has been fixed by the fixing portion. Further, a member inside of the image forming apparatus is heated by the warm air generated by the vortex tube.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: April 2, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahiko Fujii
  • Patent number: 9884349
    Abstract: Proposed is a product range for cleaning breathing apparatuses, including at least two holders, wherein the holders include: a first holder for cleaning breathing masks and breathing valves, including at least one mask holding device for positioning at least one breathing mask, additionally comprising at least one breathing valve holding device for positioning at least one breathing valve and least one pressurizing device with at least one pressure connection, wherein the pressure connection is connectable to the breathing valve and wherein the pressurizing device is set up to apply compressed air to the breathing valve during cleaning; and at least one second holder for cleaning carrying frameworks for pressurized gas cylinders for breather apparatuses, including at least one carrying framework holding device for positioning at least one carrying framework.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: February 6, 2018
    Assignee: MEIKO MASCHINENBAU GMBH & CO. KG
    Inventors: Herbert Falk, Heiko Wörner
  • Publication number: 20110254885
    Abstract: According to this method, there is recorded on the same recording medium (1): a) an encoded recording (A) of the data allowing them to be read automatically, b) a recording (B), intended for intuitive visual reading, of the knowledge necessary for using means for decoding (MD) the data in order to read them automatically.
    Type: Application
    Filed: November 10, 2008
    Publication date: October 20, 2011
    Inventors: Thierry Prigent, Eric Prigent, Karine Van Heumen
  • Patent number: 6247598
    Abstract: A storage container for sealingly carrying an ink jet recording head cartridge having an ink jet recording head having the discharge orifices for discharging the ink and a mounting portion for mounting an ink tank replaceably. The ink jet recording head cartridge comprises a storage tank, mounted on the mounting portion, having a negative pressure producing member accommodating chamber having a negative pressure producing member for producing the negative pressure, with an atmosphere communicating portion for communicating to the outside, and a sealed chamber having a communicating portion for communicating to the negative pressure producing member accommodating chamber and forming a sealed space from the outside, except for the communicating portion, with a sealing member for sealing the discharge orifices.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: June 19, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ken Hosaka, Fumiharu Nakamura, Taiji Yoshinari, Wataru Takahashi
  • Patent number: 6070828
    Abstract: A curl removing device utilizable for the facsimile machine (1), in which the cutout portion (31) is formed on the holding part (28) of the curl removing plate (14) and it is formed in the plate holding part (13) the resilient hook member (24) which positions the curl removing plate (14) against the flat plate part (20) by being resiliently hooked to the cutout portion (31), and when the curl removing plate (14) is installed to the plate holding part (13), the curl removing plate (14) is slid on the flat plate part (20) so that the support shafts (22) of the support sections (21) are inserted in the support holes (30) of the support parts (29) in one direction (the direction shown by the arrow C) and the resilient hook member (24) is hooked to the cutout portion (31).
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: June 6, 2000
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Kazuhito Ishida
  • Patent number: 5881966
    Abstract: Curl removing device utilizable for the facsimile machine (1), in which the cutout portion (31) is formed on the holding part (28) of the curl removing plate (14) and it is formed in the plate holding part (13) the resilient hook member (24) which positions the curl removing plate (14) against the flat plate part (20) by being resiliently hooked to the cutout portion (31), and when the curl removing plate (14) is installed to the plate holding part (13), the curl removing plate (14) is slid on the flat plate part (20) so that the support shafts (22) of the support sections (21) are inserted in the support holes (30) of the support parts (29) in one direction (the direction shown by the arrow C) and the resilient hook member (24) is hooked to the cutout portion (31).
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: March 16, 1999
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Kazuhito Ishida
  • Patent number: 5731974
    Abstract: A method and apparatus for preparing and setting up mobile working equipment using an interactive control console and specialized programming is provided. The interactive control console provides the user with a decision tree having a plurality of decision groups. The decision groups are sequentially presented to the user for a particular application of the mobile working equipment. The system in transportable and can be programmed for any mobile working construction equipment. The interactive control console and method associated therewith provides enhanced User interface, and assures proper configuration within safety regulations and standards.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: March 24, 1998
    Assignee: Pietzsch Automatisierungstechnik GmbH
    Inventors: Heinz Werner Pietzsch, Hans Bronk
  • Patent number: 5373936
    Abstract: A storage container for housing and storing an ink jet cartridge which has a recording head to discharge ink, and an ink tank to contain ink to be supplied to the recording head and which is structured to be exchangeable with respect to a recording apparatus comprises a capping member to be in contact with the ink discharge port surface of the recording head to cover the surface thereof and absorbing members conductively connected to the capping member to absorb ink which leaks from the recording head. With the capping member and absorbing member, an airtightness higher than that of the discharge ports is obtained in order to suppress the ink evaporation from the discharge ports of the recording head while the cartridge which is still in use is kept in the storage container.
    Type: Grant
    Filed: March 3, 1993
    Date of Patent: December 20, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Kawai, Akira Miyakawa, Hideki Yamaguchi, Hitoshi Nakamura, Hisashi Morioka
  • Patent number: 5341689
    Abstract: A pen force gage for a pen plotter for determining whether the force of a pen positioned by a pen support onto the surface of a drawing media in the pen plotter falls within an acceptable range. The pen force gage includes structure for aligning or positioning the gage within the pen plotter so as to enable the gage to measure the force of the pen; a pivotable arm configured at one end to interact with the pen support as the pen moves toward the surface of the media and at the other end to support a movable weight to determine the force to be applied by the pen on the surface of the media; and an indicator and a reference mark for determining whether the force falls within the acceptable range.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: August 30, 1994
    Assignee: CalComp Inc.
    Inventor: Richard Freudenberger
  • Patent number: 5329295
    Abstract: A color ink-jet printer having a heating blower system for evaporating ink carriers from the print medium after ink-jet printing. A preheat drive roller engages the medium and draws it to a print zone. The drive roller is heated and preheats the medium before it reaches the print zone. At the print zone, a print heater heats the underside of the medium via radiant and convective heat transfer through an opening pattern formed in a print zone heater screen. The amount of heat energy is variable, depending on the type of the print medium. A crossflow fan at the exit side of the print zone direct an airflow at the print zone in order to cause turbulence at the medium surface being printed and further accelerate evaporation of the ink carriers from the medium. An exhaust fan and duct system exhausts air and ink carrier vapor away from the print zone and out of the printer housing.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: July 12, 1994
    Assignee: Hewlett-Packard Company
    Inventors: Todd R. Medin, Brent W. Richtsmeier
  • Patent number: 5309181
    Abstract: A pressing clip for pressing a flexible member against a circuit board is provided which comprises a web portion, a presser portion extending from the web portion, the presser portion being elastically deformable for pressing engagement with the flexible member on a side thereof away from the circuit board, and an anchoring portion also extending from the web portion on a side of the circuit board away from the flexible member. The web portion is formed with an access opening through which the flexible member extends.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: May 3, 1994
    Assignee: Rohm Co., Ltd.
    Inventors: Shgeo Ota, Yasushi Ema
  • Patent number: 5293183
    Abstract: The present invention relates to heat blowing equipment for a thermal print head of a color video printer, in which a radiating plate is mounted on the upper surface of the thermal print head and a ventilation fan is directly connected to the upper portion of the radiating plate, thereby being moved together with the head during the up and down operation of the head. Accordingly, a proper temperature is continuously maintained regardless of any position change of the head. The ventilation fan is mounted on a fan guide, which is coupled to the radiating plate by a plurality of levers, so that the structure always effectively cools the thermal print head regardless of any position change of the head.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: March 8, 1994
    Assignee: Goldstar Co., Ltd.
    Inventor: Jai S. Kim
  • Patent number: 5255009
    Abstract: Apparatus for protecting optical elements of an optical ink drop detector that detects the presence of an ink drop in a drop detection zone, and for maintaining an aperture plate used in conjunction with the ink drop detector. The apparatus includes a movable plate having an apertured region and a non-apertured region. The plate is movable relative to the optical elements of the drop detector and is configured to have the aperture region adjacent a drop detection zone of the optical ink drop detector when in a first position and to have the non-apertured region adjacent the detection zone when in a second position. Cleaning brushes are provided for cleaning ink from the aperture region of the movable plate when the plate is moved between the first and second positions, and an enclosure is provided for enclosing the aperture region of the plate when said plate is in the second position.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: October 19, 1993
    Assignee: Hewlett-Packard Company
    Inventors: Stephen W. Bauer, Mark W. Majette, Michael T. Dangelo
  • Patent number: 5231416
    Abstract: A container for an ink jet head having a discharge opening therein includes an openable containing member for containing the ink jet head and permitting removal of the ink jet head when opened, and a discharge recovery member for discharging ink from the discharge opening of the ink jet head in response to removing the ink jet head from the container, in response to opening the openable containing member, or in response to pressing against a wall of the container member.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: July 27, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Terasawa, Takashi Nojima, Hideki Yamaguchi
  • Patent number: 5231425
    Abstract: There is disclosed a storage container for an ink jet recording head, consisting of a part having a box-shaped recess for housing the recording head, and another plate-shaped part for covering the aperture of the recessed part. The recessed part and/or the plate-shaped part has volume resistivity not exceeding 10.sup.10 .OMEGA..cm at least in a portion in contact with the ink jet recording head, and is transparent totally or in part, and both members have nitrogen permeability not exceeding 0.5 cc.mm/cm.sup.2 sec.cmHg.10.sup.10. The container serves to prevent solidification of ink and electrostatic destruction during storage of the recording head.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: July 27, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuaki Masuda, Nobuyuki Kuwabara
  • Patent number: 5182583
    Abstract: An ink jet recording apparatus to which a power source is supplied from a battery and which executes the recording onto a recording sheet by using a recording head which discharges an ink from a discharge port comprises: a battery detector to detect run-down in battery capacity of the battery on the basis of a voltage of the battery; a capping device to cover the discharge port of the recording head; a load control circuit to apply a load to the battery for a predetermined period of time just before the capping device releases the covering of the discharge port of the recording head; a detection control circuit for allowing the battery detector to detect the voltage for the predetermined period of time; and a motor to relatively move the recording head and the recording sheet. The load control circuit applies the load to the battery by supplying the power source from the battery to the motor for the predetermined period of time.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: January 26, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideo Horigome, Junichi Arakawa
  • Patent number: 5142309
    Abstract: A system is disclosed for recording the location on a golf club where the club head impacts a golf ball. A recording medium is attachable to the club head prior to swinging the golf club and is removable from the club head after one or more impacts against the golf ball. One surface of the recording medium is coated with a releasable adhesive substance to permit temporary attachment of the recording medium to the club head. A protective coating is disposed on the other surface of the recording medium for protecting the recording medium and for preventing direct contact between the recording medium and the golf ball. A backing material covers the releasable adhesive substance prior to utilization of the recording medium on the club head to prevent the recording medium from adhearing to unintended objects.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: August 25, 1992
    Assignee: Consumer Advantage Marketing Group, Inc.
    Inventor: James S. Lee
  • Patent number: 5053792
    Abstract: A device for cooling a thermal head of a thermal image recording apparatus comprising a ventilation unit for producing a stream of air for cooling the thermal head and a duct for guiding the stream of air having cooled the thermal head outside the recording apparatus. The air heated by having cooled the thermal head does not circulate within the recording apparatus, whereby the temperature within the recording apparatus can be prevented from rising.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: October 1, 1991
    Assignee: Mitsubishi Denki K.K.
    Inventor: Ryuzo Une
  • Patent number: 5034758
    Abstract: A dust shield for preventing paper dust from fouling a printer and printhead mechanism is disclosed. In a sprocket-wheel paper drive printer, the sprockets are at least partially encased as they enter and exit the holes in the paper. Paper particles are trapped and then channelled away from mechanisms, such as a thermal ink jet cartridge printhead, whose operation may be detrimentally affected by such dust.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: July 23, 1991
    Assignee: Hewlett-Packard Company
    Inventors: Anthony W. Ebersole, Robert W. Beauchamp, Chuong C. Ta
  • Patent number: 4916469
    Abstract: The image-forming apparatus comprises a first frame, a recording electrode with an image formation voltage applied thereto, a belt-like recording medium disposed facing the charging electrode and toner transporting means for supplying toner to a space between said recording electrode and recording medium. For the positioning of the belt-like recording medium with respect to the charging electrode, a second frame for movably supporting the recording medium is provided together with the recording electrode in the first frame. An recording medium feed member is urged against the second frame at a predetermined position thereof. Thus, the recording electrode and recording medium can be positioned relative to each other without need of any particular adjustment whenever the recording medium is replaced.
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: April 10, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuhiro Imai, Tadashi Ochiai, Fumio Asano
  • Patent number: 4876655
    Abstract: The distribution with respect to time of an event defined by the waveform of a repetitive input signal having a magnitude that lies within a predetermined range of values is observed by generating a sample signal at least once during each repetition of the input signal, generating an n-bit digital timing signal representative of the time of occurrence of a sample signal relative to the time of occurrence of the trigger signal, and sampling the repetitive input signal and generating a memory enable signal in the event that the magnitude of the input signal at the time of sampling falls within the predetermined range of values. The memory locations of a memory having 2.sup.n separately addressable memory locations are allocated respectively to the 2.sup.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: October 24, 1989
    Assignee: Tektronix, Inc.
    Inventors: Dale E. Carlton, Clifford E. Baker, Ronald M. Henricksen
  • Patent number: 4823150
    Abstract: A method of and apparatus for printing on corresponding edges of a plurality of flexible sheets maintained in assembled relationship are disclosed. The method includes the steps of printing on the edges of non-contact fashion, controlling the printing with a font programmable to represent indicia to be printed on the edges, dividing the edges into a grid defined by a network of evenly distributed horizontal and vertical spaces, selecting a position on the edges for printing the indicia, indentifying the spaces on the grid for receive portions of the indicia to be printed thereon, determining the portions of the indicia to be printed in each of the spaces in the grid so identified, and programming the font to cause the printing means to print the portions of the indicia so determined in the spaces of the grid so identified after the position for printing of the indicia has been selected.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: April 18, 1989
    Assignee: R. R. Donnelley & Sons Company
    Inventors: Hermann J. Kage, Don E. Detterman, Wade A. Eden, Alex B. Chapman
  • Patent number: 4806948
    Abstract: Apparatus for separating a thermal transfer ribbon from a recording medium includes an elongated member which is positioned adjacent the ribbon and is movable to a position in contact with the ribbon for stripping the ribbon from the recording medium after a printing operation. The elongated member may take the shape and form of a blade or the member may be a wire for stripping the ribbon from the medium.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: February 21, 1989
    Assignee: NCR Corporation
    Inventors: Richard G. Bangs, Michael O. Grey, Sik-Piu Kwan
  • Patent number: 4750006
    Abstract: A platen for a recording device includes a main body of the platen having a flat surface part opposing a recording head and a guiding part for a recording sheet. The guide part is continuous with the flat surface part and inclined so as to secure smooth advancement of the recording sheet. A continuous smooth layer of a material having a frictional coefficient smaller than that of the platen main body is integrally formed on the upper surface of the flat surface part and guiding part.
    Type: Grant
    Filed: May 28, 1987
    Date of Patent: June 7, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenichiro Hashimoto
  • Patent number: 4600927
    Abstract: A method of preserving an ink jet recording head comprises an ejecting element for flying ink droplets, an elastic ink tank portion containing an ink to be fed to the ejecting element, a casing housing the ink tank portion, and the feature is composed of housing the ink jet recording head in a preserving container, elevating the gas pressure in the preserving container to a pressure higher than atmospheric pressure, and keeping the pressurized state. An ink jet recording head is housed in the preserving container and the pressure in the container is higher than atmospheric pressure.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: July 15, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroshi Sugitani
  • Patent number: 4479136
    Abstract: Apparatus for cleaning contaminants from the face and orifice(s) of the print head of an ink jet printer includes a cleaning card having a foam strip secured across the front face of the card near its bottom edge, the upper portion of the card forming step-like protrusions from each lateral or side edge of the narrower lower portion of the card, the foam strip being saturated with a cleaning solvent, the lower portion of the card being adapted for insertion between a card guide and the face of said print head, causing squeezing of the foam strip for release of the solvent upon and wiping of the face of the print head and orifice(s) as the foam strip is moved thereagainst.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: October 23, 1984
    Assignee: Exxon Research & Engineering Co.
    Inventors: Arthur M. Lewis, Aldo Scudo
  • Patent number: 4371878
    Abstract: In an electrostatic type ink-jet printer of the type leaving "guard drops" between charged drops, an electronic circuit is provided which generates charge-enabling signals in response to which guard drops are charged. When a sync signal is generated which synchronizes the rotation of a rotary drum with a print signal, one of the charge-enabling signals which is timed to charge an ink drop causes this ink drop to be charged. As compared with the prior art, ink dot misplacement due to the out-of-synchronization which in turn is due to the variations in rotation of the rotary drum can be more finely corrected. In addition, ink dot misplacement can be more precisely corrected by controlling the charge on an ink drop by pulses which have divided periods of that of the sync signals and which are synchronized with the sync signals.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: February 1, 1983
    Assignee: Ricoh Co., Ltd.
    Inventor: Koichiro Jinnai
  • Patent number: 4370665
    Abstract: A paper transport simulates movement of a plurality of documents past the print station of a ink jet printer. The transport includes an arrangement for transporting a continuous paper web past the print station and a tachometer drive roller for contacting the tachometer wheel of the printer system. The transport further includes a document simulator wheel aligned with the photo-optical document detector of the printer system such that the movement of a succession of documents past the print station may be simulated while the printer system prints upon the continuous paper web.
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: January 25, 1983
    Assignee: The Mead Corporation
    Inventors: Robert J. Scranton, James R. Meckstroth
  • Patent number: 4361845
    Abstract: In an ink jet printing system wherein a drop generator emits ink droplets for printing on a recording media, deleterious ink mist or ink dust formed as a result of ink droplets impacting on the media is collected by a collecting container disposed relative to the zone whereat ink droplets contact the media. A vacuum system is coupled to the container and extracts ink mist which is returned to the ink supply system for reuse. Airborne contamination, to components such as the drop generator, charge electrodes and deflection electrodes, are prevented by encasing the components in a pressurized box.
    Type: Grant
    Filed: March 16, 1981
    Date of Patent: November 30, 1982
    Assignee: International Business Machines Corporation
    Inventor: Gordon J. Smith
  • Patent number: 4343010
    Abstract: In an improved control circuit for the heating current of a system for developing latent photographic images on a heat developable medium, an incipient loss of tension in the record medium is sensed by detecting high frequency components of the energizing current incident to incipient arcing at the heating electrodes. The resulting signal is utilized to interrupt the flow of current to the heating electrodes, to prevent further arcing and the danger of fire. A time delay feature is incorporated to restore the heating current after a predetermined delay. If the tension in the record medium has not been restored, then the incipient arcing will again cause an interruption of the heating current.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: August 3, 1982
    Assignee: Honeywell Inc.
    Inventors: Richard W. Denny, Paul A. Diddens
  • Patent number: 4198154
    Abstract: This specification discloses a recording apparatus which is capable of representing half-tones of an image. The apparatus is provided with a device for varying the spot size of a recording beam on a recording medium in accordance with the density information of the image to be recorded in order that the half-tones of the image may be represented by the use of a screen dot system. This device causes aberration to the optical system used therein, to thereby vary the size of the beam spot impinging on the recording medium and if required adjust the quantity of light of the beam to create spots of different diameters. Thus, without relatively increasing the power of the beam, it is possible to provide beam spots of various diameters to thereby enable representation of a half-toned image.
    Type: Grant
    Filed: July 6, 1978
    Date of Patent: April 15, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Masegi, Takashi Kitamura
  • Patent number: 4126869
    Abstract: A facsimile recorder of moist electrolytic recording paper includes a tray under the helical scanning electrode which traverses the paper. The tray performs the dual function of collecting chaff abraded from the paper by the scanning electrode and of containing a supply of moisture for the paper.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: November 21, 1978
    Assignee: Alden Research Foundation
    Inventor: Frederick W. Simpkins
  • Patent number: 3964072
    Abstract: A waveguide opening for moving paper in and/or out of a data printer employing wave attenuators and reflectors to suppress electromagnetic wave radiation generated within said printer from escaping through the paper opening.
    Type: Grant
    Filed: February 25, 1975
    Date of Patent: June 15, 1976
    Assignee: General Electric Company
    Inventor: Emery A. White
  • Patent number: H276
    Abstract: A method and apparatus for detecting the instant on explosive is detonated by way of an optical signal. A length of optical fiber has one end wrapped around or positioned near the explosive with the other end coupled to a remote recorder. The end of the fiber at the explosive has been cleaved so as to internally reflect an optical signal propagating therein. A beam of radiation is launched into the fiber at the record where it is reflected from the distal end and redirected back to the recorder where it is detected. Detonation of the explosive destroys the reflective end of the optical fiber causing the radiation to leak from the broken fiber end. The instant the recorder does not receive the reflected radiation is the instant of the explosive detonated.
    Type: Grant
    Filed: June 25, 1986
    Date of Patent: May 5, 1987
    Inventor: Lee E. Siems