With Eye Shield Patents (Class 219/147)
  • Patent number: 11324632
    Abstract: The present invention discloses a helmet with an inwards flipping type goggle, which includes a helmet body, a goggle, a front protection lens and a link mechanism; the front protection lens is fixed to the front side of the helmet body, the goggle is fixed to the link mechanism, the link mechanism is capable of adjusting the goggle to move up and down and to be rotatably connected to the two sides of the helmet body, and the goggle are located in the helmet body.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: May 10, 2022
    Inventor: Haijian Sun
  • Patent number: 11317986
    Abstract: An apparatus includes a splash shield incorporating a clear viewing area, a vacuum manifold, the vacuum manifold adapted to releasably engage the splash shield, a light assembly removeably linked to a lower surface of the vacuum manifold, and a port emanating from the vacuum manifold, the port configured to attach to a vacuum system wherein application of a vacuum creates a laminar flow to draw vapor away from the splash shield.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: May 3, 2022
    Inventor: David J. Ahearn
  • Patent number: 11051917
    Abstract: The invention relates to a dental prosthesis comprising a prosthesis base and teeth which are attached in or to the prosthesis base (14), wherein the prosthesis base (14) comprises a ventilation element, in particular a ventilation valve (12).
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: July 6, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Robert Wolfgang Krybus, Andreas Häfele Clemens, Konrad Hagenbuch, Roger Frei
  • Patent number: 10520357
    Abstract: In an embodiment, an arc light sensor includes: a first polarizer, a second polarizer, a magneto-optical material, a first light filter and a processing unit. The first polarizer is used for polarizing incident first target light, to form first polarized light in a first polarization direction. The second polarizer is used for polarizing incident second target light, to form second polarized light in the first polarization direction. The magneto-optical material, in a current magnetic field, uses the current magnetic field to rotate a polarization direction of the first polarized light, to form third polarized light. The first light filter is used for filtering the third polarized light, to form fourth polarized light capable of passing in a second polarization direction. The processing unit is used for determining whether the second target light is arc light according to intensity of the second polarized light and intensity of the fourth polarized light.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: December 31, 2019
    Inventors: Xing Yi, Wei Gang Chen, Yue Zhuo, Ji Zhang
  • Patent number: 9510765
    Abstract: An example includes a neurosensing and feedback device to detect mental states and alert the wearer, such as in real-time. In an example, neural activity is detected by sensors that measure frequency, amplitude, synchrony, sequence and site of brain activity. These measurements can be compared to neural signatures and patterns shown to be correlated to neuropsychological conditions and disorders. When these measurements indicate an undesirable state the wearer is alerted via visual, audible or tactile means designed to be highly effective at alerting the wearer and allowing them to adjust their brain activity. Executive function, known to be crucial for school readiness, academic achievement and successful life outcomes, is the chief state to be detected, trained and supported. The device is designed to be used during primary activities, e.g. reading and listening, and to not require third party intervention during primary use.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: December 6, 2016
    Assignee: Awear Technologies, LLC
    Inventor: Rod Greder
  • Patent number: 8569655
    Abstract: A welding helmet is capable of providing an image representative of information from an associated welding operation where the image appears in the same focal range as the welding work area.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: October 29, 2013
    Assignee: Lincoln Global, Inc.
    Inventor: Stephen R. Cole
  • Patent number: 8119974
    Abstract: An auto darkening eye protection device comprising a shutter assembly and a control circuit in electrical communication with the shutter assembly. The shutter assembly is adjustable between a clear state and a dark state. The control circuit comprises a microcontroller programmed to store a plurality of memory presets including at least one setting corresponding to the operation of the shutter assembly. At least two of the plurality of memory presets are individually configured for a specific type of welding.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: February 21, 2012
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Thomas J. Hamilton, Barry D. Scott
  • Patent number: 7564014
    Abstract: A welding light detection and anti-glare eye protection apparatus, which shields welding light generated in welding or cutting environments to safely protect eyes of a worker from the welding light, and a method for controlling the same are provided. When the apparatus is powered on, it is determined, based on a reference value, whether or not a specific time has passed without detecting welding light. If the specific time has passed without detecting welding light, a power saving mode is performed. If welding light is detected while the power saving mode is performed, normal power is supplied and light transmittance is controlled. When the power saving mode is performed, the reference value is reset so that photosensitivity is reduced below a specific value. This method saves energy while preventing the apparatus from operating abnormally. Thus, it is possible to drive the anti-glare eye protection plate most efficiently according to ambient environments.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: July 21, 2009
    Assignee: Otos Tech Co., Ltd.
    Inventor: Moon Young Huh
  • Patent number: 7534005
    Abstract: Apparatus 10 disclosed an improved welders helmet having a replaceable lens 16 thereon incorporating an electrically driven fan 14 which receives filtered air through a plurality of air ducts 24 having a filter 22 thereon. A receptacle 20 for containing a battery is disposed on the helmet along with photovoltaic elements 32 for recharging the batteries from the flash of the weld. Lights 30 are also disposed on the helmet as well as communication means.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: May 19, 2009
    Inventor: Michael Buckman
  • Patent number: 7178932
    Abstract: Apparatus 10 discloses an improved welders helmet having a replaceable lens 16 thereon incorporating an electrically driven fan 14 which receives filtered air through a plurality of air ducts 24 having a filter 22 thereon. A receptacle 20 for containing a battery is disposed on the helmet along with photovoltaic elements 32 for recharging the batteries from the flash of the weld. Lights 30 are also disposed on the helmet.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: February 20, 2007
    Inventor: Michael Allen Buckman
  • Patent number: 7161135
    Abstract: A multi-stage control for an auto-darkening lens includes a first detector to detect initiation of welding and a second detector to detect continuation of welding after welding has been initiated. The first detector has relatively low sensitivity and fast response time; and the second detector has relatively high sensitivity that can be altered as may be necessary, relatively slow response time to allow opportunity to determine whether welding is continuing as inputs indicative of welding, and adaptive filtering to filter ambient effects and the like from such inputs to avoid false detection of welding.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: January 9, 2007
    Assignee: Lightswitch Safety Systems, Inc.
    Inventor: John D. Fergason
  • Patent number: 7161116
    Abstract: A welding protective mask (1) includes illumination equipment (3) for illuminating a work area. The illumination equipment (3) includes an illumination device (5), a detection device (8) for detecting an ambient light intensity, an energy storage (7) for electrically supplying the illumination equipment (3) and controller (6) for controlling an intensity of light radiated by the illumination means (5) according to the ambient light intensity. In a preferred embodiment of the invention the controller (6) is set up to detect a welding process with a flicker circuit and to switch off the illumination device (5) during the welding process.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: January 9, 2007
    Assignee: Optrel AG
    Inventor: Lukas Steinemann
  • Patent number: 7126085
    Abstract: A self-darkening shield for replaceably attaching to a torch. The self-darkening shield includes a shield and apparatus. The shield replaceably attaches to the torch, is self-darkening, and is a plate that is substantially inverted U-shaped to straddle the torch to provide shielding not only above the torch but also to its sides. The apparatus is operatively connected to the shield and replaceably attaches the shield to the torch.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: October 24, 2006
    Inventor: Hilary Boehme
  • Patent number: 7029136
    Abstract: A light shield for eye protection in the welding process comprises a holding unit, a base plate, a filter plate and a universal joint. The filter plate, in conjunction with the base plate, is mounted on a universal joint by which the tilt angle thereof with respect to the holding unit can be free adjusted. Since the filter plate is applied closely to the welding target, the area thereof is small, significantly reducing the weight of the light shield. The base plate further includes a lamp for illuminating the welding target, so that welding can be conveniently done in dark places. The holding unit is for retaining a hand of a user, leaving the fingers of the hand for handling other parts.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: April 18, 2006
    Inventor: Ming Kun Hsu
  • Patent number: 6734393
    Abstract: The invention describes a welding system with a welding device (1) and a protective device (28), in particular a protective shield (29) for a user or welder. The protective device (28) has an electrically controllable and/or adjustable protective visor (31) with a control system (32). The welding device (1) or the welding system consists of at least one current source (2), a welding torch (10) and a control unit. The protective device (28) has a transmitter and/or receiver unit (33) which is connected to the control system (32).
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: May 11, 2004
    Assignee: Fronius International GmbH
    Inventors: Helmut Friedl, Franz Niedereder, Heinrich Hackl
  • Patent number: 6710298
    Abstract: The invention relates to a device for metal welding, comprising a shielding element (1) which allows visual monitoring of the working process but protects the eyes from light radiation. The device comprises a video camera (5) which is directable towards the welding zone for recording the welding process in the form of video signals transmitted, via an image processing unit, to a video display unit (7), which the user is able to view and which is placed in or on the inside of the shielding element (1). The image processing unit reads process data from the video signals and presents the same via the video display unit.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: March 23, 2004
    Inventor: Ingemar Eriksson
  • Publication number: 20030160038
    Abstract: the invention provides methods of aiding visibility in welding or high temperature cutting operations by interposing light and/or polarising filters between the work area and the operator. The methods do not use workpiece marking to enhance visibility or use only conventional workpiece markers, e.g. chalk, which do not actively emit light by luminescent activity.
    Type: Application
    Filed: October 25, 2002
    Publication date: August 28, 2003
    Inventor: Dennis J. O'Connell
  • Patent number: 6242711
    Abstract: Apparatus for monitoring manual arc welding procedures for providing to the welder real-time monitoring of the welding characteristics to achieve optimum welds. The voltage and current conditions of the welding arc are instantly transferred within the visual range of the helmet wearing operator by the use of lights, illuminated bar graphs, light projections, illuminated see-through displays, or the like, located in proximity to the helmet viewing window wherein, through such monitoring, the operator is constantly aware of the arc conditions during welding.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: June 5, 2001
    Assignee: AccuData, Inc.
    Inventor: Edward L. Cooper
  • Patent number: 6230328
    Abstract: An eye protection device for use in the welding of platinum jewelry items under magnification of a visor containing lens includes a pair of opposing support arms attached to a mounting bracket for attachment to the image magnification visor. A filter frame unit containing a welding filter screen is rotatably coupled to the opposing support arms to permit the filter frame to move between a stored, stowed, and a deployed position. The support arms are configured to hold the filter frame in the stowed position in a manner such that the frame can be moved to the deployed position with a quick movement of a user's head while worn.
    Type: Grant
    Filed: January 3, 2000
    Date of Patent: May 15, 2001
    Inventor: Michael Gary Holloway
  • Patent number: 6172334
    Abstract: Welding device to enable a welder to maintain an upright position when welding at floor level. The device is a rigid handle having a pistol-type handgrip and telescoping tubes. The telescoping tubes can be easily adjusted and interlocked, thus providing a handle that is adjustable to a plurality of lengths. The handgrip is angled approximately 90° to the longitudinal axis of the handle and provides for a comfortable and secure grip. The electrode holder used in the welding process can be releasably attached to the distal end of the device. In the Preferred Embodiment, the telescoping tubes and handgrip are hollow, so that a power cable can be fed through the device and connected to the electrode holder. Mounted on the device is a welding shield made of welder's glass, that shields the welder's eyes from the welding flame and protects the welder from sparks arising from the welding site, thus eliminating the need on the part of the welder to wear a welding hood with mask.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: January 9, 2001
    Inventors: Mark James Harris, Roy Harrison Guidry, Jr.
  • Patent number: 6012163
    Abstract: An eye protection device for use in the welding of platinum jewelry items under magnification of a visor containing a lens includes a pair of opposing support arms attached to a mounting bracket for attachment to the image magnification visor. A filter frame unit containing a welding filter screen is rotatably coupled to the opposing support arms to permit the filter frame to move between a stored, stowed, and a deployed position. The support arms are configured to hold the filter frame in the stowed position in a manner such that the frame can be moved to the deployed position with a quick movement of a user's head while worn.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: January 11, 2000
    Inventor: Michael Gary Holloway
  • Patent number: 6008466
    Abstract: A protective mask which has a face shield and an eye shield is used for safety when a worker machines a workpiece by a laser beam. Start switches are provided in the mask, and closed when a worker wears the mask. A laser torch, a conductive clip and a laser oscillator are connected in series. When a workpiece is brought in contact with the end of a taper nozzle of the laser torch and the conducting clip, an electric current is sent from a power source to the laser oscillator, which is oscillated. Thus, accident by laser beam owing to unexpected electric conduction is prevented.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: December 28, 1999
    Assignee: Nihon Welding Co., Ltd.
    Inventor: Naoyoshi Hosoda
  • Patent number: 5880793
    Abstract: Electro-optical glare protection device is disclosed for use with protective glasses, protective helmets or protective masks with at least one optical detector, especially a photodiode, with an electro-optical glare protection plate incorporating at least one liquid crystal cell, and with an electronic circuit for the adjustment and setting of the optical transmission of this glare protection plate. The protective device comprises a non-optical detector and a switch connected to the electronic circuit for adjusting the optical transmission of the glare protection plate. The switch links the signals produced by these detectors with each other as an and/or circuit. The electronic circuit generates corresponding switch signals.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: March 9, 1999
    Assignee: Xelux AG
    Inventors: Stefan Gunz, Rene Werthmueller, Livio Ghisleni
  • Patent number: 5877825
    Abstract: A method and a safety device for the protection of a user's eye, or other radiation sensitive system, from a pulsed radiation emitted by a radiation source by means of an electro-optical shutter used in conjunction with the radiation source. The electro-optical sutter defines the field of view of the user or of the system and is capable of being switched by an electrical voltage signal from a transparent state to an opaque state within a response time .DELTA.t.sub.r. The method comprises applying to the electro-optical shutter the electrical voltage signal at an operational time interval .DELTA.t.sub.o, prior to the emission of each radiation pulse and keeping the electro-optical shutter in its opaque state until the radiation pulse is emitted. The operational time interval .DELTA.t.sub.o is at least slightly longer than the response time .DELTA.t.sub.r so that, by the time of emission of each radiation pulse, the electro-optical shutter is in its opaque state.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: March 2, 1999
    Assignee: The State of Israel, Atomic Energy Commission Soreq Nuclear Research Center
    Inventor: Zvi Kotler
  • Patent number: 5614117
    Abstract: A welding apparatus and shield are provided for safely and effectively welding metal structures. The shield includes a translucent body having an oblique end surface which, in part, extends beyond the end of a gas nozzle of an arc welding apparatus. The operator may safely view the arc plasma generated between the nozzle and a workpiece through a relatively flat portion of the shield. The shield substantially covers the arc plasma while in use, protecting the operator as well as bystanders.
    Type: Grant
    Filed: October 19, 1995
    Date of Patent: March 25, 1997
    Inventor: Eric M. Krobath
  • Patent number: 5519522
    Abstract: A welding helmet including an optical protective lens including one or more liquid crystal cells as a variable optical transmission device responsive to a prescribed input to vary light transmission and light blocking characteristics thereof, and a hot mirror band pass filter having a relatively wide transmission characteristic in the visible spectrum and filtering characteristics in the infrared spectrum, the variable optical transmission device being tuned to provide a warning to indicate a nonoperating condition; and the variable optical transmission device being operative in a drive to dark mode for fast operation. Also disclosed is a method for protecting the eyes of a welder while providing a bright clear state, a fast switching to dark state, and the providing of an indication of a power off or failure state.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: May 21, 1996
    Inventor: Jeffrey K. Fergason
  • Patent number: 5241154
    Abstract: A shield for a welding torch. The shield can be adjusted to positions above, beneath, and to either side of the tip of the torch.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: August 31, 1993
    Assignee: Mig-it Inc.
    Inventor: Evan A. Estrate
  • Patent number: 5191468
    Abstract: A welder's helmet (1) provided with a fast filter (3) which is controlled by welding light and through which the wearer of the helmet can see clearly in the absence of welding light. In accordance with the invention, the helmet is complemented with side windows (4) operative to filter out IR and UV radiation and having a moderate filter effect for visible light.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: March 2, 1993
    Assignee: Hornell Elektrooptik AB
    Inventor: Kjell Mases
  • Patent number: 5189735
    Abstract: A welding system with an automatically operated helmet closes the helmet's hood, and thus its face mask, before turning on a welding electrode. The system includes an actuator with a piston that mount to the helmet's headband and hood, respectively. Only when the system detects that the mask is closed will power to the electrode be actuated. This system is controlled by a safety circuit, which the welder simply plugs the helmet into for automatic control. If the welder does not plug into the safety circuit, the system operates similar to a conventional welding system.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: March 2, 1993
    Inventor: Peter J. Corona
  • Patent number: 5077448
    Abstract: A shield member for attachment to a conventional insulative line stick as used by power linesmen and other electrical staff working on high voltage distribution lines protects the user of a line stick when closing cut-out assembly doors and engaging in similar activities. The shield member protects against the ejection of fuses or the blowing out or explosion of fuses. The shield member, in the form of a plate, clips onto the line stick, for example, by spring clip members attached to one arm of a bracket, another arm of the bracket being attached to the shield member.
    Type: Grant
    Filed: January 2, 1990
    Date of Patent: December 31, 1991
    Inventor: Philip B. Andrew
  • Patent number: 4945572
    Abstract: A welding mask is disclosed comprising an opaque face shield having a viewing opening therein, a filter lens pivoted to the face shield adjacent the viewing opening, moving means to move the filter lens pivoted to the face shield adjacent the viewing opening, moving means to move the filter lens from a closed to an open position, said moving means including electrical transducer means to cause pivotal movement of said filter lens, restoring means to restore the filter lens to the closed position, and electrical control means for said transducer means, said control means including electrode voltage sensing means to sense the electrode voltage of an arc welder and circuit means responsive to the sensed electrode voltage to provide energy to said transducer means when the voltage rises above a predetermined maximum value and to not provide energy to the transducer when the sensed voltage falls below a predetermined minimum value.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: August 7, 1990
    Inventor: Bernard Rosen
  • Patent number: 4937879
    Abstract: An automatic rotatable welding helmet for TIG and MIG electric arc welding systems having safety means preventing the arc cycle from commencing until the helmet is in the fully down position. An arc welding helmet is provided having a hood with eye shield, connected by pivoting means to an interior head band harness. The hood has an exteriorly mounted base supporting a bi-directional piston and cylinder mechanism which, under actuation by a source of compressed air, pushes against a cam connected at the pivot, resulting in rotation of the helmet from the fully open to the fully closed position, and vice versa. In operation, the welder presses a welding cycle activation switch which effects, through a control box, to deliver compressed air to one end of the cylinder, forcing the piston outward against the cam, thereby rotating the helmet. A safety switch mounted to the base, assures positive protection against the arc cycle being started until the helmet is in the fully down position.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: July 3, 1990
    Inventors: David R. Hall, Mark Steele
  • Patent number: 4890335
    Abstract: A welding shield is designed to have a flow of ventilating air directed across both exterior and interior surfaces of a viewing lens forming a part of the shield. Both integral and separable air supply arrangements are used, and all of the supplied air is filtered before delivery across the shield.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: January 2, 1990
    Inventor: Arnold E. Crowson
  • Patent number: 4875235
    Abstract: A welder's mask with breath-activated eye shield which includes a conventional welder's mask housing with hardware for mounting upon a welder's head. A viewing opening exists in the mask housing which receives a welder's eye shield into an eye shield framework. A power source and motor are mounted to the mask housing. A linkage is attached between the shaft of the motor and the eye shield. The motor operates to turn the shaft in either rotational direction causing the linkage to move the eye shield out of the eye shield framework or into the eye shield framework according to the welder's choice. Operation of the motor is controlled by a breath-activated switch. An air chamber includes an aperture covered by a resilient diaphragm. A tube is connected to a second aperture in the air chamber. The welder exhales to outwardly flex the diaphragm from the chamber and inhales to inwardly flex the diaphragm. A rigid stem is connected between the diaphragm and an electrically conductive element.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: October 24, 1989
    Inventor: Thomas E. Kuhlman
  • Patent number: 4785954
    Abstract: A special welding apparatus comprises welding pliers and a head shield, which may be attached together by means of an engaging groove, a pressure ball, a fixed ring, a fixed hook and a hook seat, or may be separated from each other. The colored goggle assembly has a sliding mechanism; when a key on the handle of the head shield is pressed down, the colored goggle will slide away from the window, and when the key is released, the colored goggle will be moved back over the window.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: November 22, 1988
    Inventor: Edward K. Li
  • Patent number: 4730096
    Abstract: An apparatus for monitoring the welding state or the like of a welding part luminous at a high luminance wherein a light attenuating device is arranged near at least one end surface of an image guide arranged at one end in the focal plane of an image forming objective and transmitting an optical image to the other end side so that even an image having a high luminance part may be monitored without glaring.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: March 8, 1988
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Morihide Mizumoto
  • Patent number: 4728173
    Abstract: An optical filter for welding protective lens assemblies has two parallel electro-optical cells, at least one of the cells being of the nematic type with admixture of dye molecules with anisotropic light absorption. The filter comprises a filter sheet disposed in the ray path of the cells and allowing transmission within a wave range which is offset with respect to the wave range within which said one cell is transmitting residual light in its absorbing state.
    Type: Grant
    Filed: February 22, 1985
    Date of Patent: March 1, 1988
    Inventor: Peter Toth
  • Patent number: 4694141
    Abstract: An improved automatic welder's helmet having two pneumatic cylinders to effect the closing of the helmet's dark eye lens prior to energizing the welding system for striking the welding arc, and further to maintain the dark eye lens closed until after the arc and the weldment's white afterglow have ceased. Additionally, the invention includes a ventilation system manually controlled to ventilate the helmet and to remove welding fumes and smoke from the interior of the helmet and the dark eye lens.
    Type: Grant
    Filed: October 31, 1986
    Date of Patent: September 15, 1987
    Assignee: The Fourth Dimension, Inc.
    Inventor: Lawrence R. Hahn
  • Patent number: 4686711
    Abstract: An eye protection device for the window of a welding hood or shield includes a first stationary screen portion and a second screen portion which is reciprocable toward and away from a position in the window. A drive for the movable screen portion is connected to a control device which has a manually operable switch to initiate movement of the screen toward the window before the commencement of a welding operation. Additionally, an electro-optical sensor is connected to the control device to provide emergency actuation of the drive if the manual switching element is not used. Preferably, the control also includes a timing element connected to the electrooptical sensor which moves the second screen portion away from the window if the welding light is not detected after a certain period of time.
    Type: Grant
    Filed: August 11, 1986
    Date of Patent: August 18, 1987
    Assignee: Impexor AG
    Inventor: Hermann Budmiger
  • Patent number: 4658113
    Abstract: A device and method for protecting optical means from contaminated gases, in which a substantially laminar flow of clean gas is passed over the surface of the optical means to be protected that is exposed to the contaminated gases.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: April 14, 1987
    Assignee: N.V. Optische Industrie "De Oude Delft"
    Inventor: Abraham Vingerling
  • Patent number: 4638146
    Abstract: A method of protecting eyes from welding rays in arc welding and an apparatus therefor are disclosed which are capable of closing a filter plate over a period from right before the generation of arc welding rays to the termination of the generation to fully intercept the rays, to thereby effectively protect the eyes of an operator from the rays. The invention is constructed in a manner such that a controller carries out the on-off control of a voltage applied from a filter power source to a PLZT filter plate depending upon a signal supplied from a detection circuit thereto when the detection circuit detects a built-up current occurring in a welding current, to thereby carry out the actuation of the filter plate.
    Type: Grant
    Filed: October 8, 1985
    Date of Patent: January 20, 1987
    Assignees: Nagase Sangyo Kabushiki Kaisha, Kabushiki Kaisha Sensor Gijutsu Kenkyujo
    Inventor: Ario Koyama
  • Patent number: 4555614
    Abstract: A weld metal cooling rate indication system is provided for a welding mace. The welding machine has a torch which is capable of producing a weld bead and has a speed sensor which senses the speed at which the torch travels as selected by an operator. The indication system includes a device for continuously sensing a profile of temperatures along the weld bead, this profile including a predetermined weld temperature. Another device receives the temperature profile and travel speed of the torch information for calculating and producing a signal which represents rate of change of weld temperature at the predetermined weld temperature. A range of acceptable rates of change of weld temperatures at the predetermined weld temperature is provided so that the rate of change of weld temperature at the predetermined weld temperature can be compared with this range.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: November 26, 1985
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Richard A. Morris, William E. Lukens, Charles A. Zanis
  • Patent number: 4418267
    Abstract: An automatic electrically operated protective system protects a welder from harmful light rays and sputtering emanating from the weld zone. An electric circuit controls a light shield means to assume either an open or closed condition. The electric circuit is responsive to the absolute value of the voltage between a welding electrode and a workpiece. A light shield opening signal is produced when this value is smaller than the electrode open circuit voltage but greater than the maximum electrode welding voltage upon ignition of the arc. A light shield closing signal is produced prior to the ignition of an arc when the aforementioned value is greater than the electrode to workpiece short circuit voltage and slightly smaller than the electrode open circuit voltage.
    Type: Grant
    Filed: May 5, 1981
    Date of Patent: November 29, 1983
    Inventor: Josef Pfanzelt
  • Patent number: 4379962
    Abstract: A shield for a plasma arc torch is carried by a support mounted so as to be easily disassembled, to permit inspection and/or servicing of components surrounded by the shield by merely lifting up on the support to disengage a pair of projections at the opposite ends thereof from a pair of receptacles fixed to the frame of the machine which supports the torch.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: April 12, 1983
    Assignee: Deere & Company
    Inventor: Richard W. Hirst
  • Patent number: 4332004
    Abstract: A lighting system for a welders helmet which includes a high intensity, high Kelvin temperature electric light source attached to the face shield for directing a high energy, high Kelvin temperature light beam forwardly of the viewing port, and an energizing circuit including an on-off switch interconnecting the light source to a source of electrical energy which deenergizes the light source where the welder's eyes are not protected by the face shield.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: May 25, 1982
    Inventor: Grimes G. Slaughter
  • Patent number: 4293757
    Abstract: Improved automatic welder's helmet having pneumatic control to effect closing of the helmet's dark eye shield prior to energizing the electrode for striking the welding arc, and further to maintain the dark eye shield closed until after the arc and weldment's white afterglow have ceased. Additionally, the helmet includes a ventilation system operable to ventilate the helmet and remove annoying welding fumes and smoke from the interior thereof and about the eye shield in its lowered position on the operator's head. In a modified embodiment, the helmet ventilation system operates only when the operator is depressing the electrode holder's control button.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: October 6, 1981
    Inventor: Francis J. Niemi
  • Patent number: 4241286
    Abstract: A protective welding lens assembly for use as the eyepiece of a welding helmet in which the lens assembly can be changed from a light-transmitting condition to an essentially opaque condition of very small light transmission, and vice versa, in response to an electrical signal and wherein the electrical signal for changing the light-transmitting characteristics of the lens assembly is controlled by energy emanating from the mouth of the user of the welding helmet. Preferably, the lens assembly comprises a liquid crystal light shutter; however any lens assembly can be used which can be electrically actuated to change its light-transmitting characteristics. A transducer is disposed within the welding helmet so as to be in front of the mouth of the welder when the helmet is positioned over his face. The transducer can comprise either a microphone responsive to sound from the welder's mouth or a pressure transducer responsive to blowing from the welder's mouth.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: December 23, 1980
    Inventor: Mack Gordon
  • Patent number: 4225771
    Abstract: A method and apparatus for lowering the contrast range between a welding arc and its surroundings for remote viewing of an arc welding process. A monochromatic light source (10) is used to illuminate the area surrounding the welding arc (18) and a narrow band interference filter (22) tuned to the wavelength of the monochromatic light (10), is placed in front of a viewing camera (24). The monochromatic light enhances the arc background while the filter (22) attenuates the arc illumination that reaches the camera for a more desirable contrast ratio so that the arc, weld puddle and surrounding area can be visible with a high degree of definition on the monitor.
    Type: Grant
    Filed: April 25, 1979
    Date of Patent: September 30, 1980
    Assignee: Westinghouse Electric Corp.
    Inventors: James W. H. Justice, Paul G. Kennedy, Robert C. Miller
  • Patent number: 4109132
    Abstract: A system for selectively pivoting a welding mask shutter lens either into an opened or closed position so that between welding operation, the work can be observed directly through the lens window opening with the lens pivoted out of the way; the system including an electro-magnet for pivoting the lens out the window opening, and wiring from the electromagnet extending to a pushbutton on a handle of a welding rod holder so to conveniently operate a switch in an electrical circuit with the electromagnet for attracting an iron bar formed on the frame of the lens.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: August 22, 1978
    Inventor: Aristotel Butoi
  • Patent number: RE29684
    Abstract: A protective welding lens assembly is shown, as for use in the eye piece of a welding helmet, utilizing a liquid crystal together with an electrical circuit which applies a suitable electrical potential to the liquid crystal to change the same from a uniform light transmitting condition to a uniform approximately opaque condition of very small light transmission solely in response to approach to the welding electrode close to the workpiece to be welded.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: June 27, 1978
    Inventor: Mack Gordon