Monitoring Patents (Class 219/121.23)
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Patent number: 10088613Abstract: An imaging system for sensing light in an area of high optical contrast is disclosed. In some implementations, the imaging system is for monitoring a welding operation, whereby a photochromic filter is used to reduce the intensity of the light observed from the welding arc. The imaging system includes a light source whereby light from the light source activates the photochromic filter. Thus, the opacity of the photochromic filter depends on the intensity of the light from the light source.Type: GrantFiled: April 5, 2016Date of Patent: October 2, 2018Assignee: Weld Camera, LLCInventor: Gary J. Thompson
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Patent number: 8809780Abstract: A process (and apparatus for performing the process) for layer manufacturing a three-dimensional work piece comprising the steps of: feeding raw material in a solid state to a first predetermined location; exposing the raw material to an electron beam to liquefy the raw material; depositing the raw material onto a substrate as a molten pool deposit, the deposit having a forward edge region in an x-y plane with a forward edge region width and a trailing edge region in the x-y plane with a trailing edge region width, under at least one first processing condition; monitoring the molten pool deposit for at least one preselected condition using detecting of scatter from a scanning electron beam contemporaneously with the depositing step; solidifying the molten pool deposit; automatically altering the first processing condition to a different processing condition based upon information obtained from the comparing step; and repeating steps at one or more second locations for building up layer by layer, generally aloType: GrantFiled: November 13, 2013Date of Patent: August 19, 2014Assignee: Sciaky, Inc.Inventors: Phillip E. Wollenhaupt, Scott Stecker
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Patent number: 8598523Abstract: A process (and apparatus for performing the process) for layer manufacturing a three-dimensional work piece comprising the steps of: feeding raw material in a solid state to a first predetermined location; exposing the raw material to an electron beam to liquefy the raw material; depositing the raw material onto a substrate as a molten pool deposit, the deposit having a forward edge region in an x-y plane with a forward edge region width and a trailing edge region in the x-y plane with a trailing edge region width, under at least one first processing condition; monitoring the molten pool deposit for at least one preselected condition using detecting of scatter from a scanning electron beam contemporaneously with the depositing step; solidifying the molten pool deposit; automatically altering the first processing condition to a different processing condition based upon information obtained from the comparing step; and repeating steps at one or more second locations for building up layer by layer, generally aloType: GrantFiled: October 12, 2010Date of Patent: December 3, 2013Assignee: Sciaky, Inc.Inventors: Scott Stecker, Phillip E. Wollenhaupt
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Patent number: 8546717Abstract: A process and apparatus for free form fabrication of a three-dimensional work piece comprising (a) feeding raw material in a solid state to a first predetermined location; (b) depositing the raw material onto a substrate as a molten pool deposit under a first processing condition; (c) monitoring the molten pool deposit for a preselected condition; (d) comparing information about the preselected condition of the monitored molten pool deposit with a predetermined desired value for the preselected condition of the monitored molten pool deposit; (e) solidifying the molten pool deposit; (f) automatically altering the first processing condition to a different processing condition based upon information obtained from the comparing step (d); and repeating steps (a) through (f) at one or more second locations for building up layer by layer a three-dimensional work piece.Type: GrantFiled: September 16, 2010Date of Patent: October 1, 2013Assignee: Sciaky, Inc.Inventor: Scott Stecker
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Publication number: 20100243618Abstract: A temperature control method for a heating apparatus including a chamber which can be evacuated and has a conductive portion, a filament which is positioned in the chamber, a first power supply which supplies a current to the filament, a second power supply which applies, to the filament, a voltage for acceleration to the chamber, an ammeter which measures a current of the filament, and a voltmeter which measures the acceleration voltage, the method comprises a first step of evacuating an interior of the chamber; a second step of supplying the filament current from the first power supply to the filament after the first step; a third step of applying the acceleration voltage to the filament after the second step; and a fourth step of controlling the acceleration voltage to keep a surface temperature of the chamber to be lower than a temperature of the filament after the third step while keeping constant the filament current from the first power supply.Type: ApplicationFiled: March 18, 2010Publication date: September 30, 2010Applicant: CANON ANELVA CORPORATIONInventors: Masami Shibagaki, Kaori Mashimo, Hiroshi Doi
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Patent number: 6649859Abstract: In a partial-vacuum-type, electron-beam irradiation system having a construction such that a static-pressure floating pad is connected to a vacuum chamber incorporating an electron-beam column, and an electron-beam passes through an electron-beam passage of the static-pressure floating pad to impinge on a body to be irradiated in the condition where the static-pressure floating pad is contactlessly attracted to the body to be irradiated, a vacuum-seal valve for opening and closing the electron-beam passage is provided inside the static-pressure floating pad, and when the static-pressure floating pad is separated away from the body to be irradiated, the vacuum-seal valve is actuated to close the electron-beam passage, whereby the atmospheric air is prevented from flowing into the vacuum chamber.Type: GrantFiled: February 27, 2002Date of Patent: November 18, 2003Assignee: Sony CorporationInventors: Yoshihisa Miura, Yuichi Aki