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| Number | Title | Issue Date |
| 7204137 | Thread breakage detection systems and methods A thread breakage detection apparatus comprises a light source operable to generate a light beam, an emitter in communication with the light source, the emitter operable to emit the light beam, and a receiver in communication with and disposed in facing opposition t... | 04/17/2007 |
| 6979815 | Folding apparatus of a web-fed printing press including a conveyor belt monitoring device A folding apparatus (30) having at least one conveyor belt (10) which is used to convey signatures (64) at least on a section of a path (66, 68) of the signatures (64) through the folding apparatus (30). The folding apparatu... | 12/27/2005 |
| 6608321 | Differential wavelength inspection system An inspection tool or inspection system can be utilized to determine whether the appropriate pattern is on a reticle. The reticle can be associated with EUV lithographic tools. The system utilizes at least two wavelengths of light. The light is directed t... | 08/19/2003 |
| 6342706 | Retroreflective detector A retroreflective detector comprises a detection unit which houses two transmitting elements and two receiving elements, in which a transmitting element and a receiving element form a pair and two such pairs are disposed in a matrix arrangement. Every row... | 01/29/2002 |
| 6236327 | Wafer-fetching sensing device for wafer storage apparatus A wafer-fetching sensing device for wafer storage apparatus uses a planar detection means to replace a conventional linear detection means to detect if a wafer is properly positioned at a desirable access level before being moved out of an access opening ... | 05/22/2001 |
| 6177287 | Simplified inter database communication system A method of reviewing classification data and image data for defects detected in a series of semiconductor manufacturing processes. An inspection wafer is selected from a production lot of wafers and is inspected after the completion of each of the series... | 01/23/2001 |
| 5838017 | Control device for monitoring the passage of two superimposed paper webs in a paper processing machine A control device (3) for monitoring the travel of two superimposed paper webs (1, 2) in a paper processing machine has a thin stationary plate (4) arranged at the edge of the paper webs (1, 2) that extends between both paper webs in the direction of trave... | 11/17/1998 |
| 5828448 | Method and apparatus for distinguishing between defects in an optical fiber coating The present invention provides an optical detection system for detecting defects in an optical fiber. The system includes a light source for coupling light into the secondary coating of an optical fiber at a preselected angle with respect to the longitudi... | 10/27/1998 |
| 5786891 | Method and apparatus for detecting defects in an optical fiber coating The present invention provides an optical detection system for detecting defects in an optical fiber. The system includes a light source for coupling light into the secondary coating of an optical fiber at a preselected angle with respect to the longitudi... | 07/28/1998 |
| 5712489 | Web flutter detection A system for detecting web flutter of a web leaving a nip utilizes a proximity of sensor preferably a plurality of proximity sensors arranged transversely of the web to locally measure the distance between the web and the sensors at a distance no greater ... | 01/27/1998 |
| 5466945 | Apparatus for detecting proper positioning of objects in a holder The positions of objects in a holder, such as a cassette containing semiconductor wafers, are determined by a system that projects a pair of coplanar light beams through the cassette from one side. A reflector on the opposite side reflects both light beam... | 11/14/1995 |
| 5389789 | Portable edge crack detector for detecting size and shape of a crack and a portable edge detector A detector for detecting edge cracks in the web in a papermaking machine includes a plurality of light sources for directing light at the web and a plurality of light sensors for receiving the light through the cracks for generating a plurality of signals... | 02/14/1995 |
| 5331175 | Strand breakage detection system for use with a plurality of strands being fed in unison along a rotating circular array of feed paths A system for sensing breakage of one or more of a plurality of strands of material that are being fed in unison along a circular array of separate feed paths while the array of feed paths is being rotated about an imaginary axis that extends substantially... | 07/19/1994 |
| 5329961 | Reed with optical weft detector A loom having an optical weft detector which includes a light emitter and a light detector for picking up light reflected by a weft thread in a guide duct formed by blades of the reed, is mounted on the side of the reed which faces away from the guide duc... | 07/19/1994 |
| 5319578 | Yarn profile analyzer and method A yarn profile analyzer and method in which the yarn is moved under substantially constant tension through an imaging area including a light source and a spaced light sensing array. The width of closely spaced portions of the yarn passing through the imag... | 06/07/1994 |
| 5316562 | Optical fiber tension monitoring technique As an optical fiber (12) is being drawn, air (14) is directed at a portion of the fiber as a succession of air pulses, the pulses having a frequency near the natural frequency of the fiber portion. The frequency of the air pulses is then varied over a ran... | 05/31/1994 |
| 5285235 | Photographic copying apparatus and operating process In a photographic copying apparatus for processing exposed photographic film there are recorded in a measuring station, in addition to measurement data relating to the color composition of the negative, also splice events and perforation events and their ... | 02/08/1994 |
| 5247184 | Photoelectric bobbin sensor with retroreflective filament presence detection Photoelectric sensing apparatus is operative for sensing the absence of filament at a particular point on a supply bobbin wherein several strands of filament will still be present on the bobbin. The sensing apparatus includes a light source which directs ... | 09/21/1993 |
| 5206709 | Apparatus for sensing yarn movement and for signaling breakage of the yarn Yarn is guided along a linear path through a light beam which is directed toward a photoelectric detector. Non-uniformities in the surface texture of the yarn cause the intensity of the light received by the detector to fluctuate rapidly as long as the ya... | 04/27/1993 |
| 5160850 | Light beam interrupt detection apparatus for use in a vibrating environment A light beam interrupt detection apparatus for use in a vibrating environment comprises a light source for producing a beam of light, a light receiver for receiving and detecting the beam, the receiver having a detector surface sufficiently larger than th... | 11/03/1992 |
| 5130557 | Photoelectric web tension detector for signaling web break In a web break detecting device for web processing machines, more particularly web fed rotary printing presses, comprising at least one sensing means adapted for cooperation with the web and preferable in the form of a single path photoelectric detector w... | 07/14/1992 |
| 5017797 | Device for detecting yarn A device for detecting a doubled yarn includes a detecting device having photoelectric sensors disposed in a plane perpendicular to a running path of a yarn provided in a housing such that beams of light projected from light projecting elements may reach ... | 05/21/1991 |
| 4984896 | Method and apparatus for optically monitoring a knitted article For optical monitoring of a knitted article for faults during the manufacture thereof in a knitwear processing machine, the knitted article is scanned line by line by the optical scanner. The scan signals generated in the process are delivered to a digita... | 01/15/1991 |
| 4922090 | Device for checking conditions of a strip of wrapping material to a user machine The device for checking the feed conditions of a strip of wrapping material comprises a photodiode and a phototransistor arranged on opposite sides of the strip. A circuit block including a negative feedback is connected between the phototransistor and th... | 05/01/1990 |
| 4772800 | Method of detecting a broken yarn in a row of line up yarns and apparatus therefor A method and apparatus for detecting a broken line up yarn, wherein a fine beam is adapted to travel widthwise across a row of line up yarns while it is radiated toward the yarns to cause flickerings which are photoelectrically converted to instantly coun... | 09/20/1988 |
| 4754722 | Thread break detector for a sewing machine A thread break detector for a thread in a sewing machine comprising, a sensor device having a signal path cross section for scanning, a first thread guide disposed on one side of the sensor device, and a second thread guide disposed on the other side of t... | 07/05/1988 |
| 4743749 | Self compensating circuit for measuring rapidly occurring optoelectronically detectable events A circuit is described which can be used to record rapidly occurring faults in a slowly reacting circuit which is self compensating so that the photoelectric light emitters used in the circuit have their flux maintained constant.... | 05/10/1988 |
| 4738284 | Method and an apparatus for detecting the weft yarn in a jet loom A light reflection type weft detection apparatus for use in a jet loom is disclosed, in which the weft yarn is caused to travel by a jet fluid within a weft guide passage provided along a reed mounted on a slay, and which detection apparatus includes a li... | 04/19/1988 |
| 4691647 | Optical thread breakage monitoring apparatus An optical thread breakage monitoring apparatus for tufting machines has a laser beam scanning apparatus (21). The retroreflecting strip (11) illuminated by this laser beam scanning apparatus (21) is secured above the eyes (12) of the needles (13) to the ... | 09/08/1987 |
| 4625666 | Optical thread breakage monitoring apparatus for tufting machines An optical thread breakage monitoring apparatus for tufting machines contains a laser (36), a mirror wheel (17) which is illuminated by the laser and also a plurality of spaced apart strip-like deflecting mirrors (23, 11, 12) which direct the laser light ... | 12/02/1986 |
| 4608496 | Strand break detector Strand break detector for monitoring a number of straightened strands extending along a number of predetermined paths, with regard to a broken or missing strand. An optical transmitter with light-receiving means is arranged to supply, at relative motion b... | 08/26/1986 |
| 4549413 | Device for the photoelectric supervision of a warp loom A device for the photoelectric supervision of a warp loom for irregularities in the yarn supply of a yarn sheet has an infrared radiation source and receiver, which are arranged so that the infrared beam is alternately interrupted and released, in time wi... | 10/29/1985 |
| 4546263 | Weft sensor for a loom A weft sensor for a loom which can detect the presence or absence of a weft inserted into a warp shed at an acceptable moderate sensitivity on the basis of the majority decision of weft detection signals. When sensor sensitivity is too high, the weft sens... | 10/08/1985 |
| 4541722 | Contour line scanner An edging system for sawing cants into boards includes a contour line scanner for profiling the cant and determining the combination of board widths of a specified grade which will yield the greatest economic return based on current prices. A pair of fan-... | 09/17/1985 |
| 4500792 | Apparatus for controlling the titer of synthetic fiber tows An apparatus controls the titer of synthetic fiber tows by an optical measurement of the cross section of the tow. A ray beam which illuminates the tow from one side is directed towards a photodiode row, on which the tow throws its shadow. The number of p... | 02/19/1985 |
| 4410803 | Thread-monitoring device for textile machines A thread-monitoring device for monitoring threads being fed to a textile machine, comprising for each pair of threads to be monitored, a two-arm lever pivotally mounted in a pendulum-like manner and provided at the free ends of its arms with respective th... | 10/18/1983 |
| 4389574 | Method and apparatus for detecting a break in a plurality of glass fibers A method and apparatus for detecting breakage of glass fibers comprising illuminating the fibers with electromagnetic radiation and sensing a variation in the amount of radiation scattered by the fibers as an indication of a break of said fibers.... | 06/21/1983 |
| 4365654 | Thread monitoring apparatus for textile machines A weft or filling thread monitor comprises a wire-shaped feeler pin which is pivoted by a thread, against the action of spring force, in the region of a measuring field. The measuring field encompasses a light-emitting diode and a photocell and enables ge... | 12/28/1982 |
| 4341958 | Yarn-break/yarn-stop detecting device In a photoelectric yarn-break/yarn-stop detecting device in which a light emitter element and a photoelectric transducer element are positioned in such a manner that the yarn to travel through the detecting device passes through the beam of light emitted ... | 07/27/1982 |
| 4335316 | Web break detector with adjustable scanning head A system for detecting breaks in a web moving through a predetermined area including a scanner head assembly having an infrared emitter, optical filtering and an adjustable receiver for detecting the presence or absence of reflecting infrared radiation fr... | 06/15/1982 |
