Patents Assigned to Compagnie Industrielle Radioelectrique
  • Patent number: 4594514
    Abstract: A method is provided for observing, preferably through the medium of an optoelectronic pick-up, the carrier to be checked which is illuminated by a light beam having an angle of incidence of at least 45.degree. through a rotary disc comprising alternately transparent and opaque sectors spaced from one another by a distance at least substantially equal to the distance measured between the lines of the copperplated printing formed on the carrier. The carrier image is formed in the plane of a detector by means of an optical system. If the carrier has a copperplate printing formed thereon, a moire effect is observed. If the pick-up extends over several transparent sectors of the disc this moire effect is converted electrically into a very pronounced periodic variation of the current delivered by the pick-up, at the sector passage frequency.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: June 10, 1986
    Assignee: Compagnie Industrielle Radioelectrique
    Inventors: Thomas Sidler, Daniel Gasser
  • Patent number: 4473799
    Abstract: Apparatus for detecting the presence of a metal strand in paper, for example in a document or bank note of which one wishes to check the authenticity, comprises means for moving the paper in front of a detection head comprising a coil a resonance circuit supplied by a high frequency source, the frequency of which is close to the resonance frequency of the circuit. The high frequency voltage is modulated by variation of the current in the resonance circuit when the strand passes the detection head. After filtering and amplification, the demodulated signal is applied to a trigger circuit to obtain a digital signal. Delivery of the digital signal to an output terminal is checked by means of a reading window, the opening of which is controlled by the means for moving the paper. The output of the detection head is also applied to a second trigger for checking maintenance of a continuous component in the signal from the resonance to verify continuity of the coil circuit.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: September 25, 1984
    Assignee: Compagnie Industrielle Radioelectrique
    Inventor: Nicolas Favre
  • Patent number: 4402016
    Abstract: The apparatus comprises a laser providing a beam of modulated intensity which sweeps a photo-sensitive sheet driven by a stepping motor. An analog signal received by the apparatus is demodulated and sampled, the samples representing elementary points. These samples are transformed into digital signals and memorized in two memories connected in tandem. A line of points is recorded once and reproduced 2.n times, an image point being constituted by the repetition of 2 times 21/2 elementary points. The signals memorized are retransformed into analog signals for the modulation of the laser. An enlargement may be obtained by the repetition of each elementary point and of each line.
    Type: Grant
    Filed: April 21, 1981
    Date of Patent: August 30, 1983
    Assignee: Compagnie Industrielle Radioelectrique
    Inventor: Christian Muller
  • Patent number: 4367045
    Abstract: A method and apparatus for checking the width and parallelism of margins following the centering of a print with respect to a support. The support is moved in front of two opto-electronic reading devices with the margins to be checked arranged transversely with respect to the direction of movement of the support. The reading devices are used to produce two counting periods for each margin, the widths of the periods corresponding to the widths of the margin at two points thereof. Clock pulses are produced depending on the movement of the support by means of an opto-electronic detector. Clock pulses appearing in the counting periods are counted and the resultant count compared with maximum and minimum reference values to check the width of the margins. Clock pulses appearing in one of the counting periods are counted only when the counting periods do not coincide with regard to time and the number of pulses counted is compared with a reference value representing the tolerance limit of non-parallelism.
    Type: Grant
    Filed: January 14, 1981
    Date of Patent: January 4, 1983
    Assignee: Compagnie Industrielle Radioelectrique
    Inventor: Claude-Arnold Grosvernier
  • Patent number: 4339044
    Abstract: The installation comprises several inspecting devices disposed along a track and controlling a switch. Each inspecting device is followed by a device for detecting the passage of the sheets, associated with a cyclic counter assigning a consecutive number to each sheet. A logic circuit directs the information from the inspection devices to reference memories the number of which is equal to the number of possible content conditions of the counters, (i.e. consecutive numbers) the information being directed to the reference memory whereof the number corresponds to the consecutive number of the sheet as assigned by the counters. Since the sheets are assigned numbers during their passage through the inspection region, it is possible to have several sheets simultaneously in this region.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: July 13, 1982
    Assignee: Compagnie Industrielle Radioelectrique
    Inventor: Claude Grosvernier
  • Patent number: 4298807
    Abstract: Documents are caused to pass in front of a light source incorporating optical fibres and the reflected light is collected by means of photoelectric elements. The collected reflected light is compared with a reference value. A row of photoelectric elements is used which successively transmits, by multiplexing, the signals delivered simultaneously by a row of the photoelectric elements. The analog signals are converted into digital signals, and a totalling and averaging of the digital signals is carried out in order to determine the state of general dirtiness of the document. The number of photoelectric elements of the row covered by the document is counted to inspect the width of the document and detect the presence of dog ears. In addition the number of photoelectric elements delivering a signal which exceeds a certain level is counted.
    Type: Grant
    Filed: November 27, 1979
    Date of Patent: November 3, 1981
    Assignee: Compagnie Industrielle Radioelectrique
    Inventor: Nicolas Favre
  • Patent number: 4277176
    Abstract: A method and apparatus for checking the width and parallelism of margins following the centering of a print with respect to a support, wherein the support is moved in front of opto-electronic reading devices such that the margins extend parallel to the direction of movement. A number n of photosensitive member are distributed in a linear manner transversely with respect to the direction of movement of the support, the number of sensitized photosensitive members of the reading devices producing a signal greater than a threshold level is counted for each margin, the number of members counted is compared with a reference value, and the difference between the numbers of members counted at two different points of each margin is compared with a reference value. The first comparison provides a measure of the width of the margin, and the second comparison provides a measure of the parallelism of the margins.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: July 7, 1981
    Assignee: Compagnie Industrielle Radioelectrique
    Inventor: Claude-Arnold Grosvernier
  • Patent number: 4275299
    Abstract: Method for the detection, on a sheet of paper, of an area which becomes fluorescent when it is exposed to ultraviolet radiation, in which the paper sheet passing in front of a detector is illuminated by means of a source of ultraviolet light modulated by a frequency of between 1 and 10 KHz. The modulated fluorescent radiation is detected, amplified and demodulated by means of an amplification circuit and a demodulation circuit providing a first signal. The intensity of the ultraviolet source is measured by a photo-electric member associated with a detection and demodulation circuit supplying a second signal. This second signal is used to regulate the level of operation of at least one trigger which operates to provide an output, corresponding to the fluorescent radiation, when the level of the first signal supplied to the trigger is at at least the trigger operating level.
    Type: Grant
    Filed: April 17, 1979
    Date of Patent: June 23, 1981
    Assignee: Compagnie Industrielle Radioelectrique
    Inventor: Nicolas Favre
  • Patent number: 4061436
    Abstract: A banknote invalidating machine comprises an interchangeable plate for receiving a pile of banknotes of given format, a press which compresses the pile of notes, and a perforating tool which is moved by a sequential control to perforate the compressed pile of notes at given locations.
    Type: Grant
    Filed: October 1, 1976
    Date of Patent: December 6, 1977
    Assignee: Compagnie Industrielle Radioelectrique
    Inventor: Franz Durrer