Patents Assigned to Zellweger Uster Limited
  • Patent number: 4303849
    Abstract: A process and apparatus for charging a capacitor, particularly for flash guns with a fast flash series, so as to achieve a short charging time while avoiding a high charging current pulse, the charging current during the course of the charging being regulated to a value which at least approaches a constant. The time constant of the charging circuit is altered during the charging process by a controlled resistance arrangement which is controlled in dependence upon the charging voltage of the capacitor.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: December 1, 1981
    Assignee: Zellweger Uster Limited
    Inventors: Simon Goede, Kurt Fischer
  • Patent number: 4232447
    Abstract: In the continuous measurement and control of deviations in cross-section of slivers with constant relative sensitivity which is independent of the adjusted set value with respect to this set value, the sliver is guided between a grooved roller and a feeler roller which contact each other in the absence of the sliver between the grooved roller and the feeler roller. The changes in the position of the feeler roller are converted into rotational movements of a lever shaft and thus into changes of direction of a measuring tab. The measuring tab is arranged eccentrically on the lever shaft.A sensor is movable by means of a lead spindle which is perpendicular to the lever shaft and lies in a plane determined by the lever shaft and by the axis of the feeler roller in the absence of sliver between the rollers. This sensor preferably has a magneto-resistor.
    Type: Grant
    Filed: January 19, 1979
    Date of Patent: November 11, 1980
    Assignee: Zellweger Uster Limited
    Inventors: Werner Grunder, Erwin Murbach
  • Patent number: 4126793
    Abstract: A circuit arrangement for a remote control receiver, especially a ripple control receiver, which receives remote control signals from a power mains, comprising means for reducing the ambiguity of the response characteristic of the remote control receiver caused by at least one non-linear circuit element connected with the input of a selective receiver section of the remote control receiver.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: November 21, 1978
    Assignee: Zellweger Uster Limited
    Inventor: Hans de Vries