Patents by Inventor Walter Haworth

Walter Haworth has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Autolevelling method and apparatus
    Patent number: 5388310
    Abstract: An autoleveller derives the signal for its draft correction from an averaged value of the sliver weight or thickness signals in each of a plurality of unit lengths of the sliver path. A preferred embodiment uses upstream and downstream sliver weight or thickness measuring means to derive signals for a draft correction and the gain of a draft correction made in response to the first sliver measuring means is varied in response to the averaged signal from the second sliver measuring means.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: February 14, 1995
    Assignee: John D. Hollingsworth on Wheels, Inc.
    Inventor: Walter Haworth
  • Coiler and autoleveller
    Patent number: 5339495
    Abstract: This invention relates to a coiler using tongue and groove rollers preferably for measuring sliver thickness and guiding sliver emerging from between these rollers, using guide means such as a pair of calender rollers driven for rotation in the same conveying direction.Optionally the sliver between the conveying nip at the tongue and groove rollers and the guide means (when embodied as calender rollers) is severed by intermittent operation of the conveying and guiding nips.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: August 23, 1994
    Assignee: Hollingsworth (U.K.) Ltd.
    Inventors: Walter Haworth, John Whiteley, Alfred Wood, Stephen W. Yates
  • Drafting apparatus with autolevelling
    Patent number: 5018248
    Abstract: A drafting system and autoleveller are arranged such that the "tongue" roller and the "grooved" roller of the sliver sensor ahead of the first drafting rollers serve to measure the thickness of the sliver therebetween, and their output signal is used, subject to a time delay, to vary the draft ratio in the subsequent drafting means. The autoleveller throughput speed is adjustable and the time delay in the draft ratio variation is automatically adjusted in response to the speed selected.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: May 28, 1991
    Assignee: Hollingsworth (U.K.) Limited
    Inventors: Walter Haworth, Alfred Wood