Patents Assigned to Parsons Controls Limited
  • Patent number: 4722434
    Abstract: Attachment of a scraper member--such as a flight bar 14 (FIG. 8) to a scraper conveyor chain 2 moving in pans 12 is effected by means of a land 42 formed on an extension 36 of the flight bar seating in a chain link 44. The driving force of the chain is transmitted to the flight bar through the land and no loading is transmitted to a retaining finger piece 50 bolted to the flight bar using a square headed bolt 34 captive against a shoulder on the flight bar. The retaining finger piece is symmetrical and hence reversible. In another embodiment, a short saddle piece serving as a race cleaner and chain support may also be secured to the chain by means of a land co-acting with the chain and retained on the chain by means of retaining pins.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: February 2, 1988
    Assignee: Parsons Controls Limited
    Inventor: Michael J. Millington
  • Patent number: 4556246
    Abstract: A chain sling assembly (FIG. 13) includes a main link 2 provided with two separable connector links 14 each carrying two shackles 50 and shortening clutches 66. Each connector link 14 has a first portion 16 profiled to co-act with the main link 2 and a second portion 18 profiled to co-act with the shackles 50, hubs 42 of the first portion 16 extending externally of hubs 44 of the second portion 18 and being connected with a pin 20. The shortening clutches permit adjustment of the free length of a fall portion of chain 83 by engaging a link 81 in a jaw portion 76.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: December 3, 1985
    Assignee: Parsons Controls Limited
    Inventor: Michael J. Millington
  • Patent number: 4497169
    Abstract: An elongate main link 2 for a chain or cable sling shaped as a pair of generally semi-circular crown portions 4 connected by parallel-extending side portions 6 has the crown portions 4 formed with inner and outer circumferentially extending flanges 8 and 10 connected by webs 12 and the side portions 6 formed with inner flanges 14 joined to outwardly extending webs 16.
    Type: Grant
    Filed: May 19, 1983
    Date of Patent: February 5, 1985
    Assignee: Parsons Controls Limited
    Inventor: Michael J. Millington
  • Patent number: 4188687
    Abstract: A stopper component for use in a fishing trawl which is made of metal and which includes first and second closed loops each defining an aperture, said closed loops merging to form a central portion from which outwardly projecting shoulders emerge. The outwardly projecting shoulders preventing the stopper component from being passed through a Kelly's Eye.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: February 19, 1980
    Assignee: Parsons Controls Limited
    Inventor: Michael J. Millington
  • Patent number: 3962755
    Abstract: A link component for use in trawling gear which is made of metal and has at one end a closed loop, the other end having two projecting arms which, together with part of the loop, provide a clevis or shackle, the arms of which have apertures to receive a connecting pin for connection to an end link of a chain and wherein the loop is sufficiently wide at its end remote from the shackle to receive a pair of couplers for two wire ropes or chains and wherein at least one of the wide pieces of the closed loop is provided with a recess or flat sufficiently wide to enable a hook of predetermined size to be hooked onto the loop provided the throat of the hook is correctly orientated.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: June 15, 1976
    Assignee: Parsons Controls Limited
    Inventors: Anthony Alan Buschini, Douglas Edward Swarsbrick
  • Patent number: 3962811
    Abstract: A shackle component for use in a fishing trawl in the form of a pair of shackles or clevises arranged in back-to-back relationship with the free ends of the arms of each extending away from each other, each of the arms of each shackle being apertured to receive a connecting pin and at least one of the arms of each shackle having a further aperture therein to receive a locking pin to hold the connecting pin in place.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: June 15, 1976
    Assignee: Parsons Controls Limited
    Inventors: Anthony Alan Buschini, Douglas Edward Swarsbrick
  • Patent number: 3962810
    Abstract: A stopper component for use in trawling equipment which is made of metal and has one end formed to resemble a chain link, an opposite end in the form of a shackle and a central portion intermediate the two ends provided with outwardly projecting shoulders to prevent the stopper component from being passed through a Kelly's Eye.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: June 15, 1976
    Assignee: Parsons Controls Limited
    Inventors: Anthony Alan Buschini, Douglas Edward Swarsbrick
  • Patent number: 3959909
    Abstract: A Kelly's Eye component for a fishing trawl is disclosed, the component being formed of metal and having one end in the form of a ring defining an aperture which is sufficiently large to allow passage of a trawl rope, the other end of the component being in the form of a shackle, the two arms of which are apertured to receive a connecting pin and at least one of the arms having a further aperture therein extending at right angles to the first aperture and arranged tangential thereto to receive a locking pin so that an end link of a chain may be connected to the shackle.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: June 1, 1976
    Assignee: Parsons Controls Limited
    Inventors: Anthony Alan Buschini, Douglas Edward Swarsbrick