Patents by Inventor Matthew J. Wooliscroft

Matthew J. Wooliscroft 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).

  • Apparatus for detecting ferromagnetic objects and a protected doorway assembly
    Patent number: 9514624
    Abstract: Apparatus for detecting a ferromagnetic object to protect, for example, a doorway to an MRI room comprises a passive primary sensor apparatus comprising at least one first magnetic sensor, a secondary non-magnetic sensor apparatus comprising at least two sensors, a detection zone for one of the secondary sensors being distinct from the zone of the other one of the secondary sensors, a signal processing circuit arranged in communication with the primary and secondary sensor apparatus, and a warning device. The signal processing circuit identifies temporal variations in the signal from the primary sensor and correlate them with instances in which both sensors of the secondary, non-magnetic, sensor apparatus detect the presence of an object in their respective zones.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: December 6, 2016
    Assignee: Metrasens Limited
    Inventor: Matthew J. Wooliscroft
  • Apparatus for Detecting Ferromagnetic Objects and a Protected Doorway Assembly
    Publication number: 20130285810
    Abstract: Apparatus for detecting a ferromagnetic object to protect, for example, a doorway to an MRI room comprises a passive primary sensor apparatus comprising at least one first magnetic sensor, a secondary non-magnetic sensor apparatus comprising at least two sensors, a detection zone for one of the secondary sensors being distinct from the zone of the other one of the secondary sensors, a signal processing circuit arranged in communication with the primary and secondary sensor apparatus, and a warning device. The signal processing circuit identifies temporal variations in the signal from the primary sensor and correlate them with instances in which both sensors of the secondary, non-magnetic, sensor apparatus detect the presence of an object in their respective zones.
    Type: Application
    Filed: August 16, 2011
    Publication date: October 31, 2013
    Applicant: METRASENS LIMITED
    Inventor: Matthew J. Wooliscroft