Patents by Inventor Roy S. Jefferies

Roy S. Jefferies 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).

  • Lock and method of securing and releasing a member
    Patent number: 4916927
    Abstract: Relative movement of members (10,11) of a lock is normally obstructed by an element (14) which can be moved by a solenoid (18) entirely into a recess in one of the members so that the one (11) and the obstructing element (14) can turn together relative to the other member (10) and solenoid. The arrangement may be used to prevent turning of a key-receiving member relative to a housing or as a clutch between two members mounted rotatably in a housing.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: April 17, 1990
    Inventors: John O'Connell, Roy S. Jefferies, Hugh Trevor-Jones
  • Security device and method
    Patent number: 4854146
    Abstract: Relative movement of members (10,11) of a lock is normally obstructed by an element (14) which can be moved by a solenoid (18) entirely into a recess in one of the members so that the one (11) and the obstructing element (14) can turn together relative to the other member (10) and solenoid. The arrangement may be used to prevent turning of a key-receiving member relative to a housing or as a clutch between two members mounted rotatably in a housing.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: August 8, 1989
    Assignee: Lowe and Fletcher Limited
    Inventors: John O'Connell, Roy S. Jefferies, Hugh Trevor-Jones
  • Information carrier and reader
    Patent number: 4810861
    Abstract: An information carrier (17) has formations (20,21) which are engaged by contact elements (30,32) during insertion of the carrier into a receiving member (39) the movement of the contact elements is amplified and transmitted by levers (26,33) to respective means (25,34) for providing electrical signals representing movement of the contact elements.
    Type: Grant
    Filed: June 25, 1987
    Date of Patent: March 7, 1989
    Assignee: Lowe & Fletcher Limited
    Inventors: Victor L. Herriott, Roy S. Jefferies
  • Method of operating a security device, security device and data carriers for use in the method
    Patent number: 4791280
    Abstract: A lock has means (15,16) for reading from a key (11) a binary encoded number. If the number read from the key is a predetermined number, the lock will store in a memory (19) a further number read from a further key applied immediately after withdrawal of the first key. The device will then recognize the second key, when applied subsequently.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: December 13, 1988
    Assignee: Lowe and Fletcher Limited
    Inventors: John O'Connell, Alan Webster, Roy S. Jefferies, Hugh Trevor-Jones