Patents by Inventor Pierluigi Melis

Pierluigi Melis 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).

  • Method and apparatus for monitoring the operating condition of lamps in a public lighting network
    Patent number: 5471201
    Abstract: An apparatus for monitoring the state of operation of lamp (2) in a public lighting network is provided comprising a sensing unit (6) associated with each lamp (2) for measuring the voltage of and luminous flux emitted by each lamp (2). Each sensing unit (6) also calculates the efficiency of lamp using an efficiency index given by the gradient of the line which, in a Cartesian diagram in which the voltage of the lamp is the x-coordinate and the flux the y-coordinate, represents the instantaneous relationship between the parameters.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: November 28, 1995
    Assignee: Schlumberger Industries S.r.l.
    Inventors: Pietro Cerami, Pierluigi Gatti, Pierluigi Melis