Patents by Inventor Eloisa L. Perez

Eloisa L. Perez 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).

  • Patent number: 5530349
    Abstract: The sensor device uses the flux-gate principle and detects and cancels a second harmonic frequency (2f.sub.o) output by a sensor coil (23). The sensor device includes a master oscillator (1) that provides a stable output that is supplied to a generator (2) which generate two signals which respectively have a basic operating frequency (f.sub.o) and a double basic operating frequency (2f.sub.o or 2fc). The basic operating frequency (f.sub.o) is amplified in a power booster (3) and is connected to drive coil (22) mounted on a core (39) in the sensor head (4) to saturate the core (39). The output signal from the sensor coil (23) of sensor head (4) is filtered in a first bandpass filter (5) to obtain the second harmonic of the sensor coil, the output signal of the first bandpass filter (5) is detected in a phase detector (6) that is also connected to receive the double (2fc) frequency. The phase detector output is connected to a second low filter (7).
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: June 25, 1996
    Assignee: Alcatel Standard Electrica, S.A.
    Inventors: Braulio T. Lopez, Miguel H. Carbonero, Francisco S. Hernandez, Claudio A. Hernandez-Ros, Carmen S. Trujillo, Eloisa L. Perez, Pedro S. Sanchez
  • Patent number: 5428888
    Abstract: A manufacturing process for use in manufacturing magnetic field sensor head cores, comprises: providing a core formed of an amorphous ferromagnetic material on which is placed an insulating layer; mounting, a first winding that functions as a drive coil for the core over said insulating layer; providing second (37) and third (38) coils on said core (31) that respectively function as a sensor and a compensating coil for the sensor head; both the second and third coils being wound in form of a hollow cylinder 36 inside of which is positioned an assembly formed by the core 31 and the drive coil 32; supplying a first electric current to the core 31 of the sensor head, said core heating up as said first current flows through said drive winding, supplying a second and alternating electric current to that the one 38 of compensating and sensor coils 37 and 38 that surrounds the core 31 and functions as the compensating winding 38; monitoring a signal induced in the other coil 37 that functions as the sensor winding a
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: July 4, 1995
    Assignee: Alcatel Standard Electrica, S.A.
    Inventors: Claudio A. Hernandez-Ros, Ma Carmen S. Trujilio, Eloisa L. Perez, Pedro S. Sanchez