Manuel F Fernandez

60320990, Feb 29, 2000

Nov 2, 1996

8/747008

Manuel Fernandez - Studio City CA

G06F16500

701220

Processes and algorithms to determine and correct key error sources in an inertial navigator. These key error sources are azimuth misalignment error and all gyro drift rate errors ("North", "East" and "Down"). Thus the invention provides improved directional accuracy and improved navigation performance. The processes and algorithms can be implemented within the system computer to determine and correct for the system error sources thus determined automatically.

44538499, Jun 12, 1984

Jun 18, 1982

6/389906

Manuel J. Fernandez - Canoga Park CA

B43K 2300
B43K 802
B43K 302
B43L 1302

401193

A protective shield for a felt tip pen is provided for spacing the ink-laden felt nib of the pen from a ruling edge to prevent ink from contacting or bleeding under the ruling edge. The protective shield includes a relatively thin plate substantially overlying one side of the felt nib and including a relatively short wing projecting at least slightly beyond one longitudinal margin of the overlaid side. In use, the plate engages the ruling edge with its outboard face to space the felt nib therefrom when the felt nib is moved over a writing surface in a direction generally parallel with the plate. Alternatively, when the felt nib is moved over a writing surface in a direction generally perpendicular to the plate, the free marginal edge of the wing engages the ruling edge to maintain the nib in spaced relation therewith. In some embodiments, the protective shield is adapted for relatively easy installation and/or removal with respect to the felt nib, whereas in another embodiment the shield is applied directly to the nib as a coating.

59419350, Aug 24, 1999

Sep 23, 1996

8/717858

Manuel Fernandez - Studio City CA

G06F16500

701220

A process and algorithms to determine and correct for azimuth-axis drift rate in an inertial navigator. The process and algorithms may be implemented as an automatic sequence within the system computer to determine and correct the system errors thus determined. These actions provide the system with improved directional accuracy and improved navigation performance.

57896712, Aug 4, 1998

Aug 15, 1996

8/698395

Manuel Fernandez - Studio City CA

G01C 2100
G01C 1938

73180

A process and algorithms to determine and correct for the error in azimuth alignment and the errors in "North" and "East" Gyro Drift Rates in an inertial navigator which has been aligned via gyrocompassing, or via the "Stored Heading" technique, with the system "at rest". The process and algorithms may be implemented as an automatic sequence within the system computer to determine and correct the system errors thus determined. These actions make the inertial navigator more accurately represented by the model of an ideal navigation system with a pure and singular initial azimuth misalignment error. Thus the inertial navigator's inital azimuth misalignment error can be more accurately determined and corrected by the model.