Robert JamiesonPinehurst, NC

4382655, May 10, 1983

Apr 7, 1980

6/138164

Robert S. Jamieson - Los Angeles CA

California Institute of Technology - Pasadena CA

G02B 5174

350 9612

Planar optical circuits may be made to cross through each other, (thus eliminating extra steps required to fabricate elevated, nonintersecting crossovers) by control of the dimensions of the crossing light conductors (10, 12) to be significantly greater than d=0. 89. lambda. and the angle of crossing as nearly 90. degree. as conveniently possible. A light trap may be provided just ahead of the intersection to trap any light being reflected in the source conductor at angles greater than about 45. degree. The light trap may take the form of triangular shaped portions (16a, 16b) on each side of the source conductor with the far side of the triangular portion receiving incident light at an angle so that incident light will be reflected to the other side, or it may take the form of windows (18a, 18b) in place of the triangular portions. Planar optical circuit boards (21-23) may be fabricated and stacked to form a keyboard (20) with intersecting conductors (26-29) and "keyholes" (0-9) where conductors merge at the broad side of the circuit boards. These keyholes may be prearranged to form an array or matrix of keyholes.

4213412, Jul 22, 1980

Aug 17, 1977

5/825441

Robert S. Jamieson - Los Angeles CA

B63B 3500

114 61

A plural-hull craft incorporates separate hulls pivotally attached at the extremities of an interconnecting structure, which hulls may be rotated either separately or in unison to longitudinally align two or more hulls with substantial hydrodynamic continuity, whereby leeward hull buoyancy is increased to improve longitudinal stability. The drag incurred between the longitudinally-aligned hulls is substantially reduced by shaping the adjacent bow and stern to be conjugates, or by use of a fairing which extends the contours of the forward hull into the aft hull.