Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4094576 | Straight-line optical scanner using rotating holograms A flat disk contains a number of holograms made from the interference of a plane wavefront with spherical wavefront modified by a first cylindrical lens. The disk is rotated so that a plane reconstruction wavefront sweeps across the holograms. The resulti... | 06/13/1978 |
| 3953105 | Holographic scanner utilizing auxiliary reflective surface An apparatus which includes an optical spinner having a surface rotatable about an axis that is substantially perpendicular to the surface at its point of intersection with the axis. A source of coherent radiation is directed toward the surface and a zone... | 04/27/1976 |
| 3940202 | Light beam deflection system A light beam deflection system for producing diffracted light having a holographic light beam deflection disc bearing a record of unidimensional fringe patterns along the radial axis on a time division basis over a circumferential portion of the disc, and... | 02/24/1976 |
