Abstract: A switchable color filter (11) includes three polarizing filters (12, 14, and 16) and two zero to substantially half-wave optical retarders (36 and 38) and is incorporated in a field sequential display system (10) to provide output states of light of three different colors to form an image in full color. Each one of four preferred embodiments (11, 11a, 11b, and 11c) of the switchable color filter provides the output states of three colors. The third and fourth preferred embodiments (11b and 11c) provide a fourth additional output state of, respectively, white light and light of a color which is a combination of two of the other output state colors. The optical retarders comprise nematic liquid crystal cells (100) having fast relaxation times to operate the display system at video rates.

Abstract: A passenger lift (10) is provided for loading a passenger (12) into and out of an aircraft (14). Lift (10) includes a chassis (38) having a front (34) end and a back (36) end. A plurality of wheels (62 and 63) are attached to the chassis (38) providing devices for moving the lift (10). The lift (10) also includes an electrical energy source (70) for providing electrical energy, and an energy converter (104) for translating the electrical energy from the electrical energy source (70) to mechanical energy. The lift (10) includes a rear support (40) generally perpendicular to the chassis (38) and attached to the back end of the chassis (38). The lift (10) has a basket (48) for holding the passenger (12) while the passenger is raised and lowered with the lift (10) and (48) is located at the front end of the chassis (38). The lift (10) includes a pair of lift arms (44) for lifting the basket (48), and a pair of stabilizing arms (42) for providing stability to the basket (48).

Abstract: A full color stereoscopic hard copy is printed using a first group of color inks that reflect one handedness of circularly polarized light and a second group of color inks that reflect the opposite handedness of circularly polarized light. One image of a stereo pair is printed using the first group of inks and the other of the stereo pair is printed using the second group of inks.

Abstract: A switchable color filter (11) includes three polarizing filters (12, 14, and 16) and two zero to substantially half-wave optical retarders (36 and 38) and is incorporated in a field sequential display system (10) to provide output states of light of three different colors to form an image in full color. Each one of four preferred embodiments (11, 11a, 11b, and 11c) of the switchable color filter provides the output states of three colors. The third and fourth preferred embodiments (11b and 11c) provide a fourth additional output state of, respectively, white light and light of a color which is a combination of two of the other output state colors. The optical retarders comprise nematic liquid crystal cells (100) having fast relaxation times to operate the display system at video rates.

Abstract: Dissipation of heat from a socketed leadless electronic chip-carrier package is promoted by a heat-conducting metal socket cap distinctively overlying and guiding heat away from the socketed package fully along a broad planar surface area, the socket cap being of a unitary construction which both mechanically holds the package securely mated with a multi-pin socket and also cools the package by way of an integrated array of heat-radiating elements; edge clasping of the cap with a chip-carrying socket avoids interference with needed conduction of heat away from central areas of the package and cap.

Abstract: A field sequential color display system incorporates a color switch which includes a zero to half-wave optical retarder and pleochroic filters to provide an image with high color contrast and resolution over a broad range of display sizes. In a preferred embodiment, a liquid crystal cell which operates between two states of optical retardation comprises the variable retarder to provide a color switch with substantially reduced optical response times.

Abstract: In dissipating heat from miniature electronic devices, circuit modules, or the like, and particularly from dual-in-line package (DIP) type units having leads depending from opposite sides of a thin molded rectangular-parallelepiped body, an elongated sheet-metal strip of heat-radiating elements disposed above and in spaced relation to the top of the package has its opposite ends integrally connected with separate spaced heat-conducting clip members which are cantilevered from it in different directions to fit respectively about the top and bottom surfaces of the package and to flex so as to accommodate insertion of the package between them and yet adjust themselves into desirable broad-area abutments with those surfaces.

Abstract: Auxiliary heat-sink attachments which promote dissipation of heat from electronic solid-state devices and the like are secured with such devices and with associated printed-circuit boards by way of accessory fastenings with which they form a sub-assembly wave-solderable in pre-spaced relation to the board.

Abstract: The present invention provides a system for reducing the unproductive consumption of energy by equipment primarily intended to be operated during the presence of a person or thing in the area of operation of the equipment. The system renders the equipment operable during the time a person or thing is present within the area of operation and for a short period of time immediately thereafter. Except for the short period of time immediately after the person or thing exits the area of operation, the system renders the equipment inoperable during the time the person or thing is absent from the area of operation. Maintaining the equipment operable during the short period of time after the person or thing exits the area of operation reduces deleterious recycling which would otherwise occur in the event the area of operation were reentered within the short period of time.

Abstract: Dissipation of heat from miniature solid-state devices and the like is achieved by a resilient heat-sink structure which opens to receive a tab or other heat-transfer body freely between two relatively-movable oppositely-disposed broad-area portions of the structure and which then closes and yieldingly holds the two portions about the body as shaped end connectors are sprung and locked as the result of simple manipulations.

Abstract: Dissipation of heat from miniature solid-state devices and the like is achieved by a resilient heat-sink structure which opens to receive a substantially flat tab or other heat-transfer body freely between two relatively-movable oppositely-disposed broad-area portions of the structure and which then closes and yieldingly holds the two portions about the body as shaped end connectors and sprung and locked as the result of simple manipulations.

Abstract: A nozzle body of a molded spray head forms a path for a highly pressurized carrier fluid. The fluid path includes a rectangular-section, diverging outlet and a spray nozzle spaced upstream therefrom in a suction chamber for directing the carrier fluid in a spray pattern spaced inwardly of and parallel to the walls of the diverging outlet. A chemical product is selectively passed into the suction chamber for entrainment about the carrier fluid. Avoiding impingement of the carrier fluid spray upon the walls of the nozzle outlet helps to maintain the 600-1000 psi pressure of the carrier fluid flow throughout the nozzle body for increased impact pressure upon surfaces to be sprayed.

Abstract: A new cultivar of Rosmarinus officinalis plant named `Renzels` characterized by its unique combination of rich blue-violet flowers on a shrub that exhibits great vigor and an extremely prostrate habit.