Abstract: Mixtures of liquid crystal compounds from among different classes of liquid crystal ester compounds are disclosed. The mixtures exhibit freezing points substantially lower than the freezing point of either ester compound alone, so as to provide a substantially improved (widened) smectic C mesomorphic temperature range and protection against freezing or crystallization of liquid crystal material over a range of temperatures at which an electrooptic display device would typically be operated.

Abstract: Melt-processable polyesteramides capable of exhibiting melt-phase anisotropy at temperatures of approximately 360.degree. C. and lower are disclosed. The polyesteramides contain certain essential 2,2'-substituted biphenylene radicals and repeating units which provide ester and amide linkages. The polyesteramides exhibit melt processability suitable for processing into films and fibers.

Abstract: A hologram is fabricated by opening a volume phase reflection hologram formed in a recording medium such as a positive photoresist. The opening occurs by forming a second hologram, such as an off-axis hologram, in the same recording medium. The opened hologram can be replicated in metal and the metal can be used to emboss the fringe pattern of the opened hologram into plastic. A full range of colors in the visible spectrum may be obtained by metallizing the embossed plastic structure and then by overcoating it with appropriate clear dielectric layers.

Abstract: A chemical vapor deposition method which utilizes a rare earth chelate vapor as a source of rare earth ions for producing an optical fiber having a core with a high rare earth content.

Abstract: Light polarizers stabilized against effects of temperature and humidity are provided by a silylation method whereby a polyvinyl alcohol light-polarizing sheet is treated with an organosilane and is heated to bond the organosilane to the polyvinyl alcohol surface and to thereby silylate the surface thereof.

Abstract: An electrical power interrupting tether system for a multiple-joint, anthropomorphic robot arm that substantially improves robot arm operational safety. The tether system includes a robot arm and auxiliary equipment power-interrupting electrical robot arm member by a set of braided steel wires. A pair of conventional robot arm and auxiliary equipment power-interrupting limit switches actuated by excessive rotational robot arm movement are also provided. Movement of the robot arm beyond a predetermined safety zone defined by each arm-member-tethering wire and the limit switch pair will cause electrical power interruption to both the robot arm and to auxiliary equipment associated therewith to thereby preclude potentially unsafe movement of the robot arm beyond the above-defined safety zone.

Abstract: A liquid crystal display is disclosed having silylated polyvinyl alcohol polarizing layers.

Abstract: A printer having clutches for selectively transmitting the driving power from a single motor to a rotary shaft for rotating the type wheels and to a hammer drive shaft for driving a hammer is described. The clutches are under the control of a single controlling member so that the typing operation can be accomplished by the power furnished by a single motor having a shaft which need rotate continuously in one direction only.

Abstract: Pretension threading device which includes two thread deflecting means supported on opposite sides of a pretension, and arranged to deflect thread caught and drawn into the thread deflecting means into wrap around the pretension. One thread deflecting means extends to beyond the pretension in a direction away from a thread supply tapering to a point beyond the pretension spaced from the adjacent sewing machine housing. The other thread deflecting means lies in covering relationship to the pretension, terminating at the pretension and tapering beyond the pretension device in a direction away from the thread supply to the adjacent sewing machine housing.

Abstract: A cabinet and work table for a sewing machine having a convertible work supporting bed capable of conversion from a flat work supporting bed to a cylinder bed. The cabinet work supporting surface is divided into two parts, a fixed rear work supporting surface and a laterally shiftable front work supporting surface. The sewing machine is supported in the cabinet with the flat work supporting bed forwardly of, co-planar and contiguous with the fixed work supporting surface. The shiftable work supporting surface of the cabinet is laterally shiftable from a position co-planar with the fixed work supporting surface of the cabinet and the flat work supporting bed of the sewing machine to a position subjacent the flat work supporting bed of the sewing machine and the fixed work supporting surface of the cabinet whereupon the flat bed may be converted to cylinder bed use.