Abstract: This system is for use by a visitor to a facility that has multiple occupants, public-subscriber or other phone service, and an individual phone outlet at each occupant's part of the facility. A microphone and speaker are provided so that a visitor seeking access can speak with an occupant. A communication circuit carries signals between (1) the mike and speaker and (2) the phone service--to enable the conversation through an individual phone outlet. Manual controls, preferably including a standard phone keypad, are positioned for use by the visitor. An electronic memory holds directory information, particularly including occupant names and corresponding dial-up codes. An LCD, behind a protective window, shows the visitor the directory data. Names and other directory data can be fed into the memory remotely, preferably through either: ordinary phone connections using standard DTMF signals--with automated confirmation of input data by a voice-synthesis chip--or a modem.

Abstract: A liquid-crystal display preferably eighteen lines of forty characters each, is mounted in a case. The temperature of the display medium is held within operating limits for the display--notwithstanding ambient temperature and humidity variations over generally normal ranges for at least the temperate zones, and even if the display unit receives direct sunlight. The unit works outdoors, at temperatures to at least 46.degree. C. (115.degree. F.) as well as in buildings with no temperature control. This is accomplished by use of a shading hood, and a window (preferably unperforated polycarbonate, curved, upward-and-outward-concave, and cylindrical-segment) that reflects to a viewer only light from the hood underside. No ventilating fan, plenum or other ventilating opening is needed. A circuit-board-mounted temperature sensor controls the contrast-adjusting voltage of the display--using data in a digital-memory "look up" table. A heater is preferably provided, also temperature-controlled.

Abstract: A local communication apparatus (e.g., a modem) is arranged to detect when a remote communication apparatus desires to switch from the data mode and enter a command/control mode. To accomplish mode switching, the remote apparatus sends a scrambled escape pattern, scrambled using a proprietary polynomial, over the data channel. After detecting the escape pattern the local apparatus switches to the command/control mode. In this mode, the remote and local apparatuses communicate using the proprietary scrambler/descrambler polynomial.

Abstract: A liquid-crystal display, preferably twenty-five lines of eighty characters each, is mounted in a case. The temperature of the display medium is maintained within operating limits for the display--notwithstanding ambient temperature and humidity variations over generally normal ranges for at least the temperate zones, and even if the display unit is placed to receive direct sunlight. The unit works outdoors as well as in buildings that lack temperature control. This is accomplished preferably by circulating air from outside the case through a space between the display face and an unperforated protective polycarbonate window. Intake and exhaust plena are long and narrow enough to deter manual access to the display and thus van dalism; however, the plena are straight and sufficiently free of obstructions that the fan can be a very small, low-power, quiet unit. A temperature sensor controls the fan, and also the contrast-adjusting voltage of the display --based on data in a digital-memory "look up" table.

Abstract: A liquid-crystal display, preferably twenty-five lines of eighty characters each, is mounted in a case. The temperature of the display medium is maintained within operating limits for the display--notwithstanding ambient temperature and humidity variations over generally normal ranges for at least the temperate zones, and even if the display unit is placed to receive direct sunlight. The unit works outdoors as well as in buildings that lack temperature control. This is accomplished preferably by circulating air from outside the case through a space between the display face and an unperforated protective polycarbonate window. Intake and exhaust plena are long and narrow enough to deter access to the display and thus vandalism; however, the plena are straight and sufficiently free of obstructions that the fan can be a very small, low-power, quiet unit. A temperature sensor controls the fan, and also the contrast-adjusting voltage of the display--based on data in a digital-memory "look up" table.

Abstract: Metal carrier rolls having a mass of at least about 100 pounds for use in paper making, non-woven fabric making and other applications are balanced to within a predetermined first residual unbalance value for rotation of the roll up to a predetermined maximum service speed of at least about 100 RPM, preferably within a Balance Quality Grade G-6.3 residual unbalance value, by fabricating a pair of substantially identical removably mountable metal journals, each being balanced to within a second residual unbalance value less than the first residual unbalance value, preferably to within a Balance Quality Grade G-2.5 residual unbalance value, fabricating a body assembly including a hollow metal body with a pair of metal end heads each being adapted for removably mounting a journal, the body assembly being balanced to within a third residual unbalance value less than the difference between the first and twice the second residual unbalance values, and, preferably, within a Balance Quality Grade G-2.

Abstract: A firing pin force transducer for use with firearms is disclosed. Impact of he firing pin on a simulated primer housed in a cartridge facsimile is transduced into an electrical signal by a foil strain gage and fed into a signal conditioner. The amplified signal is recorded by a digital oscilloscope allowing the operator to determine the force and energy expended by the firing pin.

Abstract: A wiring harness is provided which, among other uses, allows quick and convenient installation of lights on a Christmas tree. Preferably, the wiring harness includes a flexible, resilient, C-shaped ring body having a channel-shaped cross section with an interior surface; a plurality of electrical receptacles received within a corresponding plurality of cavities defined in the interior surface of the ring member; and a conductor pair electrically intercoupling the receptacles with an electrical plug. In advantageous use, the harness, with a plurality of strands of tree lights already plugged into the receptacles, is spread apart, placed about the upper boughs of the tree and released whereupon the essential labor is completed for placing the lights on the tree.

Abstract: To mimimize the weight of a magnetic tape recorder chassis and cabinet assembly, a wire frame chassis (18) carrying printed circuit board guides (20) and connectors (22) is mounted to one side of a sand cast bezel (24), and polyurethane wall panels (16) are secured to the wire frame. A cabinet cover and underlying tape transport assembly are hinged to the bezel to enable pivoting away from the wire frame, exposing circuit boards for servicing. The "open air flow" characteristic of the wire frame chassis (18) helps cool critical electrical components.

Abstract: A conventional Webb cotton press is modified to change the path of bale movement 90.degree.. In additon, an improved debander is located adjacent the new entry location to the press. At the end of one cycle of press operation, a pusher associated with the debander advances a debanded bale into the press which pushes the finished bale out of the press. A heading mechanism is provided to square an unbanded bale push into the press.

Abstract: Tertiary phosphine oxides are reduced to the corresponding phosphines by halosilanes in the presence of a stoichiometric amount of a primary or secondary amine. The reduction in yield expected using a primary or secondary amine in place of the prior art tertiary amine is not observed.

Abstract: An apparatus for the in viva acquisition of fluid samples from birds, fish, whales, and other mammals. The apparatus may also be used with equal proficiency for injecting fluids such as anesthetics, into the bird, mammal or other creature. When used in either manner, the apparatus is fully automatic. Once it is affixed to the animal, fluid samples can be taken or fluids injected while the animal freely moves about in its natural habitat at remote locations from the researcher.

Abstract: Triorganophosphines are prepared in high yield and purity by the simultaneous addition of an organomagnesium halide and a phosphorus trihalide to a reaction mixture in a 3:1 molar ratio, respectively. The reaction mixture also contains a linear ether or a heterocyclic ether wherein the ring contains 5 or 6 atoms.

Abstract: A process for reducing BOD in aqueous food processing plant wastes which comprises subjecting such wastes to the following series of sequential steps:A. adjusting the pH of the waste to 3 or less to form finely divided suspended particles;B. readjusting the pH of the waste with sodium aluminate to a value within the range of 6-7.5;C. flocculating the particles with an anionic acrylamide polymer; and thenD. removing and collecting the flocculated particles from the food processing plant wastes.

Abstract: An inertia insensitive disconnectable drive linkage connects a power operator to a swinging door and comprises a door bracket fixed to the door and an arm operator pivoted thereto. A latch positively locks the operator arm to the bracket during normal powered swing of the door. A cam on the door frame releases the latch when the door is swung beyond the door closed position in the opposite direction of opening during emergency operation.

Abstract: To minimize the weight of a magnetic tape recorder chassis and cabinet assembly, a wire frame chassis (18) carrying printed circuit board guides (20) and connectors (22) is mounted to one side of a sand cast bezel (24), and polyurethane wall panels (16) are secured to the wire frame. A cabinet cover and underlying tape transport assembly are hinged to the bezel to enable pivoting away from the wire frame, exposing circuit boards for servicing. The "open air flow" characteristic of the wire frame chassis (18) helps cool critical electrical components.