Abstract: An improved fiber-optic inertial sensor of the Sagnac interferometer type is provided with the capablility of precise linear measurement of sensed motion. The sensor uses closed-loop synchronous demodulation of sensed signals representative of angular motion in a manner that permits operation over a wide dynamic range in inertial rate along with null stability and a high degree of noise rejection.

Abstract: This invention discloses a horizontal multistage press which comprises a pair of frames disposed upright in face-to-face relationship with each other, at least one upper lateral beam disposed to connect the upper portions of the abovementioned pair of frames, at least one lower lateral beam disposed to connect the lower portions of the pair of frames, rails disposed on at least either of such pair of upper and lower lateral beams and extending along the length thereof, a multiplicity of hot plates disposed parallel to one another between the pair of frames and supported by the rails for reciprocal movement along the length of such rails, a multiplicity of unprocessed sheets being heat-pressed between the hot plates, at least one urging means disposed on at least one of the frames for urging the multiplicity of hot plates toward and away from one another, and travel members for loading and unloading the unprocessed and processed sheets in and from the gaps between the hot plates, such travel members including

Abstract: The sealing apparatus is designed to automatically maintain the pressure of a buffer fluid above that of the sealed fluid. The apparatus consists of a cylinder (1) which has a movable piston (4, 5) therein. The piston (4, 5) is coupled to a valve shaft (8) and a first chamber (Z) in communication with sealed fluid is disposed on one side of the piston and a second chamber (Y) is on the other side of the piston for continuous communication with the buffer fluid. Recharging means in the form of a valve (12) and third chamber (X) which contains buffer fluid is a pressure greater than (Y) are associated with the second chamber (Y) so that in response to failure of seals the buffer fluid pressure drops in chamber (Y) and the pistons (4, 5) rise so that shaft mounted valve (12) is disengaged from valve seat (14) allowing high pressure buffer fluid to be transferred from chamber X to chamber Y.

Abstract: A high-power, end-fed, circular, non-coaxial waveguide UHF-TV broadcast antenna comprising a single-moded, circular, non-coaxial waveguide having an inside diameter dimensioned to support only the circular non-coaxial TE.sub.11 mode of energy propagation through the waveguide at the design frequency of the operating frequency band, the waveguide having multiple radiating elements removing energy from the waveguide at intervals along the length of the waveguide, and conductive means extending transversely across the interior of the waveguide at least in the regions between longitudinally adjacent pairs of the radiating elements, the conductive means being perpendicular to the electric field vector of the TE.sub.11 -mode energy having a desired polarization, for suppressing TE.sub.11 -mode energy that is cross-polarized relative to the desired polarization, the waveguide and the conductive means defining a feed port at one end of the waveguide for receiving UHF-TV signals having the desired polarization.

Abstract: A horizontal multiplaten press used for pressing sheet materials under heat for making plywood, decorative laminate or veneer. It has a pair of vertically disposed and horizontally spaced apart frames. At least one upper beam and at least one lower beam extend horizontally to connect the frames at their upper and lower ends, respectively. Rails are provided on each beam and extend along its length. Heating platens are vertically disposed between the frames in parallel to one another and are horizontally movably supported on the rails. The platens define therebetween a plurality of spaces in which the sheet materials to be heated and pressed can be vertically disposed. At least one urging device is provided on at least one of the frames for moving the platens to and away from one another. A mechanism is provided on the rails on at least one of the beams for allowing the deformation of each platen in a vertical direction.

Abstract: A patient dependent on extracorporeal treatments is subjected to minimal insertion trauma and pain both before and after a fistula operation. A phlebotomy method is disclosed using a veno-occlusive tourniquet or ligation occluding a venous segment at a location between the inlet and return openings of a dual lumen catheter so that a high blood flow rate can be obtained for an extracorporeal treatment system, thereby lessening or delaying the need for a fistula operation. Registration or alignment of the veno-occlusive tourniquet or ligation is ensured by an attachment to the catheter. Preferably the tourniquet or ligation includes an elastic band threaded to the attachment. If a fistula operation becomes necessary or has been performed, insertion trauma and pain is minimized by using a dual-lumen needle having a tapered distal end portion terminating in a beveled cutting edge.

Abstract: The present invention relates to the location of biological cells 5 in a predetermined spatial disposition relative to each other on a solid non-biological substrate. According to the invention an extended generally planar surface of the substrate is provided with a plurality of surface discontinuities 4 at least partly defining cell adhesion enhanced and/or cell-adhesion orienting zones having a width of from 0.2 to 20 micrometers in a predetermined relation to each other and substantially spaced apart from each other. When a plurality of the cells 5 in a physiologically acceptable medium is brought into contact with said substrate surface cells attached to the substrate surface preferentially and/or in preferential orientations at said discontinuities 4.

Abstract: A low-level liquid scintillation measurement system for counting sample optical events resulting from the radioactive decay of a constituent of a sample to be measured while reducing the counting of background optical events which are optical events produced by background radiation and which create electrical pulses other than pulses representing a sample optical event.

Abstract: A flexible coaxial cable assembly that can be efficiently packaged and shipped in segments and installed and assembled in the field. The cable includes strain insulators spaced along the length of the region between the inner and outer conductors to transmit stresses such as differential thermal expansion and contraction between the conductors. The inner conductors of successive cable segments may be rigidly joined to each other to prevent relative movement between the inner conductors of adjacent cable segments. The inner and outer conductors can be corrugated.

Abstract: A clock-controlled pulse width modulator comprising an integrator for receiving a variable input voltage and producing an output having a triangular waveform, the integrator including a capacitor which is charged at a rate proportioal to the input voltage and discharged at a rate proportional to the difference between a reference voltage and the input voltage, the charging and discharging occurring during a time interval T.sub.o, a clock pulse source for generating a continuous series of clock pulses, a counter receiving the clock pulses and producing a binary control signal which changes state in response to the counting of a preselected number of clock pulses, the control signal having a period T.sub.

Abstract: Apparatus for machining splines on the internal surface of a tubular member comprising cutter means for forming the splines on the internal surface; a carrier for the tubular member for enabling the tubular member to be moved in an axial direction relative to the cutter means; and means for angularly indexing the cutter means relative to the tubular member whereby splines at angularly predetermined intervals can be provided around the interval circumference of the tubular member.

Abstract: A LAN priority control system is described which uses an interrupt priority control structure which suspends transmission of a packet from a lower priority node and allows a higher priority interrupting node, which desires to transmit a higher priority message, to obtain rapid access to the transmission medium and to transmit the message. The message is interrupted using a within packet interrupt which is taken to include any command which results in the transmission of a packet onto a common-medium being halted before the complete packet has been transmitted. In addition, the priority of nodes can be adjusted by a centralized network manager or by intelligent terminals distributed among the nodes, allowing priorities to be adjusted at nodes to correspond to the relative priorities of messages currently at these nodes rather than having a fixed allocation of priorities. In a token ring implementation, suspension of the message causes a busy token to be released which recirculates round the ring.

Abstract: A fiber optic doppler anemometer comprises a source of coherent light, a directional coupler formed by the combination of a pair of single-mode optical fibers, and a photoelectric transducer. The first end of the first fiber receives an incident beam of light from the source and guides it through the directional coupler to the second end of the first fiber, which is located adjacent to a body of moving particles to be measured, where both the second end of the first fiber and the moving particles reflect a portion of the incident light back into the first fiber. The reflected light, which has a frequency different from that of the incident beam entering the first fiber, is directed back through the directional coupler which couples a portion of the reflected light toward the first end of the second fiber. The photoelectric transducer receives the light emerging at the first end of the second fiber and converts it into analogous electrical signals.

Abstract: A reflector-type microwave antenna includes a paraboloidal reflector and a feed horn located at the focal point of the reflector for launching microwave signals onto the reflector and receiving microwave signals from the reflector. A supporting frame for the reflector and feed horn includes three arms extending along the rear side of the reflector to three spaced mounting locations on the rear side of the reflector. The arms are fastened to the spaced mounting locations on the rear side of the reflector by fastening means having a loose condition in which the arm is attached to the reflector but free to move relative to the reflector, and a tightened condition in which the respective arm is rigidly attached to the reflector.

Abstract: An FM receiver for the reception of digital data modulated on a Subsidiary Communication Authorization (SCA) subcarrier is provided with automatic tuning capability and a coherent demodulator for minimizing noise, distortion and interference. The FM receiver is tuned automatically to minimize the measured amplitude of noise and distortion at the high frequency end of the spectrum of the FM demodulator output, above the frequencies of the SCA signal. The SCA signal is tuned by a heterodyne circuit including a balanced modulator, a voltage-controlled oscillator (VCO), and a bandpass filter. The VCO is automatically tuned to maximize the measured amplitude of the SCA signal selected by the bandpass filter. For coherent detection of BPSK (Binary-Phase-Shift-Keying), the coherent demodulator is preferably and kind of data-aided Costas loop in which digital logic circuits perform phase shifting, phase detecting, a multiplying functions.

Abstract: A cluster mounting system is provided for supporting a plurality of transmission line or coaxial cable runs in a non-interfering manner on a microwave transmission tower. The system uses a cluster mount member comprising a single strip of metal formed in such a way as to define a plurality of substantially flat mounting surfaces adjoining each other. The mounting surfaces are angularly disposed with respect to adjoining surfaces in such a way that cable carrying hangers may be affixed to each of the surfaces without contacting each other or the cable carried therein. The ends of the cluster mount member are provided with outwardly extending arms through which the cluster mount member and the plurality of hangers and cable supported thereupon may be rigidly mounted directly onto a leg of the transmission tower or a separate support member provided on the tower.

Abstract: The present invention relates to the treatment of potato tubers so as to reduce bacterial and other diseases therein and improve the keeping properties thereof.The invention relates to a method comprising the steps of size-grading G potato tubers (55) and then bringing substantially soil-free size-graded tubers (55) to a thermal treatment zone T in which they are immersed in a fluid (10) at a temperature of from 45.degree. to 85.degree. C., for a period of time sufficient to kill at least some microorganisms without significantly damaging the tubers. According to the invention the tubers (55) are then passed substantially directly, through a drying zone D, in which they are surrounded by a hot air flow (68) having a temperature of from 40 to 75 degrees C., to dry their outer surfaces following which they are brought to a cooling zone P.

Abstract: A double lumen catheter having an elongated tube with a proximal cylindrical portion enclosing first and second lumens separated by an internal divider, the proximal end of the elongated tube connecting to two separate connecting tubes communicating with the respective first and second lumens for the injection and removal of blood, the first lumen extending from the proximal end of the elongated tube to a first opening at the distal end of the elongated tube, and the second lumen extending from the proximal end of the elongated tube to a second opening spaced a sufficient distance away from the first opening, in the longitudinal direction, to prevent mixing of the returned blood with the blood taken in, the tube having a non-conical and non-tapered distal end portion having a reduced cross-sectional area and extending from said second opening and terminating in a blunt end to prevent the end of the catheter from traumatizing or becoming caught in the walls of a blood vessel into which the catheter is inserted

Abstract: A ferrite core antenna for use in the VHF and UHF range has a first coil on the core which is connected to a capacitance selected to resonate with the inductance of the coil at the desired frequency of operation. The ferrite core antenna also has a second coil for providing a signal to the input stage of a radio receiver. In contrast to conventional loopstick antennas for low frequencies, the operation of the ferrite core antenna in the VHF to UHF range is remarkably improved by using an input stage having a relatively high input impedance and using a greater number of turns in the second coil than the first which is tuned instead of the second. Preferably the first coil is centrally disposed and has a single turn in the form of a relatively wide band of conductive metal foil, and the second coil is offset by a certain distance from the first coil and feeds an input signal to the gate of a gallium arsenide field-effect transistor.