Abstract: This invention relates to cryptographic teletypewriter systems and more picularly to an electronic device for use in such systems which automatically provides permutations of a Vigenere Square.

Abstract: A flow-through centrifuge free of rotating seals. The centrifuge includes a frame having three spaced apart horizontal plates which carry a central bowl, a countershaft and a tube-supporting hollow shaft. A motor is arranged to drive the frame at an angular velocity of .omega.. The countershaft is driven by a stationary pulley on the motor and drives the bowl at an angular velocity of 2.omega.. The motion of the countershaft is also transferred to the tube-supporting hollow shaft by a pulley coupling having a ratio which effects rotation of the hollow shaft, with respect to the frame, at an angular velocity of -.omega..

Abstract: Felted cellulosic sheet material is treated with a solution of an alkali al borohydride in order to improve and stabilize its strength and brightness. A subsequent wash with deionized water or preferably an aqueous solution containing an alkaline earth metal hydroxide, carbonate, or bicarbonate further improves the stability of the brightness and strength of felted cellulosic sheet material. The washing of cellulosic sheet material is most efficiently accomplished in an apparatus providing a means to add a metered amount of alkaline earth metal hydroxide, carbonate, or bicarbonate to a continuously flowing stream of wash medium.

Abstract: An optical paper detector for use in conjunction with a printing press for sensing the undesirable condition of more than a single sheet of paper being simultaneously fed to the press. The optical paper detector is comprised of an array of wide angle phototransistors connected in parallel which uniformly sense light transmittance through the paper over a relatively large and continuous area to provide an averaging effect so that the optical paper detector is relatively insensitive to local variations in light transmittance. The optical paper detector is equipped with a flat cover that permits flush mounting and provides a self-cleaning wiping action.

Abstract: The present invention is a clamping arrangement for the pins of a stamp perforating cylinder. A plurality of cavities are arranged in a checkerboard fashion on the surface of the stamp perforating cylinder. The pins are mounted along the side walls of the cavities and extend radially outwardly from the surface of the cylinder. The pins are held firmly in place within each cavity by a clamping member, a screw and an elastomer ring. The elastomer ring is installed at the base of the cavity and is held in place by the clamping member and screw. The screw and the clamping member coact to compress and displace outwardly the elastomer ring thereby firmly grasping the pins mounted along the side walls and securing the pins against movement. The clamping arrangement provides for retention of the pins while at the same time it permits easy removal and replacement of individual pins.

Abstract: An apparatus is provided which can assist in determining the presence or absence of a venous obstruction such as occurs in hemorrhage or inflammatory conditions affecting the veins by measuring the precentage change in electrical impedance of the veins caused by their temporary forced blockage. This measured change in impedance, normalized with respect to a baseline impedance measured during normal respiration, provides a sensitive index which is indicative of the presence or absence of a clot or constriction.

Abstract: Novel hentriacontapeptides having the following amino acid sequence:H-Tyr-X-Gly-Phe-Met-Thr-Ser-Glu-Lys-Ser-Gln-Thr-Pro-Leu-Val-Thr-Leu-Phe-Lys -Asn-Ala-Ile-Ile-Lys-Asn-Ala-Tyr-Lys-Lys-Gly-Glu-Ywherein X is a chiral residue of a D-amino acid selected from the group consisting of D-alanine, D-leucine, D-isoleucine, D-valine, D-phenylalanine, D-tyrosine, D-tryptophan, D-serine, D-threonine, D-methionine, D-glutamic acid, D-glutamine, D-aspartic acid, D-asparagine, D-lysine, D-proline, D-histidine or D-arginine; Y is selected from the group consisting of hydroxy, amino, loweralkylamino, diloweralkylamino and lower alkoxy; and the pharmaceutically acceptable salts thereof; intermediates useful in making the novel compounds and pharmaceutical compositions and methods employing the novel compounds.

Abstract: An apparatus for spreading a coherent light beam produced by a laser or lasers into a selected pattern. The selected pattern of coherent light, generally a ribbon-like shape, can be used to place a desired amount of electromagnetic energy at a selected frequency for a selected time period on a generally flat surface. The projected coherent light pattern can be used to cure or dry inks without scorching the underlying paper. The control of the intensity of the coherent light allows drying operations at higher speeds than currently feasible.

Abstract: A vehicle barricade including a barrier plate which can be raised or lowe and a counterweighted sector mounted near the side of the barrier plate. The counterweight is mounted on the sector so that the barrier plate will remain in the raised or lowered position without independent mechanical aid. The barricade is so constructed and secured that it is able to withstand impact from either heavy or light vehicles. The barricade may also be reenforced by placing auxiliary pillars adjacent to the barrier plate and which pillars cooperate with the barrier plate to further secure it when raised.

Abstract: 1.

Abstract: This invention relates to solutions of selected organo-metallic compounds ssolved in an organic solvent which are useful for deacidifying a cellulose fiber paper. The paper is treated by means well known in the art, such as dipping or spraying. The organo-metallic compounds useful in this invention are compounds which may be rapidly hydrolyzed to an alkaline material such as lower alkyl compounds of lithium, aluminum, magnesium, gallium, zinc, and mixtures of these compounds. The organic solvent is a liquid which will not react with the organo-metallic compound, dissolve inks, or cause discoloration of other materials usually found in and around printed matter. After the paper is impregnated with the solution the organo-metallic compound remaining on the paper is hydrolyzed to an alkaline material.

Abstract: A direction finding receiver contained in a hand held portable housing with a ferrite rod antenna mounted in and protruding through the housing so that when the antenna axis points to the radio frequency signal source to be direction found, a null is obtained in the signal level. The antenna is coupled to the receiver circuit which comprises a broadband fixed tuned radio frequency amplifier having low sensitivity, a modulation oscillator used to modulate the broadband fixed tuned rf amplifier by tone injection when a steady carrier is present, a demodulator for demodulating the rf signal, and an audio amplifier for amplifying the demodulated signal.

Abstract: A method of deacidifying paper wherein the paper has a substantially cellulose fiber base or substrate by exposing the paper to the vapors of a volatile organometallic compound and subsequently decomposing said compound to a base or alkaline material in situ. The treated material is usually first dried in vacuo and exposed under anhydrous or nearly anhydrous conditions to the organic-metallic compound. The method has the advantage of being able to treat large quantities of material at any one time.

Abstract: A composition for use in Deacidification of Paper, which comprises 0.1 to 20% by weight of methyl magnesium carbonate in an organic solvent, where the solvent is not harmful to the paper.