Abstract: A cassette for controlling the flow of IV fluid from a patient to a source. The cassette preferably includes, along the fluid passage through the cassette, first and second membrane-based valves on either side of a pressure-conduction chamber, and a stopcock-type valve. The stopcock valve is preferably located downstream of the second membrane-based valve, which is preferably located downstream of the pressure-conduction chamber. The stopcock control valve preferably has two rigid cylindrical members with complementary surfaces, wherein one member includes a tapered groove defined on its complementary surface. The two complementary surfaces define a space therebetween, instead of having an interference fit, and a resilient sealing member is disposed in this space.

Abstract: A disposable cassette for mixing a drug in a vial includes a liquid inlet for connection to a liquid supply, a first vial spike, a second vial spike, a chamber and a valve mechanism. The chamber, the first and second vial spikes, and the liquid inlet are in fluid communication with each other. The valve mechanism may be actuated to control flow between the chamber, the vial receptacles and the liquid inlet.

Abstract: A system and method for controlling an electrically controlled pressure relief valve may use a soft position control loop to control the position of the valve. A pressure relief valve may also include a modified orifice shape to improve stability, to uniformly distribute the effective bandwidth over the valve operating range, and to provide a tunable default mode.

Abstract: A projectile which would ordinarily be a spinning artillery shell is segmented so that the forward segment can be deflected relative to the rear segment for aerodynamic directional corrections in flight. Fins provide the projectile spin and a motor in the rear segment rotates an angle drive means with a velocity equal and opposite to the rotation of the rear segment, so that the angle drive means can establish an angle which has a fixed orientation on an earth coordinate reference frame despite the spinning of one or both portions of the projectile. Ground or sea-based radio and radar communications or an on-board roll reference system continuously communicates with the projectile, informing it of its own rotation rate and providing command signals for the nose deflection needed to establish the proper real-time trajectory correction.

Abstract: This invention relates to heat and light stabilizer compositions for vinyl halide resin compositions comprising organotinthioalkanol compounds that are stabilized against gelation and precipitation, to methods of preparing the stabilizer compositions, and to stabilized vinyl halide resin compositions.

Abstract: Non-toxic organotin catalysts containing at least one direct oxygen-to-tin bond and one direct carbon-to-tin bond are provided for use as esterification catalysts in the production of non-toxic polyester and polyester-containing compositions. Articles made from such polyester and polyester-containing compositions are suitable for use in regulated food, beverage, pharmaceutical, and medical-device applications.

Abstract: To decrease the time required to charge parasitic capacitances, and to thereby increase the maximum permissible switching frequency to which a logic circuit can respond, a GaAs device is disclosed having a current-injecting circuit that generates an initial pulse of capacitor-charging current during a "0"-to-"1" transition in the output state of a GaAs device. The pulse is sufficiently large to quickly charge the parasitic capacitances, and of sufficiently brief duration so that a minimum line width is permissible which is substantially equivalent to that which would be applicable in the absence of the current-injecting circuit.

Abstract: Organotin stabilizer compositions containing more than 5 percent by weight of monoalkyl tin derivatives of mercaptoacetic acid esters, such as mono-n-octyltin-S,S',S"-tris(isooctyl mercaptoacetate), are useful as food-grade stabilizers for vinyl halide polymers.

Abstract: Vinyl chloride polymers suitable for use in food packaging materials are stabilized against discoloration and embrittlement resulting from exposure to heat using mono-n-octyltin compounds of the general formula H.sub.17 C.sub.8 Sn(SCH.sub.2 COOR').sub.3, wherein R' represents an alkyl radical containing eight carbon atoms.

Abstract: Monoalkyl tin derivatives of mercaptoacetic acid esters, such as mono-n-octyltin-S,S', S"-tris(isooctyl mercaptoacetate), are useful as food-grade stabilizers for vinyl halide polymers.

Abstract: This invention relates to novel organotin compounds containing at least one sulfur atom that is bonded exclusively to tin or to tin and hydrogen. The compounds are derivatives of mercaptoalkanols, which are present as the free alcohols, as esters of polycarboxylic acids, esters of acids containing specified non-metallic elements or as alkoxides of specified metallic elements. The compounds are effective catalysts for a variety of reactions and impart heat stability to halogen-containing resins.

Abstract: In accordance with certain of its aspects, this invention relates to stabilizing compositions; to stabilized polymers; and to the process for preparing a novel halogen-containing polymer stabilized against the deteriorative effect of heat which comprises adding to a halogen-containing resin a stabilizing amount of: a first stabilizer having the formula RSn(SR').sub.3 wherein R is selected from the group consisting of methyl, butyl and octyl radicals and R' is a residue of a carboxylic acid ester derived from acetic or propionic acid and a monohydric alcohol containing between 8 and 12 carbon atoms or a dodecyl hydrocarbon radical; and a second stabilizer of the formula R".sub.2 Sn.dbd.S wherein R" represents a monovalent hydrocarbon radical selected from the group consisting of methyl and butyl radicals.

Abstract: Finely divided or vaporized organic and inorganic tin compounds are conventionally applied to heated glass articles to produce a coating of stannic oxide on the article. Superior coatings are obtained when the tin compound is butyltin trichloride. This compound offers the additional advantage of being recoverable in substantially pure form.

Abstract: The coefficient of friction of glass is decreased and the scratch resistance is improved by applying finely divided or vaporized butyltin trichloride to the heated glass articles to produce a coating of stannic oxide on the glass. The glass is then coated with a conventional lubricating wax.

Abstract: The flame retardancy imparted to synthetic organic polymers by a halogen source is significantly increased by the presence of zinc sulfide in the polymer composition. One or more specified basic compounds are optionally included to neutralize any acidic materials generated during pyrolysis of the polymer composition.

Abstract: Hexaorgano distannanes of the general formula R.sub.3 Sn--SnR.sub.3 significantly reduce or eliminate the discoloration which occurs when mixtures containing an alkali metal salt of a lactam are stored under an inert atmosphere for extended periods of time at temperatures between ambient and 100.degree. C. R in the foregoing formula represents a monovalent hydrocarbon radical containing between 1 and 20 carbon atoms.

Abstract: The melt viscosity of vinyl chloride polymers is effectively stabilized using linear polysulfides containing specified elements or organic radicals as terminal groups on the chains of sulfur atoms.

Abstract: Certain organotin halides can be recovered in substantially quantitative yield from aqueous media containing an ammonia or amine complex of these halides by adding (1) a non-reactive highly soluble inorganic salt to partially or completely saturate the solution and (2) an amount of a suitable mineral acid sufficient to decompose said complex and then heating the resultant solution as required to effect a separation of the resultant organotin halide from the aqueous phase.

Abstract: Hexaorgano distannanes of the general formula R.sub.3 Sn-SnR.sub.3 significantly reduce or eliminate the discoloration which occurs when mixtures containing an alkali metal salt of a lactam are stored under an inert atmosphere for extended periods of time at temperatures between ambient and 100.degree.C. R in the foregoing formula represents a monovalent hydrocarbon radical containing between 1 and 20 carbon atoms.

Abstract: Vinyl chloride polymers suitable for use in food packaging materials are stabilized against discoloration and embrittlement resulting from exposure to heat using mono-n-octyltin compounds of the general formula H.sub.17 C.sub.8 Sn(SCH.sub.2 COOR').sub.3, wherein R' represents an alkyl radical containing eight carbon atoms.