A system and method using a Costas loop to effect accelerated convergence with minimal system complexity. The system comprises an in-phase-limiter and a quadrature-phase limiter, operatively coupled to an EXCLUSIVE-OR gate, for exclusively-ORing an in-phase-sign signal and a quadrature-phase-sign signal to output a first error signal, responsive to the signals having same signs, or a second error signal, responsive to the signals having different signs. An AGC circuit, operatively coupled to an ...

The subject invention concerns novel compounds that are useful as long-acting local anesthetics. The compounds are N-acyl derivatives of the compound known as tetracaine.

An injectable composition of higher residual effect with reduced detrimental effects such as pain at injection site, swelling, tissue irritancy or necrosis and containing as active principle a tetracycline compound, either as the free base or a salt thereof with a physiologically acceptable acid, complexed with a substantially equimolar amount of a magnesium compound, is solubilized in a water miscible solvent system comprising, either (i) a) glycerol formal in an amount of from about 10 to 50% ...

The invention concerns a series of novel bis-urea derivatives, nonpeptides, which show good binding affinity for the CCK-B receptor. The compounds, compositions containing them, methods of preparation, and utilities including anxiety, gastric acid secretion inhibition, and psychoses are included.

A low odor, aqueous, quick acting cold temperature disinfectant solution primarily useful for medical instruments to disinfect within a half hour or less. The composition comprises a reacting or synergistic combination of hydrogen peroxide and from about 1% to 30% by weight of a carboxylic acid/carboxylate salt buffered solution.

An electrically controlled hydraulic actuated fuel injector wherein the amount of return fuel flow is substantially reduced without adversely affecting injection valve operation. An improved control valve armature valve disk of faster acting construction is also included. In one embodiment, dual pressurizing passages of differing diameters provide lower total fuel flow to a control chamber than the outflow through a depressurizing passage controlled by a control valve. Upon full opening of the i...

A hay baler having two bale chambers arranged end to end in a straight line and a single plunger reciprocating in both chambers. Drive for the plunger may be by cranks and connecting rods on each side of the plunger or by a planetary gear train driving a crankshaft.

Two single pole flexible blade snap switches are mounted together to have both actuated essentially simultaneously by the same position of a common element by mechanically connecting together but electrically insulating the free ends of the two blades.

Two waveguide structures are coupled by connector members that are slideably engaged to one waveguide and adaptable to fixed engagement with the other. Tapered threaded locking pins are threaded through a portion or extension of the waveguide structure that accommodates the slideable end of the connector members. The tapered end of each locking pin engages a tapered recess in a connector member. Longitudinal translation and fixed coupling of the two waveguide structures is achieved by screwing t...

Fertilizer compositions which are slowly and uniformly leached and made available to the plant over a relatively long period of time resulting in more efficient utilization of the fertilizer by the plant are provided by bonding fertilizer material with the hemihydrate of calcium sulfate.