Abstract: An improved ultrasonic mechanical sector scanning transducer assembly is disclosed. An ultrasonic transducer is disposed for movement within a generally tubular housing. A drive element extends longitudinally within the housing and is coupled for transmitting motion to the transducer. Power means produces oscillatory rotative movement of the drive element and transducer. A diaphragm seal, comprising a resilient tubular membrane, provides a liquid tight seal between longitudinally displaced interior sections of the housing. The tubular membrane has one relatively narrow end and flares along its length to a wider opposite end. The narrow end is bonded about the drive element. The wider end is affixed about the periphery of the housing. A coaxial cable is coupled to the transducer and extends to the exterior of the housing. The cable is wrapped within a spiral groove extending about the outer surface of a spool or reel mounted for movement in unison with the transducer.

Abstract: An improved ultrasonic mechanical sector scanning transducer assembly is disclosed. An ultrasonic transducer is disposed for movement within a generally tubular housing. A drive element extends longitudinally within the housing and is coupled for transmitting motion to the transducer. Power drive apparatus produces oscillatory rotative movement of the drive element and transducer. A diaphragm seal, comprising a resilient tubular membrane, provides a liquid tight seal between longitudinally displaced interior sections of the housing. The tubular membrane has one relatively narrow end and flares along its length to a wider opposite end. The narrow end is bonded about the drive element. The wider end is affixed about the periphery of the housing. A coaxial cable is coupled to the transducer and extends to the exterior of the housing. The cable is wrapped within a spiral groove extending about the outer surface of a spool or reel mounted for movement in unison with the transducer.

Abstract: Disclosed is a bumper beam formed of a plurality of elongate sections. The sections are formed of composite material comprising both longitudinal fibers and random fibers embedded within a resin matrix. The longitudinal fibers extend continuously between the opposing ends of the bumper beam with their longitudinal axes being substantially parallel to the longitudinal axis of the beam. The random fibers have their longitudinal axes randomly oriented with respect to the longitudinal axis of the beam. The longitudinal fibers comprise 70-85% of the total weight of the longitudinal and random fibers. The cross-sectional shapes of the sections are such that when subjected to the stresses induced by a collision, the outermost sections will tend to deflect in the lateral direction.

Abstract: A lightweight shock absorbing device which could be used on automotive vehicles includes an elongated main body portion and side return portions connectable to opposite ends of the main body for extension a short distance along the side of the vehicle. The main body portion includes longitudinally extending corrugations which open both forwardly and rearwardly, forming locking channels into which accessories, stiffeners and mounting brackets can be selectively connected to the body. Reinforcement stiffeners can be attached to the body at any desired location along the length of the body to establish desired shock absorbing characteristics dependent upon the weight and size of the vehicle on which the bumper is mounted.

Abstract: Piperazine derivatives having the formula (I) ##STR1## wherein R.sub.1 is C.sub.1-5 alkyl group which can have a phenyl, trimethoxyphenyl, phenoxy, methoxy-cyclohexyl or heptamethyleneimino substituent on the terminal carbon atom, allyl, phenyl which can have one or more halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, trihalomethyl or allyl substituents, or C.sub.2-5 alkoxycarbonyl;R.sub.2 is hydrogen or C.sub.1-4 alkyl; andR.sub.3 is furyl or a C.sub.5-6 cycloalkyl having a C.sub.1-4 alkoxy substituent, and acid addition salts or quaternary salts thereof with anti-arrhythmic and coronary dilatating pharmaceutical effects.

Abstract: 3-[4-(2'-Pyridyl)-piperazin-1-yl]-1-(3,4,5-trimethoxybenzoyloxy)-propane or a pharmaceutically acceptable acid-addition salt thereof in a composition with anti-arrhythmic activity.

Abstract: The invention relates to novel piperazine derivatives having the formula (I), ##STR1## wherein R.sub.1 represents a C.sub.1-5 alkyl group having optionally a phenyl, trimethoxyphenyl, phenoxy, methoxy-cyclohexyl or heptamethyleneimino substituent on the terminal carbon atom, allyl group, a phenyl group having optionally one or more halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, trihalomethyl or allyl substituent(s), or a C.sub.2-5 alkoxycarbonyl group,R.sub.2 represents hydrogen or a C.sub.1-4 alkyl group, andR.sub.3 represents furyl group, 9-xanthenyl group or a C.sub.5-6 cycloalkyl group having a C.sub.1-4 alkoxy substituent,Or acid addition salts or quaternary salts thereof.The invention also relates to pharmaceutical compositions containing the above compounds, furthermore to a process for the preparation of the novel compounds and pharmaceutical compositions.The novel compounds according to the invention possess anti-arrhythmic and coronary dilatating effects.