Abstract: An apparatus that acts as a shield for radiopharmaceuticals and protects individuals from radioactivity includes a first body with a first hollow core, a second body with a second hollow core and a third body with a third hollow core. The first hollow core, second hollow core and third hollow core collectively house a hypodermic syringe. A first connection means releasably communicates the first body with the second body. A second connection means releasably communicates the first body with the third body. The third body comprises means for lowering the hypodermic syringe into a well counter to measure radioactivity of the radiopharmaceutical it contains.

Abstract: A circuit for supplying signals to a quadrifilar antenna that has an input port for receiving a first signal, a first transmission line connected at one end to the input port, and a first connection point. The first connection point is connected to another end of the first transmission line. The first connection point provides a path to a first antenna port. A second transmission line is connected at one end to the first connection point. A second connection point is connected to another end of the second transmission line. The second connection point provides a path to a second antenna port. A third transmission line is connected at one end to the second connection point. A third connection point is connected to another end of the third transmission line. The third connection point provides a path to a third antenna port. A fourth transmission line is connected at one end to the third connection point. A fourth connection point is connected to another end of the third transmission line.

Abstract: A circuit dividing and/or combining signals that has an input port for receiving a first signal, a first transmission line connected at one end to the input port, and a first connection point. The first connection point is connected to another end of the first transmission line. The first connection point provides a path to a first output port. A plurality of additional transmission lines, connection points and output ports is connected in sequence. Each transmission line is connected at one end to the (N−1)th connection point. A N connection point is connected to another end of the N transmission line. The N connection point provides a path to a N output port. The circuit provides equal amplitude at each of the anntena ports and further provides 90° phase progression between each pair of adjacent output ports.

Abstract: A surface mount crossover component comprising first and second conductor lines electrically isolated from one another by an interposed dielectric layer and capacitively isolated from one another by an interposed ground plane layer. Current flowing through the crossover component via one of the conductor lines encounters no substantial interference from current flowing through the other one of the conductor lines.

Abstract: An axle drive apparatus includes a first rotor assembly with a first output shaft and a second rotor assembly with a second output shaft for providing independent rotation of the first and second output shafts. There also includes a first and second conductive assembly for, respectively, conducting electrical current into a inducing rotation of the first and the second rotor. Finally, an axial housing commonly connects the first and second rotor and the first and second brush card assembly. A method of operating an axle drive apparatus includes supplying current to a first conductive and second conductive assembly, respectively, to conduct the current into and inducing rotation of a first and second rotor assembly. Then the axle drive is operated by engaging a first rotor assembly and a second rotor assembly, respectively, providing independent rotation of a first and a second output shaft.

Abstract: A light emitting diode lighting apparatus that includes: a power supply for providing a fixed direct current; a light emitting diode head for emitting light; and a controller for adjusting the level of said light output on said head and compensating for efficiency altering effects of said light in said power head, whereby said controller receives signals for optical feedback stabilization, temperature compensation, and detection of short term current changes to adjust said light and efficiency.