Abstract: An apparatus for fishing includes a fishing rod and a separate base unit onto which the rod can be mounted and readily removed. The rod is generally conventional and includes a reel mounted on a rod body for winding in the fishing line with a spool and a hand cranked rotor for winding the line around the spool. The base unit includes a cylindrical holding sleeve for mounting the rod body and a battery driven electric motor for driving the spool independently of the rotor by a drive shaft extending parallel to the sleeve. An adjustable pressure switch for activating the motor is connected between the holder and the base unit so that pulling force on the line pivots the holder around a pivot mount.

Abstract: An apparatus for fishing includes a fishing rod and a separate base unit onto which the rod can be mounted and readily removed. The rod is generally conventional and includes a reel mounted on a rod body for winding in the fishing line with a spool and a hand cranked rotor for winding the line around the spool. The base unit includes a cylindrical holding sleeve for mounting the rod body and a battery driven electric motor for driving the spool independently of the rotor by a drive shaft extending parallel to the sleeve. An adjustable pressure switch for activating the motor is connected between the holder and the base unit so that pulling force on the line pivots the holder around a pivot mount.

Abstract: A method for identifying a warhead in an aircraft launch tube includes providing a pattern of grooves on the surface of a warhead, with the pattern of grooves being associated with an identification code identifying the warhead or a characteristic of it, providing the warhead in an aircraft launch tube, providing a piezoelectric transducer on the launch tube, emitting an ultrasonic wave from the piezoelectric transducer to the pattern of grooves, where the wave encounters the pattern of grooves at an angle of less than 90° so that waves striking the interior of a groove are reflected back to the transducer as echo waves, while waves not striking the interior of a groove are reflected away from the transducer, and reading the pattern of returning echo waves to determine the identification code indicated by the pattern of grooves on the warhead.

Abstract: A method and an apparatus for ultrasound imaging at different frequencies using a single ultrasound transducer. The transducer has a single characteristic frequency. The method and apparatus involve driving the transducer with pulses having different rise times through different coupling circuits having different impedance characteristics. Between pulses, the same transducer and coupling circuit which were used during the pulse transmission "listen" for echoes from the structure being ultrasonically investigated. It is believed that the combination of different pulses having different rise times and different coupling circuits having different characteristics enhances different ones of the frequencies contained in the Fourier spectrum of the driving pulse and suppresses others. This enables the operator to investigate a structure ultrasonically with a single transducer at different frequencies which illuminate different characteristics of the structure to greatest advantage.