A stowable marine propulsion unit having a propeller shaft with a propeller at one end, a thrust bearing to resist axial movement of the propeller shaft and an axial piston hydrostatic motor positioned between the thrust bearing and the propeller.

A driving belt has a textile supporting element composed of multi-functional threads or yarns which contain plastic fibers of high breaking strength and heat-resistant natural fibers. The driving belt also contains an electrically conductive element. The supporting element is connected to a non-crosslinked plastic covering to form an asymmetric structure. The textile supporting element can be impregnated on the side facing away from the plastic covering. The electrically conductive element is ei...

A driving apparatus includes a scanning driver circuit connected to scanning electrodes and a signal driver circuit connected to signal electrodes. The scanning driver circuit includes: (1) a drive signal voltage generating unit which includes a first signal voltage generating unit for generating a scanning selection signal voltage supplied to a first bus, and a second signal voltage generating unit for generating a scanning nonselection signal voltage supplied to a second bus, (2) a switching c...

A single transistor type driving circuit for a piezoelectric vibrator. The driving circuit includes a transformer having a primary winding and a secondary winding, a single switching transistor connected in series with the primary winding, the piezoelectric vibrator being connected with the secondary winding, a transistor driving circuit for applying driving current to the switching transistor so that the switching transistor is alternately turned on and off to thereby drive the vibrator at or i...

Disclosed is a driving apparatus comprising: a. means for driving matrix electrodes having scanning and information electrodes; b. means for counting the number of scanning electrodes to which a scanning selection signal is applied; and c. means for designating a width of a scanning selection period for every predetermined count value.

A driving device comprises a source of hydraulic fluid under pressure, a working arrangement (6) having a working chamber (7) intended for receiving hydraulic fluid and a working member (8) adapted to be put in motion on respective fluid supply to and fluid evacuation from the working chamber. Conduits (20, 29, 30) are provided for respective supply to and evacuation from the working chamber (7) of hydraulic fluid. A valve (16) is adapted to, in a first state, direct fluid to the working chamber...

A driving belt formed from a textile belt with plastic catch elements injection molded onto the belt. The catch elements have equal spacing from each other in the longitudinal direction of the belt. The belt has several parallel strips, which include non-reinforced strips and reinforced strips. The plastic completely penetrates the textile belt across the non-reinforced strips.

When an ultrasonic motor and a vibration detecting element are provided, in order to make it possible to accurately effect the detection by the vibration detecting element, the resonance frequency band and/or the drive control range of the ultrasonic motor and the resonance frequency band or the half value width band of the resonance of the vibration detecting element are set so as to be discrete bands.

A paddle wheel, bulk-goods pick-up and moving device is disclosed, which picks up bulk goods from a storage container and deposits the same into the paddle wheel's interior. The device is provided with a motor-driven driving gear provided with a coaxially extending drive shaft immediately adjacent the driving gear. The shaft is provided with external serrations, and the interior central bore of the paddle wheel is provided with complementary internal serrations which matingly engage with the ser...

In a driving mechanism for driving an oscillating polarizer in a polarimeter, the polarizer is driven by a stepper motor which is controlled by a computer to make a reciprocating movement. A reference position sensor is connected to the oscillating polarizer, to provide a reference signal when the oscillating polarizer is in a determined position. A zero position of the reference position sensor is obtained by spacing the reference position sensor a predetermined number of steps of the stepper m...