Abstract: A monoport airgun for seismic exploration has a single discharge port extending continuously for 360.degree. around its longitudinal axis. This airgun has a first housing providing a firing chamber containing pressurized gaseous fluid (gas) and a second housing providing an operating chamber. The first and second housings are positioned in alignment along the longitudinal axis. They are spaced apart along this axis for defining the discharge port between them extending continuously around the axis. The two housings of the monoport airgun are interconnected solely by a guide member concentric with the axis. A shuttle encircling the guide member is movable therealong between closed and open positions. In closed position, the shuttle closes the firing chamber for retaining pressurized gas therein. In open position, the shuttle opens the firing chamber to the discharge port for allowing pressurized gas to blast from the firing chamber through the discharge port.

Abstract: A motor driven by a fluid motion, comprising a rotor with a vane whose surface varies according to the vane position relatively to the fluid flow direction. To create a thrust on the vane when the fluid moves quasi-parallel to the vane longitudinal axis, at least one side-panel is provided on the vane, generally perpendicular to the longitudinal axis thereof.

Abstract: An ultrasonic atomizer for liquids comprises a piezoelectric transducer (16) mechanically coupled to an amplitude transformer (20), an atomizing disk (21) mounted to the free end of the amplitude transformer (20), a housing (22) enclosing at least the amplitude transformer (20) and a cap (30) supporting a sieve-like diaphragm (31). The cap (30) is so mounted to the housing (22) that the diaphragm (31) rests on the atomizing disk (21). The cap (30) consists of two mutually concentric cap parts (32, 33) of which one (32) supports the diaphragm (31) and the second (33) serves to mount the entire cap (30) on the housing (22). A spring (36) is so mounted between the two cap parts (32, 33) that the sieve-like diaphragm (31) is held elastically against the atomizing disk (21) and that the opposing force from the spring (36) thereby is transmitted into the second cap part (33) fixed in the housing.

Abstract: A compound turret for machine tools such as latches or the like having rotating and non-rotating tooling turrets mounted on a single housing. The compound turret includes a primary drive and a secondary drive. The primary drive includes a compound turret indexing unit operable to index the rotating and non-rotating tooling turrets into the turret operating and turret storage positions. The compound turret indexing unit consists of a harmonic drive that enables the operator to incrementally vary the turret operating position. The harmonic drive achieves high reduction ratios in a single stage thus eliminating the cumbersome gear systems usually implemented to achieve the reduction ratios required. The primary drive further includes a non-rotating tool indexing unit. The non-rotating tool indexing unit is operable to index the non-rotating tooling. The non-rotating tool indexing unit consists of a harmonic drive unit similar to the compound turret indexing unit.