Abstract: An apparatus and method for accurately determining the quantity of powder flowing in a spraying device includes a power density measuring element for measuring the powder density of the powder/gas mixture flowing in the spraying device and a device for measuring the flow rate of the pure gas prior to its mixing with the powder. Signals representative of the powder density and gas flow rate are generated and transmitted to an electronic evaluation device which calculates from these measurements the absolute flow rate of the powder per unit time.

Abstract: Injection of gas into a bed of solids contained in a hopper is compartmentalized to allow independent control of gas to be vented upward and gas and solids to be discharged.

Abstract: An oarlock comprising a pin adapted to be mounted for pivotal movement about a generally vertical axis, the pin including an upwardly facing surface and an upper portion located above the surface, and an oar supporting member mounted on the upper portion of the pin for pivotal movement relative thereto about a generally horizontal axis the oar supporting member including a lower end surface located above the upwardly facing surface of the pin, the lower end surface including a portion which is spaced from the upwardly facing surface so as to permit pivotal movement of the oar supporting member about the horizontal axis, and a portion which engages the upwardly facing surface in response to pivotal movement of the oar supporting member so as to limit pivotal movement of the oar supporting member about the horizontal axis.

Abstract: Apparatus for conveying material between two terminals using a reversible blower system that conveys a carrier member through a tube by suction from one terminal to an intermediate location and by pneumatic pressure from the intermediate location to the other terminal, and vice versa. The carrier member is gradually retarded and stopped at each terminal by a yieldable plate inclined into the path of the carrier member with a yieldable latching element urging the plate inwardly and also serving to latch the carrier member in its ultimate terminal position. The tube has separately manipulatable, open-ended, end portions in which the carrier member is retained for manipulation into position for receiving or discharging its contents. Covers on the carrier member are automatically removed and replaced at each terminal by radially movable latching elements on the cover that are manipulated by an axially movable central unlatching element.

Abstract: A boarding sensor and control circuit for small watercraft providing a reflection sensor which outputs a non-boarding signal to the control circuit when the driver is not within the reflection sensor's detection area and, in one embodiment, directs the navigation of the watercraft to return to the driver when overboard.

Abstract: There is disclosed a catamaran either of the inboard or of the outboard type comprising a tunnel having a decreasing height from the bow to the stern thereof and so shaped as to provide an optimal distribution of the underlaying air pressure and in which, under the two flexible material tubular elements supporting the overlaying structure there are affixed tight rigid hulls which can consist of two or more parts in order to better fit the configurations of the waves by exploiting the resiliency of the tubular elements. The rear part of each hull is so designed as to form a small tunnel for preventing water from laterally exiting which is very important at the start and gliding of the boat. Thus the boat will be very soft, safe with high speed and reduced consume characteristics.

Abstract: Pressure propulsion system and process for pneumatic pipeline transport using containers which, in aim to eliminate flap-valves or the like, is using only an open ended at both ends continuous tubular structure/pipeline inside of which the wheeled containers are pressed/introduced bumper to bumper by a chain or other pushing mechanism and also air is injected via only one orifice or manifold into the said continuous pipeline at a certain distance downstream from the said chain or pushing mechanism making possible the pneumatic propulsion of the said containers by the compressed air along the continuous tubular structure/pipeline.

Abstract: A surfboard is provided with fins, at least one of which is canted at an angle to the longitudinal axis and also tilted relative to the surface of the board, and reinforcing fibers are applied to extend continuously from along the fin to along the board, and adhered to each.

Abstract: A marker assembly for a boat trailer according to the invention includes a marker pole, a reservoir or tank disposed at one end of the marker pole, and a bracket assembly for rotatably mounting the marker to a conventional boat trailer. The reservoir fills with water and is configured so that the marker pole is self-righting. The marker assembly according to the invention eliminates the need for manually righting the marker prior to backing the trailer into the water near a dock or similar structure.

Abstract: A marine propulsion device (11) is provided wherein a pair of generally telescoped bellows (31; 38,46) surround the universal joint (18) and provide an exhaust passage (44) therebetween which communicates between the inboard engine (9) and the stern drive unit (2). In the embodiment disclosed herein, the inner bellows (31) rotates with the universal joint while the outer bellows (38,46) is stationary. The bellows are preferably of helical or spiral configuration and the rotating inner bellows forms an exhaust pump. In one embodiment, (FIGS. 1-3), the bellows (31,38) are concentrically disposed, while in another embodiment (FIGS. 4-5) the bellows (31,46) are eccentrically mounted.

Abstract: The fiber processing plant has a pneumatic flock feed system which is operated in dependence on an operating parameter which, in turn, is dependent upon the number of fiber processing machines which are operating at a given time. In one embodiment, a meter is disposed in a feed duct of the flock feed system between a fan and a first of the fiber processing machines in order to sense the static pressure therein. The meter is used to sense a difference in pressure caused by one or more fiber processing machines becoming inoperative so as to cause a switching on or off of the fiber supply to the feed duct.

Abstract: A number of embodiments of controls for marine propulsion units having two engines and propulsion systems with abnormal running control devices operated in response to abnormal engine conditions. The systems are interrelated so that when the control of the abnormally running engine is activated, the control of the normally running engine is also activated.

Abstract: An improved system for directing a flow of container bodies to a plurality of base cupping machines from a plurality of blow molding machines comprising: (1) a plurality of primary conveyors, each primary conveyor adapted to feed container bodies from a blow molding machine toward a base cupping machine; (2) a plurality of cross-over conveyors for feeding container bodies from one of the primary conveyors to another of the primary conveyor; (3) diverter blades and converger blades positioned at the junction of primary and cross-over conveyors to direct container bodies between various primary conveyors; (4) a sensor upstream and two sensors downstream of each diverter blade and a sensor downstream and two sensors upstream of each converger blade to detect the flow of container bodies therepast; and (5) programmable control means responsive to the sensors to switch the blades as required for proper feeding of container bodies.

Abstract: A self-propelled manned submersible vehicle of the type comprising a pressure-resistant capsule (1) serving as a cabin, ballast tanks (3, 8), releasable ballast (7), propulsion units (4) having propellers driven by electric motors, and storage batteries (42), the pressure-resistant capsule (1) comprises a peripheral window constituted by a vertical cylindrical sleeve (19) which is entirely transparent, the sleeve is of sufficient diameter to house a plurality of people sitting side-by-side, and extends upwardly from a hemispherical bottom (14) and downwardly from a spherical cap (16) which is extended by a cylindrical conning tower (21) which is closed by a hatch (22).

Abstract: A fire sprinkler head including a tubular body defining an inlet adapted for connection to a supply of pressurized fire extinguishing fluid, an outlet adapted for placement in a fire protected zone, and a cylindrical inner wall extending between the inlet and outlet and defining an annular recess; and a valve comprising a piston and a cup-shaped gasket retained by and mounted for movement within the body from a closed position to an open position and providing in the closed position a fluid tight seal between the inlet and the outlet and allowing in the open position fluid flow therebetween; the cup-shaped gasket comprising a bottom portion for receiving a force for inducing the gasket movement and produced by pressurized fluid at the inlet, an annular skirt portion having one end joined to the bottom portion and an opposite end retained by the piston, and an annular lip portion extending outwardly from the skirt portion and received by the annular recess so as to form a fluid tight seal therewith.

Abstract: A non-inflatable buoyancy aid is described comprising an annular structure of closed cell plastic foam which is held in position about a wearer's arms and legs through positive displacement and material friction. The buoyancy aid maintains the wearer in either a horizontal or vertical position at water level, depending upon the positioning of the aid about the limbs.

Abstract: A boat or ship's propeller system utilizes a rotary propeller comprised of a plurality of short blade elements arranged annularly and supported from a central propeller shaft by spokes, there being an annular "funnel" with the large end forward which scoops water and delivers it under some pressure to the rotating annular ring of blade elements.

Abstract: An apparatus for pneumatically conveying bulk material in particular bulk material which is difficult to handle includes a conveyor line having a plurality of conveyor line sections for transporting the bulk material. Each of the conveyor line sections comprises a rigid outer pipe and an elastic inner pipe of an outer diameter which is smaller than the inner diameter of the outer pipe in pressureless state. The connection of adjacent conveyor line sections is attained by a sectional ring which is placed over each axial end of the outer pipe and about which the elastic pipe is folded outwardly, a flange element arranged between the thus shaped axial ends of adjoining conveyor line sections, and external brace elements extending between successive flange elements for bracing the latter so as to connect adjoining conveyor line sections in pressure-sealed manner.

Abstract: The present invention relates to a propulsion device for a boat. A manually powered ship wherein a wing-like fin whose front edge is round and rear edge is sharp is mounted on a shaft provided in a direction parallel to the longitudinal axis of a ship so that the fin is positioned in water below a hull, and the shaft is rotated reciprocally by human power to thereby swing the fin to obtain a propelling force.

Abstract: The present disclosure is directed to a boat having a self-propelled watertight intermediate propulsion section, a watertight bow section connectable to the front of the intermediate section, a stern section connectable to the rear of said bow and intermediate section and the stern section being watertight and buoyant and having steel flat bar framing outlining the perimeter of their transverse extremities welded to the end of each said section which it abuts. Spaced openings are drilled through the flat bar framing in alignment with each section for being selectively joined by bolts and nuts to make up a boat of variable length of bolted abutting sections.