Abstract: A folding blade propeller for a power vessel wherein the blades are synchronized in their pivotal movement as they pivot from one position to the other by flexible links. The flexible links are connected at one end thereof to the base of one propeller blade and at the opposite to the base of another and act as pulling members. When one blade pivots the flexible link pulls on the base of the other blade to which it is attached to simultaneously pivot that blade. Slack in the links is minimized by having each link in rolling contact with rounded surfaces on the base of the respective propeller blades that are interconnected by that link.

Abstract: A spill free clean out type sink trap includes a cover sealingly and detachably mounted on a container and, in one embodiment, respective individual inlet and outlet conduits are spaced apart laterally from one another. The conduits both project downwardly below the cover into the container in which case, during use, the water level in the container is spaced from the cover. This is an air space of sufficient volume to receive and hold the liquid, normally retained in the conduits, when the seal between the cover and container is broken. In another embodiment, inlet and outlet conduits are concentric and the outlet conduit projects into a further conduit to an extent such that the lower open end thereof is below the normal liquid level. The further conduit projects sufficiently downwardly into the container such that the liquid free volume in the container is greater than the volume of liquid contained in the lower end of the inlet conduit and the further conduit.

Abstract: A vessel for carrying a liquid cargo having a density less than that of the water supporting the vessel is provided with internal transverse and longitudinal bulkheads defining chambers of a total cargo storage space. A horizontal safety bulkhead extends longitudinally and transversely of the vessel and is connected to the sides, the end and intermediate transverse bulkheads and the longitudinal bulkheads, thereby forming the available liquid cargo storage space into a plurality of inner and outer upper and lower cells. This horizontal safety bulkhead is located to be below a predetermined waterline corresponding to a fully loaded condition of the ship, preferably at a distance between 5 ft. and 10 ft. below the waterline. Each of the upper and lower cells is individually vented to atmosphere.

Abstract: A spill free clean out type sink trap includes a cover sealingly and detachably mounted on a container and, in one embodiment, respective individual inlet and outlet conduits are spaced apart laterally from one another. The conduits both project downwardly below the cover into the container in which case, during use, the water level in the container is spaced from the cover. This is an air space of sufficient volume to receive and hold the liquid, normally retained in the conduits, when the seal between the cover and container is broken. In another embodiment, inlet and outlet conduits are concentric and the outlet conduit projects into a further conduit to an extent such that the lower open end thereof is below the normal liquid level. The further conduit projects sufficently downwardly into the container such that the liquid free volume in the container is greater than the volume of liquid contained in the lower end of the inlet conduit and the further conduit.

Abstract: A spill free cleanout type sink trap that includes a cover sealingly and detachably mounted on a container and respective individual inlet and outlet conduits spaced apart laterally from one another. In one embodiment the conduits both project downwardly below the cover into the container in which case, during use, the water level in the container is spaced from the cover. This is an air space and of sufficient volume as to receive and hold the liquid, normally retained in the conduits, when the seal between the cover and container is broken. In another embodiment, the cover is spaced downwardly from the upper edge of the container whereby during use, the water is confined to the bottom portion of the container. The container above the cover has sufficient volume to receive and hold the liquid normally retained in the conduits when the seal between the cover and the container is broken. A spill free trap is also provided using a combination of the two foregoing features, i.e.

Abstract: Clip-on sunglasses for spectacles having frames with a browbar non-circular in cross-section and including a pair of light-weight colored transparent plates interconnected by a bridge plate having a generally C-shaped clip formed integrally therewith. The browbar, preferably square in cross-sectional shape, and the inner surface of the clip are correspondingly shaped. The clip provides means for detachably mounting the sunglasses on the spectacle frames as well as means for pivoting the sunglasses when mounted on the spectacle frames. The square shape of the browbar effectively provides a lock for the pivot in the two different positions.

Abstract: Improvements in a fuel injected, internal combustion engine having a first passage for flow of air into the combustion chamber and exit of exhaust gases from the combustion chamber and a single poppet valve opened and closed in timed relation to rotation of the engine's crank shaft to control flow of gases through such first passage, an inlet air passage and an exhaust gas passage each communicating with the first passage and one another and a diverter valve movable in timed relation to operation of the poppet valve selectively to direct, in one position, air into the combustion chamber through the inlet passage and, in another position, exit of exhaust gases through the outlet passage wherein the improvement comprises a separate small passageway in parallel flow relation with the intake air into the combustion chamber which directs supercharged air into the combustion chamber when the diverter valve is in the exhaust position to purge the engine.

Abstract: A low liquid level sensor in a hot water heating system permitting testing operability thereof in situ without draining down the system. The sensor is located in a cavity that has an opening in the bottom thereof in fluid communication with the liquid in the vessel during normal operation of the system. The end of the opening is at a lower elevation than the sensor and liquid from the vessel is in the cavity during normal operation of the system. When the liquid drops to a predetermined low level the sensor activates the safety cut-off. Valved passed means are provided exteriorly of the vessel so that a gas can be injected into the cavity to pressurize the same and drive the liquid in the cavity through the opening into the vessel simulating a low water level condition. At the simulated low water level condition operability of the sensor can be determined. Means are provided to release the gas from the cavity.

Abstract: A method and apparatus for fusing and shaping the end of a rope, cord or the like made of heat fusible fibers avoiding the enlarged or bulbous end which normally occurs when heated in a conventional manner. The method involves inserting the cut end of a rope into a cavity of a member wherein the cavity tapers inwardly in a direction from an open end thereof to a closed bottom end, heating the member to melt the end of the rope thereby fusing together the strands and cooling the heated end of the rope to set the fused ends and shape the same to the internal shape of the cavity. The apparatus is a thin-walled, metallic member conically shaped and located at the end of a handle. A flared sleeve is also provided in which the end of the rope to be fused is inserted to compress the strands together before being heated. The conical member maybe heated by a butane torch or the like or alternatively, an electric resistance heating element maybe incorporated in a stem projecting from the handle.

Abstract: An automobile spark plug having fluid flow passages therein for injecting a fuel mixture into the combustion chamber of an internal combustion engine. The spark plug has a central electrode with an ignitor tip at one end thereof and surrounded by concentric fluid flow passages. Liquid atomizing orifice means interconnect the passages and the mixture therefrom flows into a passage surrounding the ignitor tip of the electrode. A gas and liquid mixture (preferably hydrogen with water) are proportioned in response to the quantity of one of the two dispensed.

Abstract: A low liquid level sensor in a hot water heating system permitting testing operability thereof in situ without draining down the system. The sensor is located in a cavity that has an opening in the bottom thereof in fluid communication with the liquid in the vessel during normal operation of the system. The end of the opening is at a lower elevation than the sensor and liquid from the vessel is in the cavity during normal operation of the system. When the liquid drops to a predetermined low level the sensor activates the safety cut-off. Valved passage means are provided exteriorly of the vessel so that a gas can be injected into the cavity to pressurize the same and drive the liquid in the cavity through the opening into the vessel simulating a low water level condition. At the simulated low water level condition operability of the sensor can be determined. Means are provided to release the gas from the cavity.

Abstract: A bar clamp of the type which uses standard pipe for the bar and modified for jacking. The jack includes first and second pipes of suitable length each threaded at at least one end thereof. The first pipe is substantially longer than the second pipe and has a first jaw member slidable therealong for quick positioning and lockable at any position. A mounting bracket having a threaded bore extending from one face thereof to and through an opposite face interconnects the first and second pipes. A second jaw member is slidable along the second pipe and movable by rotating a threaded rod that extends through an additional threaded bore in the bracket. A handle is swingably connected to one end of the threaded rod for use in rotating the same.

Abstract: Spectacle frames having a groove in the nose pads remote from the nose contacting surface portion thereof and grooves in the frame adjacent respective ones of the hinge connections of the legs to the frame for receiving respective ones of a pair of resiliently flexible, colored transparent plates behind the normal lenses of the spectacles.

Abstract: A bar type jack having first and second pipes of suitable length each threaded at at least one end thereof. The first pipe is substantially longer than the second pipe and has a first jaw member slidable therealong for quick positioning and lockable at any position. A mounting bracket having a threaded bore extending from one face thereof to and through an opposite face interconnects the first and second pipes. A second jaw member is slidable along the second pipe and movable by rotating a threaded rod that extends through an additional threaded bore in the bracket. A handle is swingably connected to one end of the threaded rod for use in rotating the rod. Removable jaw attachments are provided and so shaped as to permit jacking one member relative to another when the members to be jacked apart are located closely adjacent one another.