A general wing form to be used as a stabilizer for watercraft or as a double hulled craft in itself. It is comprised of two buoyant foil or hull elements and a connecting beam, and characterized by its integral structure, its anhedral configuration and its particular use of static and dynamic left forces for stability.

A machine capable of performing one or another of a variety of conditioning operations on a surface by use of vibration energy. A vertically extending base holding plate has a cantilever beam extending from it, with a captive stationary end fastened by a resilient mount to the plate. A source of vibration energy is mounted on the cantilever beam intermediate to its ends. A main resonant plate substantially parallel to the cantilever beam has a work shoe removably attached to it through a resilie...

A method and apparatus for locating the center of a non-circular, such as a rectangular, face of a workpiece to permit the boring or drilling of an opening in the workpiece at the center of said face. The workpiece is adapted to be mounted in a rotatable chuck and locating blocks are firmly held, as by permanent magnets, against diametrically opposite surfaces of the workpiece adjacent said face. The locating blocks have planar reference surfaces which project beyond the said face of the workpie...

A surface aerator equipped with a central vertical shaft which can be coupled to a drive means, substantially vertical blades being mounted on the lower end of said shaft. According to the invention an upwardly expanding, smooth cone is fitted underneath, and coaxially with, the shaft, the greatest radius of which cone is appreciably greater than the radius of the shaft, but appreciably smaller than the radius of the aerator at the outer edges of the blades, while the upper edge of this cone is ...

A surface waterstop is in the form of a strip of rubber or plastics material. At least one keying formation, preferably a T-shaped formation, is provided on each side of a center line of the strip. A longitudinally-extending central section may be provided for receiving and locating stop-end shuttering. Along at least one lateral edge, and preferably along both lateral edges, the strip is adapted, for example by the provision of holes, slots or the like, to receive fixing pins or clips which, in...

A surface thermocouple assembly including a metal sheath having thermocouple conductors extending therethrough in spaced relation from each other and from the sheath by electrical insulating material, an opening in the sheath wall at the hot junction end and through which the conductors are extended, a ceramic plug receiving the conductors and mounted in the opening, a fusion weld of the conductors outside the plug, and a V-shaped pad with a knife-shaped edge integrally formed at the junction en...

A silicone rubber surface for fixing resinous powder images to a substrate at elevated temperatures in a xerographic reproducing apparatus is disclosed. The silicone rubber surface prevents offset of the image by supplying inherently a release material to the surface. Dispersed in the silicone rubber is a catalytic agent which in the presence of water or moisture, promotes the degradation of the silicone rubber over a period of time at elevated temperatures. The release material is the degradati...

A surface bolt adapted to be mounted on an inner or outer surface of a closure member, such as a door or window, the bolt being slidable in guides between positions into and out of engagement with a keeper. One of the guides is provided with means to receive the bow of a padlock in two positions, in one position to prevent unlocking of the bolt or, in the other position to prevent locking of the bolt. The bolt may have a recess extending across its outer surface, positioned and dimensioned to be...

Treatment of metals, and other surfaces, with dilute colloidal slightly acidic dispersion of silica. The metals become resistant to chemical attack.

A surface sensor utilizing a light source for projecting light onto a travelling surface and thereby illuminate a limited area of said surface is combined with at least two angularly spaced sensors and arranged to detect light reflected. Signals are generated in accordance with the amount of light received and these signals are processed to obtain at least one of (a) an indication of topographical surface characteristics of the web surface while suppressing the effects of changes in reflectivity...