Abstract: An improvement over the cementitious composite material described in U.S. Pat. No. 4,482,385 consists in replacing the stainless steel particles with graded silicon carbide particles. The resulting material has a lower coefficient of thermal expansion, a greater thermal conductivity and an increased surface abrasion resistance as compared to the material described in the patent and is a lighter weight material. These properties enhance its applicability to certain uses.

Abstract: A monitor assembly is provided herein for monitoring the effectiveness of anodic protection of a carbon steel vessel containing a corrosive liquor, e.g. pulp digesters. The monitor has two identical carbon steel coupons mounted on a mount rod, one coupon being in electrical connection with the anodically protected vessel, the other being out of electrical connection with such vessel. A reference electrode is mounted on the same mount rod in such a way that the reference electrode, but not the mount rod, is wetted by the liquid contents of the carbon steel vessel. In this novel combination of elements, the mount rod, the metal components of a sealing gland and a metal spacer disc are made of any metal with sufficient mechanical and chemical stability to withstand the corrosive environment of the liquid contents of the carbon steel vessel and the mechanical stress.

Abstract: A level constructed of clear acrylic plastic including a piece of colored acrylic plastic which serves as a light collector and a continuous passageway in the clear acrylic which reflects the light collected by the piece of colored plastic. By partially filling the passageway with liquid, a line of reflected light appears on the wall of the passageway above the interface between the liquid surface in the passageway and the unfilled portion of the passageway, whereby the level is easier to read than ordinary bubble type levels.

Abstract: The strength of the stainless steel containing cementitious composite material of U.S. Pat. No. 4,482,385 is improved by curing it according to a specific schedule which includes the steps of curing in a mold, steam curing after demolding, slow drying and dry thermal curing.

Abstract: A reinforcing material based on glass fibers and which is resistant to attack by the free alkali present in the cementitious matrix which is to be reinforced by said material is produced from ordinary glass scrim by coating said scrim with three successive rubber latex coatings by dipping the scrim into said latexes, and drying the coatings between dips.

Abstract: A mechanism for converting a weight into a frequency by means of a tuning fork vibrator having a pair of elongated plate-like vibrating strips extending in parallel with each other, a lever unit with a power pivot, fulcrum pivot and a load pivot, and a base portion, both ends of the tuning fork vibrator being coupled with the power pivot of the lever unit and the base portion, respectively by means of thin plate-like members. The weight to be converted is applied to the load pivot of the lever unit and is transferred to the tuning fork vibrator by means of the lever unit. All the parts of the mechanism are formed integrally from a single plate.

Abstract: A piece of furniture which is convertible to a bed, a sofa or couch, a recliner, a sick bed or a day bed for convalescents and which utilizes the geometry of its component parts to facilitate conversion from one mode, e.g., sofa, to another mode, e.g., bed.

Abstract: A rectangular switch body has a plurality of terminals of round flexible wire rods and is provided at its four outer side surfaces with engagement members. Various kinds of cross-sectionally C-shaped brackets of a resilient metal plate provided with engagement members are prepared. An insert mount having a mount frame with at least three side walls engageable with at least three side surfaces of the switch body and engagement members is prepared. By using one of the brackets or the insert mount, the switch body is mounted on a printing wiring board in a desired direction or on a panel.

Abstract: A spring type hand grip exerciser having a body with a pivoted lever that operates against a spring resistance force when the lever is moved toward the body of the exerciser. The hand grip exerciser contains a counter which counts the number of times a user grips and releases the lever and body. The hand grip exciser is free standing on a level surface.

Abstract: A cementitious composite material exhibiting an exceptional combination of high tensile, flexural and compressive strengths as compared with generally accepted values for Class H cements is produced from a mixture having a low pH and containing a tobermorite-like gel.

Abstract: A glass-fiber reinforced light-weight cementitious product having a density of less than 85 pounds per cubic foot, a high tensile strength and a high compressive strength, when cured, and hence, suitable for structural articles in which such properties are required. The product is formulated from a mixture in which the aggregate comprises substantially equal parts by weight of fly ash cenospheres and silica fume.

Abstract: A pneumatic material transference apparatus consisting of a closed hopper having a material inlet pipe at the top, a material outlet pipe at the bottom ending in a discharge chamber and a pneumatic operating system consisting of a valve chamber operatively connected to a control pipe, the upper end of which opens into the top of the hopper, the valve chamber having two valve seats, a valve disc associated with each valve seat, the valve discs being connected to each other by a valve stem such that when one disc is closed, the other one is open, a pressurized air supply chamber in cooperation with one of the valve discs and a vacuum chamber in cooperation with the other of the valve discs, an induction throat between the pressurized air supply and the discharge chamber, and a nozzle within the induction throat having an opening within the vacuum chamber.

Abstract: A lightweight cement product formed from a mixture comprising cement, condensed silica fume, flyash, cenospheres, finely divided crystalline silica particles, epoxy emulsion, curing agent, accelerator and water which hardens in less than one hour to produce articles with a density less than 90 pounds per cubic foot and a tensile strength of at least 600 psi and a compressive strength of at least 6000 psi after curing for 1 day at 60.degree. C.

Abstract: A working tool having a linear working edge is secured to a tool holding arm which is rotatably arranged about a focus shaft extending in parallel with a Z axis and is slidable linearly in parallel with an XY plane. A workpiece is secured to a workpiece mounting member in such a manner that its center axis extends in an X' direction which is inclined by an angle (.pi./2-.theta.) with respect to an X axis. A longitudinal direction of the working edge is inclined by the angle .theta. with respect to a line which is obtained by projecting a sliding direction of the tool holding arm. When the working tool and the workpiece are moved relative to each other, the workpiece is cut into a quadric surface in accordance with a quadric surface formed by the working edge as an envelope of tangents.

Abstract: A tubage for use in an intubation is provided. The tubage comprises a tubular body having a first conduit and a second conduit which are formed therein to extend in a longitudinal direction, a flange portion formed to extend substantially perpendicular to the longitudinal direction and a side hole which is formed in the first conduit at a predetermined distance from the flange portion.

Abstract: A resilient contact member to be installed in a jack for use in conjunction with a pin-plug comprising a fixed leg portion to be fixed to an inner wall of a housing of the jack, a movable leg portion having a portion which is to be engaged with a pin portion of the pin-plug inserted into the jack to make an electrical connection between the jack and pin-plug, a substantially U-shaped portion for connecting the fixed and movable leg portions to each other at their one ends, said fixed and movable leg portions extending in parallel with each other. The fixed and movable leg portions and U-shaped portion are all formed integrally with each other by punching a thin metal plate. The contact member further comprises a reinforcing member which engaging with the movable leg portion. The movable leg portion can be moved toward the fixed leg portion in a resilient manner against the resilient force of the movable leg portion and the reinforcing member.

Abstract: An axial piston machine having double acting piston assemblies incorporating swivel joints from which connecting rods extend to drive points on the radial arms of a wobble plate, the central pivot of which is established by a universal joint support. The wobble plate is connected by a crankpin and a crankarm to a crankshaft establishing a precessing driving plane at a tilt angle to the crankshaft axis of preferably less than 18.degree.. A valve rotatable about the crankshaft axis controls the supply and exhaust of fluid to the piston assemblies.

Abstract: A water line freeze protection system consisting of first and second branch pipes extending from a water service pipe, a water holding tank, a metering orifice between the first branch pipe and the holding tank, a pump and a check valve between the holding tank and the second branch pipe, the check valve permitting flow of water only in the direction from the pump to the second branch pipe, a float and switch secured to the holding tank to activate the pump at an upper water level and deactivate the pump at a lower water level, and an overflow pipe from the holding tank to pass water from the holding tank into a drain when the pump is none operational.

Abstract: A cementitious composite material exhibiting a unique combination of high strength, vacuum integrity and thermal properties. Objects made of the material may be cast from mixtures in which a major constituent is a filler which consists of stainless steel particles of particular shapes and sizes. The cast objects are characterized by the absence of a continuous network of interconnected pores and by the presence of a tobermorite phase in the material.