Abstract: This invention relates to system for and method of moving sea water by utilizing tidal flow and ebb. This is achieved by the provision of at least one reservoir in the vicinity of the seashore and at least one tidewater channel connecting the reservoir and the seashore and also the provision of a plurality of floodgates on both reservoir and tidewater channel, the floodgates being adapted to be opened and shut in accordance with the tides of the sea for producing uni-directional current of tidewater through the tidewater channel.

Abstract: A three phase motor acceleration control fires SCR's to supply successively longer current pulses to the motor. The SCR's are controlled by comparing a chopped reference ramp and individual trigger ramps.

Abstract: An auxiliary drive mechanism for use in association with a hydraulically actuated clutch has a gear wheel attached to the driven or output stage of the clutch, and a drive motor driving a pinion meshing with an intermediate gear. The intermediate gear protrudes into the casing which houses the clutch and can selectively engage the gear wheel. The auxiliary drive mechanism finds application where it is at times necessary to provide a drive at a speed lower than normal operating speed, for example to tension the chain of a scraper chain conveyor.

Abstract: A method of steering a mineral mining machine so as to remain in the mineral seam. Natural radiation from rock strata adjacent to the mineral seam is sensed and the machine is steered from the intensity of radiation so that a residual layer of mineral left by the machine which attenuates the radiation has a thickness which is constrained to fall within preselected limits.

Abstract: An apparatus for agitating a slurry to increase its settling rate has at least one fluid inflatable container capable of being inflated and deflated, which is immersed in the slurry, and a control to feed the container with fluid to inflate it, and to interrupt the feed during deflation. The apparatus is simple, effective and permits variation in the agitation.

Abstract: A two cable differential and push-pull system uses both cables simultaneously to operate a controlled device. The two cables are tensioned together or pushed together, or one cable is tensioned while the other is pushed, to operate a single device. Controls which have used separate cables for separate functions use paired cables for the multiple functions, reducing stress on individual cables without increasing the number of cables in the installation. In the illustrated transmission control a differential motion, which includes pushing and pulling forces, is applied through the cables to select a rail. A coincident pushing or pulling force is applied through both cables to shift the rail.

Abstract: The invention relates to a protective device adapted to protect the elbow or knee of a person while engaging in various sports and work. The device is constructed from a resilient energy-absorbing material such as plastic foam and comprises a generally rectangular planar member which can be cut or stamped from a sheet of plastic foam. One side of the planar member comprises a flap member adapted to be flexed together with corner ends of the side, and held together by a flexible cord to form a cradle section adapted to cradle the knee or elbow when worn and secured thereon by a strap member.

Abstract: This invention relates to a protective device adapted to protect the buttocks and hips of a person engaging in the sport of skateboarding. The device is constructed from a resilient material, such as plastic foam which may be covered with a tough, pliable plastic material or the like, and comprises a generally rectangular member having two cutout portions in the upper part and three arm members, through each of which a belt member is passed and the lower portion of the device comprises a pair of double stranded cord members. The device is secured around the waist by the belt member, and the cord members passing around the legs to retain the lower portion of the device on the wearer.

Abstract: A process for the production of vanillin, 3-methoxy-4-hydroxy-benzaldehyde comprising ultrafiltrating a waste sulfite liquor to obtain a concentrated lignin-rich fraction, and oxidizing said fraction by convention procedures. Advantages of the process are increased yields of vanillin and reduction or avoidance of scale formation on production equipment.

Abstract: A circuit arrangement for calibrating a signal by calibrating a storage medium upon which the signal is recorded comprising circuits for producing calibration signals and for interfacing information, calibration and marking signals, a timing and control circuit for controlling periods of calibrating signals recorded on the storage medium and derived by a calibrating circuit.A circuit for providing marking of an event external to the signal is provided.

Abstract: A sheet-like thin flexible heat-emitting surface layer and a coextensive thin flexible serpentine heat-sensing layer are overlayed by thin flexible synthetic plastic sheets which are sealed peripherally. Lead wires from an electrical plug to the heat-emitting layer are interrupted by a controller which is operated by current flowing through the heat sensing layer. Increased heat changes conductivity and current in the heat sensing layer, causing the controller to interrupt or reduce power to the heat-emitting layer.

Abstract: The invention relates to a dome-type structure constructed from four basic triangular structural units. Each basic unit is an isosceles triangle which has predetermined angular edges. The four units are interrelated in their dimensional sizes and angular edges. The several units are installed in four circular tiers whereby abutting adjacent units fit together properly, and whereby upper tiers are canted inwardly to enclose the structure. The structure requires no internal support members. The radius of the circular base is greater than the height of the structure.

Abstract: An upper planter is expanded horizontally and vertically by connecting its large lower open end to an upper open end of a lower planter. A lower open end of a lower planter connects to a combination base and water tray. Screw threads attached to the planters and base cooperate to enable selective connecting and disconnecting. The shape of the continuous cavity formed within separate and connected planters provides room for the natural downward and outward extension of a growing plant root system.

Abstract: An intracervical contraceptive device comprising a tubular member open at each end and adapted to be positioned in the cervical canal and having a valve member incorporated therein which allows body fluids to pass from the uterine cavity into the vagina but not in the reverse direction.

Abstract: Vibration damping annular elastomeric members are mounted between outer spherical bearing members and elements which are attached to inner spherical bearing members to prevent vibrations between the elements and the outer bearing members.The elastomeric members extend outwardly beyond the connection between the inner bearing member and the elements so that the elastomeric members are compressed as the elements are connected to the inner bearing member.

Abstract: The excavating machine has a cutter carrying boom carried by a boom support member which can be swung about an axis extending in the direction of the roadway. The machine includes a cutter unit and a stay unit each of which is releasably anchorable in the roadway and each of which can be advanced relative to the other unit.

Abstract: A universal mounting portable electric drill angle drilling attachment comprising a base, angularly adjustable spring return upright, angle indicia, and drill clamping means.

Abstract: A wiper which clamps on cable conduit and fits over end cup seals has an opening which loosely receives a sliding cable rod to scrape debris from the rod before portions of the rod enter the seal. The wiper is formed from a strip of spring steel pierced centrally to receive the rod. The piercing forms a slight convex shape and leaves a bow which extends toward the end of the rod to further aid the debris-removing function. The strip is bent rearwardly and then inwardly on both sides, and termini of the strip are formed with abutting semi-circular recesses to engage the conduit behind the end cup.

Abstract: A single lever control unit for sequentially operating a transmission and throttle and, selectively, for operating the throttle independently of the transmission. A throttle shaft assembly disengages from a throttle gear by pulling out the shaft while in the neutral position. A double key on the throttle shaft disengages from a keyway in the throttle gear and a spring-loaded pin engages a cavity in the throttle gear to lock both shift and throttle gears in the neutral position. Throttle only may then be applied. When the hand lever is returned to the neutral position, the throttle shaft automatically engages the throttle gear and the locking pin automatically disengages by means of spring loading. The locking pin prevents pulling out the shaft in other than the neutral position.A spring provides axial loading between a throttle arm connected to the shaft and a friction plate mounted on the shaft. This loading creates a frictional drag which prevents throttle creep.