Abstract: A fully enclosed protective cab for an industrial lift truck affording a high degree of visibility and including a rear face with a retractable panel section adapted to permit engine cover movement for access to the truck engine. The retractable rear panel section is arranged to slide in its plane between extended and retracted operational positions, thereby taking up minimum space, and is transparent to afford a clear rearward view in both of its operational positions.

Abstract: Improvements in the technique of sliplining a buried pipe, so as to minimize adverse affects of differences in expansion and contraction of the old and new pipe, while maintaining seals at the ends thereof is disclosed employing at each pipe end a sleeve-like pliable gasket, which is expanded outwardly into contact with the inner surface of the old pipe, and somewhat beyond the end of the old pipe, is contracted inwardly into contact with the other surface of the new or sliplined pipe. The sleeve-like gasket can compensate for thermally induced pipe line and liner axial length changes, without breaking the seal between the two, while seal installation is facilitated by the accessability of the sleeve-like gaskets extending beyond the ends of the old pipe.

Abstract: The present invention relates to new 4-carbamoyloxy-oxazaphosphorins of the general Formula I ##STR1## as well as to a method for the treatment of malign tumor diseases in humans using such compounds as active agent.

Abstract: The present invention relates to new S-(carbamoylphenylselenyl) derivatives of glutathione and of .alpha.

Abstract: A rotor assembly for an alternating current motor has a stator to cooperate with the rotor assembly. The rotor assembly includes a magnetically permeable rotor mass of a stack of rotor laminations which are mounted on a hub, and the hub is secured to a shaft which rotates in a stationary bearing fixed to the motor frame. The rotor mass includes apertures which extend longitudinally and die cast squirrel cage conductor bars extend through these apertures. Integral with the rotor assembly is a die cast extension on the rotor mass coaxially on one end thereof. This coaxial die cast extension surrounds one end of the shaft and is adapted to be connected directly to a load to transmit torque directly from the conductor bars of the squirrel cage winding from the load without the necessity of the torque passing through the shaft. The die cast extension may also have a non-circular configuration for readily transmitting torque to the load.

Abstract: Process for the preparation of metallic or semimetallic shaped elements, particularly of silicon, in a molten coating bath.Into a confinement crucible is placed the molten basic semimetallic metallic material and a molten coating bath which is inert with respect to said material and whose melting temperature is below that of the material. Into the material is introduced at least one frame-like part, made from a refractory material whose thickness for wetting is greater with respect to the metallic or semimetallic material than with respect to the molten coating bath. A metallic or semimetallic material shaped element is then produced on the frame by the slow displacement of all or part thereof. This shaped element is solidified in the liquid coating bath and finally the complete frame and the solidified shaped element are removed from the bath.

Abstract: A Geiger-Mueller tube-based radiation measurement device includes circuitry for the correction of the dead time losses associated with the Geiger-Mueller tube. As the event count rate rises, the transfer function (e.g., the closed loop voltage gain) of an operational amplifier responding to an event count rate signal is modified to compensate for dead time losses experienced at high count rates. Preferably, an analog switch controlled by the event count rate signal automatically sets the voltage gain of the operational amplifier at a level corresponding to the desired amount of dead time compensation required to provide an accurate measurement of actual events. The dead time correction circuitry disclosed herein finds practical application in the use of well-known analog rate meter circuits of the charge pump type.

Abstract: Improvements in flotation separating systems of the type employing small rising air bubbles to induce ascension of certain types of particles in a flotation compartment while other particle types descend toward the bottom of the compartment include a bubble passing, particle blocking barrier forming the bottom of the compartment separating the compartment from a source of air bubbles while allowing the introduction of a uniform distribution of air bubbles into the compartment in the form of a gently sloped conical plate having a plurality of aerated water passing apertures and an array of downwardly extending pocket forming baffles for limiting bubble migration along the slope of the lower plate surface. The baffles are generally configured as radially and circumferentially extending baffle portions.

Abstract: An oil cleaning assembly for an internal combustion engine comprising a centrifugal separator rotor and an oil filter element, wherein the filter element is located in an annular housing which extends around the rotor.

Abstract: The invention provides a tunnel lining and a method of constructing the tunnel lining by aligning prestressed resilient lining panels of uniform thickness, such as plywood sheets, where longitudinal edges of the panels abut to form a ring. The longitudinal edges of the panel correspond to, and impose thrust against a second longitudinal edge of an adjacent panel. The thrust causes bending of the panels to form an arc about the longitudinal axis of the panels and to cause internal stresses within the ring to counteract loads applied at the exterior of the panels. The ring can consist of multiple layers of panels.

Abstract: This invention relates to a waveform observation apparatus such as an oscilloscope, and more particularly to a waveform observation apparatus suitable for a liquid crystal oscilloscope having a liquid crystal display of low power consumption.The waveform observation apparatus comprises at least a waveform memory in which a waveform data is to be written, an input circuit to control the waveform memory to write the waveform data therein and a power supply circuit to drive the waveform memory and the input circuit. The power supply circuit includes means to only intermittently apply the power supply voltage for at least part of the input circuit for a time necessary for writing a waveform. This causes the power consumption to be lowered.

Abstract: A filament-wound plastic pressure vessel and technique for fabricating such vessel are disclosed. The pressure vessel includes a monolithic plastic liner having a cylindrical side wall portion and domed end portions. A multiplicity of resin-impregnated reinforcing filaments are wound about at least the cylindrical side wall portion of the liner in a predetermined winding pattern. A non-axial access opening to the interior of the tank is cut through the liner and through the filaments, resulting in discontinuous filament ends at the periphery of the opening. A reinforcement is provided for the filament ends to redistribute stress transmission paths around the opening. The reinforcement includes at least one randomly oriented fibrous mat pad sandwiched between a pair of woven cloth pads having a basket weave configuration.

Abstract: This invention relates to closure retention apparatus for automatic doors, and more particularly to an electrical circuit for providing a reduced amount of electrical power to the motor which controls the opening and closing of the door. The circuitry includes first circuit means for applying a first level of power temporarily to said motor for operating the door from open toward closed position, and a second circuit for applying a second, reduced level of power continuously to the application of the first level power thereto for a preselected period of time for operating said door toward closed position also.

Abstract: Limited slip differential mechanisms and assembly techniques therefore are disclosed providing enhanced strength and durability without increase in over all size. Positioning the parting plane of a two part differential mechanism case outside the chain of elements transmitting the torque through the differential mechanism while at the same time increasing the size of side and pinion gears within the case and modifying both the case interior machining technique and the technique for assembling the components within the case yields the strength and durability advantages.

Abstract: A suspension ceiling grid system is disclosed which provides intersections including through-runners and oppositely extending runner ends. The through-runner is provided with a connector opening and the runner ends are provided with identical end connectors. The end connectors are engaged and disengaged by lateral movement and provide spring means which resiliently urge the end connectors toward the locked position. The end connectors provide two locking systems, one of which provides a connection with the through-runner when only one connector is installed in the connector opening, and subsequently provides an improved strength functionally direct connection between the two end connectors when two end connectors are installed within the connector opening from opposite sides. The end connectors provide a second separate locking system which directly connects between the two end connectors. In one embodiment, a connector system is disclosed which allows easy removal of a runner within an assembled grid.

Abstract: A pilot-operated, directional flow control valve includes a movable spool member axially slidable between two positions within a cylindrical bore provided by a multi-ported valve body. An integral portion of the valve body serves as a housing for an inverted, cup-shaped filter element having its lip portion spring-biased downwardly against an annular seating surface. The filter element housing portion of the valve body provides a horizontally extending blind bore functioning as a supply fluid inlet port to the valve. The blind bore inlet communicates with an inlet to the interior of the filter element, the filter element extending perpendicularly upwardly from a point spaced from the terminal end of the blind bore inlet. The orientation of the horizontally extending blind bore inlet relative to the vertically extending filter inlet provides a mechanical filtering action to trap heavy dirt particles at the end of the blind bore before they can enter into the filter element and prematurely clog it.

Abstract: An upright vacuum cleaner has a removable powered brush vacuum nozzle which can be removed and replaced without operation of a belt lifter. The power linkage from the cleaner's fan motor to the nozzle brush includes a positive-drive clutch, and control means active at the inception of each operation of the cleaner in the brush-and-vacuum mode to engage the clutch prior to starting the fan motor and active at the conclusion of operation of the cleaner in the brush-and-vacuum mode to disengage the clutch only after stopping the fan motor.

Abstract: The invention relates to new O-acyl-alkanediol-phospholipids of the general formula I ##STR1## processes for their preparation and process for the treatment of certain diseases in humans.

Abstract: A vertical furnace for heat-treating a semiconductor is disclosed which is capable of effectively and safely accomplishing the heat-treating of a semiconductor. The vertical furnace includes a furnace section which is open at the lower end thereof to allow a boat for supporting a semiconductor thereon to be introduced and removed through the lower open end with respect to the furnace section. Also, a vertical furnace is disclosed which is adapted to effectively prevent a semiconductor from being polluted by dust in an operation space.