Abstract: A trainee station in a tractor-trailer training apparatus includes dummy controls simulating those of a tractor, and a display screen visible from the trainee station. At a remote diorama or terrain model a miniature tractor-trailer is moved atop the diorama in accordance with the operation of the trainee's dummy controls. A plurality of video cameras mounted within the cab of the miniature tractor provide video signals which are displayed on the mentioned screen. The fields-of-view of two of the video cameras embrace miniature rearview mirrors on the miniature tractor, providing realistic views of portions of the trailer as trainee operation of the controls moves the minature tractor-trailer about the diorama.

Abstract: The economics of waste disposal are markedly improved by combining a waste-burning plant with a gas turbine-generator set, with exhaust gas from the gas turbine fed as combustion air into a waste-burning incinerator. A boiler associated with the waste-burning incinerator supplies steam to operate a steam turbine and a second electric generator.

Abstract: Application of tension simultaneously to three cords extending through respective coil springs and attached off the axes of the springs causes movement of tactile members on the ends of the springs to grasp, lift and rotate a workpiece. A capacity sensitive sensor positions the coil assembly relative to the object so that the tactile members will grasp the workpiece in a uniform manner irrespective of workpiece size.

Abstract: A mechanical cord winding device in the form of a reel is secured to an archer's bow to apply tension to a cord which is fastened to a bowstring device or sight in such a manner as to align the back sight of the bow with respect to the front sight thereof. The reel is used to store the cord when the bowstring is displaced less than a predetermined distance from the bow. The reel is enclosed by a housing.

Abstract: The driver training simulator system of the present invention includes a visual display system and a student station. The student station has simulated automotive control elements such as a steering wheel, brake pedal, accelerator pedal, etc. The visual display system includes an arrangement for presenting images to the student, for example it may include a motion picture projector and an associated display screen. The images which are presented to the student include a plurality of separate sections. Each of the separate sections of the image is recorded by a separate camera. One of the sections of the image presented to the student is a conventional front looking "driver point of view" image, that is, the image that a driver would see looking through his front windshield. Another section of the images consists of images that were recorded by one or more cameras which were facing rearward.

Abstract: The attitude of a spacecraft can be effectively controlled in three axes using the combination of a gravity gradient boom and three electromagnets. The electromagnets are controlled according to a control law that takes into consideration signals from a magnetometer and a signal indicating the orbital angular velocity of the spacecraft.During the acquisition phase of the flight, the gravity gradient boom is not extended and electromagnets are operated according to a control law that only takes into account the output of the magnetometer. After the acquisition phase is complete, the gravity gradient boom is extended and the spacecraft enters the libration phase of the flight. In the libration phase of the flight, electromagnets are controlled according to a control law that takes into account both the output of the magnetometer and a signal which indicates the orbital angular velocity of the spacecraft.

Abstract: A plurality of electrically conductive plates, preferably ring-shaped, are spaced from one another and electrically insulated from a conventional conductive probe rod, but movable therewith. The sizes and spacing of the plates are selected to provide a desired variation in capacitance between the plates and the object as the probe rod and the plates are moved toward the object. The capacitance between the probe rod and the object also increases as the probe rod moves toward the object. By appropriately combining these two capactiances, a nearly consant net capacitance occurs when the probe tip is very near a desired distance from the object, for a range of object sizes.

Abstract: An exhaust gas containing sulfur trioxide is passed through a first heat exchanger which cools the gas to a temperature which is above the sulfur trioxide dewpoint, so that condensation of sulfur trioxide does not occur in the first heat exchanger, but below a material limit operating temperature of a second heat exchanger, which further cools the gas below the sulfur trioxide dewpoint, whereby the first heat exchanger is protected against corrosion and the second heat exchanger is protected against thermal damage.

Abstract: A hydraulic relief valve terminates release of fluid to lower a lift truck load carriage if the load carriage becomes supported by external structure during one stage of lowering, and an electrical switch terminates release of fluid, and may disable truck travel, if the load carriage becomes so supported during a different stage of lowering.

Abstract: In a lift truck having one steerable powered drive wheel assembly and a steerable idler wheel assembly interconnected by a pair of links and a crank, steering is accomplished by means which apply torque directly to the drive wheel assembly. The steering rotation of the drive wheel assembly rotates the idler wheel assembly, so that forces transmitted through the links and the crank to steer the idler wheel assembly are independent of drive wheel loading, and less motive force is required to steer the truck at large cramp angles.

Abstract: The present invention provides an improved telescopic mast structure for a hydraulically operated lift truck. The mast structure of the present invention has reeved hydraulic hoses which do not obstruct the operators view and a chain connecting the inner and outer telescopic sections so that inner telescopic section moves at twice the speed of the outer telescopic section. This chain is located inside a U shaped channel element that forms the mast mainframe. The U shaped channel that forms the mast mainframe fits around the I shaped elements that support the two telescopic sections and the chain interconnecting the telescopic sections is in front of the I member of the outer telescopic section and alongside of the front part of the I member of the inner telescopic section. The chain interconnecting the telescopic sections is therefore in a protected location and most important it does not add any length to the vehicle.

Abstract: A valve body containing a valve core comprises a generally cylindrical body having a tapered flange, allowing the valve body to be installed in a wheel rim so that none of it extends beyond the outer surface of the rim. The valve core is contained in a central tube spaced inwardly from an outer wall of the valve body, allowing entry of an air chuck to apply or check pressure.

Abstract: A cable clamp for temporarily gripping an end length of cable comprises a tubular member having a side slot extending the length of the tubular member to allow a cable to be inserted into and removed from inside the tubular member. Spring means urge a bar situated within the tubular member against cable extending through the tubular member, and a handle extending outside the tubular member allow the user to rapidly clamp and unclamp the cable.

Abstract: Flue gas is passed through a first heat exchanger, a wet scrubber, and a second heat exchanger. The first heat exchanger supplies heated liquid to the second heat exchanger to reheat the flue gas. The first heat exchanger comprises, and the second heat exchanger ideally comprises, a plurality of fluoroplastic-covered metal tubes extending through a fluoroplastic-lined gas passage.

Abstract: A basemented floor structure under a waste dump, whereby the burden of the waste body is transferred to piers and then onto foundations and the subgrade, and on which layers of sealing material, drainage material or protective material lie, is built up from individual support elements separated from one another by seams and having an upwardly convex or concave shape. By this structure, unequal setting of the subgrade can be accommodated without harm and cracks in the floor structure are prevented. The upper surfaces of the support element are inclined toward the piers. The seepage is taken from collecting zones through a water removal system to a purification plant.

Abstract: An exhaust gas containing sulfur trioxide is passed through a first heat exchanger which cools the gas to a temperature which is above the sulfur trioxide dewpoint, so that condensation of sulfur trioxide does not occur in the first heat exchanger, but below a material limit operating temperature of a second heat exchanger, which further cools the gas below the sulfur trioxide dewpoint, whereby the first heat exchanger is protected against corrosion and the second heat exchanger is protected against thermal damage.

Abstract: A garment to be worn with a cervical traction device includes four detachable slit openings extending from adjacent neck-shoulder areas of the wearer to lower extremities of the garment, allowing the garment to be put on and taken off the wearer.

Abstract: A hydraulic lifting and lowering system for battery-powered lift trucks includes an electronic control system which reduces or limits operator selected lifting commands in accordance with the current being drawn by an electric motor connected to drive a variable-displacement pump, and in accordance with the state-of-charge of the vehicle battery, to control a proportional valve which meters fluid flow to a lift cylinder.

Abstract: A metal panel carries views depicting a human spine. A plurality of movable pieces corresponding in shape to vertebrae or disks depicted on the panel are provided with magnet means, so that the pieces may be placed to overlie vertebrae areas on the panel to illustrate normal spinal conditions, and may be shifted on the panel to illustrate abnormal conditions.