Abstract: A hinged driveway gate opened manually or by a vehicle against a closing force is latched in the open position for an adjustable time interval for vehicle passage by the control mechanism having an improved support connection with the gate, an improved latch mechanism, a novel optional power spring, an improved dashpot and a novel protective cover.

Abstract: A read/modify/write circuit (10) for a computer is used in conjunction with a main memory (12) in which block operations are executed using a plurality of data units. The circuit (10) includes a first register connected to receive a data block from the main memory (12), a second register connected to receive data units from a requestor, such as a processor (18) and a third register in which a resulting data block is produced which comprises the data units to be written into the main memory (12) and the remaining data units which were previously in the block read from memory (12). Multiplex circuits (70, 72, 74, 76, 78, 80, 82 and 84) are commanded by a decoder (136) in response to the processor (18) to selectively route sections of registers (26 and 28) into a register (106). The resulting data block is then transferred through the memory bus (14) for writing into the main memory (12).

Abstract: Various vehicles (10, 200, 300) are provided with a rear supporting pedestal (30, 208, 316) which is movable between a forward position and a rearward position. In the forward position, the trailer unit of the vehicle can be tilted from the horizontal for dumping a payload or mounting or demounting a roll off container (318). In the rearward position, the effective legal wheel base of the vehicles is increased, permitting the gross vehicle load to be greater. The ability to vary the wheel base thus provides an increase in legal payload resulting in greater operating efficiency. In addition, a front helper lifter assembly (500) is disclosed which can be used to assist the lifting cylinders on a trailer in moving the tilting member of the trailer from the horizontal position.

Abstract: A method of supporting a structure comprises driving a pile casing through a hold in a structure to be supported until the leading end of the pile casing reaches its desired position and thereafter introducing a cutter into the top of the pile casing, positioning a cutting element of said cutter to a location at or near the lower surface of the structure to be supported, actuating the cutter to cut off the pile above said location so that the unwanted top portion of the pile can then be removed and introducing concrete into the pile casing and hole through the structure.

Abstract: Apparatus for volumetrically controlling a liquefied gas, such as agricultural ammonia, receives liquefied gas from a suitable pressure vessel through conventional hoses and fittings and removes the energy represented by vapor due to the pressure drop from the vessel to the metering means by either refrigeration or vapor stripping or both.

Abstract: This invention relates to automatic welding of confronting edges of two bodies between which is a groove to be filled with a material and, more particularly, to conditioning, processing and use of control signals representative of an integration of the absolute product of the differences between the arc voltage at the sidewall and the centerline arc voltage and the arc current at the sidewall and the centerline current for an integration window near the sidewall for automatic reversal of the traversing welding torch.

Abstract: A strobe light firing circuit is provided with an integrated circuit (10) for deriving both timing and power generating pulses. A field-effect power transistor (16) gates the power generation transients while effectively isolating the timing integrated circuit (10) from high transients during the switching of the transistor (16). Timing pulses from the timing circuit (10) are divided in frequency by a binary counter (38) and then sequentially applied at the output pins of a decade counter (40) for strobe timing sequence selection. A strobe light firing pulse is differentiated (48) to form a pulse for shutting off power generation pulses from time (10) for a time effective for the flash tube (58) to recover for a subsequent discharge.

Abstract: A furnace heat exchanger and support plate assembly are joined together at respective openings for the burner assembly and for the combustion products outlet by an oval rim defining the heat exchanger opening and a cooperating flange on a partition plate and extending perpendicular to the plane of the plate. The flange on the partition plate is inserted in the opening in the heat exchanger unit and expanded radially outward with respect to the central longitudinal axis of the openings to form a leakproof joint. An improved method of forming the joint includes the use of an expander mechanism which may be inserted through the opening in the plate into the interior of the heat exchanger and engaged with the plate flange to expand the flange radially outwardly. A complete nonwelded furnace heat exchanger assembly includes one or more support members which are secured to flanges of the heat exchanger units without welding or mechanical fasteners.

Abstract: A gas chromatograph system is provided with an improved electrolytic conductivity cell (16) for detecting a selected material species in a fluid stream from conventional gas chromatograph (10, 12) having both gas and liquid phases. Planar electrodes (80, 82) are spaced by an insulator (84) and define borehole diameters (88, 90, 92) which enhance the generated signal-to-noise ratio by providing a short fluid transit time within the conductivity detecting volume compared with the effective time of the chromatographic event of interest. A pneumatic damper (108) may be further included to reduce generated system signal noise.

Abstract: A variable speed drive of the type having a fixed pulley, a variable pulley mounted on a motor shaft and a drive belt coupling the two pulleys. The motor is pivotally mounted on a frame. An actuator is provided for pivoting the motor and variable pulley through an arc to vary the distance between the pulleys which changes the pitch diameter of the variable pulley and the drive ratio of the system. The variable pulley has one fixed face and one movable face, and a cam system is provided and positioned for engagement upon arcuate movement of the motor to cause a predetermined amount of lateral movement of the motor and variable pulley to compensate for changes in the drive line of the variable pulley to movement of the movable face thereof. In this manner, the cam system maintains the variable pulley, fixed pulley and drive belt in accurate alignment throughout the entire range of movement of the motor and corresponding range of variation in the drive ratio of the system.

Abstract: A lawn crypt (10) comprises a rectangular array of chambers (22). Each chamber (22) is defined by opposing side panels (34, 46) and opposing end panels (52, 64). A top panel (70) serves to close the chamber and is supported by the side panels (34, 46) and the end panels (52, 64). Each chamber (22) is divided into an upper vault (102) and a lower vault (104) by a horizontal divider (100). The side, end and top panels are fabricated of reinforced concrete such that the crypt (10) can carry the substantial burden of heavy mechanized equipment. By using heavy equipment the operations of opening and closing grave sites can be done with a minimal amount of labor and time.

Abstract: A physical cache unit (100) is used within a computer (20). The computer (20) further includes a main memory (99) a memory control unit (22), inputs/output processors (54, 68) and a central processor (156). The central processor includes an address translation unit (118), an instruction processing unit (126), an address scalar unit (142), a vector control unit (144) and vector processing units (148, 150). The physical cache unit (100) stores operands in a data cache (180), the operands for delivery to and receipt from the control processor (156). Addresses for requested operands are received from the central processor (156) and are examined concurrently during one clock cycle in tag stores (190 and 192). The tag stores (190 and 192) produce tags which are compared in comparators (198 and 200) to the tag of physical addresses received from the central processor (156).

Abstract: An apparatus comprising only tension-bearing members serves to interconnect first and second bodies and carry both tension and compressive forces between the bodies. A first tension-bearing member, such as a cable, is connected between first and second points of a first body and connected to a first point of a second body at a location along the tension-bearing member between the connections to the first and second parts of the first body. The first tension-bearing member carries tension forces to oppose the first and second bodies from moving together. A second tension-bearing member, such as a second cable, is connected between the first and second bodies for carrying a tension force to oppose the first and second bodies from moving apart. The combination of the two tension-bearing members serves to carry both the tension and compressive forces between the two bodies.

Abstract: A chain link belt includes a plurality of tube pairs, each pair comprising two tubes joined along their sides in a substantially parallel relation. A plurality of wires of predetermined lengths are used to join the tubes to form the belt links. The wires are formed in a quadrilateral with the tubes on opposite sides thereof and with the joined ends of the wire links positioned within one of the tubes hidden from view. One of the wires is engaged through one tube of the adjacent tube pairs and another wire is engaged through the other tube pairs for connection of other tube pairs to form the chain link belt.

Abstract: A child's food serving tray, such as used on a high chair, which is illuminated to entertain the child and to function as an educational device. The tray surface has various artistic and educational designs which incorporate a plurality of electric lights mounted in the surface. The lights may flash on and off in a predetermined repetitive sequence, or a plurality of manual switches may be provided on the surface of the tray so that the child can selectively control the operation of the lights.

Abstract: A conventional magnetometer produces an output signal (10) which comprises a series of pulses (12, 14, 16). Each of these pulses has a beat frequency maximum. These pulses are input to a comparator (50) which makes a comparison to a threshold voltage V.sub.0 to produce a bi-level detected signal at a line (62). The detected signal is input to an integrator (52) which produces a series of pulses (78, 80, 82) corresponding respectively with the magnetometer output signal pulses (12, 14, 16). The two states of the detected signal corresponding to positive and negative integration. The time period for the positive integration is proportional to the beat frequency maximum time width period for the corresponding magnetometer output signal pulse. Thus the integrated pulses (78, 80, 82) have an amplitude which is a measure of the maxima time width periods for the corresponding magnetometer signal pulses.

Abstract: A method for dressing wounds to prevent adherence of the covering dressing to the wound includes applying a surfacing barrier (20) as an interpositional material between the wound and covering dressing. The barrier is an extruded, nonwoven polymeric material permeable to blood and serum and having an air permeability between about 300 and about 1140 ft..sup.3 /min./ft..sup.2 and a thickness of between about 0.5 mils to about 3.0 mils. The barrier is positioned over the wound and surrounding area and conformed to the shape of the body being treated. The covering dressing is then applied over the barrier.