Abstract: An amplifier (10) is disclosed including circuity for improving the amplifiers performance, particularly the common mode rejection of differential amplifiers, by adding the amplifier input signal to the power supply signals which power the amplifier. Voltage dividers (42, 44) are connected between the amplifier output (16) and each of the two power supply rails (26, 28). Each divider includes resistors (46, 48; 50, 52) selected so that the amplifier output is divided down by a factor equal to the gain of the amplifier. The junction signals (V.sub.J1, V.sub.J2) provided by the two voltage dividers thus each includes a component equal to the input signal. The junction voltages are applied to the amplifier power input terminals (18, 20) by respective transistors (60, 62), each connected in a voltage follower arrangement. One embodiment (FIG. 4) incorporates a servo amplifier (100) for DC offset stabilization.

Abstract: A method and apparatus for assembling newspapers which have a jacket and a plurality of inserts within the jacket are disclosed. The apparatus includes a circular array of stations and a rotor carrying a plurality of pockets which move below the stations. A two-speed transmission is provided so that the rotor can be driven at either of two speeds. At each station there is a hopper for feeding a jacket or insert into the pockets as they move below. The jacket feeding stations are grouped into a group of two or more adjacent stations. The insert feeding stations are likewise grouped into groups of adjacent stations having two or more in each group. All groups have the same number of stations and the stations in each group all feed an identical jacket or insert. In addition there is a single opener station for opening jackets before inserts are fed into the jackets and a single delivery station for each group of jacket feeding stations. In one embodiment each group includes two stations.

Abstract: An improved method and apparatus for forming cast-in-place structures includes the use of a sheet of fabric having a plurality of pockets for receiving support rods. The pockets are formed between an inner side surface of the sheet of fabric and a plurality of strands of material. The support rods are used to hold the fabric in place while a slurry of a cementitious material is poured into a cavity between the sheet of fabric and a base. The cementitious slurry flows between the strands of material into the support rod receiving pockets. The resulting concrete structure extends around the support rods to prevent them from being exposed to the environment. The strands of material are advantageously connected with the sheet of fabric by interweaving them with the threads of the fabric.

Abstract: In shears for rod-form material, especially in connection to roll trains, the problem exists of a space-saving construction, especially in the sidewise direction, in view of the multiple arrangements, as well as increased safety (reliability) of operation for the high-pressure hydraulic system of the cutting drive.The shear provided with two knife holders (MT1, MT2) and a fluid drive element (ZK) as well as a respective pressure feeding device (DS), is so designed, for this purpose, that the pressure work chambers (DA1, DA2) of the drive element, such as a double-acting cylinder-piston arrangement, and the elements carrying pressure fluid (high-pressure pumps, etc.) of the pressure feeding device (DS) are designed to be movable in common with a knife holder (MT1) which is movable in relation to the machine frame or a conduction (SF) of material to be cut, and preferably fixed in space with this latter (MT1).

Abstract: An improved power steering control apparatus includes a power steering motor having a piston rod which extends through one end of the motor cylinder. This results in the rod end of the piston having a smaller working area than the head end of the piston. In order to equalize the fluid pressure forces on opposite sides of the piston when the motor is in an inactive condition, a power steering control valve vents both sides of the piston to atmospheric pressure when the control valve is in a neutral or unactuated condition.

Abstract: Device for the electrical connection of at least two structural elements, preferably of annular shape, which are arranged on a common axis and are rotatable with respect to each other, which form contact elements and are provided with electrical connecting elements, and between which conducting rolling bodies are arranged serving as electrical connection-elements against which said contact elements are braced, and at least one spring- or pressure element is provided, by which the contact elements are permanently in contact with the rolling bodies by a mechanical preload.

Abstract: Drive device for moving the end fitting of a passive safety belt along a predetermined motion path which has in particular track sections extending at an angle to each other, by means of flexible tensioning means which can be driven by an electric motor drive, which is coupled to the end fitting to be moved. A flexible endless cable is provided which is connected to a coupling fitting and is guided at least at the deflection points on guidance and deflection elements, preferably on rolling elements, is provided as tensioning means.

Abstract: The present invention is directed to the removal of phosphorous material, such as apatite from phosphorous bearing materials, preferably those having a particle size less than 0.25 mm. The beneficiation treatment process comprises treating an aqueous phosphatic slurry with an alkaline EDTA complexing material. After contacting the aqueous mineral slurry with the complexing agent for a sufficient period of time, the divalent cation of apatite is complexed with the complexing material, which in turn releases the associated anionic species of apatite into solution for removal and recovery.

Abstract: An improved method of making an airfoil includes stacking plies in two groups. A separator ply is positioned between the two groups of plies. The groups of plies and the separator ply are interconnected to form an airfoil blank. The airfoil blank is shaped, by forging or other methods, to have a desired configuration. The material of the separator ply is then dissolved or otherwise removed from between the two sections of the airfoil blank to provide access to the interior of the airfoil blank. Material is removed from inner sides of the two separated sections to form core receiving cavities. After cores have been placed in the cavities, the two sections of the airfoil blank are interconnected and the shaping of the airfoil is completed. The cores are subsequently removed from the completed airfoil.

Abstract: Retrofit apparatus (38) for attachment to a utility meter (10) to detect revolutions of a dial arm (34) of the utility meter. A piezoelectric crystal (42) is provided against which a striker arm (52) abuts. The striker arm is rotatable on an axle (50) and is therefore movable relative to the piezoelectric crystal. A spring (54) is tensioned so as to resiliently bias the striker arm against the crystal. A shoe (62) is also mounted on the axle and is disposed in the path of rotation of the dial arm so that once each revolution the dial arm engages, deflects, and releases the shoe, thereby causing the striker arm to withdraw from and then snap back against the piezoelectric crystal. The crystal produces an electrical pulse in response. The pulses are counted by a counter (82) to provide a count indicative of utility usage.

Abstract: Safety belt roll-up device with a mechanism for blocking the belt roller in case of danger. A control disc rotatably supported on the belt shaft moves when activated by a vehicle-and/or belt-sensitive sensor arrangement relative to the roller shaft. A control pawl is eccentrically and hingeably supported at the roller shaft. The control pawl at the occurrence of the mentioned relative motion is moved by the control disc against the force of a spring, and is coupled with a control part which effects the engagement of a locking lever in locking teeth. The control pawl and the control disc can be coupled to each other by a drive-projection, which is arranged in the immediate vicinity of the control pawl-tilt axis at one of these parts, and extends into the motion path of the other part.

Abstract: A polyphase PDM amplifier is disclosed including plural parallel PDM amplifier stages (10, 12, 14, 16), all amplifying the same input signal. The PDM amplifier outputs are combined to produce a combined amplifier output. The various PDM amplifier stages modulate PDM carrier signals of like frequencies but differing phases. Capacitors (40, 42, 44, 46) are connected from each amplifier output to a common circuit node (48). These capacitors reduce the amplitudes of the spurious, out-of-phase components in the amplifier outputs which are introduced by the PDM modulation-demodulation process.

Abstract: A fluid fuse operable to shut off fluid flow upon rupture of fluid conducting line downstream of the fuse. The fuse is actuated by two forces generated by pressure differential caused by sudden decompression of the fluid and developed across two variable, sharp edge, viscosity insensitive orifices, positioned in series and separated by a flow cut-off and sealing surface. The closing force, generated by the pressure differential of the upstream orifice is dominant and increases with the displacement of the closing member in a predetermined manner, permitting the use of a high preload and high rate opposing spring, at relatively low pressure differentials. The sealing surface of the fuse is provided with limited freedom of alignment to permit tight sealing. The fuse assembly includes a manually adjustable bypass arrangement and a pressure peak attenuating control.

Abstract: The present invention provides a new and improved method of making an improved turbine engine component having an annular array of airfoils connected wth inner and outer shrouds. The airfoils are cast separately from the shrouds to enable the airfoils and shrouds to be made from either the same or different materials. The airfoils advantageously have an elongated columnar grain structure with grain boundaries extending parallel to the leading and trailing edges of the airfoils. The inner and outer shrouds are formed of a plurality of arcuate sections which also may have an elongated columnar grain structure. The ends of the arcuate shroud sections are interconnected in such an orientation that the grain boundaries extend circumferentially around the circular shrouds to minimize the extent to which ends of the grains are exposed. In another embodiment of the invention, each of the arcuate shroud sections is formed of a single crystal.

Abstract: Device for the electrical connection of at least two structural elements which are disposed on the steering wheel axis of a motor vehicle and rotatable with respect to each other, preferably between a support part fixed to the chassis and an electrical ignition device of an airbag stored at the steering wheel serving as impact protection for the passenger, and wherein that rolling bodies made of an electrically conducting material are provided for the electrical connection, which are arranged between a stationary contact element and a rotatable contact element, whereby said contact elements are preloaded against each other.

Abstract: Method and apparatus are disclosed for communicating utility usage information from a utility usage location to a portable utility usage registering device (22). A utility usage detection circuit (10) is provided at the utility usage location. The circuit is connectable to a conventional utility meter (12), e.g., a natural gas meter, and provides an electrical signal indicative of utility usage. This signal is applied across a first inductive coil (23), which is mounted at the utility usage location such that the resulting magnetic field is accessible. A matching coil (36) is associated with the portable utility usage registering device and is housed such that it may be positioned within the magnetic field produced by the first inductive coil. When thus positioned the electrical signal produced by the circuit (10) is induced in the matching coil as a result of mutual inductance between the two coils.

Abstract: A getter selected from the group consisting of zirconium, hafnium, yttrium, and mixtures thereof is used as an additive for metal coolants, e.g., sodium, potassium and sodium-potassium alloys, in metal cooled internal combustion engine valves.

Abstract: A low noise amplifier circuit (FIGS. 4 and 5) is disclosed including plural differential amplifiers having their inputs and outputs connected to common input and output lines (50, 52; 54, 56). In the disclosure, each differential amplifier is comprised of a pair of bipolar junction transistors (40, 42; 58, 60; 64, 66) of the same type. Parallel connecting of the differential amplifiers in the disclosed fashion reduces the Johnson noise introduced by the base spreading resistances of the individual transistors. Since differential amplifiers, per se, are connected in parallel rather than their component transistors, thermal runaway is not a problem.

Abstract: A rotary printing press comprises a rotatable blanket cylinder and a plate cylinder disposed in rolling engagement with said blanket cylinder. A skew-adjusting means varies the angle between the blanket and plate cylinders. A form roll is disposed in rolling engagement with the plate cylinder. Plate cylinder throw off means moves the plate cylinder to disengage the plate cylinder from the blanket cylinder. The plate cylinder throw off means comprises means for disengagement of said plate cylinder from said blanket cylinder without skew movement of the plate cylinder. Form roll-plate cylinder adjustment means is provided for adjusting the center-to-center distance between the form roll and the plate cylinder. A cam has surface means for maintaining the center-to-center distance between the form roll and the plate cylinder as the plate cylinder is thrown off the blanket cylinder and as the skew adjusting means varies the angle between said blanket and plate cylinders.

Abstract: A method and apparatus for handling signatures such as magazines or the like which includes the on-line printing of personalized information onto materials to be inserted within a finished magazine. The system also provides on-line printing of personalized information onto materials adhered to the magazine cover, such as the address label. The on-line printed materials and the magazine or other signature are combined after the on-line printing is completed. The system operates under control of a process computer which includes means for storing the personalized information.