Abstract: Flexible, microporous, hydrophobic and oleophobic film-like composite structures comprised of from about 25 to about 75 parts by weight of inorganic reinforcing microfibers, particularly glass, and from about 75 to about 25 parts by weight of a polymeric binding agent, preferably a copolymer of ethylene and vinyl acetate, the polymeric binding agent being in the form of a continuous matrix and derived from an emulsion or latex of the binding agent in which the particles of the binding agent are less than about 1 micrometer in size. A treating agent, preferably a fluorinated hydrocarbon, is present in an amount sufficient to render the composite structure hydrophobic and oleophobic.

Abstract: An adaptive control for a turning machine which adjusts the machining rate to maintain the actual horsepower dissipated at the cutter tip at a constant set point despite changing workpiece and cutter parameters. The machining rate is adjusted by control of the machine drive and tool feed to achieve required SFM and IPR values, respectively, within maximum and minimum SFM and IPR limits. "Speed" and "Axis" override controls are also provided. The rate of adjustment of SFM and IPR to a deviation of the cutter tip horsepower from the set point is inversely proportional to the measured system gain so that the response factor of the control loop is maximized. The cutter tip horsepower is determined by subtracting the electrical loss, mechanical friction loss, and the net power required for net acceleration of the drive, from the measured electrical power supplied to the drive motor. The cutting efficiency is monitored to perform tool wear, tool breakage, and tool protection functions.

Abstract: A centerless grinding system comprises a driven grinding wheel, a driven regulating wheel, and a work rest blade for centerless grinding of a workpiece supported by the work rest blade between the grinding wheel and the regulating wheel; means for determining the rate of reduction of the workpiece radius while it is being ground; and means responsive to the rate of reduction of the workpiece radius for controlling the ratio of the power consumed in removing workpiece material to the rate of removal of workpiece material by the grinding wheel. The regulating wheel is preferably fed toward the grinding wheel to feed the workpiece into the grinding wheel. In a similar center-type grinding system, the workpiece is mounted on spindles or chucks which are movable toward the grinding wheel so that the workpiece can still be fed by the regulating wheel.

Abstract: A control unit and method for operating a gap-type electromagnetic clutch or brake is provided which reduces audible chatter, screeching caused by belt slippage and related wear and tear on the driving and driven components. The operating winding of the clutch or brake is energized to cause the gap between an armature and rotor to close, energization of the winding is then reduced to initially reduce the torque coupling between the armature and rotor and finally energization of the winding is gradually increased to full energization so as to provide a gradually increasing torque coupling between the armature and rotor.

Abstract: A blocking sled designed for the development and practice of football pass blocking techniques having a base with an elongated arm pivoted thereto. Operatively connected between the arm and the base is a piston arrangement in which the piston rod supports a compressible spring so that movement of the arm towards a 90.degree. angle with respect to the base is resisted. In use, a player generally stands on either side of the arm and strikes with the palms of his hands an impacting surface integral with the arm, thus causing the arm to move about its pivot through a 90.degree. angle with respect to the base.

Abstract: A manual controller for producing an output signal for control of hydraulic valves and the like. The controller has a quadrant lever consisting of an inner tube connected to a shaft and an outer tube slidable thereover. The inner tube has a palm rest at its upper end while the outer tube has an annular finger grip. The inner tube carries a slidable plug which is downwardly spring pressed and which is coupled to the outer tube to urge the finger grip downwardly away from the palm rest. A cam track is arranged on the frame closely parallel to the plane of swinging movement of the lever. The cam track is engaged by a cam follower which is secured to the outer tube.

Abstract: A height adjusting device for the truck of a railroad vehicle including spring retainer supporting members consisting of a plurality of concentric segments which are arranged around the axis of a spring retainer in symmetry with respect to the axis. Each segment has an upper surface which is so stepped that the height thereof is successively increased as the distance of the upper surface from the spring axis increases, providing thereby a plurality of horizontal supporting surfaces, and a tongue or groove for locating and fixing the segment. The spring height can easily be adjusted simply by changing the position of the segments relative to the spring retainer.

Abstract: Two weatherstrippings are joined before the application of any backing to the woven strip of artificial yarn which carries the rows of pile which form the air barrier. A plastics material is placed across the butted ends of the strips in contact with the lower surfaces of the strips and the two are then welded together ultrasonically to join the weatherstrippings. The backing can then be applied over the joint. A jig for performing such a joining method comprises two holders for carrying the strips by their pile with the lower surfaces uppermost. The holders are formed in two parts to allow the strips to be cut to form a clean straight end. One part of each holder is then removed and the remaining parts slid together to butt the two strips. A piece of heat-weldable material is then placed over the butted ends in contact with the lower surfaces and is heat welded to the strips to complete the join.

Abstract: This invention relates to a method of and a device for the weighted measurement of quantities of liquid per unit area and/or the relative quantities of a liquid per unit area by means of an acoustic sensor. More particularly, the method permits the measurement of quantities of liquid and/or relative quantities of a liquid per unit area at the outlet of a nip formed by two rollers completely or partially covered by the liquid and/or liquid mixture concerned, the rollers rolling one upon the other and the layer of liquid in the nip being split at the nip outlet. Splitting of the layer of liquid occurs particularly in printing machines and glue applying machines, to which the invention can accordingly be applied.

Abstract: A door lock arrangement for a vehicle in which there is no pillar against which the trailing edge of a forwardly hinged door may engage, includes locks provided at the top and bottom corners of the door and a centrally located mechanism for simultaneously operating said locks. This mechanism includes means for producing both of the so called "keyless locking" and "self cancellation" functions.

Abstract: A variable-voltage variable-frequency elevator control apparatus is disclosed in which a circuit for the consumption of regenerated power produced during regenerative braking is provided on the DC side of the apparatus rather than on the AC side. During regenerative braking with an emergency generating unit in operation, regenerated power is consumed by the consumption circuit on the DC side of the circuit and is prevented from being returned to the emergency generating unit. This prevents the production of voltage notches commonly produced during regenerative braking by thyristor commutation in conventional circuits. Because no voltage notches are produced, a reduction in the size of the emergency generating unit can be achieved. In addition, since it consumes DC power rather than 3-phase AC power, the consumption circuit requires fewer elements than in conventional control apparatuses.

Abstract: A buffering mechanism for an automotive starter using planetary gear speed reduction mechanism between a motor and a pinion torque transmission mechanism is disclosed, in which elastic members are provided in spaces defined between circumferentially opposed sides of depressions formed in the outer periphery of a ring gear of the planetary gear speed reduction mechanism and depressions formed in the inner periphery of a member receiving a reaction force.

Abstract: A supervisory apparatus for elevators wherein cages are respectively caused to disperse and wait at predetermined floors during an inactive elevator operation during which a demand for the cages has decreased; the demand magnitudes of the cages in each of a predetermined number of time zones into which one day is divided, future demand magnitudes are estimated for each time zone on the basis of the measured values, and a suitable number of floors are allotted to each cage on the basis of the estimated demand magnitudes so that the respective cages may take charges of equal demand magnitudes during the inactive elevator operation. Further, the waiting floor of each cage is determined at that floor of the allotted floors at which an expected value of a period of time required for responding to a next occurring hall call becomes the smallest.

Abstract: For the rapid simultaneous engagement, disengagement and adjustment of all the applicator rollers at the plate cylinder of a printing machine, cam discs are mounted on the journals independently of the plate cylinder bearing. In an offset printing machine, the inking and damping rollers are each associated with their own cam discs. The cam discs are pivotable by means of drives, about the journals, with respect to adjustable stops for the engagement positions and end stops for the disengaged positions of the applicator rollers. The applicator rollers are mounted on rocker arms with respect to the stationary axis of the distributors preceding the applicator rollers and are adjustable with respect to the plate cylinder through the agency of adjustment means which co-operate with the cam discs. Adjustment of the applicator rollers during operation is effected by way of the cam discs which, in addition to the disengagement lobes, have cam zones for the roller engagement and adjustment.

Abstract: A combiner for transmitting and receiving co-polarized microwave signals in a selected propagation mode in at least two different frequency bands, the combiner comprising a main waveguide dimensioned to simultaneously propagate signals in the different frequency bands, at least a portion of the main waveguide being overmoded; at first and second junctions spaced along the length of the main waveguide for coupling signals in the different frequency bands in and out of the main waveguide, at least the first junction being located in an overmoded portion of the main waveguide and having side-arm waveguide means associated therewith for propagating signals in one of the different frequency bands; filtering means disposed within the main waveguide and operatively associated with the first and second junctions, the filtering means having (1) a stopband characteristic for coupling signals in a first one of the frequency bands between the main waveguide and the first junction and the side-arm waveguide means associat

Abstract: The ink ribbon feed mechanism comprises a pair of spool shafts adapted for carrying ribbon spools, a pair of feed pawls selectively engaged with one of the ratchet wheels on said spool shafts for imparting intermittent rotation to the spool shafts, and a reverse mechanism for changing the engaging state of the feed pawls relative to the ratchet wheels. The reverse mechanism includes a first member movable from one to the other direction through a connecting member which is adapted to rotate in unison with the ratchet wheel in dependence upon an operation of a sensor for indicating that reversal of the ribbon take-up direction is required, a second member movable from one to the other position after travel of the first member through a predetermined distance, for changing the engaging state of the feed pawl, and first and second detent members being provided for positioning the members in their two positions.

Abstract: An ink fountain for a printing press has a temperature-responsive element for compensating the adjustment of the spacing between the blade and the fountain roller to keep the thickness of the ink film fed by the blade substantially constant even under extreme temperature variations. The sub-frame of the ink fountain is pivotally mounted to the main frame of the printing press about a pivot axis generally parallel to the axis of the fountain roller, and the pivot angle is a function of the thermal expansion of the temperature-responsive element. In one preferred embodiment, the temperature-responsive element is elongated, received in a guide fixed to the sub-frame, and has a free end bearing against the bearing bushing of the fountain roller. In another embodiment, the temperature-responsive element is a side wall of the ink trough or is a plate parallel to the side wall of the ink trough, and rollers are journaled to the temperature-responsive element and bear against the surface of the fountain roller.

Abstract: A mounting system for repeatedly attaching and detaching an optical sighting device having a sighting axis to and from a supporting base having a base axis without interfering with the alignment between the two axes when the sighting device is in place on the base. The system utilizes a plurality of precisely spaced locating points between the holder of the sighting device and the supporting base. It is highly precise, relatively simple in construction, and may be attached and detached without tools. The system finds particular but not exclusive utility for mounting a telescopic sight on a rifle or other firearm.

Abstract: The invention relates to a hand-held firearm comprising a muzzle silencer (9) and a barrel (11) which is provided with transverse bores and is surrounded by an expansion area (15) into which the transverse bores extend. The transverse bores (14) enable the muzzle velocity of the bullets to be less than Mach 1, in spite of the use of conventional ammunition, and there is consequently no supersonic boom of the bullet. To selectively eliminate the reduction in firing energy involved therein and be able to shoot with maximum firing force, the transverse bores (14) are selectively closable by a locking device (16) which is preferably in the form of a sleeve (16) which surrounds the barrel (11) and is mounted for rotation thereon and is furthermore provided with an actuating member (21) for setting the open or closed position.

Abstract: A variable venturi carburetor comprises an auxiliary intake air passage, an auxiliary variable venturi and a non-adjustable nozzle portion, in addition to a main intake air passage, a main variable venturi and an adjustable nozzle portion. If the amount of intake air is small as when the engine is being idled, intake air is passed mainly through the auxiliary variable venturi to generate vacuum sufficiently high to jet fuel into the auxiliary intake passage through the non-adjustable nozzle portion. If the amount of intake air is great as when the engine is running under a heavy load, intake air is passed mainly through the main variable venturi. Since two venturis are formed, it is possible to smoothly increase the amount of fuel to be jetted into the intake passage over a wide engine operating condition.