Abstract: A control device produces a control deviation signal representing the difference between the commanded engine speed and the actual engine speed. Before this signal is applied to a fuel control unit to establish the rate of fuel flow to the engine, its time derivative is limited to a value substantially proportional to the distance that the operating state of the engine is from the surge line. In one embodiment the control deviation signal is differentiated with a lag corresponding to the lag of the fuel control unit before effecting said limiting and, after said limiting is effected, is integrated with a lead corresponding to said lag.

Abstract: An air column is employed in a sump pump to exclude liquid and foreign matter therein from the pump interior until a time just prior to priming and pumping. Just prior to the pump being turned on the air column is vented, thus permitting the liquid to rise to a level in the pump commensurate with the level elsewhere in the sump and thereby priming the pump.

Abstract: An annular ferromagnetic portion, i.e., "track", of the body to be balanced is rotated adjacent a first electromagnet having a decaying magnetic field which renders that track magnetically homogeneous. Thereafter, a large electrical current of short duration from the discharge of a capacitor is passed through a second, marking electromagnet positioned adjacent that track to produce a high-intensity magnetic pulse. This magnetic pulse produces a very localized spot of permanent magnetization in the track which spot serves as the reference "mark". When the body is then rotated during its balancing operation, that mark will produce an electrical signal each time it passes a magnetic/electric transducer positioned adjacent the rotating track.

Abstract: Two vertically movable carriages are alternately reciprocated. Each carriage holds two broaches positioned at opposite sides of the ways that guide the carriage. In one embodiment workpieces are moved from a magazine between the carriages alternately to work stations beside each carriage. In another embodiment the workpieces are moved between the two broaches in a series of three steps, the first broach acting on a given workpiece during a dwell before the first step and the second broach acting on that workpiece during a dwell after the third step. In yet another embodiment the workpieces are held by a chuck which, between successive broaching strokes, rotates the workpiece about an axis normal to the broaching strokes.

Abstract: A cooking grill using newspaper, charcoal, wood or other dry fuel has four sides hinged to a base plate to fold in upon the base. The wire grid holds and locks the folded stack together and provides a handle for the pack. Provision is made for the optional use of a charcoal grate at one of several alternative levels and the wire grid has two possible levels. Provision is also made for spit broiling. One side or two adjacent sides may be opened outwardly to provide convenient access for fueling and a fireplace effect which can provide heat for a reflecting oven.

Abstract: A drone acoustical transducer for a loudspeaker system has an improved means of interconnecting the generally conical speaker diaphragm and supporting basket. In conventional fashion, the acoustical transducer includes a generally conical speaker diaphragm supported within a vented basket having an open front and a rear wall. The large, front end of the diaphragm is flexibly connected to the front of the basket by means of a supple annulus. The basket has a rear wall having an upstanding boss which is coaxial with the diaphragm and smaller in diameter than the small end of the diaphragm. A flexible spider interconnects the small end of the diaphragm with the boss, allowing full excursion of the vibrating speaker diaphragm. To allow for maximum excursion of the diaphragm, the rear wall of the basket may be concave as viewed from the rear.

Abstract: A sump motor is mounted in a section of pipe. The motor is a standard motor having special caps at each end of the motor shell and with the shell forming a waterproof enclosure. The caps have radially extending spacers extending out to the pipe. At each end of the pipe are reducers, the internal diameter of the small ends of which correspond to the external diameter of another, smaller standard pipe size. At the bottom a piece of pipe of the smaller size extends inwardly of the reducer to a location in juxtaposition to the pump impeller. Various connections and mounting arrangements may be made using standard sizes of pipe. In one embodiment the pump is mounted on a vertical track and positioned above a sump. When the water rises to a level in the sump at which pumping should commence, the motor is energized and the pump is lowered along the track into the sump.

Abstract: A preform is made by casting a copolyester polymer elastomer into a block. While the block is solidifying, pressure is supplied to the central portion thereof. After a block is formed, it is annealed and a precompression force is applied thereto sufficient to compress the block to an extent greater than thirty percent of the original dimension of the block as measured parallel to the precompression force. In one embodiment a cushioning unit using the block is made by placing a pair of multi-apertured metal plates on opposite sides of the block with projections on the plates extending against the block and applying a second precompression force to the block and plates sufficient to cause the copolyester polymer elastomer to flow into the apertures in the plates and form a mechanical bond between the block and the plates.

Abstract: The container has four walls and a base plate. The walls join at vertical double-walled corners. The base plate has corrugations running diagonally thereacross, which corrugations are of trapezoidal cross section. Vertical ribs extend between the corrugations on the underside of the base plate. Along the top of the walls is a band of "E" shaped cross section between each adjacent pair of corners. Below each band the wall tapers outwardly to a vertical lower portion. The wall below each band tapers inwardly to the inner wall of the double-walled corner. The walls, corners and base plate are integral and have supplemental feet welded thereto, each foot being below a respective corner.

Abstract: A body and cap connected by a hinge are integrally molded from plastic. The body is adapted to be connected to a container and has a dispensing spout which may be centered or offset. At the distal end of the spout is a tubular portion surrounded by a channel. Capillary bores extend generally parallel to the axis of the spout from the base of the channel to an interior in the spout. Adjacent the distal end of the spout is a spherical bulge. The cap has an internal opening complementary to this bulge so that the cap fits sealingly thereabout. The body and cap have annular exterior walls which meet in a plane inclined at about fifteen degrees to the horizontal (when the top of the container to which the body is secured is horizontal). Several forms of hinges and components biasing the cap are disclosed.

Abstract: A foldable stand for a bassinet or the like has four upright legs in a rectangular configuration when unfolded. At each end of the stand, the legs are rigidly interconnected by a horizontal bar supporting the corresponding end of the bassinet. Above the support bars at opposite ends of the stand, opposed U-shaped guard rails are pivotally mounted to the tops of the legs such that when deployed the guard rails bracket the lower ends of the bassinet. A diagonal cross brace is pivotally connected at one end to a point near the bottom of each leg and at the other end to the end of the U-shaped guard rail which is connected to the top of the corresponding leg on the same side of the stand. There are four such cross braces, two of which crisscross on each side of the stand and are pivotally interconnected like scissors so that the two end pairs of legs can be collapsed toward each other while remaining parallel as the cross braces close and the guard rails tip upright.

Abstract: Above the base are a pair of arms pivotally mounted about a common axis and extending in opposite directions from the axis. At the distal ends of the arms are a pair of downwardly extending pins which form sensors and position the arms at various angular positions depending upon the tension of the tensioned sheet upon which the base rests. A pair of plates extend upwardly from the arms, intercepting a light beam. The amount of the beam intercepted will vary depending upon the angular position of the arms. A photo detector is positioned to receive the unintercepted part of the beam and to produce an electrical signal varying with the amount of light received. A digital voltmeter provides a visual indication of the magnitude of the electrical signal.

Abstract: For screen printing, in which the screen fabric is tightly stretched across a frame structure, the frame, or at least its side bars, are formed of a plastic material which can be surface-softened by means of solvent or heat for bonding the fabric to it, thus providing the bonding agent in situ. The fabric is initially stretched over the face of the frame structure. The surface of the frame structure is softened, after which, to achieve the bonding, either a solvent is applied to the face surface through the fabric or this surface is heated through the fabric. After completion of the printing job, the fabric may be pulled away from the frame and the frame and fabric repeatedly reused. The removed screen fabric may be stored for future use.

Abstract: A unitary bracket for both a closet shelf and rod has a substantially horizontal shelf support and a concave rod support, both projecting from a sidewall which is attached to a wall of the building structure. A locking tab projects from the sidewall and prevents unintended upward movement of a clothes rod. In addition, there is provided a breakaway shelf-retaining tab to hold a shelf of limited size in place while permitting use of a wider shelf which extends beyond the broken-away tab. Integral gussets further increase the strength of the wall bracket.

Abstract: The gear drive from the hand wheel to the chain drum includes a worm wheel coaxial with the chain drum. An idler shaft parallel to the plane of the worm wheel carries a worm engaging the worm wheel and a bevel gear. The hand wheel shaft is parallel to the chain drum shaft and carries a bevel gear engaging the bevel gear on the idler shaft. Between the worm wheel and the chain drum is a release mechanism which includes a release ring which when rotated about the axis of the chain drum is cammed to push a release plate into disengagement position. This release ring has a gear segment thereon which is engaged by a gear segment on a release actuating lever. In a modified embodiment this release lever also carries a cam which urges a brake shoe against a brake drum on the chain drum to apply a restraining force to the chain drum when the release mechanism is released.

Abstract: An electric motor drives a cam through one revolution during a corn popping cycle. One end of a pivoted lever bears against the periphery of the cam at its bottom to thereby hold the bottom cover of the popping vessel, secured to the other end of the lever, in place on the bottom of the popping vessel while the corn is being popped and to permit the cover to move away from the bottom of the vessel after it is popped thereby discharging the popped corn. A push rod riding on the top of the cam operates a measuring pocket at the start of the popping cycle to introduce a measured quantity of unpopped corn into the popping vessel at the start of the cycle. An arm extending from a side of the cam moves along a resilient tube filled with popping oil as the cam rotates to pump a measured quantity of oil into the popping vessel. The bottom cover of the popping vessel has a continuously energized heater which maintains the temperature of the cover above ambient but below the normal popping temperature.

Abstract: A sump motor is mounted in a section of pipe. The motor is a standard motor having special caps at each end of the motor shell and with the shell forming a waterproof enclosure. The caps have radially extending spacers extending out to the pipe. At each end of the pipe are reducers, the internal diameter of the small ends of which correspond to the external diameter of another, smaller standard pipe size. At the bottom a piece of pipe of the smaller size extends inwardly of the reducer to a location in juxtaposition to the pump impeller. Various connections and mounting arrangements may be made using standard sizes of pipe. In one embodiment the pump is mounted on a vertical track and positioned above a sump. When the water rises to a level in the sump at which pumping should commence, the motor is energized and the pump is lowered along the track into the sump.

Abstract: During manufacture of the draft gear and before it is inserted into the railway car, the piston is positioned in the cylinder in a preshortened position. Part of the fill of flowable, normally solid material is inserted into the cylinder about the piston rod to hold the piston in the preshortened position and the remainder of the fill is inserted between the piston and the closed end of the cylinder. The part of the fill inserted about the piston rod may be in the form of a collar or in the form of particulate material introduced through a port radially opposite the piston rod. This holds the piston in the preshortened position so that the draft gear can easily be inserted into the railway car. After the railway car is put into service the part of the fill about the piston rod breaks down and the piston returns to its normal operating position.

Abstract: An improved device facilitates pulling the fan or wheel from a drive shaft, the hub of the fan or wheel being normally secured to the shaft by one or more setscrews, the device circumscribing the hub and being positively secured thereto by bolts received in the setscrew holes in the hub.

Abstract: A pressure compensated, hermetically sealed transmission system is described which includes, basically, a hermetic rotary coupling. Rotary motion is applied through a casing, wherein a cylindrically shaped input shaft having a circular inner bearing race affixed to one end is coupled to a generally spherical shaped wobble plate by means of roller or ball bearings. In similar fashion, an output shaft is similarly coupled to the spherical shaped wobble plate at the opposite end. The inner races of the shafts are positioned at an angle and located eccentrically from the respective shaft center line. Both shafts are supported at their outer ends by combination journal thrust bearings, which are coupled to the main casing. The wobble plate is prevented from rotating about the common axis of the two shafts. Thus, as one shaft rotates, the wobble plate rocks, due to .[.ball.]. bearing action, but does not rotate. Likewise, due to the bearing action, as the wobble plate rocks the output shaft rotates.