Abstract: A predetermined symmetrical pattern is sewn on a canvas by applying a flexible adhering sheet having printed thereon indications of a gridwork corresponding to the gridwork of the canvas. The flexible sheet is of substantially smaller area than the canvas and indicates STITCHES and paths to be followed. The edges of the flexible sheet gridwork are aligned with the canvas gridwork while they are joined together. The canvas is then sewn with a first set of stitches to establish paths and STITCHES illustrated by the paths on the flexible sheet. The flexible sheet is removed and a second set of stitches is sewn to complete the paths established by the first set of stitches.

Abstract: A scoop car particularly adaptable for handling a mineral, such as coal, after it has been loosened and piled in a mine wherein the scoop car is provided with movable support wheels. The disclosed scoop car is moved by a traction or towing vehicle. The scoop car is connected to the traction vehicle by a pin or pivot connection to provide good maneuverability when moving to the unloading area. During loading of the vehicle, however, when the scoop car is pushed into the pile of material to be transported it is necessary to prevent movement around the pivot connection so that jackknifing does not occur. Restricted movement around the pivot is accomplished by a bolster mechanism which contacts both the traction vehicle and the scoop car keeping their longitudinal axis aligned. The bolster mechanism also forces the rear of the scoop car downward so that the scoop car is not pushed upward during loading.

Abstract: Apparatus for generating synchronized multi-axis intermittent motion utilizing electronic encoding, memory and a servo controlled positioning system. A plurality of mechanically independent slave shafts are positioned in response to the position of a rotatable master shaft. An analog transducer is attached to the master shaft providing an analog output signal which is fed through an analog-to-digital converter. A digital representation of the master shaft position is provided by the analog-to-digital converter. The digital indication of master shaft position is fed to a plurality of independent digital memory devices each of which provides, in response, a digital position signal indicative of the desired position of an associated slave shaft. The output of each independent digital memory device is fed to a digital-to-analog converter which provides an analog output representative of the desired slave shaft position. A servo controller positions the associated slave shaft in response to the analog signal.

Abstract: A speed detector, particularly useful on a permanent magnet DC motor, for providing a pulse indication from movement of the rotor teeth. During one revolution of the motor, a pulse is provided for each motor tooth. In a preferred embodiment, the pulse pickup probe is formed from a ferromagnetic stud which is anchored to the stator housing and extends through an opening formed in the center of the fixed permanent magnet to a position in close proximity to the rotor. The magnet through which the probe extends provides magnetic flux having a path through the stud and the rotor. The reluctance of the flux path through the rotor varies as a function of the alignment of a rotor tooth with respect to the ferromagnetic stud. The stud is formed to have a pickup end facing the rotor. The diameter of the pickup end is slightly greater than the rotor tooth width. A pickup coil is wound around a reduced diameter portion formed on the ferromagnetic stud, and generally lies within the opening through the permanent magnet.

Abstract: A locking device for the pedals of a motor vehicle is comprised of a first rigid support with a first rigid bar mounted at one end to the first support and perpendicular thereto. A second rigid bar is mounted at one end thereof to the first rigid support and in spaced relation and parallel to the first rigid bar. A second rigid support is mounted to the other end of the first and second rigid bar and parallel to the first support. At least and preferably one of the above elements are positionably removable. A locking means is provided to lock the positionably removable element or elements and fix the position of the structure.

Abstract: Apparatus for the traversal of an air boat or hovercraft over river dams consisting of a two-sided ramp having an upper and lower end. The ramp is constructed in a river extending over a dam. The upper end of the ramp is located upstream of the dam and the lower end of the ramp is located downstream of the dam. Both the upper and lower ends of the ramp are at least partially submerged to permit easy access by a hovercraft. The angle of intersection of the lower end of the ramp with the water, of the upper end of the ramp with the water, and of the upper and lower ends of the ramp is made large enough so that a commercial hovercraft can traverse thereover. In one embodiment of the invention, side flanges are provided extending along the ramp to prevent an air boat once upon the ramp from passing prematurely to either side.

Abstract: An amine salt is comprised of the reaction of pelargonic acid and dicyclohexylamine. The amine salt, dicyclohexylammonium pelargonate, is useful for inhibiting metal corrosion. A polyphosphate may be used in conjunction with the amine salt to obtain a synergistic corrosion inhibiting effect when a saline environment is encountered by the metal to be protected.

Abstract: Isolating apparatus is disclosed which provides electrical isolation between an analog signal input and an equivalent analog signal output. The input analog signal is converted to a series of positive and negative pulses. Optical coupling devices are responsive to the series of positive and negative pulses for providing a series of similar positive and negative pulses which are electrically isolated but optically coupled. These isolated pulses are then converted to the equivalent analog signal output. The optical coupling comprises photo emitters one of which is activated when the analog to pulse converter output is positive and another of which is activated when it is negative. The photo emitters are operably associated with photo detectors which are operable in a switching mode. Feedback is not required around the optical coupling devices. An averaging circuit at the output provides an analog representation of the input signal.

Abstract: A water scoop constructed for use in conjunction with the scoop bucket of a rubber tired self-powered mining vehicle for collection, transporting and discharging water. The disclosed water scoop is constructed to engage the discharge blade on the scoop bucket so that when it is to be used it can be drawn into the bucket. The water scoop is a generally closed vessel having a configuration to fit in the scoop bucket. Vents are provided in the top rear portion of the water scoop to allow trapped air to escape as the water scoop is filled. A relatively large gate is provided across the exposed end of the water scoop and it is positionable to allow the passage of water. The gate of the bucket can be operated by a hydraulic cylinder which is powered by the hydraulic power unit which operates the scoop discharge blade. During use with the water scoop drawn within the scoop bucket, the hydraulic attachments to the blade operating cylinders are disconnected and attached to the hydraulic gate cylinder.

Abstract: A combined accelerator and brake assembly is adapted to be used on self-propelled rubber tired vehicles which have accelerator and brake actuating means either side-by-side or on opposite sides of the vehicle operator. The self-propelled rubber tired vehicle or tractor is often used in underground mining operations. The combined accelerator and brake assembly means is comprised of a mounting plate which holds the assembly and can be bolted onto the tractor or vehicle chassis. Two bearing supports with accompanying bearings are attached to the mounting plate through which a shaft is supported. A coaxial member extends the length of the shaft between the bearing supports and has bearings at the opposing ends thereof for engaging the shaft.

Abstract: An elongated shuttle car is provided having a set of undriven rail wheels and a set of driven road wheels. The rail wheels are movable between a lowered position wherein they support the shuttle car and a raised position wherein the shuttle car is supported from the road drive wheels. The road drive wheels are independently driven by fluid drive motors, one of which is associated with each road wheel. The road wheels are disposed so as to permit movement of the shuttle car generally perpendicular to its longitudinal axis which is aligned with the rail bed. Hydraulic cylinders or jacks are utilized for raising and lowering the undriven rail wheels which are normally formed of steel. The rail wheels are supported in movable truck assemblies. The movable truck assemblies have an axle permanently attached thereto and a pair of rail wheels are attached to the ends of the fixed axle.

Abstract: A two-speed resolver system wherein the rotor of a fine brushless resolver which is directly connected to the shaft to be instrumented is connected to the rotor of a coarse resolver so that the rotor ofthe coarse brushless resolver rotates at a proportional but different rate than the fine resolver and the electrical output of the fine resolver which represents the position of the input shaft is fed to the electrical input on the coarse resolver and combined with the mechanical input to the coarse resolver to provide a signal out of the coarse resolver which indicates a predetermined fraction of angular rotation for each revolution of the rotor of the fine resolver. The disclosed two-speed resolver system utilizes brushless resolvers wherein the electrical connections to the rotors are through brushless rotary transformers. Two gears having a different number of teeth can be used to couple the rotor of the fine resolver to the rotor of the coarse resolver.

Abstract: A two-stroke engine having an improved piston construction which reduces friction and wear between the piston and the cylinder wall, thereby providing cooler operation at any selected speed. The decreased wear increases piston life. The piston skirt, which is substantially parallel to the cylinder wall during normal operation, has a plurality of circumferentially spaced openings formed therethrough. These circumferentially spaced apart openings or holes, which are of a relatively small cross-sectional area compared with the area of the ports, are aligned with vertical continuous portions of the cylinder wall. The openings of the inlet, outlet, and transfer ports are located between the vertical continuous portions or ribs of the cylinder. The piston is disposed within the hollow inner portion of the cylinder for relative reciprocating motion. The openings in the cylinder skirt are aligned to move along the vertical ribs.

Abstract: A scaffolding arrangement is provided having removable bottom supports and adjustable outriggers for assembling the insulation and inner membrane of a liquefied natural gas (LNG) tank. A structural steel base is provided from which the scaffolding is supported. The structural steel base is supported from the bottom of the LNG vessel by adjustable screw jack supports. The inside of the LNG vessel is coated with various layers of insulating and support material and a final inner layer or membrane of stainless steel is provided over the insulation and other associated material. Any screw jack support can be removed, when adjacent screw jack supports are in place, allowing installation of the insulation and membrane in that area. Vertical supports are provided throughout the inside of the LNG vessel above the structural steel base. A plurality of horizontal spaced apart levels are formed within the LNG vessel to divide the inside of the vessel into a plurality of work platforms.

Abstract: A portable scale is provided, to be used in conjunction with the jack tube on a trailer hitch, to provide trailer tongue weight. The tongue weight scale is constructed to accept the trailer tongue support and guide it directly onto a weighing device. The scale is formed with an elongated housing surrounding the jack tube guide and a weighing device. The jack tube guide receives the trailer jack tube and guides it onto the weighing device. The jack tube guide is formed to have an inner dimension just slightly larger than the outer dimension of the jack tube so that during a weighing operation when a load is applied from the jack tube to the weighing device, the jack tube guide sleeve functions to maintain alignment and keep the scale and jack tube together. A scale, disposed on the outside of the elongated housing, operates in conjunction with an indicator connected to the weighing device, to provide a visual indication of the trailer tongue weight.

Abstract: A fishing lure is comprised of a hollow semi-rigid body of uniform wall thickness formed from a plastic tube. The lure has a head which is removably mounted to the body. A hook is provided within the body and in alignment with an aperture in the body. When a fish strikes the lure, the body collapses and exposes the hook to impale the fish thereon.

Abstract: A portable self-contained scoreboard adaptable for use with a variety of different sports. The self-contained scoreboard has a plurality of variable numeral displays. Some of the numeral displays are constructed to function as a controllable clock which can count up or count down. The clock numerals can also be manually controlled to be used to indicate other desired information. A plurality of descriptive placards are provided with the self-contained portable scoreboard. The placards are constructed to be attachable to the face of the scoreboard. Selected placards can be attached to the scoreboard to render the scoreboard face applicable for scoring a variety of sports. The numeral and indicator light controls are then selected to be in accordance with the placard modified scoreboard face for use with the desired sport. This permits the scoreboard to be adaptable for use with a wide variety of sporting events. A pair of indicating timers adapted for use with the scoreboard can also be provided.

Abstract: A protective device is comprised of a rigid cup having sufficient volume to enclose the male genitals. A resilient padding is mounted on the edge of the cup and is adapted to contact the lower body. The resilient padding absorbs impact experienced by the cup. The resilient padding on the cup edge engages the body proximate to the superior ramii, the inferior ramii and the Ischial ramii of the pelvis with minimal contact with the interior upper thighs. The protective device so constructed causes impact experienced by the cup to be absorbed by the padding and the aforementioned portions of the pelvis.