Abstract: A fused electrical plug including a plug body having a pair of forwardly projecting conductor prongs for insertion into a socket. A pair of conductors entering the plug are connected to respective conductor prongs through fuses which are removable by opening an access door on a lateral face of the plug body. A locking plate slides along the prongs of the plug and locks the access door in its closed position when the locking plate abuts the forward end of the plug body. In a first and second embodiment the access door includes an access cover extending between two parallel side walls. The inside face of the access cover contains a pair of inwardly projecting fuse holders which insert the fuses in their proper position inside the fuse body when the access door is closed. In the first embodiment the access door pivots away from the plug body about a transverse edge of the access cover, while in a second embodiment the access door slides away from the plug body in a lateral direction.

Abstract: A synergistic safety system is incorporated in a crane driven by a high-speed motor which requires both an energy-absorbing torque-limiting device in the speed reduction unit and a drum emergency holding device. The energy-absorbing torque-limiting device transmits the static and dynamic torque required to rotate or hold the drum against the maximum carried load, but will slip at a pre-determined setting to absorb high-speed rotational energy of the drive train and/or torque of the drive motor in the event a two-blocking, load hang-up, overload, or engagement of the drum emergency holding device occurs. The drum emergency holding device is set automatically when the energy-absorbing torque-limiting device is actuated and/or any drive train component fails, which are detected by one or more sensing sub-systems.

Abstract: A solar heat roofing system including a plurality of waterproof heat absorbing panels covering substantially the entire roof of a building. The panels are formed by a pair of waterproof sheets connected to each other by elongated spacers thereby forming a plurality of fluid channels extending between the ends of the panels. A plurality of upstanding, spaced apart glazing mounts extend along the upper surfaces of the panels parallel to the spacers, and a plurality of elongated glazing supports are positioned between the glazing mounts. The glazing mounts and supports are positioned such that they follow a regular pattern when adjacent panels overlap each other. Transparent or translucent sheets are then placed in the glazing mounts with the upper surface of the glazing support contacting the underside of the sheet. The transparent or translucent sheets provide a "greenhouse effect" to increase the heat absorption of the panels, and they provide protection for the panels.

Abstract: A stimulator for causing involuntary mandibular closure. In a "test" mode a constant voltage is applied to left and right electrode circuits, and the currents through the electrode circuits are measured to determine electrode circuit conductivity. A first comparator circuit flashes respective "open" circuit warning lamps if the current through either of the electrodes is less than a preset value, and it flashes a "good" connection indicator lamp if the current through both electrodes is greater than the preset value. A second comparator circuit determines if the current through one electrode exceeds the current through the other electrode by a preset value, and flashes respective "low" current warning lamps in response thereto.

Abstract: A semi-automatic firearm having a slide axially movable with respect to a frame between a forward battery position where the firearm is discharged, and a full recoil position where the spent cartridge is extracted and a new cartridge is subsequently loading. Either a pair of oppositely wound, concentric springs or a flat helical spring extends between the slide and the frame to form a recoil mechanism which resiliently biases the slide toward battery. The slide partially surrounds a barrel which is pivotally secured to the frame toward its rear end through a link. The slide contacts the barrel at a point diametrically spaced from the link when the slide is in battery thereby resiliently biasing the barrel in a forward direction which imparts a rotational moment to the barrel about the pivot axis of the link. The rotational moment forces the front end of the barrel downwardly against two distinct support areas on the slide.

Abstract: A venting valve connected to the interior of the fuel tank has a sliding piston and a plurality of springs which hold the piston in different operative positions dependent upon the amount of pressure within the tank.

Abstract: A band saw machine is provided with a cutting head that carries the endless saw blade. The cutting head can be swung from a vertical cutting plane into a horizontal cutting plane. Limits can be made in the feeding stroke of the cut and the return travel. A workpiece feeding and clamping vice is rotated about a horizontal axis. The combined positioning capability of the band saw blade and the workpiece vice allows difficult compound angular cuts to be made in the workpiece. The endless run of the blade is angled upwardly and outwardly away from the workpiece to provide additional clearance for cutting deep workpieces. Powered feed rolls advance the workpiece against a gauging stop to determine a predetermined length to be cut. The vice is then closed to hold the workpiece during cutting. Supplemental supports hold the rearward end of the workpiece during feeding and cutting. Blade guides are spaced for accomodating both small and large width blades.

Abstract: A visual approach system for indicating the glide slope and course of an aircraft to a runway. The system includes a plurality of light beam generators of various colors enclosed by tubular light shields for precisely controlling the divergence angles of the beams. The angles of the shields with respect to each other and the runway are precisely controlled to generate an accurately positioned glide slope and course to the runway. In one embodiment a center light beam of a first color has an axis extending along the glide slope and course to the runway. In one embodiment a center light beam of a first color has an axis extending along the glide slope and course to the runway. A first pair of different colored beams extend along the top and bottom of the center beam for indicating deviations from the glide slope, and a second pair of different colored beams extend along opposite sides of the center beam for indicating deviations from the course to the runway.

Abstract: A platform is inclined relative to the ground to support and close the open housing of a rotary lawn mower. A feed inlet is provided in the platform with a guide chute for directing twigs and lawn clippings upwardly into the housing. A shear bar is provided for coacting with the rotary mower blade to chop the materials inserted. Adjustable wheel mounts and housing closure aprons are provided to adjust the platform for various sized lawn mowers.

Abstract: Dry powder mix is mixed with water in accurate amounts on demand, the water and powder pass through an axial passage of a mixing rotor and must pass radially outward in a mixing bowl through a narrow gap to a tangential discharge opening. Demand is determined by startup and continuous operation level sensors arranged to maintain accurate and limited levels of mixed product in the freezing cylinder.

Abstract: A heat exchanger heats fresh air moving to a product dryer by running the fresh air around hot exhaust tubes which are discharging from the dryer. Detergent sprays may be positioned to direct cleaning fluid into the tubes. The fresh air is introduced into a pre-dryer through pipes having nozzles which are at 30.degree. angles to the product path.

Abstract: The apparatus includes a reciprocative side edge jogger for aligning the side edges of multiple sheet stacks in a column through movement with respect to the sheet side edges along a rectilinear path perpendicular thereto. The apparatus additionally includes a movable end edge jogger. The sheets are aligned against side and end edge backstops, which respectively oppose the side and end edge joggers. In one preferred embodiment, the side and end edge joggers are driven by a single motor. In a second preferred embodiment, the side and end edge joggers are driven by separate motors.

Abstract: A stationary or portable conveying system for conveying particulate dry products is disclosed. The conveying apparatus is 100% air operated, with few moving parts, and requires no electric controls, no rotary valves and no timers. The apparatus disclosed includes a storage vessel provided with product intake and discharge openings. The valving associated with the storage vessel automatically operates alternately to admit product to the storage vessel during an intake cycle and, when the storage vessel is full, to automatically shift to a discharge cycle to unload the product from the storage vessel. A valve mounted to the vessel near the top detects the level of product in the vessel. The valve includes a generally cylindrical body having a central bore communicating with a plurality of ports. A longitudinally displaceable valve stem is mounted in the bore and is spring biased to project beyond one end of the valve body.

Abstract: A fixture for holding V-type engine blocks during cylinder honing or other refinishing operations has a stationary stand assembly and a removable clamping assembly which can be applied to an engine block at a location remote from the stand assembly and presents a lifting eye so that the clamping assembly and engine block can be hoisted as a unit, transported and lowered into the stand assembly whereupon the clamping assembly can be selectively pivoted from side to side and locked to vertically present the selected bank of cylinders.

Abstract: A microprocessor for executing computer programs which have been enciphered during manufacture to deter the execution of the programs in unauthorized computers. This microprocessor deciphers and executes an enciphered program one instruction at a time, through a combination of substitutions, transpositions, and exclusive-OR additions, in which the address of each instruction is combined with the instruction. Each unit may use a unique set of substitutions so that a program that can be executed in one microprocessor can not be run in any other microprocessor.

Abstract: A load disc having an annular flex plate connected to a pair of parallel mounting plates through respective support rings. The support rings are of unequal diameters so that compressive or tensile forces applied to the mounting plates cause the flex plate to spherically deform. The deformation of the flex plate produces tensile and compressive strains on opposite faces of the flex plate which are measured by strain gauges mounted on opposite faces of the flex plate. The flex plate is recessed away from the support rings at the points of attachment thereto so that the support rings intersect the flex plate at its neutral plane. Consequently, spherical deformation of the flex plate does not tend to expand or contract the support rings thereby allowing freer deformation of the flex plate and desensitizing the flex plate against lateral forces applied between the mounting plates.

Abstract: A boosting device including a thin, cylindrical shell of high explosive, such as PETN, which may be formed by a spiral wrap of detonating cord. The shell is formed around an inert core which is either a solid cylindrical body, a hollow cylindrical body or a web-like structure having radial spokes or a hollow center. Detonation of the shell is initiated at one point on the shell, and the detonation proceeds along opposite sides of the cylindrical shell to a point diametrically opposite the initiation point where the detonation fronts meet thereby producing a shock reinforcing effect. The shock reinforcing effect allows a relatively small amount of explosive to initiate even low sensitivity blasting agents.

Abstract: A compact cooking stove including a combustion area partially surrounded by a wind screen having a side opening which faces the wind to direct air to the burning fuel. An exhaust opening is formed adjacent a cooking pan placed at the top of the wind screen so that hot exhaust gases from the burning fuel pass upwardly toward the pan. In a first embodiment heat is supplied by a generally cylindrical burner plate including a recessed, central portion forming an alcohol fuel dish surrounded by a fairly broad rim. A plurality of pot-supporting tabs project upwardly from circumferentially spaced points about the rim to support a cooking pan above the fuel dish and rim. Heat from the burning fuel imparted to the bottom of the pan is radiated to the rim of the burner plate to heat the fuel in the fuel dish in order to promote vaporization of the fuel which increases the heat generated by the stove.

Abstract: Bait is held to the hook by a loop portion of the leader formed by slidably securing the free end of the leader to the shank of the hook and running the opposite end through the eye of the hook. Beads are placed on the loop portion for pressing against the bait to hold it against the shank of the hook. Beads with rubber or other friction material are held on the leader outside of the hook eye such that the leader can be pulled tight to close the loop portion and be held snugly by the friction beads. Other lure material, spoons, weight, etc. can be added to the lure for producing the desired action.

Abstract: A metering device for delivering a fluid at a predetermined rate and a mixing device for delivering first and second fluids at a predetermined rate mixed in a predetermined ratio. The devices include a flexible fluid bladder having flexible inlet and outlet conduits, a flexible inlet conduit clamp tube overlying the inlet conduit, and a flexible outlet conduit clamp tube overlying the outlet conduit, all of which are positioned between a pair of abutting rigid plates having matching voids. As each of the clamp tubes are pressurized, the inlet or outlet conduits over which they lie are collapsed to prevent fluid flow therethrough. A valve system is provided for alternating between a fill cycle wherein the outlet conduit clamp tube is pressurized and the inlet conduit clamp tube is depressurized to allow fluid to flow into the fluid bladder, and a discharge cycle wherein the inlet conduit clamp tube is pressurized and the outlet conduit clamp tube is depressurized to allow fluid to flow from the fluid bladder.