Abstract: A method for manually assembling an inductor and calibrating it, and apparatus to facilitate practice of the method. Laminations are manually inserted into the ends of a hollow core of a wire-wound bobbin to build up a right hand stack of laminations and a left hand stack of laminations. Manual insertion of the laminations is facilitated by use of a stacking block which includes upright indexing posts to promote registration of the laminations. The left and right laminations are so stacked that an oversize air gap is included between the right hand stack and the left hand stack. After all the laminations have been stacked, the inductor is placed on a calibrator bed to facilitate calibration. The calibrator bed includes first and second sets of jaws which are closed along orthogonal directions under control of an operator. Closure of the first set of jaws brings the laminations into registration.

Abstract: The test head includes its own calibration device in form of a wire or a bore in front of the transducing surface so that a distinguishable calibration echo is always available.

Abstract: The grinding wheel and roll are particularly positioned to each other on the basis of parameters representing the local slope changes of the roll groove and its deviation from a semi-toroidal groove. The grinding wheel can be moved in two orthogonal directions, one being transversely to its normal orientation, but needs tilting therefrom while the roll is moved transversely to both directions. Digital control moves the parts into the desired positions.

Abstract: A hollow rivet and a setting mandrel are injection molded of thermoplastic material to form a single piece blind rivet or a blind rivet type foot of a fastener for moldings and the like. A draw shank and an enlarged head of the setting mandrel are interconnected by a break joint, and another break joint connects the mandrel with the surrounding tubular shank of the hollow rivet. Setting pull on the draw shank first ruptures the break joint between the mandrel and the hollow rivet, then sets the rivet, and finally ruptures the break joint between the draw shank and the mandrel head.

Abstract: A disk drive for one or more spinning disks has a voice coil motor, driving the transducer carriage and controlled by two feedback loops, respectively, for hold and seek modes and enabled by a microcomputer which is additionally inserted into the seek mode feedback loop. The microcomputer receives step pulses from a controller host as well as detent pulses through a path of that seek loop; the pulses serve as interrupts and the microcomputer selects digital speed signals on the basis of step and detect pulse counts. An a/d converter inserts that signal as command into the seek loop.

Abstract: The projector includes a housing with a projection path duct holding a dove prism and a mirror deflecting the path into a vertical axis. The beam in that path is intercepted by a tiltable mirror held in a rotatable disk. A transmission which includes bevel gearing, shafts and worm gears couples the tiltable mirror to a computer controlled motor for adjusting the elevation of the projection. Other transmission devices, including gears and worm gear, couple the disk to another motor to causing the projection beam to project in different horizontal directions. The projector is used to superimpose particular images upon a background image in a ship simulator.

Abstract: In a high-fidelity sound reproducing system wherein the speaker is located remotely from the amplifier and therefore the electrical signals reaching the speaker are subject to distortion from the capacitive and inductive reactance of the conductors joining the amplifier to the speaker, and further subject to pickup of hum and other forms of interference, the distortion of the signal is substantially eliminated by the use of a negative feedback network connected between the input terminal of the load and the input terminal of the amplifier and by a positive feedback network connected between the input terminal of the amplifier and the return terminal of the load, the feedback loops operating on the amplifier to alter its output in such a way that the signal applied at the terminals of the remote speaker more nearly resembles the signal applied as an output to the amplifier.

Abstract: A method for pressurizing an aerosol dispensing system with propellant in which a flexible inner container is inserted within a rigid outer container. The mouth opening of the inner container, having flexible means thereon, extends outwardly through the neck opening of the outer container with the flexible means supported by the neck opening. A dispensing cap is moved into engagement with the flexible means and the dispensing cap and flexible means are moved away from the neck opening while propellant is then injected through the neck opening into the region between the inner and outer containers. The dispensing cap is moved into the neck opening and crimped into engagement therewith to fix the position of the flexible means and inner container while maintaining a space between the neck opening and a portion of the exterior surface of the dispensing cap during crimping.

Abstract: The printer is provided for alternative use with long webs or individual, precut forms; it includes two friction roll drives adjacent to the print head and platen, and a sprocket drive upstream, being permanently engaged with a perforated web. The drives operate in synchronism but do not participate in all operations. Printing on the web is carried out after advancing the web by one form length and retracting it during stop and go printing. Switches control access to a bypass, the insert for a single form, and a receiver tray, into which any printed form drops.

Abstract: A skin construction suitable for use as a high temperature airfoil surface that includes a metallic member having first and second corrugations. The first corrugations have a size and spacing which permits resilient thermal expansion of the member in a direction transverse to the direction of the first corrugations. The second corrugations are positioned in a direction that is substantially transverse to the direction of the first corrugations and the second corrugations have a size and spacing which permits resilient thermal expansion of the member in a direction generally transverse to the direction of the second corrugations.An imperforate metallic surface is integral with the metallic member. Thermal stresses imposed on the skin construction are, thus, absorbed by deformation of the first and second corrugations which act as expansion joints in permitting controlled expansion of the skin construction.

Abstract: An engine driven shaft is connected to an input gear of the transmission which, in turn, is geared to a power branching cascade, providing either for axial branching first followed by lateral branching or a reverse sequence of branching, obtaining in either case four outputs provided by pinions which mesh in pairs two large spur gears for re-combining all branches. These large spur gears are on a common shaft which is the transmission output.

Abstract: An aircraft pallet is equipped with one or two telescoped pilot plates delineating maximum actual load overhang, to be not more than the roller track can handle.

Abstract: A single axis vehicle for an antenna mast can be positioned by means of three hinged, legs held against the equipment by means of chains whose effective length is individually adjustable by means of travelling nut-spindle assemblies to orient the mast by matching the hinge angle of each leg to the terrain.

Abstract: A process for recovering a viscous, combustible material, for example tar from a tar sand or oil and bitumen from heavy oil, from a sub-surface deposit of the material. The process comprises forming a substantially vertical main bore into the deposit and igniting the deposit adjacent the base of the bore. Such ignition may be carried out by any means, for example by burning a fuel, by an explosion or by a laser beam. Generally the ignition is assisted until such time as the material in the deposit is ignited. A supply of air is arranged to the ignition site so that a self-sustaining combustion takes place in the bore once the ignition is properly established. This combustion is supported by a natural draft generated by the combustion. The gaseous products of the combustion can leave the bore and the heat of the combustion and of the gaseous products of combustion as they leave the bore liquefy the material in the deposit.

Abstract: A bracket useful to form a free standing support on legs. The bracket comprises a cross piece to carry a platform. A pathway to receive a leg is positioned at each end of the cross piece. A sleeve is pivotally mounted on the pathway and extends when the bracket is in use, around a leg. A lever extends from the sleeve to permit pivoting of the sleeve to grip a leg positioned in the pathway and to permit the bracket to move up and down the leg. The free standing feature, together with ease of adjustment represents a considerable advantage.

Abstract: The corrugation is removed from an end portion of a helically corrugated tube, and an internally threaded sleeve is threaded onto the tube. The sleeve has an unthreaded extension which is being drawn by a suitable tool to engage the smooth wall portion of the tube and is subsequently welded thereto.

Abstract: An intelligent printer-plotter for use with a source of time-correlated digital systolic and diastolic blood pressure data and heart rate data receives, stores, analyzes, and edits the data, producing tables of data and graphs having a particular format. The charter smooths the data by a moving average technique and includes modes which permit the operator to edit the data manually or to command the charter to perform the editing automatically. In the automatic editing mode, the data are tested against pre-established criteria. Data not meeting the criteria is flagged so that it can be passed over in subsequent calculation and printing operations; however, the flagged data is not destroyed, but is retained in a memory to permit subsequent re-examination and to permit verification of the editing process.

Abstract: A coin selecting funnel for use in a coin-operated vending machine, for receiving coins inserted into the machine through a slot, for routing coins larger than a certain diameter into a descending a coin chute, and for routing coins smaller than that certain diameter into a coin return passage includes a trough having a wall and a ledge which interest along a vertex oriented so that inserted coins are conducted downwardly from a coin slot to a coin chute, the coins passing along the wall with their faces flush to the wall and their edges supported by the ledge. The wall contains an aperture having an upper edge extending parallel to the vertex of said trough and spaced from the vertex by a distance exceeding that certain diameter. The aperture also includes a lower edge extending parallel to the vertex and spaced from the vertex by a distance less than half that certain diameter.

Abstract: A caster pad permanently attachable to the underside of a receptacle to permit a caster to be quickly mounted to the receptacle by insertion into the caster pad and to be quickly removed from the receptacle by releasing it from the caster pad. In one embodiment, the caster pad employs no specialized parts but instead is formed from a single piece of sheet metal to which standard bolts are affixed for locking the caster into the caster pad. In addition to the bolts, the caster pad consists of a unitary piece of metal whose edges are bent out of the plane of its flat central portion to form flanges which help to retain the caster and which include threaded holes for attaching the bolts.

Abstract: A process for bonding together into a composite structure parts having different coefficients of thermal expansion by use of an adhesive which cures at a curing temperature different from the use temperature at which the structure is to be used, including the steps of applying the adhesive in an uncured state to the parts, then affixing the parts together rigidly at the use temperature to form the composite structure prior to during the adhesive, then curing the adhesive at the curing temperature while keeping the parts affixed together and simultaneously permitting the composite structure to change shape in accordance with the different coefficients of thermal expansion of the parts, the latter step being accomplished by holding the composite structure in a fixture which includes clamping plates which prevent twisting and buckling of the composite structure as its temperature is changed and in which the clamping plates are mounted so as to permit them to shift position to accommodate the bowing of the compos