Abstract: A radar loaded, hollow yacht mast is disclosed which is pivoted at the bottom to the deck by a tri-sectioned elastomeric torsion spring hinge assembly in which the torsion is produced by relative rotation between the inner section and the two outer sections. The torsional resistance of the hinge assembly prevents the mast from falling when the bolts and stays are removed and the restoring force in the spring elastomer when the mast is pivoted flat to the deck assists in raising the mast back into its upright position. A hollow, flanged mounting connecting the hollow mast to the movable section of the hinge assembly prevents sea water from entering the hollows. Provisions are provided for pre-loading the hinge spring with a torsional stress in either direction when the hinge is closed.

Abstract: This invention relates to automatic gain control (agc) circuitry and more particularly to circuitry for supplying respective automatic gain control signals to an amplifier that repeatedly receives a given sequence of signals. Each one of the signals in each sequence is sampled and compared with a reference voltage in a respective feedback loop. The respective agc loops are coupled to the amplifier in a predetermined sequence to control the gain of the amplifier in a desired manner. The steps in this predetermined sequence are initiated by an external trigger and by the receipt of the signals to be controlled.

Abstract: A throat plate of a sewing machine with a feed plate is provided with disc type bearings retained in fixed position adjacent to the needle hole of the throat plate to support and provide low friction surfaces in contact with the feed plate.

Abstract: A well instrument is isolated from the high temperatures of a surrounding earth formation by enclosing the instrument within a heat insulative jacket structure, preferably a dewar having spaced walls with a vacuum therebetween, with a heat sink contained in the jacket above the instrument assembly, and with a heat pipe extending upwardly from the instrument assembly to the heat sink and containing a fluid which by evaporation at a lower point and condensation at a higher point will conduct heat upwardly from the instrument assembly to the heat sink but not downwardly therebetween. The heat pipe preferably projects upwardly beyond a top portion of the insulating jacket to the location of a convector element which is exposed to the temperature of fluid or air at the outside of the insulating jacket to transmit heat from within the jacket to its exterior but not in a reverse direction.

Abstract: The battery assembly is housed in the casing of the flashlight so as to be axially slidable therein, whereby the displacement of said assembly in one direction closes the electrical circuit comprising the bulb, and the displacement in the opposite direction opens said circuit. A pushbutton radially extends from the flashlight casing. The said pushbutton is provided with a cam-shaped portion cooperating with an axially slidable cam follower to transmit the axial displacement to the battery assembly.

Abstract: Method and apparatus for nondestructively testing each incremental area of a ferromagnetic sample by first passing a steady magnetic flux field through an area in a first direction and producing an inspection signal in response thereto, and then passing a steady magnetic flux field through the same area in an orthogonal direction and producing a second inspection signal in response thereto. The magnitudes of the two inspection signals corresponding to a given incremental area are added to produce a composite signal whose magnitude is the sum of the two signals. The composite signal associated with a given incremental region is displayed on a visual presentation means at a location corresponding to the location of the incremental region on the ferromagnetic sample and with an indicia, such as color, that is a function of the magnitude of the respective composite signal.

Abstract: An instrument including a gyroscopic rotor mounted to precess about a predetermined axis in response to pivotal movement of the rotor about a sensing axis, with the rate of precession being measured and being utilized to determine the amount of said pivotal movement above the sensing axis. Two or more such rotors precessing about different axes can respond to different components of the earth's rotational movement, or to other component movements or torques. Differences in the rates of precession of the two rotors indicate the relative strengths of the corresponding components of the earth's movement, and afford a basis for deriving an indication of azimuth.

Abstract: In a method of and apparatus for top stitching parallel to the edge of a garment panel in which edge is a corner, there are provided means for detecting the approach of the corner and thereupon reducing the speed of movement of the panel through the machine and means acting on the underside of the panel to impart a turning motion thereto.

Abstract: An adjustable hydraulic exerciser having multiple stations with each station being adapted for multiple exercises.

Abstract: Method and apparatus for tri-axially aligning, folding, trimming and edge stitching a cloth sheet particularly adapted for making pockets for garments.

Abstract: A miniaturized electromagnetic relay having a yoke-coil-armature-return spring assembly and contact bearing blades arranged to be inserted into an insulating monolithic supporting structure. The support structure is formed by a front wall and a partition wall perpendicularly projecting therefrom for separating the front wall into two portions, with one of said portions being effective to receive the yoke-coil-armature assembly and the related return spring, and the other portion being effective to receive the contact bearing blades.The partition wall is provided with a C-shaped cross-section having guiding and supporting means for said yoke-coil-armature assembly and related return spring. The upper portion of the front wall is provided with two sets of slots separated from one another by a partition member for receiving the contact bearing blades therein.

Abstract: A monitoring system for continuously monitoring the ground conductor of an electrical cable having power conductors and a pilot wire in addition to the ground conductor. An a.c. test signal is connected onto a loop comprised of the ground conductor and pilot wire and a terminating impedance. A current transformer samples the test signal on the ground conductor and checks its magnitude. By making the transformer impedance considerably lower than the mutual inductance between the ground conductor and pilot wire, large, expensive blocking impedances are not required to prevent the test signal from following sneak paths from the test loop to earth ground.

Abstract: A defrost control system is provided for initiating one or more (defrost) timing cycles each at a preselected different time and for terminating the cycles at the end of their respective predetermined (defrost) periods. The unit generally includes a solid-state, microprocessor based, programmable twenty-four hour timer, and a display panel having an electrooptical digital time display and two sets of defrost status/program indicators. The two sets of defrost indicators are separately or concurrently activated to visually present a display indicative of a plurality of program and operating status events, for example, the occurrence of an automatic or manual defrost initiation.

Abstract: In a twin needle tacker in which one needle/bobbin assembly is movable relative to the other to change the space between the tacks, a feed plate assembly and a throat plate assembly each having one plate movable relative to the other for realigning the slots of the feed plate assembly and the needle holes of the throat plate assembly with the needles; and a twin knife mechanism operatively interconnected having a first cutting means mounted on the bottom of one throat plate and the other cutting means mounted on the bottom of the other throat plate.

Abstract: A proofer tray assembly with a circular cup having a stepped configuration providing a series of substantially horizontal annular surfaces forming ledges for retaining a dough release agent such as sifted flour or sprayed oil.

Abstract: A sealing assembly for use in a geophysical cable connector having two interconnecting bodies each having a plurality of coacting electrical connectors and a cover connected to each body by a plurality of screws. A bladder gasket is positioned between each body and each cover with a plurality of openings around the outer periphery for receiving the screws. The gasket includes a sealing ridge extending outwardly from one side of the gasket entirely around the gasket and spaced inside the opening. Each body includes a recess inside of the screws for receiving the sealing ridge. The gasket is enclosed inside of the ridge for sealing the interior of the body from the environment. The sealing ridge may be semi-circular shaped or trapezoidal shaped in cross section.

Abstract: A defrost control system is provided for initiating one or more (defrost) timing cycles each at a different time and for terminating the cycles at the end of their respective predetermined (defrost) periods. The unit generally includes a solid-state, microprocessor based, programmable twenty-four hour timer, and a display panel. The system also includes a proportional defrost module which measures the absolute humidity of the atmosphere and adjusts the defrost initiate time(s) in accordance therewith.

Abstract: A novel polymer alloy coating is provided consisting essentially of polyphenylene sulfide and an amount of polyimide. The polyimide is produced by the crosslinking and curing of an acetylene terminated aromatic polyimide oligomer resin. The amount of polyimide utilized is sufficient to enhance the adhesiveness of the polyphenylene sulfide to a metal substrate without substantially changing the melt flow properties, chemical resistance and thermal stability of the polyphenylene sulfide. A polymer alloy resin composition is also provided for application to the metal substrate to produce the polymer alloy coating. The novel polymer alloy coating is particularly suitable for coating pipes, particularly pipe couplings for oil and gas well production pipes which are exposed to extreme temperatures, pressures and corrosive environments.

Abstract: Apparatus in conjunction with a twin needle tacker to facilitate loading and simultaneously tacking both ends of a rear or hip pocket opening.