Abstract: An immunoassay process for the detection of an antigen in a sample, which comprises: (a) forming a mixture of the sample with (1) a preformed complex of a primary antibody and a secondary binding macromolecule therefor, wherein the primary antibody is present at low concentrations and has substantial specificity for the antigen, the secondary binding macromolecule has substantial affinity for the Fc portion of the primary antibody, and the second binding macromolecule is affinity purified; and with (2) a detectably labeled form of the antigen; (b) incubating the mixture formed in step (a) for a time sufficient to allow the antigen and the detectably labeled antigen to competitively bind to the primary antibody of the preformed complex; (c) detecting the separated complex or the separated suspension medium.

Abstract: A folder for making Z-type folds in material as the material is fed therethrough, having a tongue creating slack in the material and a pair of folder blades cooperating to urge the slack material between the blades to form the fold as the material leaves the folder.

Abstract: A cationic charge modified microporous membrane, process for producing said membrane and use thereof are provided. The membrane comprises a hydrophilic organic polymeric microporous membrane and a charge modifying amount of a primary cationic charge modifying agent bonded to substantially all of the wetted surfaces of the membrane. The primary charge modifying agent if a water soluble organic polymer having a molecular weight greater than about 1000 wherein each monomer thereof has at least one epoxide group capable of bonding to the surface of the membrane and at least one tertiary amine or quaternary ammonium group. Preferably, a portion of the epoxy groups on the organic polymer are bonded to a secondary charge modifying agent selected from the group consisting of:(i) aliphatic amines having at least one primary amine or at least two secondary amines; and(ii) aliphatic amines having at least one secondary amine and a carboxyl or hydroxyl substituent.

Abstract: An apparatus for use with a sewing machine to automatically hem the free ends of tubular portions of garments. The apparatus has a guide cylinder with a stop and a tension cylinder capable of being retracted, both of which are mounted on the sewing machine with a folding guide which is moveable between a retracted position and an operative position. A tube connected to a source of compressed air assists in removing the sewn garment from the apparatus.

Abstract: A cationic charge modified microporous membrane is provided. The membrane comrises a hydrophilic organic polymeric microporous membrane having bonded thereto, through a cross-linking agent, a charge modifying amount of a cationic charge modifying agent. The charge modifying agent is an aliphatic amine or polyamine, preferably tetraethylene pentamine, and the cross-linking agent is an aliphatic polyepoxide having a molecular weight of less than about 500, preferably 1, 4 butanediol diglycidyl ether. The microporous membrane is preferably nylon. The process for applying the charge modifying agent to the membrane, preferably comprises contacting the membrane with an aqueous solution of the charge modifying agent and then contacting the membrane with a substantially aqueous solution of the cross-linking agent. The preferred process uses high purity water, i.e.

Abstract: A natural bovine serum-derived serum which has low lipid levels and may additionally have similar globulin and albumin profile as fetal calf serum, as well as controlled levels of hemoglobin, enveloped viruses, steroid hormones, mycoplasma, cholesterol, triglycerides and pesticides, is useful for the promotion of growth of animal and plant cells in tissue culture.

Abstract: A timing mechanism for use in an appliance such as a domestic clothes dryer, for example. The mechanism includes a synchronous motor and two output shafts. One output shaft is the conventional rotary output shaft of the speed reducing gear train associated with the synchronous motor. The second output shaft is the rotary axle of a Geneva follower gear that is driven by a Geneva driver gear that is in turn driven by a gear located intermediate the input and first output shaft of the gear train. The intermittent rotation of the second output shaft, wherein each intermittent rotation is accomplished in a relatively rapid time, permits a timing cam thereon to control a switch actuator to provide a precise and quite brief switching action of the order of five seconds, for example.

Abstract: A motor for driving a rotary drilling bit within a well through which mud is circulated during a drilling operation, with the motor being driven by a secondary fluid which is isolated from the circulating mud but derives energy therefrom to power the motor. A pressure drop in the circulating mud across a choke in the drill string is utilized to cause motion of the secondary fluid through the motor. An instrument which is within the well and develops data to be transmitted to the surface of the earth controls actuation of the motor between different operating conditions in correspondence with data signals produced by the instrument, and the resulting variations in torque in the drill string and/or the variations in circulating fluid pressure are sensed at the surface of the earth to control and produce a readout representative of the down hole data.

Abstract: A vaulting board is fastened at one end to a frame and slopes up under the action of two spaced apart, concave upwards, leaf springs carrying rollers on each end which contact the under side of the board. The spring centers are clamped in assemblies carrying transverse shafts at the bottom and the curved ends of J-bolts fit around the shafts and are connected to the frame, so that the springs pivot about the shafts axes under vaulting impact to equalize the stresses impressed in the board by the spring ends.

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: 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: 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: 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.