Abstract:
Conjugates of antibodies and lactate oxidase, linked together by linker molecules, which are designed for therapeutic purposes. The bacterial lactate oxidase linked to an antibody produces the cytotoxic substance hydrogen peroxide at the site of action as dictated by antibody specificity.
Abstract:
A voltage regulator for an internal combustion engine having a permanent magnet alternator and utilizing an SCR/diode bridge rectifier (13) includes crowbar SCR overvoltage protection means. To assure that the crowbar SCR (45) has an adequate period in which to cool off after being triggered on by an overvoltage surge, crowbar SCR operation is detected to generate a control signal to activate a timer (42) which shuts off gate drive to the main bridge SCR's (25, 26) and thereby shuts down the bridge (13) for a period of time sufficient to provide crowbar SCR (45) recovery and cool off. In its preferred embodiment, the control signal is provided by the crowbar SCR (45) gate to cathode voltage drop during protective operation, which signal is of relatively long duration, thus allowing the use of filters (56) to eliminate spurious triggering of the timer (42) by transient noise signals. Feedback from the switch means (32) supplying gate drive to the bridge SCR's (25, 26) is used to provide a tapered charging characteristic. Temperature detection of the mounting base temperature of the semiconductors in the SCR/diode bridge (13) may be used to shut off the gate drive to the main bridge SCR's (25, 26) to prevent excessive temperature rise of the semiconductor junctions.
Abstract:
A two cycle internal combustion engine is provided with a fuel system including a low pressure fuel pump (204) and solenoid valve (206) supplying and metering fuel to the engine crankcase through a fuel line, without a carburetor, without a high pressure fuel pump, without high pressure fuel injectors, and without a constant fuel pressure regulator. The system senses the amount of combustion air supplied to the engine, and senses fuel flow velocity using a restriction orifice in the fuel line producing a fuel pressure drop indicating fuel flow velocity. A conduit is connected between the crankcase at a transfer passage and the fuel line downstream of the restriction orifice and passes warm pressurized air-fuel mixture from the crankcase through the transfer passage to the fuel line to improve fuel atomization.
Abstract:
A marine propulsion unit (10) has a depending gearcase (12) with one or more water inlet openings (22) in the sides of the gearcase for supplying water to a water pump (20), and an auxiliary water inlet opening (32) at an anti-ventilation plate (30) above the propeller (14) for supplying additional water to the water pump (20). The water passage (42, 50) from the auxiliary water inlet opening (32) to the water pump (20) has a portion (44, 52) extending downwardly below the level of the auxiliary water inlet opening (32) and communicating with the side water inlet openings (22). When the side water inlet openings (22) are below the water line and the auxiliary water inlet (32) is above the water line, water is received in the downwardly extending portion (44, 52) of the second passage (42, 50) and blocks air from flowing from the auxiliary inlet opening (32) to the water pump (20), to prevent engine overheating.
Abstract:
A marine drive unit (1) includes a lower gear case (8) forming a torpedo housing (9). A pair of coaxial propeller shafts (21, 25) are rotatably mounted in the housing and carry a pair of propellers (10, 11) thereon. The propeller shafts are driven by a pair of opposed driving gears (16, 24) suitably connected through a generally vertical main drive shaft (14) to a marine engine (4) and mounted on the horizontal drive axis (17). A pair of thrust bearings (44, 45) adapted to carry forward thrust loads are respectively disposed adjacent the facing portions of the opposed driving gears, with the pair being separated by a spacer (46) tightly confined therebetween. The spacer is locked against rotation but is freely floatable in an axial direction, and transfers the forward thrust load from one bearing to the other, so that the load is ultimately transferred from the outer propeller shaft (25) to the iner central shaft (21). The result is to reduce the rotational speed of each thrust bearing, in this instance by half.
Abstract:
A hydraulic fuse or cut-off device divides fluid flow into: (i) a primary fluid stream; and (ii) a secondary fluid stream having a substantially constant, but small ratio of flow to said primary stream. The secondary stream exerts pressure on a timing piston (7) which thereby monitors the entire flow and causes the fuse to cut-off when a predetermined volume of fluid has passed through the device. The fuse includes a regulating piston (6) for building inlet pressure to a value sufficient to develop the power necessary to drive the timing piston. Greater simplicity of the component parts and decreased sensitivity to contamination results from the use of a small fluid orifice to control the secondary stream. This is achieved by fitting the regulating piston with an inwardly directed flange (9), just touching the peripheral surface of a slightly tapered, central pin (10) whereby the taper of the pin causes the orifice to be created as the regulating piston is caused to slide as a result of the primary fluid flow.
Abstract:
In a marine fuel system for a fuel injected internal combustion engine, a fitting (50) is provided in the vapor supply line (41). The fitting (50) has a first reduced diameter passage (57) providing a vacuum bleed orifice passage partially venting vacuum from the induction manifold (17) to atmosphere, to limit peak vacuum applied to the vapor separator (33) from the induction manifold (17). The fitting (50) has a second reduced diameter passage (56) providing a flow restrictor passage limiting the volume of flow of fuel vapor from the vapor separator (33) to the induction manifold (17). The fitting (50) limits fuel vapor supplied from the vapor separator (33) to the induction manifold (17) at peak vacuum from the induction manifold (17) during rapid engine deceleration to prevent an overly rich fuel air mixture in the induction manifold (17) otherwise causing rough idling or stalling. The fitting (50) also solves hot restart problems. Another modification is provided by a one-way check valve (60) permitting only one-way flow of fuel from the vapor separator (33) to the high pressure fuel injection pump (25).
Abstract:
A marine fuel injection system for a two cycle crankcase compression internal combustion engine includes a puddled fuel return line having an outlet in the excess fuel return line from the fuel injector and pressure regulator to the vapor separator and high pressure fuel pump for recirculation. Excess fuel return flow creates a vacuum at the outlet of the puddled fuel return line to suction puddled fuel therethrough for recirculation together with the excess fuel to the fuel pump. The end of the puddled fuel return line at the outlet extends within and parallel to the excess fuel return line to occupy a portion of the cross-sectional area of the latter to reduce such cross-sectional area and create a venturi in the excess fuel return line at the outlet of the puddled fuel return line.
Abstract:
A marine trolling propulsion system (2) has a lower submerged housing (4) including an electric motor (5) driving a propeller (6) through a reducing traction drive provided by rolling contact of three balls (57-59) between split inner races (36 and 38) and an outer race (60) to drive a transfer member (68) which rotates the propeller (6). The inner race halves (36 and 38) are axially loaded by Belleville washers (72) providing constant axial force with axial deflection, and a limited maximum loading force capability to intentionally provide overload slip protection. The inner race halves (36 and 38) are keyed to the intermediate floating shaft (14) on raised hexagonal shoulders (32 and 34) permitting rocking of the inner race halves (36 and 38) and self-seating and alignement of the inner race halves to the balls (57-59). Couplers (16 and 124) are provided between the electric motor shaft (12) and an intermediate floating axial shaft (14) and between the transfer member (68) and the propeller shaft (70) which enable different axes of rotation to accommodate manufacturing variations. The transfer member (68) is also coupled to the propeller shaft (70) by structure (118, 126, 128) enabling the transfer member (68) to rock about the center of the propeller shaft (70) such that propeller thrust is transmitted equally to the balls (57-59).
Abstract:
A V-type four-stroke cycle internal combustion engine is providedwith an exhaust manifold (58) disposed in the valley of the V-shaped engine. The exhaust from the cylinders passes through the cylinder heads to an exhaust collection cavity formed in the exhaust manifold (58). The manifold is provided with water pockets (62, 64) above and below the exhaust collecting cavity to cool exhaust collected therein. An air intake manifold is (70) also provided in the valley of the V-shaped engine, located above and adjacent the exhaust manifold. The air intake manifold has a central cavity, with induction tubes (72) extending from the manifold to outside the valley of the V-engine for introducing air to the cylinders therefrom. The induction tubes provide induction tuning to the engine, to increase the torque provided by the engine. The arrangement of the engine components provides compact packaging for a V-type engine.