Abstract: The invention relates to an adjustable axial piston engine having spaced apart end walls with a shaft extending between the end walls. A rotary carrier is attached to the shaft adjacent one of the end walls and an oblique adjusting plate is mounted adjacent the other end wall. A piston-cylinder unit extends between the carrier and the oblique plate. A pivot axis for the oblique plate includes a bearing arrangement between the plate and the adjacent end wall. A servo unit for adjustably rotating the plate about the pivot axis is provided between the plate and the adjacent end wall.

Abstract: The invention relates to a method for connecting reaction sintered silicon carbide parts to iron and other metal parts of importance is that the connection involves the use of a binder comprising a mixture of silicon and a metal and preferrably it is a eutectic mixture.

Abstract: The invention relates to a hydrostatic power steering unit of the type having a gerotor gear set forming a metering motor and a valve unit for routing pressurized fluid from an inlet port selectively via expansible chambers of the gerotor gear set to either one of two motor ports while connecting the other one of the motor ports to an outlet port. The housing of the valve unit, which has inner and outer rotary sleeve members, is arranged adjacent the gerotor gear set. A cardan shaft connects the outer sleeve member to the gerotor star member, a gear head connected to the adjacent end of the outer sleeve is disposed internally of the inner sleeve member. Supply and drain ports and motor ports connectable to an external servomotor are provided in a cover plate which is fastened to the gerotor gear set on the side thereof opposite from the valve unit.

Abstract: The invention relates to a valve assembly for a refrigeration system of the modulating kind used for controlling the flow of refrigerant through the evaporator. The difference between the inlet and outlet temperatures of the evaporator is utilized to control the superheat but the evaporator inlet temperature taken alone is utilized to set different ranges for the valve actuator temperature to accomodate different operating conditions.

Abstract: A PTC starter that is electrically connected to an asynchronous motor by pins that extend through holes into the starter housing, which includes an open top, generally box shaped base portion and a cover having a downwardly opening recess mountable on the base portion. Support structure is provided in the base portion for loosely retaining a disc shaped PTC resistor and a pair of contact members on opposite sides of the resistor in a loose stacked relationship with the resistor, the support structure including a base portion receptacle for loosely retaining an electrical terminal bushing portion adjacent to a contact member. The cover in having its recessed portion moved downwardly along the contact members and resistor result in the contact members being resilient retained in electrical engagement with the resistor electrode surfaces, and at least two terminals extending upwardly through the cover. Advantageously the housing mounts a thermal protective switch for the motor.

Abstract: The invention relates to a method for soldering a metal electrode to an electrically conductive silicon carbide ceramic element and to a silicon carbide ceramic element made in accordance with the method. Silicon is used as the solder which provides a good electrical connection and, as the solder has approximately the same coefficient of expansion as the ceramic element mechanical stress due to temperature changes is minimized.

Abstract: The invention relates to a control unit for a hydraulically operated consumer of the type which is used for operating heavily intermittently and loaded machines such as cranes. The consumer is fed in accordance with a load sensing function with pressurized fluid which depends on the opening of the supply valve but is independent of load pressure variations. The invention is directed to minimizing the lagging of the adjustments to different loading conditions to provide more rapid stabilization. This is done by providing the signal conduit with three branches between the inlet and outlet lines to form a pressure dividing arrangement in which the signal pressure is no longer equal to the load pressure but is composed of parts of the load pressure and the output of a pressure regulating valve in the inlet line of the unit. Upon fluctuation in the load the amount of flow is not kept constant but instead decreases with an increasing load and increases with a drop in the load.

Abstract: In a vapor burner for liquid fuel there is an electrically heatable gasifying chamber (1), a passage system (K) concentric therewith for supplying air of combustion, and a burner tube (26) which surrounds a combustion chamber (25) and is bounded at the rear by an annular closure wall (22). The gasifying chamber (1) is formed substantially by a central gasifying tube (2). Guide means (19) serve to produce an external annular eddy (31) of combustion gases that extends along the inside (33) of the burner tube (26) rearwardly at least over a section disposed axially in front of the mouth (23) of the passage system (K). An ionisation measuring electrode (35) placed in the backward flow permits the flame to be accurately detected independently of the flame front which changes with a change in the burner output. When the burner tube (26) glows, there is automatic re-ignition if the flame blows off.

Abstract: The invention relates to a mass flow meter operable on the Coriolis principle having two rectilinear juxtaposed parallel arranged measuring tubes mechanically interconnected at their ends. An oscillator between the tubes produces opposite oscillatory movement of the tubes with a harmonic oscillation superimposed on the fundamental oscillation. Sensors between the tubes on opposite sides of the oscillator sense relative movement between the tubes and generate signals corresponding thereto. A circuit responsive to these signals determines resonant frequencies of the fundamental and harmonic oscillations and derives therefrom a correcting value which gives effect to axial stresses in the measuring tubes to determine a corrected mass flow.

Abstract: The invention relates to a hydrostatic power steering unit of the type having a gerotor gear set forming a metering motor and a valve unit for routing pressurized fluid from an inlet port selectively via expansible chambers of the gerotor gear set to either one of two motor ports while connecting the other one of the motor ports to an outlet port. The housing of the valve unit, which has inner and outer rotary sleeve members, is arranged adjacent the gerotor gear set. A cardan shaft which connects the outer sleeve member to the gerotor star member has a gear head connected to the adjacent end of the outer sleeve member but the shaft itself is disposed mostly in the gerotor star member. The bore of the inner sleeve member has a smaller diameter than that of the shaft head connected to the outer sleeve member and the annularly and axially extending valving grooves of the inner valve member may thus have relatively greater radial depths and thereby relatively greater capacity.

Abstract: The invention relates to a steam heating system and particularly to a vent control unit for a radiator in a one pipe type steam heating system. The vent control unit includes a thermostatically controlled valve for modulatingly venting air from the radiator to control the entrance of steam into the radiator in accordance with the heating requirements of the room. A check valve which bypasses the thermostatically controlled valve is provided to insure the admittance of air to the radiator during certain light heating conditions when the thermostatically controlled valve may be closed during a period when air must be admitted to the radiator to facilitate proper operating conditions.

Abstract: The invention relates to an apparatus for measuring a force wherein the force to be measured is applied to a beam in an axial direction. Oscillating forces applied transversely to the beam sets the beam in its resonant state and the resulting resonant frequency is an indication of the magnitude of the force.

Abstract: The invention relates to a thermostatic type of mixer tap having hot and cold water inlets and outlets for discharging water at an intermediate temperature controlled by a thermostatic valve unit. The mixer tap has a mixing chamber to which apportioned amounts of hot and cold water are admitted by the thermostatic valve unit and outlet valve for controlling the flow from the mixing chamber to the outlet. For drinking purposes there is provided a bypass conduit which extends from the cold water inlet to the outlet valve which bypasses the mixing chamber. The outlet valve is operable to selectively connect either the mixing chamber or the bypass conduit to the outlet as desired.

Abstract: A motor-compressor unit of the type in which a compressor piston is driveable by the eccentric of a motor shaft of a two pole D.C. motor. The starting characteristics of the unit are improved by off-setting phase-wise the torque developed by the motor from the torque required to drive the compressor.

Abstract: The invention relates to a mass flow meter which operates on the coriolis principle. The meter has two straight and parallel measuring tubes with two axially aligned compensating supply and discharge tubes arranged in parallel to the measuring tubes. The compensating tubes have approximately the same coefficient of expansion as said measuring tubes. A mounting member having supply and discharge passage has the juxtaposed ends of the compensating tubes connected thereto. The opposite ends of the compensating tubes connect to the respective juxtaposed ends of the measuring tube. An oscillator drives the measuring tubes in opposite directions and sensors are provided for detecting movements of the measuring tubes from which mass flow can be determined.

Abstract: The invention relates to an electrical control unit for controlling the speed of a pump motor of a pressurized fluid supply system having a tank. A pressure responsive switch unit connected to the tank has at least three switch positions corresponding to pressure levels in the tank. The switch unit outputs three different voltage levels to a transistor and circuitry responsive to the three voltage levels utilizes this input to control the speed of the pump motor. The circuitry includes an integration capacitor and the effects of charging and discharging the capacitor in accordance with the three voltage levels produced by the switch unit are utilized for controlling the pump motor.

Abstract: The invention relates to apparatus for connecting a radiator to a single or double tube type hot water central heating system. The connecting apparatus includes a conventional thermostatic valve and a conventional valve controlled bypass between the inlet and outlet connectors of the connecting apparatus. A constructural feature which results in lower manufacturing costs and a lower stock inventory for thermostats involves a return passage from the radiator outlets which has a setting valve that is actuatable independently of the bypass valve.

Abstract: The invention relates to a hydraulic system of the type in which a pump unit supplies pressurized fluid to a plurality of bidirectional servomotors. The system includes at least two modules each of which includes a bidirectional servomotor, a control valve and a compensating valve on the upstream side of the control valve. The pump unit includes a feedback loop having a throttle and a pump pressure regulator in series. Each of the modules has a sensing conduit connected to a common header which is operable to sense load pressure at the upstream side of the control valve for controlling the compensating valve in accordance with the load pressure. A pressure divider comparator valve is connected to the header and a point in the feedback loop between the throttle and the pump pressure regulator. The comparator valve is operable to compare the pressure at such point with the pressure in the header and to bleed pressurized fluid from that point to the tank to equalize the pressures.

Abstract: In an electromagnetic flow meter having a ceramic measuring tube, a housing arrangement is provided which forms a fluid tight capsule surrounding the measuring tube to prevent the escape of fluid if the tube should happen to crack or break in the use thereof.

Abstract: The invention relates to an electromagnetic flow meter of the type having a cylindrically shaped tube section with two magnetic poles each having a core section carrying a winding attached to the outside and on opposite sides of the tube section. Smaller dimensions and lower losses in the magnetic circuit are achieved by providing a casing or yoke unit formed of sheet metal members and having U-shaped core sections. The core sections have central webs adapted to the curvature of the pole shoes and rectangular coils are disposed respectively between the associated pole shoes and sheet metal yoke members.