Abstract: The invention relates to an ultrasonically operative device operable with an ultrasonic signal having a predetermined wave length for measuring physical quantities such as the flow speed of a medium such as water. The device includes an ultrasonic transmitter and an ultrasonic receiver with a tube unit therebetween defining a transmission path for the medium. The tube unit has an internal diameter less than about fifteen times the wavelength of the signal. The tube unit includes an outer metal tube and an inner plastics liner of a plastic such as a polyamide.

Abstract: The invention relates to a rotary type piston machine of the type having inner and outer relatively rotatable and orbital ring and wheel gears and a pivotal drive shaft connected to the wheel gear. The casing forms sidewalls for the gears and leakage between the wheel gear and the sidewalls is a chronic problem. The wheel gear on the side opposite from the drive shaft is provided with an annular groove and a sealing ring therein to provide sealing between the inner gear element and the adjacent sidewall. The shaft side of the wheel gear has recessed areas in the crests of the teeth thereof to provide pressure compensation for the effect of the sealing the above referred to sealing ring on the opposite side thereof.

Abstract: The invention relates to an encapsulated refrigerator assembly of the type in which an integrated motor and compressor unit is resiliently mounted in a hermetically sealed casing or capsule. An oil sump at the bottom of the capsule is provided for lubricating oil. An externally disposed centrifugal separator with an oil collecting tank at the bottom thereof provides refrigerant in vapor form for the compressor and oil for the oil sump. The compressor has a main inlet for receiving refrigerant vapor from the separator and a throttled inlet for receiving a refrigerant vapor which is present in the capsule and which entered entrained in the oil received from the separator. The capsule has a single port and two tubes extend from this single port to the separator. An outer tube provides fluid communication between the separator oil collecting tank and the interior of the capsule which houses the motor and compressor unit.

Abstract: The invention relates to a thermostatic valve regulating system having a central control unit for operating two or more remotely located valve operating units. The valve operating units are for heat transfer equipment such as radiators. The valve operating units have expansible chamber elements and associated valve operating rods. The central control unit has an adjustable temperature response expansible chamber element -TRECE) with a vapor-liquid filling. The central control unit also has a transmitting expansible chamber element (TECE) which is connected to all of the expansible chamber elements of the valve operating units with capillary tubing. The capillary tubing and the connected expansible chamber elements are filled with a liquid transmitting element. The temperature responsive TRECE is in series relation to TECE and expansion and recession thereof cause an opposite recession or expansion of TECE.

Abstract: The invention relates to an encapsulated refrigerator assembly of the type in which an integrated motor and compressor unit is resiliently mounted in a hermetically sealed casing or capsule. An oil sump at the bottom of the capsule is provided for lubricating oil. An externally disposed centrifugal separator with an oil collecting tank at the bottom thereof provides refrigerant in vapor form for the compressor and oil for the oil sump. The compressor has a main inlet for receiving refrigerant vapor from the separator and a throttled inlet for receiving refrigerant vapor which is present in the capsule and which entered entrained in the oil received from the separator. The capsule has a single port and two tubes extend from this single port to the separator. An outer tube provides fluid communication between the separator oil collecting tank and the interior of the capsule houses the motor and compressor unit.

Abstract: The invention relates to a combination heating and cooling valve assembly having a housing with horizontally aligned inlet and outlet ports and a second outlet port which opens downwardly at right angles to the other two ports. A movable valve plate having an aperture and upper and lower closure portions cooperates with the first outlet port. The valve plate has two closed positions corresponding to heating and cooling operations with either the upper or lower closure portion thereof covering the outlet port. A valve rod unit connected to the valve plate has a temperature responsive expansible link for lengthening and shortening the effective length of the rod unit depending on whether the valve assembly is controlling a cooling or heating medium. The expansible rod link is accessible to the heating or cooling medium which supplies the heat or cold for operating the link.

Abstract: The invention relates to an electric snap switch assembly which includes a stiff arm which is pivotal about a fixed axis abutment and is movable in a range between two operative positions. A sheet metal hinge member extends the length of the arm and is attached to the fixed axis abutment and to the arm. A sheet metal spacer member is attached to a movable abutment and a U-shaped bow spring straddling the movable abutment is maintained in a compressive state with one leg thereof attached to the free end of the hinge member and the other leg thereof attached to the movable abutment member. A pivotally mounted adjustment member carries the movable abutment.

Abstract: The invention relates to a single phase asynchronous motor having a main winding branch and an auxiliary winding branch for starting. The auxiliary branch has a first section having a first winding and a second section having a second winding and a capacitor in series. The second branch has a PTC resistor in shunt with the second winding and capacitor combination. This arrangement with the PTC resistor facilitates a design which involves selecting the number of turns and the resistance values of the auxiliary windings so that an optimum starting torque can be achieved at the cold temperature of the PTC resistor and a high breakdown torque can be achieved at the hot temperature of the PTC resistor.

Abstract: The invention relates to a starting device for an asynchronous motor in which device a capacitor and a PTC resistor form a series circuit. A housing has three chambers formed by two interior walls and a cover. The capacitor is in one end chamber, the PTC resistor in the middle chamber, and the lead ends which are connectable to a motor winding in the other end chamber. The PTC resistor is subject to heating and the housing has vent holes for ventilating the middle resistor chamber.

Abstract: The invention relates to an encapsulated motor compressor assembly for refrigerators. An integrated motor compressor unit is resiliently supported inside the casing of the assembly on helical springs which engage the lower side of the stator laminations. The points of spring engagement are in a lower plane in which it is desired to prevent or minimize radial deflection of the motor compressor unit. This is accomplished by placing certain constraints on the design of the vertical motor shaft which has the usual eccentric crank for driving the compressor piston and a compensating weight for balancing the centrifugal effects of the crank. It was discovered that certain relationships between (1) the mass of the compensating weight and the spacing of its center of gravity from the shaft axis, and (2) the mass of the eccentric crank and the spacing of its center of gravity from the shaft axis, are in fact effective to minimize radial deflection of the motor compressor unit in the above referred to lower plane.

Abstract: A charging apparatus for an electric storage heater includes a resistance heater in series with a low tariff time switch and a charging switch. While the low tariff time switch is closed, usually at night, an integrator controlled by a differential amplifier controls the charging switch in accordance with the total charge accumulated by the integrator which reflects the use of energy during the preceding day. The charge of the integrator at the end of the day is the result of it being intermittently charged and discharged by a voltage divider circuit which has one or more temperature responsive resistances and transmits a voltage to one input of a differential amplifier for the integrator which can be above or below a reference voltage on the other input of the amplifier.

Abstract: The invention relates to an ultrasonic measurement circuit of the type having an ultrasonic converter connected by a line to a transmission pulse generator. The circuit may have two transducers which operate alternately as a transmitter and a receiver and, in this case, the circuit also has a receiver amplifier. A resistor for preventing reflections is provided in the line between the pulse generator and the ultrasonic transducer which resistor is adapted to the wave resistance of the line. The pulse generator is shunted by a branch line having a switching device which becomes conductive at the end of the transmission impulse.

Abstract: The invention relates to a cable clamp assembly of the type used for fastening electric cables to machinery frames. The assembly has two main parts which are (1) a body member having two slotted openings formed in part by thin flexible wall portions and (2) a base plate attachable to the body member with the resilient portions on the one hand functioning to provide a locking engagement between the body member and base plate and on the other hand being rigidly supported by the base plate. Prior to fastening the base plate to the body member cables may be inserted laterally into the openings by bending the resilient wall portions to sufficiently enlarge the slots to permit the lateral entry of the cable into the opening. The base plate is then fastened to the body member, or vice versa, and the whole assembly is then attached to the frame or casing of a machine. A set screw arrangement is provided for fastening the cable securely in the slotted opening into which the cable was inserted.

Abstract: The invention relates to apparatus for ultrasonically measuring physical parameters of flowing media. A measuring path has two ultrasonic converters with transmitting and receiving devices being connected to the converters. The path has at least one component in the direction of flow and over which ultrasonic signals are sent alternately upstream and downstream. A comparator unit connected to the receiving device has an input for a reference signal from the control unit applied thereto at a predetermined time after the time of the transmitter starting signal. The comparator unit generates early or late signals when arrival signals from the receiving device come in earlier or later than the reference signal. A first signal level generator connected to said comparator unit produces a first main signal related to the velocity of sound in said media. A second signal level generator connected to the logic circuit for producing a second auxiliary signal related to the flow velocity of said media.

Abstract: The invention relates to a refrigeration type motor compressor assembly in which an integrated motor compressor unit is resiliently mounted in a sealed casing. A skeleton-like frame facilitates integrating the motor and compressor with a minimum amount of structural material. This frame includes a shaft bearing member and a cylinder member for the compressor function, these two members being joined by a beam member which is attached to the bearing member and extends to the cylinder member. The beam member has support posts depending therefrom which rest on the upper surface of the stator laminations.

Abstract: The invention relates to refrigeration apparatus of the type in which a motor-compressor unit is resiliently mounted in a sealed casing. A resilient refrigerant discharge tube extends from the compressor to an outlet port in the casing. The discharge tube is made resilient to prevent noise and vibrations from being transmitted outwardly to the casing. The discharge tube has at least two convolutions in intersecting planes which are preferably at right angles to each other and are generally vertically disposed to form angles of less than 45 degrees relative to the vertical motor axis. The convolutions are preferably rectangularly shaped.

Abstract: The invention relates to apparatus for heating and/or cooling a room which is large enough to require at least two heat exchanger units. Controls are provided which dependingly relate the outgoing air stream temperatures of the heat exchangers to avoid the causing of drafts in the room. One of the heat exchangers is a guide unit and all others are follower units. Each heat exchanger has its own individual control such as a valve for admitting heat exchange fluid to the unit. The guide unit has associated room temperature sensor and setting devices for controlling its individual control. Each follower unit has a pair of temperature sensors for jointly controlling its associated individual control. One sensor of each pair is in the outflowing air stream of the guide unit and the other sensor of the pair is in the outflowing air stream of the associated follower unit.

Abstract: The invention relates to an integrated thermostatic control system for cooling and heating. The control system includes cooling and heating valves and fluid pressure controlled operating elements for the valves. The system has a common sensor and a common variable chamber temperature setting unit. A capillary tube system connects the operating elements to the sensor and the temperature setting unit. An adjustable spring associated with either of the operating units biases the associated valve in the closing direction to provide an operationally dormant dead zone.

Abstract: The invention relates to a thermostatic valve assembly for refrigeration systems. The valve assembly is between the condenser and the evaporator and includes two valve units in series. The two valve units are shown integrated in one casing but could be provided with individual casings. The second valve unit has the conventional thermostatic function while the first valve unit functions to isolate the second valve unit from the effects of varying condenser pressures which go from high in the winter to low in the summer. In a pressure chamber between the two valve units a mean pressure is maintained which is between the condenser and evaporator pressures. The first valve unit is controlled by a balancing between opening forces created by evaporator pressure and a differential spring and a closing force created by the mean pressure in the mean pressure chamber.

Abstract: The invention relates to a refrigeration type motor compressor assembly in which an integrated motor compressor unit is resiliently mounted. The motor stator includes a stack of rectangularly shaped laminations with bevelled corners. Stator bolts extend upwardly through the laminations with the bolt heads projecting downwardly from the lower surface of the laminations. The resilient suspension system includes four generally cone shaped spring retaining abutment members attachable from below to the four corners of the stack of laminations. These abutment members have recesses for receiving the bolt heads and collars which extend outwardly beyond the bevelled corners of the stack of laminations. The collars are abuttingly engageable with the inner surface of the casing during lateral movement of the spring mounted motor compressor unit to provide bumper protection for this unit.