Abstract: A lubrication system for use in a rotary compressor wherein the pressurized refrigerant fluid is passed through a precooler and returned to the compressor housing before passing through the discharge line to the refrigeration system. Oil entrained in the compressed precooled refrigerant is passed in heat transfer association with the rear head of the compressor to evaporate therefrom refrigerant vapor which may be entrained in the oil, permitting the oil to be returned to the lubrication sump after such removal for improved lubrication of the compressor. The rear head defines a lubricating oil flow path which, in the illustrated embodiment, opens upwardly from the rear head, permitting the lubricating oil to flow over the rear head for improved heat transfer association therewith in effecting the desired removal of entrained refrigerant vapor therefrom.

Abstract: A machine control system for sensing an obstruction in the path of a machine tool and preventing movement of the tool along its path while requiring operator initiation for each machine tool actuation. A sensor is mounted on a movable support rod and adjustably positioned to move along a path coaxial with the path of the tool in order to sense any obstruction in a work area. The movable support rod is constructed to allow gravity fall of the sensor into the work area and to cause actuation of a switching circuit allowing machine tool movement if no obstructions are sensed. A spring-biased arm coupled to a rotary solenoid retains the movable support rod in a rest position. Upon actuation, the solenoid rotates the arm so that gravity causes the support rod to fall and the sensor to move into the work area. A normally closed switch is positioned to open in response to the end stroke of machine tool movement.

Abstract: A cooling radiator having a secondary cooling means and comprising a pair of spaced liquid coolant tanks, one of which is an inlet tank having a liquid coolant inlet adjacent one end and the other of which is a liquid outlet tank having an outlet adjacent its corresponding opposite end, interconnecting spaced coolant tubes between the tanks, a heat exchanger for cooling a second liquid such as engine oil located in the outlet tank with the heat exchanger having a spaced inlet and outlet and a confined liquid space therebetween for flow of this second liquid through this spaced and an internal fin within the heat exchanger located within an inner tube of the heat exchanger in heat exchange relationship with the liquid coolant in the outlet tank.

Abstract: The method and apparatus for forming flanged holes and a resulting plate and tube assembly of the type used in fluid-to-fluid, such as gas-to-gas, liquid-to-liquid and liquid-to-gas, heat exchangers. A depression is formed with the aid of a punch in a plastically deformable metal sheet such as steel, aluminum, copper and the like, while applying controlled counterpressure with the aid of a larger counterpunch so that material displaced from the space between the punches is laid upon the inner bore of a constraining die. Thus the wall of the depression is formed by purely compressive means. The base of the depression may then be removed to provide deep flanges of controlled dimensions free of cracks or splits.

Abstract: A fabric winding process and apparatus for preparing a fabric pattern. A winding machine comprises a rotary drive mechanism for intermittent rotation of two card-holding chucks, and a thread-guide carriage which is translatable along a path adjacent a card held by the chucks parallel to the axis of rotation of the card. The drive mechanism and carriage are coupled such that when the winding card is not rotating, the carriage shifts a distance corresponding to a selected number of turns on the winding card such that a yarn of a selected color is wound about the card at all points on the card corresponding to the color in the desired fabric pattern. In this way, a desired pattern may be prepared without the necessity of threading or knotting several yarns together.

Abstract: In a connector (14,15) for connecting a wiper arm to a wiper blade, a pair of spaced apart attaching means (16,17) are provided for alternately attaching the connector to the wiper blade. Appropriately dimensioned slots (22a,22b) and surfaces (31,32,33,34,35,36,37,40,41) are provided on the connector to cooperate with bayonet-type arm ends (3a,3b) and hook-type arms ends (1a,1b, 2a,2b) for securing the appropriate arm end to the connector. One connector (14,15) is capable of accommodating at least six different arm ends.

Abstract: The invention relates to a cable clamp for clamping cables to the cross rungs of a cable ladder, each cross rung being an elongate element having a `top` cross-section. The cable clamp includes a U-shaped bracket having a saddle element displaceable relative to the bracket between the limbs thereof, the free ends of the limbs having slot formations therein whereby the bracket can engage one flange or edge region of the cross rung so that with the cable passing between the limbs of the bracket, the saddle element can be displaced towards the cross rung to clamp the cable between the cross rung and the saddle element.

Abstract: A stabilizer bar for a hand held tool which extends laterally from the handle of the tool to receive and mate with the thumb to stabilize the hand grip of the tool. The stabilizer bar may be cylindrical and eccentrically adjustable to adjust to the comfort of the user's hand or may be provided with an elliptical body likewise adjustable for comfort. Furthermore, the stabilizer bar may be slidable through the handle of the tool to accommodate right or left handed grips.

Abstract: A powered floor sweeper having a nozzle housing formed of a plurality of segments and tie elements extending through the segments for retaining the segments in assembled side-by-side relationship. The assembled segments define open ends closed by end caps also secured in the assembly by the tie elements. A pivotable door is secured to the nozzle housing by a tie element and cooperating retaining structure is provided on the door and assembled nozzles for retaining the door releasably in a position closing the dirt-collecting space of the nozzle housing. The device further includes a sweeper brush rotatably carried in the housing and a powered drive for forcibly rotating the brush. Internal baffles separate the sweeper brush bearing zone from the dirt-collecting space. The brush bristle tufts are arranged in preselected spaced relationship to effectively minimize and substantially preclude dust puffing in the operation of the floor sweeper.

Abstract: An auxiliary power unit for an aircraft drives an electrical generator and an air compressor. The auxiliary power unit is primarily intended for operation with the aircraft on the ground when other aircraft power systems are shut down. The auxiliary power unit may, however, be used in an emergency to supplement the main aircraft generating system, with the aircraft airborne. When the auxiliary power unit generator is used in conjunction with the aircraft generating system, inlet air to the compressor is controlled to vary the compressor load on the power unit to minimize power unit speed changes and electrical frequency transients.

Abstract: A vacuum cleaner control providing solid state high and low speed electronic control of a vacuum cleaner motor. The control circuit is arranged to terminate operation of the motor in the event the sensed speed of a brush driven by the motor drops below a predetermined low speed as by jamming of the brush. A membrane touch switch panel includes switches which provide manually controlled inputs to the control. In one form, the control uses phase control in setting the low speed operation of the motor and in another form, the control utilizes half wave rectification in setting the low speed motor operation.

Abstract: An apparatus for wrapping a load carried on a floor-mounted pallet. The apparatus includes a carriage having a wheeled base for rolling movement about the pallet-carried load. The carriage is provded with an upright upstanding from the base and vertically movably supporting a carrier for a roll of wrapping sheet material. A handle structure is provided on the carriage for manipulation of the carriage in effecting the rolling movement about the pallet-carried load and mechanism is provided adjacent the handle for effecting vertical movement of the carrier to permit spiral wrapping of the sheet material about the pallet-carried load. The carrier is arranged to extend downwardly to a lowermost position, permitting wrapping of the pallet substantially at floor level and, in an uppermost position, for wrapping the uppermost portion of the load. The invention further includes improved structure for releasably retaining the sheet material roll on a spindle on the carrier.

Abstract: A complex of a long chain cationic surfactant and an organic anionic dye is useful in demonstrating the presence of and determining the concentration of fatty acids, compounds which hydrolyze to liberate fatty acids, or the activity of hydrolaze enzymes which produce fatty acids from a substrate.

Abstract: A refrigeration apparatus having item thawing means wherein items normally stored in a freezer compartment of the apparatus are automatically transferred to an above-freezing temperature refrigerator compartment seriatim for dispensing thereof in a thawed condition. In the illustrated embodiment, the items are food items. The food items are stored in a rack within the freezer compartment and are dispensed through an opening in the wall between the freezer and refrigerator compartments automatically as a result of the removal of a food item previously delivered to the refrigerator compartment for thawing therein. The automatic movement of the food items is effected by gravity. Structure is provided for cooperating with the food items in the communicating passage for effectively closing the passage against airflow between the compartments.

Abstract: A stall cock and pulsator for a milker. The stall cock is mounted on the pulsation vacuum line and has an electrical terminal connected with a source of pulsation control signals. The pulsator has a vacuum inlet for connection with the vacuum outlet of the stall cock and an electrical terminal for connecting the pulsation signal from a stall cock terminal to the pulsator valve. The stall cock vacuum outlet and pulsator vacuum inlet are square in cross section and when mated align the pulsation signal terminals on the stall cock and pulsator for interconnection. The stall cock has a cable connector with conductors in the stall cock body that have ends projecting from the connector to pierce the insulating covering of the conductors of the pulsation signal cable. A clamp holds the cable in the cable connector. The ends of the conductors in the stall cock body are laterally spaced from the stall cock vacuum outlet and generally parallel with the pipeline.

Abstract: A flattenable merchandising holder device including a pair of mounting elements swingably mounted in a display panel. The mounting elements define flatted locking portions engaging cooperating mounting channels on the display panel for selectively retaining the mounting elements in an operative position wherein a support provided on the lower end thereof extends forwardly from the lower end of the display panel. In a retracted position, the support elements are swung into general alignment with the flat plane of the display panel so as to define a flat arrangement of the device. The locking action is effected by longitudinally positioning the mounting element relative to the mounting channel. A connector is provided on the mounting element for mounting of the device to a perforated wall board. The display panel is provided with channel portions for removably mounting a display card element, such as for use with the merchandise intended to be carried on the support portion.

Abstract: An organ key assembly having a loosely mounted switch actuator providing self-aligning movement of the actuator relative to the switch. The switch, in the illustrated embodiment, is a membrane switch. The actuator is arranged to slide across the switch in effecting the operation thereof. The actuator is associated with the key in such a manner as to permit the key to be moved from an undepressed, normal position to the fully depressed position, with a substantially constant force. The actuator defines a novel configuration for providing the self-aligning function and switch wiping operation. In the illustrated embodiment, the switch is provided as a portion of a printed circuit board. A support structure is provided for preventing deformation of the printed circuit board by the actuator biasing forces.

Abstract: An event rate counter for measuring the number of events occurring per unit of time with an input pulse train having a fixed number of pulses per each occurrence of the event, wherein the input pulse train is scaled by a multiplier and divider to provide a direct readout in events-per-unit of time. The input pulse train is amplified and applied to a level detector, the output of which is a logic level pulse train having frequency equal to the frequency of the input signal. The pulse train frequency is monitored by a frequency detector for controlling a commutative switch. For low frequency pulse trains, the switch gates the pulse train from the level detector first to the multiplier, the output of which is gated by the switch to the divider. The multiply-divide sequence order is reversed by the switch for high frequency pulse trains thereby extending the dynamic frequency range of the counter.

Abstract: A toy gun incorporates light and sound sources for simultaneous generation of light pulses and sounds reminiscent of an outer space laser gun when a trigger is depressed. Light transmission material in conjunction with a reflector, radiate and project the light pulses generated within the gun in two different directions. The electronic circuitry for generating the light pulses and the sounds is completely enclosed within the grip of the gun.

Abstract: A socket wrench of the type having interchangeable sockets has its handle constructed to provide a cavity which has an entrance opening along one side and compartments in each of which one of the socket members may be received and frictionally gripped. An access opening in the wall operatively associated with each compartment permits application of force to the socket member in the compartment to remove it through the entrance opening.