Abstract: An electrical connector (2) is adapted at its forward end for insertion from the rear forwardly within a through opening (10) contained in a base member (1). A snap fastener retaining arrangement including a pair of resiliently outwardly biased hook members (6) on opposite sides of the connector is adapted to automatically engage corresponding shoulders on the base member when the connector has been inserted to a given position within the base member opening. The connector is thus releasably retained in position, whereupon the connector may be rigidly fastened to the base member by second fastener devices (4) operable from the front of the base member. Upon disconnection of the second fastener devices, the hook members may be manually compressed inwardly toward the connector to release the snap fastener retaining arrangement, whereupon the connector may be withdrawn from the base member opening.

Abstract: A dipole loudspeaker includes a rigid support containing an opening and a generally planar multi-layered flexible diaphragm mounted on the support and extending across the opening. The diaphragm is formed of a plurality of layers of thin flexible membrane material, each of the layers having a different height and containing a thin electrical conductor arranged in a predetermined pattern on one surface thereof. The conductor patterns on each of the membranes have different masses, whereby the membrane defines along its height areas of various thickness and varying mass whereby the membrane is suitable for more accurately reproducing or generating high and low frequencies when the electrical conductors are connected with a source of sound signal currents. A plurality of magnets are mounted in spaced relation opposite at least one surface of the membrane and the conductor patterns for vibrating the membrane to reproduce the sound in response to the sound signal currents through the conductor.

Abstract: A weighing apparatus comprising a first self-contained weighing device (1) including a first farme (2), a first load-receiving member (5) connected by a parallel guide arrangement for movement from a normal no-load position relative to the first frame, a load-responsive device (10) for indicating the magnitude of an applied load as a function of the movement of the first load receiving member, and a first motion-transmitting lever (7) connected between the first load receiving member and the position-responsive device, characterized by the provision of a second load receiving member (16,28) to which the load to be measured is applied, and a second pivotally mounted motion-transmitting lever (17,30) connecting the second load receiving member, thereby to provide a resultant load range that is higher than that of the first weighing device. Thus, various increased load ranges may be achieved starting from a standard self-contained weighing apparatus.

Abstract: A dual flat-spring electrical contact includes a contact receptacle which contains a separation gap and on which spring prongs protrude on one side while the cable connector protrudes on the other side. The contact receptacle is rigidly locked against expansion, as in the area of the separating gap, during insertion of a contact pin between the prongs because on a receptacle wall, in the area of the separating gap, there protrudes a T-shaped cover plate for which there is provided a holding recess which adjoins an adjacent contact receptacle wall.

Abstract: A holder is disclosed for use with a needle for collecting blood from a donor, the needle having a sharp tip at one end and being mounted in a hub at the other end. The holder is in the form of an elongated tubular member made of plastic and which is open at one end to allow insertion of a blood collection tube and has an opening at the other end to allow insertion of the needle, the latter end being sized so as to allow the needle to pass through but to frictionally engage and snugly hold the hub of the needle when the needle is inserted therein. A cover is hingedly mounted on the holder for closing off the end for receiving the blood collection tube and a bracket is fixedly attached to the tubular member for mounting purposes. The holder may be used as a device for assisting a person in safely and easily inserting the type of needle described above into a blood collection tube and may also be used as a receptacle for temporary or permanent storge of such a needle.

Abstract: A parking brake assembly of the blind-cable-connection type including a backing plate containing an opening, a helical guide spring arranged to guide a flexible resilient inner cable member toward a ramp surface on a parking brake lever for the blind connection to the inner cable member to the lever, characterized in that the angle of inclination of the ramp surface relative to the cable axis is contained in a plane that is both parallel with the longitudinal axis of the lever and that is inclined at an acute angle relative to the axis of the inner cable member. This construction permits the parking brake lever to be simply and economically formed from a blank of flat metal stock, the cable-retaining slot being defined by a slot contained between bifurcated portions of the ramp surface. The helical guide spring includes portions having tightly wound turns, thereby to assist in connecting the spring with the backing plate and/or with the parking brake lever.

Abstract: A conductor connection assembly includes a U-shaped receptacle into which one can insert from above a screw-clamping assembly comprising a screw, a nut threadably connected with the screw, and a wire protection part in the form of a barrel spring or collar connected with the screw. On the nut, there are provided lateral protrusions adapted to fit within corresponding recesses provided in the side walls of the U-shaped receptacle. The screw clamping mechanism and the U-shaped receptacle are locked into position since the collar includes in the upper area thereof lateral shoulder projections which abut against the side edges of the side walls of the U-shaped receptacle upon activation of the screw to displace the clamping mechanism downwardly into the receptacle.

Abstract: A circuit board terminal assembly includes a circuit board having a plurality of conductor strips arranged thereon and a plurality of connector and functional terminals mounted on the circuit board. The connector terminals are adapted for connection with an electrical conductor and with the circuit board conductor strips while the functional terminals are adapted solely for electrical connection with the circuit conductor strips. Thus, a functional terminal is selectively electrically connected with the connector terminals and the other functional terminals via the conductor strips. Each terminal includes on its side walls elements for mechanically connecting adjacent terminals together.

Abstract: A heavy-duty electrical plug connector is characterized by a label plate slidably connected with the connector housing for movement between retracted and extended positions. A label containing information designating the poles of the plug connector is provided on the plate. For wiring the connector, the plate is pulled to its extended or reading position wherein the labelled designations of the poles of the connector are visible. After wiring, the plate is slid beneath the housing to its retracted position where it takes up little space and where it does not interfere with wiring work on other connectors.

Abstract: A method and apparatus for cardiac hemodynamic monitoring is described. It is based on the complex field amplitudes of microwaves propagated through and scattered by thoracic cardiovascular structures, particularly the heart chambers, as a function of time during the cardiac cycle. Movement artifact and signal leakage are controlled by the use of closely coupled, flexible, light weight, passivated, conformal microstrip antennas that operate in the UHF band. The basic measurement technique is vector network analysis of the power wave scattering parameter in forward scatter configurations of various projections such as posterioanterior (PA), left anterior oblique (LAO), and right anterior oblique (RAO). Non-invasive evaluation of hemodynamic aspects of cardiovascular function is provided. Calibration is possible in human subject without invasive methods.

Abstract: A pressurized oil filter/carbon separation device includes a housing containing a plurality of separator chambers, a transfer chamber and a filter chamber. The housing includes a dirty oil inlet through which lubricating oil from an internal combustion chamber is delivered the separator chambers for serial flow therethrough. Within each chamber, carbon particles from the lubricating oil are separated from the oil flow owing to the forces of gravity within each chamber. The carbon particles are allowed to exit the lower portions of the separator chamber via discharge pipes at the bottom of the housing. From the last separator chamber, the oil is delivered to the transfer chamber for introduction into a filter chamber which contains a mesh-type filter screen to remove further minute particulates from the oil. The filtered oil exits the housing via a plurality of openings at the top of the housing and is delivered by a discharge pipe back to the internal combustion engine.

Abstract: A tension mounting system and assembly for suspending a flexible sheet material in a taut condition from a generally planar support surface and providing selective tension adjustment of the flexible sheet material is provided. The mounting system and assembly is especially suitable for use in signs displaying advertising material, such as billboards, signboards, and the like.

Abstract: A protective wind screen (9) for weighing scales is provided that is of hollow generally tubular construction adapted for vertical mounting on the upper surface (15) of the scale housing (3) concentrically about the movable weighing pan (7). The wind screen includes a plurality of movably connected wall members at least one of which is of U-shaped construction including a base portion and a pair of spaced upwardly extending leg portions (25, 27) between which is a plate (17) is mounted. Preferably, the plate is mouned for removal from the U-shaped wall member, thereby to permit access for initial weighing adjustment of the scale, or for loading of the scale. A mounting shoulder is provided on the housing for preventing lateral movement of the wind screen when mounted on the housing upper surface.

Abstract: A binary-to-bipolar converter converts two binary signals into positive and negative bipolar pulses alternately corresponding to a "1" logic state of two binary signals. The bipolar pulses are defined by the low output impedance states of two transfer gates. The main object of the invention is to reduce the transient trailing of the rear edges in the bipolar pulses. This can be obtained by delaying the drop from the low impedance state to the high output impedance state by means delaying control signals on the transfer gates, or by an integrator circuit applying calibrated pulses onto the output of the transfer gates, in response to the rear edges of the "1" logic states in the binary signals. The converter also calibrates the rise times of the bipolar pulses and allow the use of CMOS circuits upstream of the converter.

Abstract: In a multi-pole plug connector assembly including pin and socket housings having contact carrying inserts connected therewith, the fastening screws used to connect the inserts with the respective housings have three different head configurations to serve as coding elements for indicating proper orientation of the housings for plugging connection therebetween. One of the three different head configurations can be combined only with itself while the remaining two head configurations can be combined only with each other. A large number of coding possibilities can be obtained for a plurality of adjacent connector assemblies without increasing the space requirement of the assembly and without decreasing the number of poles or pins being connected.

Abstract: A method of producing an embossed structure on a workpiece includes applying texturizing components to a carrier surface of a pressing member and causing the texturizing components to form the embossed structure on the workpiece by pressing the pressing member and the workpiece against one another with the carrier surface facing the workpiece. The texturizing components may be connected to the pressing member by gluing, soldering or welding. An apparatus for performing this method includes two pressing belts which are being pressed against the workpiece passing therebetween, at least one of such belts being provided with the texturizing components at an outer surface thereof by an applicator apparatus arranged upstream of the location at which the belts come into contact with the workpiece. The texturizing components may be removed from the belt after each or after several embossing operations.

Abstract: A tarp cover system for flat bed vehicles includes inverted U-shaped bow members that extend transversely of the vehicle, the lower ends of the leg portions of the bow members being connected with carrier devices by means of which the bow members are displaced longitudinally of the vehicle. The bow members carry a tarp cover member that covers and uncovers the vehicle bed when the bow members are displaced longitudinally between expanded and contracted conditions relative to the vehicle. Bump rails are provided that protrude at each side of the flat bed beyond the guide tracks in which the bow carrier devices are displaced, thereby to protect the guide tracks and carriers against damage, and also to permit connection of the load to the flat bed regardless of whether the cover is in the expanded load-covering condition, or the contracted load-exposing condition.

Abstract: A unique one-piece disposable clipper head is characterized by the provision of a synthetic plastic base molded as a unitary structure about two metal cutting blades which are integrally formed with the base during an insertion molding process. The base includes a fixed portion with which the lower cutting blade is integrally formed and a movable portion with which the upper cutting blade is integrally formed. The upper movable portion and the lower fixed portion of the base are initially formed as a unitary structure. Following molding of the base, the movable portion is separated from the fixed portion to afford horizontal or lateral displacement of the movable portion and the upper blade relative to the fixed base portion and the lower blade. The base contains a recess in the bottom surface thereof for receiving the clamping mechanism of an electric clipper for attachment thereto.

Abstract: A child-resistant container for pills or the like includes a continuous sealing wall that cooperates with a friction fit with the continuous wall that defines the container chamber, thereby to seal the chamber against moisture. In order to maintain the integrity of the seal during the latching and unlatching operations, the latching arrangement between the top closure and body members is structurally independent of the sealing wall.

Abstract: A test bench is designed to determine the transfer function of a radio link in terms of variations in amplitude and a group propagation time depending on frequency. A transmission section of the test bench comprises an oscillator delivering a pulse signal having a predetermined intermediate frequency, a generator generating an exploration signal having a predetermined low frequency and a marking pulse signal synchronous with the exploration signal, a summator summating the exploration signal and an analog signal into a wobbulation signal, a r.f. wobbulator controlled by the wobbulation signal for producing a wobbulated signal to be transmitted. In a receiving section of the test bench, an analyzer receives the wobbulated signal via said radio link to analyze parameters of the radio link, such as the link group propagation time.