Abstract: A microprocessor based, digital to digital converting, full duplex time division multiplexing data set operating in burst mode transmission interfaces a data terminal to a communication path for communicating with another data terminal. The data set includes a transmitter, a receiver, a controlled transmit/receive switch, digital logic control circuitry, and a microprocessor for communicating with and controlling the other elements thereof. Communication is based on a bipolar code, and bipolar violation encoding is used to signal special messages. Control words, indicated by bipolar violations, are generated within one data set and transmitted to another data set as a preamble to a bipolar violation for communicating information to, and controlling operation of, the other data set. Special start and stop bits are generated by the data set before and after each fixed length data block for clock synchronization and DC balancing, and are stripped from the data clock by the receiving data set.

Abstract: An artificial limb consisting of a tubular member having inner and outer walls and formed by at least three interconnected side-by-side air inflatable compartments fabricated from an air impervious flexible material. The stump of a patient's limb may be inserted into one end of the tubular member, which preferably tapers therefrom towards the other end, and is gripped by the inner walls thereof when the compartments are inflated. Below the stump the inner walls interengage with one another as the compartments inflate and in order to provide a sufficiently rigid pylon to fully support the patient's weight a plurality of rigid longitudinal stiffening members are disposed around, and cooperate with, the outer walls of the tubular member. Preferably the stiffening members are hingedly interconnected along longitudinal marginal side edges and fabricated from a single sheet of rigid transparent thermoplastic material such as polyvinylchloride.

Abstract: A process for improving the compressive strength of iron ore agglomerates, such as pellets or briquettes, used as a feed to an iron blast furnace, in which the particulate iron ore is treated, either before or after agglomeration with sufficient liquid or gaseous iron pentacarbonyl to provide about 2-5% carbonyl iron on the surfaces of the iron ore particles, following decomposition of the iron pentacarbonyl by heating, and induration of the pellets or briquettes.

Abstract: A bone clip for surgical repair of bones in vivo, having a body and depending legs at each end thereof and perpendicular thereto. Means are provided to draw the legs inwardly towards each other after insertion into the bone so as to draw the bone ends together under a preselected pressure.

Abstract: A light weight and inexpensive sampling device to sample the respirable fraction of aerosols in a work environment on a continuous basis is described. The device consists of a short length of capillary tubing having an internal diameter of about 1.3 mm in a series with a somewhat longer length of capillary tubing having an internal diameter of about 0.5 mm which acts as a collector or sampler and which is in turn connected to an aspirating device. The sampler tube may be wound on a spool which is so small that the entire device is button sized and may be conveniently worn on the lapel as a personal monitoring device. The trapped respirable aerosol particles may be washed out of the sampler periodically for counting and/or chemical analysis.

Abstract: A bone clip for surgical repair of bones in vivo, having a body and depending legs at each end thereof and perpendicular thereto. Means are provided to draw the legs inwardly towards each other after insertion into the bone so as to draw the bone ends together under a preselected pressure.

Abstract: A device for measuring rib hump angle in the diagnosis of scoliosis, which comprises a frame, a plurality of stiff, laterally spaced parallel finger-like members arranged in pairs along one side of the frame with the two members of each pair equally spaced on opposite sides of the centerline of the edge, and frictionally slidable on the frame parallel to the centerline of the edge, so that when the frame edge is transverse and perpendicular to the longitudinal axis of the spine each finger-like member can be pushed into contact with the back. Means are also provided on the frame to measure the angle subtended between a first line perpendicular to the movement of the fingers and a second line intersecting the first line and passing through a selected point on the highest finger on the "high" side of the spine and the corresponding point on the other finger of the pair on the other or "low" side of the spine, so that rib hump angle can be measured directly.

Abstract: A relatively inexpensive electronic delay timer particularly suitable for portable use in such applications as control of a camera shutter. The timer can be used in either a leading or trailing mode and employs a small 6V battery as a power source. An integrated circuit timer device is arranged to provide an output signal at the end of a time delay period which can be variably selected by means of a built-in capacitive-resistive network and which is arranged to start in response to a movement of an external control switch. The output signal triggers a second time period of predetermined duration in a second integrated circuit timer during which time a second output signal is generated thereform which is used to activate a transistor device, allowing a capacitor in the circuit to discharge therethrough and through a solenoid which is mechanically coupled to the camera shutter. When the second output signal ceases, at the end of the second time period, the transistor is deactivated and the capacitor recharges.

Abstract: A simple and inexpensive device for measuring radial expansion of tube-like structures which is particularly useful to measure male potency. A radially expansible loop comprising a flexible, relatively slippery tube made from a material such as paper or a thermoplastic film having an elongated tail of the same or different material extending therefrom is drawn tight around the flaccid penis, by means of draw means at the end of the tail, and held in place by an adhesive patch. Should an erection occur the tail slides partially out of the tube to accommodate the radial expansion which occurs and remains in the extended position until manually retracted by pulling the draw means at the end of the tail. The radial expansion can be assessed by measuring the extension of the tail exposed.

Abstract: A wheelchair and occupant restraint system for use in a vehicle in which a pair of brackets are mounted on spaced apart frame members of the wheel chair. One end of each of a pair of flexible straps are secured to an anchor on the floor of the vehicle and the other end of each strap is releasably secured to one of the brackets. One end of each of a second pair of straps is secured to a respective bracket and the second pair of straps is arranged to releasably secure the occupant in the chair. The straps and brackets are so arranged that forces applied to the second pair of straps are transmitted directly to the floor anchors via the first pair of straps.

Abstract: An electro-slag welding method and apparatus has been developed for butt-joint welding of steel rails or other metallic pieces having irregular cross section, in which the head and the web of the rail is surrounded with a conventional water cooled copper mold and the flange area is surrounded by a ceramic lined crucible. In addition to the conventional single central welding electrode, two or more electrodes are inserted through the lids of the ceramic crucible adjacent the outer ends of the rail flange so as to reduce the total welding current required to produce a complete flange weld and spread the welding energy, thereby reducing excess power and overheating at the central electrode, resulting in better metallurgical quality welds.

Abstract: A process for preparing compounds of the formula ##STR1## in which R is hydrogen or methoxy,R.sub.1 is a hydroxyl group,R.sub.2 is chlorine, bromine, OAc or SHET,R.sub.3 is hydrogen or a cleavable carboxy-protecting group preferably selected from loweralkyl, benzyl, benzhydryl, loweralkoxyloweralkyl, loweralkoxybenzyl, phenacyl, trimethylsilyl, 2,2,2-trichloroethyl or pivaloloxy,R.sub.4 is hydrogen or a cleavable amino-protecting acyl group, or R.sub.4 NH represents phthalimido, andHET is a five or six membered aromatic heterocycle containing 1-4 heteroatoms and optionally substituted with loweralkyl,and from which the corresponding 1-oxacephem derivatives can be prepared is described. The novel intermediate compounds of the formula 1 are produced from a penicillin derivative of formula 1 wherein R, R.sub.3 and R.sub.4 are as above described and R.sub.1 and R.sub.

Abstract: A special form of fluid cyclone in which the velocity energy in the exit fluid is converted into exit pressure thus permitting the device to discharge to atmospheric pressure or a higher pressure while a vacuum may exit in the central core of the vortex. The result is achieved by use of a curved passage at the exit which starts as a coaxial space and gradually expands and turns outward to become a circular space between two disks. The removal of reject material to atmospheric pressure with a vacuum at the core may be achieved by limiting the restriction in cross-section of the bottom core such that the pressure is atmospheric and allow it to leave through a space between the end of the cone and a blunt shaped surface.

Abstract: An abrasion resistant heat treated austenitic manganese steel containing about 1% carbon, 13% manganese and 1.2-2.0% vanadium. The steels are heat treated so as to disperse austenitic grain boundary vanadium carbides uniformly throughout the matrix.

Abstract: A motorized track car with a wheeled lower portion for rolling along a railroad track, and a platform carried by the wheeled lower portion. The platform has seating accommodation for one or more persons with the propulsion means for the vehicle disposed below the platform. The propulsion means consists of an internal combustion engine drivingly connected to hydraulic pump means providing fluid pressure for hydraulic motors drivingly associated with wheels of the car. There is control valve means operable by a person seated on the platform to control flow of hydraulic fluid for the pump and motor to vary the speed of travel of the vehicle from zero to maximum in each of forward and backward directions of travel. There is brake means operatively associated with at least one wheel of the track car and operable from the platform and, preferably, by a single lever control which also operates the control valve means.

Abstract: A wheel chair propulsion device particularly for use by quadriplegics that includes an annular ring smaller in diameter than the large wheel of a conventional wheel chair and having a plurality of spaced apart recesses in a surface thereof. The ring is fastened to the wheel of the wheel chair in co-axial relation therewith and spaced outward therefrom. A lever is pivotally mounted on the wheel chair axle and an opposite end of the lever projects above the conventional arm rest on the wheel chair. A drive mechanism is mounted on the lever arm and positively engageable with the annular ring for rotating the same and disengageable therefrom to allow free rotation of the wheel. The drive mechanism comprises a lug movable into and out of the recesses in the ring in response to movement of the lever in a direction transverse to the plane of the wheel and resilient compressible means which is compressed by movement of the lever in a direction to move the lug into a recess in the ring.

Abstract: A relatively inexpensive solution for the single step preservation of fresh naturally colored blooms, comprising (in amounts per liter)600-700 ml tert-butyl alcohol200-250 ml 2-propanol3-30 g thiourea3-30 g citric acid3-30 g sodium citrate50-150 ml propionic acid0-250 ml phenol.

Abstract: A process for preserving green colored plant tissues while retaining the natural green color thereof, in which the tissues are immersed in a relatively inexpensive solution comprising up to about 90% water, at least one monohydric alcohol, at least one preservative component such as sulphurous acid, and sufficient buffering and mordant reagents such as citric acid and cupric salts such as cupric chloride and cupric sulphate, to control the pH and osmolality of the solution and so as to permanently retain the natural green color in the tissues.

Abstract: Apparatus for measuring torque (or functions derived therefrom or related thereto) transmitted by a shaft driven to rotate and connected to a load. The apparatus includes first and second optically flat, radiation reflecting, surfaces located on the shaft at respective first and second positions displaced from one another axially along the shaft and means for directing beams of radiation from a suitable source at the reflecting surfaces. There are first and second pick-up means spaced from the shaft and located to receive the radiation beams reflected by the respective first and second reflecting surfaces during rotation of the shaft and provide respective first and second outputs as a result of the radiation beams directed thereat by the reflecting surfaces. Signal processing circuit means associated with the first and second outputs provides an output interrelated with angular twist of the shaft at one of said first and second positions relative to the other.

Abstract: A process for the safe and efficient disposal of toxic chlorinated hydrocarbon waste materials in which the chlorinated hydrocarbon is brought into close surface contact with a finely divided para- or ferromagnetic material, such as a fluidized bed of iron powder, in the presence of high intensity microwave radiation, so as to effect an electron transfer reaction which yields chloride anions, which subsequently react with the iron to form ferrous chloride, and an organic radical which is readily oxidized, in the presence of gaseous oxygen, to carbon dioxide and water.