Abstract: Asphalt roads or the like are repaved by heating and decomposing existing pavement with microwave energy and then remixing and recompacting the constituents of the pavement, the operations being performed at the original location of the old pavement and in some cases without removing the pavement constituents from the roadbed itself. A microwave energy applicator may be traveled along the pavement in front of remixing, grading and compacting equipment or some or all of the equipment may be integrated into a self-propelled vehicle. The vehicle may carry a microwave applicator followed by remixing means such as rotary tillers or the like and grading and compaction devices, and may travel continuously down a road which is reconditioned as the vehicle progresses. Motor generator sets on the vehicle power the microwave sources and the hot exhaust from the motors may be directed to the pavement to supplement the microwave heating and to maintain high temperatures during the additional operations.

Abstract: A linear motion impactor device includes an impactor (28) which provides force to a hammer shank (56) only upon application of the hammer against a surface to be impacted thereby saving power and reducing noise during periods of non-use. The impactor (28) which operates on the hammer shank (56) is mounted in a housing (12) and is formed with a bore (30) normally coincident with the axis of rotation (22) of an eccentric cam (24) which is rotated by a power source (20). The impactor (28) is retained in this center-line position by a compression pad (38) positioned between the impactor (28) and the housing (12) and further positioned diametrically opposite the hammer shank (56). In the two embodiments described, either linear bearings (76, 78) or shear pads (42, 44) ensure linear motion to the impactor (28) during operation.

Abstract: Very high yields of ozone are produced in an electrolytic process. As high as 52% current efficiencies are secured in electrolytic cells wherein the electrolyte is water and highly electronegative anions. Anions having a so-called "composite electronegativity" of 17.5 or higher, are utilized in the electrolyte solution. The fluoroanions and in particular, the hexafluoro-anions are especially preferred. The anion producing compounds may be added to the electrolyte either in the acid form or in the form of salts. Electrolysis is carried out at room temperatures or at lower temperatures, e.g. down to the freezing point of water. Preferred anode materials for use in the electrolytic cells are either platinum or lead dioxide, especially lead dioxide in the beta crystalline form. The platinum metals, carbon, or nickel and its alloys maybe used as hydrogen-evolving cathodes.

Abstract: A novel electrode, an apparatus and a method are set out for electrolyzing a chloride ion containing aqueous solution to produce chlorine and ozone. Through utilization of a solid state rectifier network, and without the use of a transformer, full line voltage, after rectification, is applied between the anode and cathode of an electrolytic cell utilizing an anode which is a laminated body of a platinum group metal foil bonded to a tantalum or niobium layer which in turn is bonded to a titanium substrate. Chlorine and ozone production is quite rapid.

Abstract: A method is presented for measuring fluid flow rate in a system having a conduit through which the fluid flows. The method is particularly useful for measuring blood flow rate in a cardiovascular system. A substance which provides a plurality of microbubbles is added to the fluid flow system upstream of the measurement position in the conduit. An ultrasonic pulse is generated from a position opposite and spaced from the conduit as the microbubbles pass therethrough. A reflected ultrasonic image, created by reflection of the pulse from at least the wall of the conduit which is distal from said position, is measured. The fluid flow rate within the conduit is determined from these ultrasonic images using dye dilution techniques. In a living being, the pulse is preferably generated adjacent the rib cage or in the esophagus and the conduit is preferably the heart or the pulmonary artery, whereby, the blood flow rate determined is equal to the volumetric cardiac output rate.

Abstract: In a photoelectric smoke sensor which produces a fire alarm signal when an amount of attenuation of received light exceeds a predetermined level due to smoke flowing into a space between light emitting and light receiving devices, the level of a receiving light signal from the light receiving device is converted by a converting level control signal. An initial value of the receiving light signal is converted into a digital quantity which is stored in a memory circuit. The digital content of the memory circuit is then converted into an analog quantity. The analog quantity is then compared with the level-converted receiving signal to produce a fire alarm signal. The analog quantity and the level-converted receiving signal are compared with each other at a predetermined period to correct the converting level control signal when there is a difference between the analog quantity and the level-converted receiving signal as a result of the comparison.

Abstract: During operation of a construction vehicle, such as a wheel-loader, the operator may desire to open the door of the vehicle's cab for ventilation purposes. Full opening of the door may be obstructed by the deposition of a guard rail or the like, mounted on the platform of the cab, whereby the door can be only partially opened. It is thus desirable to provide a door holder which may be selectively positioned on the platform to hold the door in any desired, open position. In addition, standard latch mechanisms for holding a door of this type in its fully open position are generally mounted externally on the cab and are thus exposed to potential damage. The door holder (13) of this invention includes a latch member (14) movable between retracted and extended positions on the vehicle, and a hook (27) secured on a door (11) for engaging the latch member when the door is in open position and the latch member is in its extended position.

Abstract: A fluidborne noise attenuator (14) comprises a dampening medium (27) which exhibits a bulk modulus (e.g., 50,000 psi to 180,000 psi) substantially greater than that of an inert gas, such as nitrogen, and substantially less than that of a hydraulic working fluid (e.g., 225,000 psi). The attenuator (14) is capable of attenuating noise levels of hydraulic fluid over wide frequency and mean system pressure ranges in contrast to conventional attenuators which are "tuned" for the attenuation of noise levels at a specific frequency and mean system pressure.

Abstract: A ripper assembly (10) includes at least two ripper members (16,18) mounted in tandem relationship and adapted for connection to a vehicle (14). A linkage assembly (20) interconnects the ripper members. A hydraulic cylinder (44) is operable to raise and lower the linkage assembly (20) so that the leading ripper member (16) penetrates the ground first and thereafter the trailing ripper member (18) penetrates the ground, vertically below the leading ripper member. The ripper assembly insures efficient ground penetration and a self-cleaning function in comparison with conventional rippers of the multiple-tooth type.

Abstract: A safety lock for securing a radiation source in a radiography exposure device is disclosed. The safety lock prevents the inadvertent extension of the radiation source from the exposure device. The exposure devices are used extensively in industry for nondestructive testing of metal materials for defect. Unnecessary exposure of the radiographer or operator occurs not infrequently due to operator's error in believing that the radiation source is secured in the exposure device when, in fact, it is not. The present invention solves this problem of unnecessary exposure by releasingly trapping the radiation source in the shield of the radiography exposure device each time the source is retracted therein so that it is not inadvertently extended therefrom without the operator resetting the safety lock, thereby releasing the radiation source. Further, the safety lock includes an indicator which indicates when the source is trapped in the exposure device and also when it is untrapped.

Abstract: The invention relates to an anchoring arrangement which includes a lock clip fitting about the anchor arrangement and being in longitudinally slidable relative thereto. The lock clip includes a lock tab extending from a portion of the periphery thereof in a direction generally parallel to the anchoring arrangement. A tab retainer is defined by a relatively stationary support member for preventing the lock tab from rotating.

Abstract: The operating efficiency of a mass transfer device such as a blood dialyzer is considerably enhanced by subjecting the blood-carrying semipermeable fibers of the dialyzer to a toroidal dialysate flow produced within the fiber cartridge by one or more impeller or pump elements. The impellers may be rotary for continuous flow, or pistons with or without internal check valves may be used for intermittent or reciprocating flow. Moving adjacent impellers in opposite directions creates homogeneous zones of different impurity concentration within the dialyzer.

Abstract: A control device for a triple-plenum air conditioning apparatus having a by-pass air duct, a hot air duct and a cold air duct. A first shaft mounted through the by-pass and hot air ducts carries a first by-pass air damper blade and a hot air damper blade at right angles to each other. A second shaft mounted through the by-pass air duct and the cold air duct carries a second by-pass damper blade and a cold air damper blade at right angles to each other. The control device includes a first geneva link on the first shaft, a second geneva link on the second shaft and a third shaft carrying a drive plate with pins for independently actuating the geneva links and a geneva cam for holding one of the geneva links against rotation while the other is being independently actuated. Rotation of the third shaft through one hundred degrees results in rotation of each of the first and second shafts through ninety degrees.

Abstract: Free-lift of a lift truck carriage is desirable without extension of the uprights, along with the capability to extend the carriage above the uprights, all while retaining clear forward vision and a rigid mast structure. Herein, relatively movable mast members (14a,14b) are shorter than relatively fixed mast members (12a,12b), the sheaves (28a,28b) are affixed to the movable members (14a,14b), the chains (30a,30b) are attached to the carriage (16) over the sheaves (28a, 28b) and to the relatively fixed members (12a,12b), while the jacks (24a,24b) act between the relatively fixed (12a,12b) and movable (14a,14a) members. Slide bars (44a,44b) are movably mounted to the relatively movable members (14a,14b) and to the carriage (16).

Abstract: The push frame (12) of a tractor-scraper (10) normally has a plurality of cover plates (14) relasably secured therebelow to provide access internally of the push frame. In standard practice, the cover plates are secured to the push frame by a plurality of bolts and the heads of the bolts are subjected to wear and possible breaking-off due to their exposure upon operation of the tractor-scraper. This invention provides a mounting assembly (13) for expeditiously removing and replacing the cover plates upon wearing or breaking-off of the heads (19) of bolts (18) thereof by providing an internally and externally threaded bushing (24) which is threadably connected on the push frame and is further threadably connected to each bolt. Thus, a workman need only engage the bushing with a socket wrench or the like to release the bolt and thus the cover plate upon wearing or breaking-off of the heads of the bolts.

Abstract: A synthetic protein-free lung surfactant composition is utilized to temporarily substitute for natural lung surfactant in the mammalian lung where such natural lung surfactant is absent or in low concentration. The synthetic surfactant composition consists essentially of a major amount of 1,2-dipalmitoyl-sn-3-glycerophosphoryl choline (DPPC), and a minor amount of a fatty alcohol, preferably a fatty alcohol having from 14 to 18 carbon atoms, and especially n-hexdecan-1-ol. The synthetic surfactant composition is administered directly into the lungs of a distressed subject to create a film on the alveolar interfacial surfaces and reduce surface tension. Expansion of the alveolar spaces is thereby facilitated.

Abstract: An improved wind-propelled apparatus is disclosed which includes a body mounting a stub mast generally orthogonal thereto. The stub mast is mounted in a well formed on the body and secured by a sleeve, resilient annulus and plug combination. Mounted on the stub mast is a generally vertical sail mast which is rotatable about a vertical axis. The stub mast also mounts a boom of sufficient length as to be capable of passing under the sail and having an eye and strap arrangement for securing the boom on either side of the sail.

Abstract: A crawler tractor vehicle having steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. In one embodiment, the clutch valving spool and brake valving spool are identical in configuration, and are disposed in a common bore. Actuator means are associated with such clutch valving spool and brake valving spool, in one embodiment including an actuator assembly made up of a plurality of plungers movable relative to each other and relative to the valve body to provide particular movement of the clutch and brake valving spools. In another embodiment, the actuator means comprise mechanical linkage means, for providing movement of brake and clutch valving spools positioned in respective separate bores defined by the valve body.

Abstract: A brake system for a vehicle having spring applied, pressure releasable brakes (10) including a manual pump (28), a terminal board (14) having ports (16,18,20) terminating the system fluid pressure line (22), the brake pressure line (12) and the pump pressure line (76), and a U-tube (120) connecting two of the ports on the terminal board. In the alternative embodiment, an emergency brake release system for a vehicle having spring applied, pressure releasable brake (130) including a pump (166), and a control valve (140) for selectively connecting the pump (166) to the brakes (130) while connecting the fluid pressure supply line (133) to a reservoir return line (136). The valve (140) includes modes for connecting the brakes (130) to the supply line (134) through an orifice (192), and a brake outlet line (138) to the reservoir return line (136) for bleeding the brakes (130), and for isolating the supply line (134) while venting the brake line (133), for checking system pressure.