Abstract: An endotracheal tube-holder assembly that includes an arcuate track member and a pair of face plates mounted at the free ends thereof for engaging the opposite sides or cheeks of a patient's face, and wherein an adjustable holding block assembly is slidably mounted on the track member which defines a support housing that includes a tube holding block and a bite block support in which a removable bite block is mounted.

Abstract: A brake and wire regulator for spools (22 or 40), which supply filler wire to an arc welding gun (10), includes a mounting plate (30 or 62) which is secured to a housing (12a, 12b) for the gun or to a remotely located wire supply housing (38) and a brake arm (32 or 58) having a proximal end pivotally mounted on the mounting plate with the distal end (32f or 58a) of the brake arm extending between the rim plates of the spool. A spring (38 or 64) extending between the mounting plate and the brake arm biases the distal end of the arm against the outer layer of wire on the spool to provide a braking action for the spool to prevent the wire from unspooling when the welding process ceases and impede migration of the outer most layer of wire across the spool.

Abstract: A nonstaining fingerprint ink is formulated from one or more alcohol soluble dyes, e.g., Acid Black 5 dye, dissolved in one or more fatty acid esters which have at least one available hydroxyl group, e.g., glycerol monoricinoleate, the dye constituting about 5% of the total ink by weight. An applicator, particularly well suited for the ink, includes a pad made of a melt blown calendared fabric encapsulated in a gas impermeable pouch.

Abstract: A balanced bridge (full or half) power transconductance amplifier utilizes an input voltage signal to control current converter, in the form of a differential circuit, to derive a pair of control currents representative of the input signal and a load current monitoring signal. The converter includes a current input terminal which responds to a current representative of the load impedance for reducing the amplitude of the control currents (and the bridge current) due to an impermissibly low load impedance. A class A to class B converter responds to the control currents to provide a pair of discontinuous bridge drive currents with each drive current being proportional to the difference in the control currents during respective half cycles. A differential amplifier steers the bridge drive currents to respective legs of a full bridge in response to the voltages across the power supply terminal and the load to reduce any bridge unbalance.

Abstract: A pin/socket contact is made from two contact parts, namely, a pin/socket member and a tail/coupling member. The pin/socket member has a blind bore therein for receiving a stub portion on the tail/coupling member. Burrs on the stub portion hold the tail/coupling and pin/socket members together. The pin/socket member can be standardized and inventoried in large quantities to be assembled to a variety of tail/coupling members in which the tail portion is in the form of a PC tail, wire wrap adaptor or a compliant adapter.

Abstract: An improved carpet tack strip formed from synthetic chemical and natural materials which include a selective amount of a polyethylene material of between 40% to 60% by weight, which is mixed with a selected amount of polypropylene material having about 1% to 10% by weight and including therein a fine powdered wood material having a selected amount of between 60% to about 40% by weight, wherein the mixture thereof is extruded from an extruding apparatus, thereby producing a continuous elongated homogeneous plastic strip that when cooled is cut in predetermined lengths.

Abstract: A fingerprint ink is formulated from a solvent carrier and a low structure carbon dispersion. Carbon particles with an agglomerate size of less than 100 millimicrons are dispersed in a hydrocarbon soluble oleo resin to form the low structure carbon dispersion, with the carbon particles accounting for about 40% to 60% of the total dispersion and the dispersion accounting for 20% or less of the total ink formulation.

Abstract: A gun trigger blocking apparatus to deter children and unauthorized and uninformed adults from being able to work the trigger and shoot a gun, rifle or shotgun. A first body member, adapted to be mounted on one side of a trigger guard, has an opening therein with buttress thread engaging grooves for receiving and releasable holding a locking rod affixed to a second body member adapted to be mounted on the other side of the trigger guard. A key lock is mounted on the first body member and arranged to rotate to an open mode by a key. Once in the open mode, the lock must then be depressed inwardly and at the same time a spring biased safety pin must be forced inwardly to disengage the buttress thread engaging grooves from the locking rod to allow the body members to be removed from the trigger guard.

Abstract: A vehicle emission analysis interface system for supplying a sample of a test vehicle's exhaust gases to the inlet of an analyzer for providing a quantitative measurement of selected pollutants includes an exhaust sample inlet port for receiving a sample of the exhaust gases. A high pressure inlet port is adapted to be connected to a high pressure source at the test facility. A chiller for lowering the temperature of incoming gas sample stream has an inlet connected to the sample inlet port and an outlet. The system further includes a zero air generator having an inlet and an outlet for supplying purified air for analyzer calibration purposes.

Abstract: A prosthesis for leg amputation at the knee joint or short distance above the knee is disclosed which includes an upper leg socket and artificial lower limb pivotally coupled together by a knee bracket attached to upper leg socket. The knee bracket is also pivotally coupled to a hydraulic unit carried by the lower limb. The knee bracket provides a hinge arrangement for the knee joint above the end of the amputee's leg stump by several inches thus providing a more natural looking and operating artificial limb.

Abstract: A light pen computer interface system utilizes a coil located externally of the computer's CRT display monitor to sense the magnetic field which provides the raster for the CRT. Vertical and horizontal sync detection circuits receive the sensor coil output and supply vertical and horizontal sync signals to a timing circuit. The timing circuit in response to an output signal from the light pen and the vertical and horizontal sync signals supplies a pen position signal to the computer which is either representative of the x,y coordinates position of the light pen on the CRT screen or representative of the change of x,y coordinates between successive positions of the light pen.

Abstract: A refrigeration cycle combines a concentrated absorbent liquid and a refrigerant in its vapor phase at low pressure in an absorber which provides, as an output, a liquid-rich refrigerant in solution with the absorbent liquid. The pressure of the absorbent/refrigerant solution is increased and the pressurized solution is supplied to a pervaporation membrane separator which provides as one output stream a vapor-rich refrigerant and as another output stream a concentrated liquid absorbent. The liquid-rich refrigerant output stream is condensed and subsequently expanded to a low pressure into an evaporator where it evaporates extracting heat from the spaced to be cooled. The concentrated liquid absorbent output stream from the separator is reduced in pressure and recombined in the absorber with the low pressure refrigerant vapor exiting the evaporator.

Abstract: A chassis dynamometer for testing motor vehicles in place includes a frame, at least one roll for engaging the wheel(s) driven by the vehicle engine and an eddy current brake/inertia unit in which the brake rotor is attached to one end of the roll to form an integral structure rotatably supported on the frame at each end of the structure.

Abstract: A universal test stand kit for supporting an internal combustion engine during tests includes a pair of side frame members having upper and lower pieces joined together by end pieces and laterally extending tubular stubs. The side frame members are joined together by tubular crosspieces telescopically received in the tubular stubs. A forward engine support assembly is slideably mounted on each side frame member so that the assemblies can be moved longitudinally to accommodate different sizes of engine. Each forward support assembly includes an elongated track which is laterally moveable and provided with apertures for receiving bolts which may be threaded into tapped bores in the engine block from which oil pan bolts have been removed. A rearward engine support assembly is mounted on the side frame members so that the assembly can be aligned with the rear end of the engine to be tested.

Abstract: A multiple flare-type compression fitting comprises a body member having a plurality of axially extending hollow nipples positioned adjacent one end (or both ends). One or more passageways within the body member communicate with the passageways in the nipples. A compression disk has cooperating stepped passageways with the enlarged sections arranged to surround the outer wall of an associated nipple with a flexible tube extending thereover, with the narrow sections accommodating the passage of the flexible tubes therethrough. The junction between the enlarged and narrow sections of each disk passageway form a relatively sharp corner for compressing a tube against the associated nipple when the disk is seated against the body member. The compression disk is rotatably carried by a nut which engages external threads on the body member so that when the nut is tightened the compression disk is in a seated position to secure the tubes in place.

Abstract: An endotracheal tube holder secures an endotracheal tube in a selected position within the patient's mouth and trachea and includes a tube holding block having an elongated cradle that extends inwardly of a patient's mouth. The holding block is formed having a tube clasp housing in which is located a plurality of tube securing pins, whereby the endotracheal tube is held in place by the securing pins and a pair of oppositely disposed flexible flange members which engage and hold the tube in a substantially fixed position with respect to the patient's mouth, and wherein a flexible biting block is interposed between the tube cradle and the tube clasp housing.

Abstract: A method and apparatus for resuscitating the cardiac/pulmonary activity of a patient includes the use of pneumatically controlled inflatable/deflatable cuffs secured over the patient's legs and abdomen and optionally the chest. The cuffs are preferably inflated and deflated at a cyclical rate of 10-40 cycles/min. with the inflation/deflation mode of the chest cuff, if used, being out-of-phase with the operation of the abdominal cuff. A ventilator and face mask may be used to supply breathable air to the patient's airway in conjunction with the cyclical operation of the cuffs.

Abstract: An electrical connector that includes a pair of hermaphroditic electrical connector members which are identically formed having a connector body supported within a flexible jacket, wherein the connector body includes a male plug and a female receptacle, whereby the first male plug of the first connector is positioned to be coupled to the second female receptacle of the second connector, and wherein the first female receptacle of the first connector is arranged to be coupled to the second male plug of the second connector when one of the connector members is inverted and latched to the opposing connector member.

Abstract: A demand valve resuscitator includes an inlet for connection to a pressurized source of breathable gas, such as oxygen, and an outlet for connection to a patient's airway. A normally-closed-pressure-actuated main valve is positioned between the inlet port and an inhalation chamber for controlling the demand mode of operation. A main valve controller operates the main valve in response to a reduced pressure in the inhalation chamber resulting from the commencement of spontaneous breathing by the patient. The manual operating mode, i.e., not dependent upon the patient breathing spontaneously, is controlled by a bypass valve which supplies gas to the patient independently of the main valve. A manually adjustable pressure relief valve sets the peak gas pressure. Another manual control permits the operator to preset the maximum opening of the bypass valve and therefore the flow rate of gas to the patient.