Abstract: A jersey for motorcycle racing or other strenuous activity, with perspiration absorbent and cooling cuffs attached to the ends of the sleeves. The cuffs, which are formed from a resilient material, extend over the wearer's wrist to absorb perspiration running down the arm. The inner faces of the cuffs are made from an absorbent, uncut pile such as terry cloth, while outer cuff layers are formed from a ribbed backing material. A similar perspiration absorbent neck is also provided.
Abstract: A method and apparatus is disclosed for the reproduction of a sound signal recorded on a variable density optical sound track negative, in which the amount of light transmitted through the sound track is related to its exposure by a predetermined relationship. Light transmitted through the sound track is transduced to an electrical signal having a magnitude which varies in accordance with the amount of transmitted light, and this signal is operated on by a function which is substantially equivalent to the inverse of the predetermined relationship to produce an output signal which directly corresponds to the exposure of the sound track. An adjustment mechanism is provided to eliminate distortion and to enable the production of an accurate output signal even when the relationship between the light transmission and exposure of the sound track is unknown.
Abstract: The locally averaged or approximate D.C. value of a variable area optical sound track on a film is first determined, and this information is then used to control the width of a scanning slit at a playback station. The scanning slit width is reduced for small signals and increased for large signals, thereby reducing the amount of non-information bearing area on the film which is included in the scanned area. This in turn reduces the amount of noise from dirt and debris in the non-information bearing area, and by reducing the total amount of light transmitted through the film also lowers the level of quantum noise from the photodetector employed at the playback station.
Abstract: A watch protector has a guard member extending across the face of the watch and two ring members, each attached at an end of the guard member. Each ring member has a cross-piece extending between opposite sides of the ring member for dividing the ring member into two openings, one closer to the guard member, and the other more distant from the guard member. At least one of the openings of each ring member receive portions of the watch band. The guard member having a vertical dimension extending upward from the face of the watch greater than the vertical dimension of the ring members when the ring members are aligned with the guard member for added protection.
Abstract: A vented motorcycle boot in which air scoops are provided at the upper side and the front of the boot, with air ducts running down along the sides of the boot from the scoops to the ankle area. A cooling flow of air is established through the scoops and ducts to the most sensitive portion of the foot, while the location of the scoops toward the top of the boot minimizes the amount of dirt or water than can enter the ventilation system. The side scoop faces forward and collects relatively large quantities of air, while the front scoop faces toward the side and promotes circulation by either collecting outside air or venting inside air, depending upon the particular construction of the scoop and the riding conditions. Plugs are provided to close off the scoops in case of particularly muddy conditions.
Abstract: The therapy table has a supporting surface for supporting a patient. A carriage below the supporting surface carries a roller mechanism that acts on the body. A motor translates the carriage relative to the supporting sruface, and the patient. A counterbalance arm including a mass mounted on the arm urges the rollers against the patient at a predetermined force. The mass is adjustable along the counterbalance arm to adjust the movement of the mass acting on the counterbalance arm for adjusting the force of the rollers against the patient.
Abstract: An output circuit amplifier has first and second stage amplifying transistors with an impedance circuit connected between the base of the first stage transistor and the collector-emitter circuit of the second stage transistor to draw current from the first stage transistor base, thereby keeping both transistors out of saturation. The impedance circuit establishes a voltage drop between the two transistors such that large output voltage swings are enabled at an output terminal connected to the second stage transistor. The collector-emitter circuit of the first stage transistor is connected directly to a positive voltage bus to avoid further saturation problems.
Abstract: An analog multiplier circuit for multiplying X and Y input voltage signals and using two differential amplifiers to produce a multiplied output, in which separate pairs of transistors provide base drive currents to the amplifier transistors, one pair being associated with each amplifier. Trimming voltages are applied between the bases of each transistor pair to independently adjust the base voltage offsets. Nonlinearities between the multiplier output and the X input are reduced by appropriate trimming of the transistor base voltage differentials. Each of the differential amplifier transistors has a common base connection with a matching transistor that carries a current which is complementary to the amplifier transistor current with respect to the Y input signal, thereby reducing output nonlinearities with respect to the Y input signal by making the total base drive currents of both transistors substantially independent of the Y voltage signal.
Abstract: A casing scraper for well casings in which the scraper blades are positively held on the scraper body. The blades are provided with retainer arms which engage a series of splines formed integrally with the scraper body, and slide up the splines to a cutting position. The blades are held in place by a retainer ring which has two sets of threads, with a gap in between the two sets. The lower set of threads normally engages annular threading on the scraper body to bear against the lower end of the blades and hold them in place. If the ring becomes partially unscrewed, the gap between the two sets of threading tends to resist further disengagement, and the ring remains sufficiently in place to prevent the blades from unloading. The orientation of the ring threading and of the annular threading is also reversed from the scraper's direction of rotation in normal use, so that under normal rotation the ring is urged to rotate more tightly against the blades, rather than to unscrew.
Abstract: A vented racing glove suitable for motorcycle use in which a flexible protective pad is attached over the top of the gloove. The pad has various integrally formed upstanding air scoops which receive air when the glove is in motion to provide positive ventilation to its interior, and protect the wearer's hand in case of a fall. Ventilation grills are also provided in the pad in the form of parallel upstanding ribs with vent openings in the pad between adjacent ribs. The grills likewise provide both ventilation and protection. The fingers of the pad include forward facing air scoops behind the finger joints and rearward facing air scoops forward of the finger joints, with the air inlets of both scoops facing forward when the wearer grips a motorcycle hand grip.
Abstract: A heat exchanger changes the temperature of a predetermined area of the skin at a programmed rate preferably by cooling. The rate at which the area of skin changes in response to temperature change of the heat exchanger and the rate the skin temperature returns to normal are then measured and compared to standard rates over a number of cycles. Impaired peripheral blood flow is evident especially on subsequent cycles as vascular disease slows the rate of return to normal temperature of the skin. The heat exchanger has a cooling chamber with one side of the chamber being a cooling surface adjacent to the skin. An injector is connected to a source of fluid having a boiling point at ambient pressure less than the temperature to which the skin is to be cooled and greater than ambient temperature of the apparatus. The injector injects fluid into the chamber and onto the side of the cooling surface opposite the skin to boil the fluid on the surface to cool the surface and the skin.
Abstract: A fishing leader is threaded through a worm or worm-like bait as follows. In one form, an elongated, narrow diameter tool is inserted at an entrance point near one end of the bait and pushed longitudinally through the bait until it exits near the other end of the bait. The end of the leader opposite the fish hook is attached to the tool, and the tool is withdrawn from the bait, which pulls the leader through the bait with the hook near the exit point and the end of the leader opposite the hook, through the entrance point where it can be connected to fishing line. In the other form of the tool, the end of the leader opposite the hook is first attached to the tool and then the tool and the leader are pushed through the worm in the opposite direction until the fish hook is near the entrance point of the tool and the other end of the leader is out of the exit point of the tool. The tool is then withdrawn from the worm leaving the leader in place.
Abstract: A head cleaner includes a generally flat, rectangular sheath 10 formed of flexible top and bottom walls 11 and 12 as is standard in floppy disk construction. The magnetic disk that would be within the sheath is replaced by a flat, absorbent member 17 which has an opening 18 such that it can be mounted on the hub of a disk drive. One of the walls of the sheath has an aperture 22 through which head 34 can extend and contact the absorbent member. A liquid solvent is applied in the aperture to the absorbent member to dissolve built up oxides on the head. The aperture is made wider than standard apertures for floppy disks, and there are additional apertures on other edges of the sheath for providing additional windows. Other windows may be through the other wall of the sheath such that there are eight total windows in the head cleaners. Therefore, the head cleaner can be inserted into the disk drive with any edge leading and with either wall on the head side of the drive.
Abstract: A connector for connecting together two ends of a fluid-carrying line comprises two coupling halves. The female half includes a cylindrical female housing. A support sleeve is concentric with and mounted around part of the female housing, and the forward end is threaded to receive the male half. An actuator sleeve is around the support sleeve. A movable locking member in the form of balls are seated in opening through the support sleeve against the actuator sleeve. A trigger ring inside the support sleeve slides between a blocking position under the balls and an unblocking position releasing the balls. One surface of the actuator sleeve urges the balls against the trigger ring. The threaded forward end of the male half engages the threads of the female half. A nose section on the male half, which extends forward of the threads, engages a trigger actuator ring in the female half.
Abstract: A collapsible camper has a container mounted on the top of a pick-up truck cab. The container is formed from a cover having a rear, generally vertically wall and an upper, horizontal wall pivoting to a base. A front wall also pivots with respect to the base between an angled position and a vertical position. A foldable canopy is stored within the container cavity. To deploy the canopy, the cover is pivoted so that the generally vertical portion of the cover extends downward below the base, and the horizontal portion of the cover extends horizontally to act as a shelf, a U-shaped brace mounts between the canopy and the side walls of the pickup truck. A side wall of the container folds downward so that the top surface of the base is wide enough to be a sleeping surface, and its downward pivoting and the upward pivoting of the front wall are accomplished by a single linkage.
Abstract: A digital control amplifier is provided as a unitary monolithic device to control the transfer function of an analog signal in response to a digital control, such as from a digital computer. A current transfer cell is employed which uses an amplifier circuit having transistors of like polarity, and is capable of both attenuation and greater than unity amplification of an input analog signal. A digital-two-analog converter is integrated into the system and employs a series of current dividers which enables a common reference current to be used for each bit of the converter. A current reference circuit for the converter employs a band gap voltage regulator with a temperature compensation design that varies the control signal applied to the current transfer cell to compensate for temperature-induced variations in the output of the cell.
Abstract: A JFET differential amplifier stage in which the gate-drain voltage of each JFET is kept at least as great as the pinchoff voltage (V.sub.p), but preferably close to V.sub.p so as to reduce the effects of impact ionization and generation currents on the amplifier's input bias currents. The JFETs are supplied with currents which force their gate-source voltages to at least 0.5 V.sub.p. A second pair of JFETs are cascoded with the first pair and also develop gate-source voltages of at least 0.5 V.sub.p. The gate-source terminals of the second pair are connected in a loop with the source-drain terminals of the first pair, thereby forcing the gate-drain voltages of the first pair to at least V.sub.p, the minimum voltage necessary to hold the first pair in a desired saturated state. A third pair of JFETs is connected to buffer the first pair from capacitances developed at the gates of the second pair without effecting the AC operation of the circuit.
Abstract: A device for transporting infant supplies and for supporting an infant includes a main body that has upright walls extending from a base for forming a central cavity. The top of the cavity is closed by an upper support surface. A portion of at least two of the walls extend above the upper support surface, and the infant support member of two table members hinged relative to each other are mounted on the infant support surface. The shafts about which the tables hinge extend outward and engages slots in portions of the upright walls above the support surface. The table members slide through their connection with the hinge shafts through the slot. At one end of the slot when the table members are folded over each other, the table members are nested above the main body. At the other end of the slot, when the table members are open, the central pivot is generally centrally located on the main body to prevent tipping of the device.