Abstract: A plurality of cuff rings for an endotracheal tube for intubation of a trachea. At least one of the cuff rings is inflatable and deflatable independent of the other cuff ring so that at least one of the cuff rings may always remain inflated to maintain an airtight seal between the cannula of the endotracheal tube and a patient's trachea. Each cuff ring is successively inflated and deflated during the period the endotracheal tube is in a patient's trachea, thereby intermittently relieving the trachea of pressure on its inner wall. The intermittent relief of pressure by periodic deflation of each cuff ring reduces damage to the trachea. The cuff rings each have a surface associated therewith to lubricate the area of the trachea in contact with the cuff ring to substantially reduce the occurrence of damage to the trachea from abrasion by the cuff rings.

Abstract: The oxygen-fuel torch includes a torch body having fuel gas and oxygen conduits for conducting the respective gas to the torch head and therethrough to a torch tip. The torch tip is connected through an adaptor to the torch head and includes an elongated tip stem that is joined to an arcuately curved tip head. The tip head extends angularly through an angle of at least about 245 degrees and has three outlet orifices opening toward a common point to direct three flames to substantially surround tubing for soldering or otherwise heating. If three orifices are provided, the orifices are angularly spaced about 120 degrees from one another.

Abstract: A display assembly constructed of corrugated paperboard comprising two triangular vertical end columns with a center wall supported therebetween for affixing materials to be displayed and a header member affixed to the top of the two end columns and extending therebetween to provide lateral stability and serve as an additional display area. The display is manufactured to be delivered to the user in a flat knocked-down folded condition. The display is designed to be easily assembled by the user at the point of use without any tools or connectors other than those that are a part of and integral to the corrugated panels which are assembled to form the display.

Abstract: A Radar Altimeter signal presence circuit which provides improved useable system sensitivity for a given false track probability by providing an improved method for detecting the adequacy of the return signal. This return signal is composed of many small, rapidly changing reflections that vary between additive and substractive combination giving the net return the characteristic of noise. A non-linear detector is used to enhance the signal presence detectors sensitivity to weak but adequate returns while (1) reducing the ability of short periods of strong returns to cause a positive signal presence indication when the overall signal is inadequate, and (2) retaining a high sensitivity to periods of signal fades that produce measurement errors. This is accomplished by using a non-linear detector that reduces the effect of strong returns when the many small reflections tend to combine additively, and increases the effect of weak returns when the many small reflections tend to combine subtractively.

Abstract: A Radar Altimeter static accuracy circuit which provides improved system accuracy when the altimeter platform is stationary over the ground. Most often this stationary condition occurs in helicopters while hovering at low altitudes but also occurs, for example, in altimeters used to measure the level of grain in elevators. The altimeters output, a voltage proportional to altitude, is used to control a voltage controlled oscillator (VCO), the output of which is summed into the receiver intermediate frequency (IF) amplifier output to fill in the return signal fades. These fades otherwise cause altitude processor errors leading to erroneous altitude measurements. The VCO is adjusted to produce an output frequency equal to the IF amplifier output frequency.

Abstract: A temperature responsive pneumatic control device comprising a receptacle containing a temperature responsive fluid therein, the receptacle being in open communication with a first diaphragm which in turn is in movable communication in a piston capable of being displaced by movement of the diaphragm, the piston being in communication with a rod attached to a second diaphragm and extending on both sides thereof such that the end of the rod downstream from the diaphragm is in communication with an air supply valve, which upon displacement gives a pneumatic signal to a pneumatic device such as a ridge vent in a building.

Abstract: A wheeled land vehicle propelled by a rowing or sculling motion of a rowing member pivotally extending from the frame thereof which is in operative connection with the rear drive wheel. Front wheels are journalled from each side of the frame and are steeringly connected to each other and operatively connected to foot pedals mounted on the frame.

Abstract: An active ridge vent designed for providing varying degrees of ventilation at the ridge of a building such as a livestock building. An arm in combination with a triangular member, a linkage, and a channel allow the opening created by two opposed doors which are hinged to the open peak of a gable roof to vary. The opening is designed to vary in accordance with the temperature level in the livestock building.

Abstract: A composition, which when mixed with water, is capable of providing a colorant solution for coloring natural casings, comprising an effective amount of at least one antioxidant, an effective amount of a preservative capable of minimizing the deterioration of the casing, and a dye system for coloring the casing.

Abstract: A pneumatic wall-vent closer for use in a thermal-pneumatic automatic temperature control system. The system is used to maintain constant temperature in livestock confinement buildings. The wall-vent closer attaches between the sill of a wall-vent in a confinement building and the wall-vent. As the temperature in the confinement building varies, the pneumatic wall-vent closer automatically opens and closes the wall vents to allow more or less air into the confinement building to maintain a pre-set stable temperature.

Abstract: A cardiovascular exercise machine used for simulating the motions of cross-country skiing including a means for providing arm and leg resistance in the forward as well as the backward direction, thereby allowing the user of the exercise machine to achieve a higher heart rate more easily than is achievable with cross-country skiing or other exercise machines. The apparatus includes a frame; two skates cabled together for rolling movement on separate tracks with a means for providing drag on the cable, the skates, tracks and drag means being mounted on the frame; and two pole carriage assemblies having floating brakes which provide frictional engagement during travel along opposed side rails.

Abstract: A water-steam separator to be used in conjunction with a steam humidifier system used to maintain the relative humidity within a desired range in buildings. The water-separator comprising a body in the form of a closed cylindrical tank with a top end and a bottom end. The water-steam separator also comprises a flow diverter internal to the body which divides the body into a condensate area and an inlet-outlet area; the flow diverter extending substantially from the top end of the body to the bottom end of the body. A partition further divides the inlet-outlet area into a separate outlet area and a separate inlet area. The water-steam separator is fitted with a water drain, a water steam inlet, and a steam outlet.

Abstract: A board game wherein the playing board has color-coded sides and color chips having each side color-coded are placed by opposing players on the playing board adjacent to other color chips and the color-coded sides of the board so that the colors of each adjacent chip match one another and so that the color of each chip which is adjacent to a color-coded side of the board also matches the color-coded side.

Abstract: An improved orthopedic appliance for correcting a Class II malocclusion comprising an acrylic anterior segment molded to fit the lower mouth and dentition and two acrylic posterior segments molded to fit the upper mouth and dentition of a patient and an expansion screw connecting each posterior segment to the anterior segment for expandible movement between the anterior segment and the posterior segments. A method of correcting a Class II Division 1 malocclusion using an expandable but otherwise conventional orthopedic appliance. The appliance is expanded in stages to maximize the utilization of corrective lower jaw movements which result from the anchoring of the orthopedic appliance in the patient's upper mouth.

Abstract: A segmented labial bow with lip pads for use in the correction of Class III malocclusions and malocclusions with underdeveloped maxillas. The segmented labial bow with lip pads is attached to a conventional orthopedic/orthodontic appliance. As the orthopedic/orthodontic appliance is activated, the lip pads on the segmented bow hold the upper lip away from the roots of the maxillary anterior teeth and alveolar process allowing skeletal development of the premaxillary area with resultant forward movement of the roots and alveolar bone of the premaxillary teeth.

Abstract: A dispenser for a pad of advertising materials for dispensing and presentation on a one-by-one basis. The dispenser includes a hanger for supporting the sheets of advertising material. The hanger is attached to the sheets by a pivot through the sheets and the hanger so that the hanger can be rotated 180.degree.. In a first position, the hanger is engaged with a price channel as is commonly used in retail outlets. The hanger uses a tab punched into the hanger to engage the price channel when it is in this first position. Upon rotation of the hanger on the pivot 180.degree. to the second position, the hanger is attached to a vertical surface by an adhesive strip affixed to the rear of the hanger.

Abstract: Two-wheel cart including a 55-gallon oil drum having a tapered opening which restricts unwanted discharge in the standing position of wood such as fire logs and a cart frame with two wheels and a handle. The drum is fixedly mounted to the cart frame thereby providing a body member in which logs are capable of nesting for transportation.