Abstract: A flexible corrugated tube comprising a succession of convolutions of spirally coiled thin metal strip having the overlapping corrugations of adjacent convolutions locked together by a plurality of spaced apart detents about the circumference of at least one of the sets of overlapping corrugations. Apparatus for forming the tube comprises a grooved roller in which at least one of the grooves comprises ridges extending a limited distance from the groove base toward the roller surface.

Abstract: A swimming pool lift installation for the handicapped employs a platform for carrying a wheelchair that is lowered and elevated with the platform so that a handicapped person can sit on his chair and be lowered into the pool for swimming away from the chair and can leave the pool by swimming back into the wheelchair. The chair is releasably secured to the platform so that there is no danger of it being rendered unstable by its buoyancy in the water and so that it can be wheeled on and off the platform. A water hydraulic system operates the lift to avoid contamination of the pool.

Abstract: A lip-type cartridge shaft seal has its toroidal body cavity filled with a silicone rubber adhesive sealant bonded to the main body of the seal. The silicone's adhesive properties and its lower hardness stabilize the body against collapse under intermittent or continuous high pressure forces without interfering with body flexibility.

Abstract: A portable comparator gage for cylinders having a self-supporting configuration with a high stiffness to weight ratio to minimize the contact force and therefore "spring open" of the gage when it is placed on a cylinder, and temperature compensation means to compensate for inaccuracies in the measurements of the relative deviation of the diameter of the cylinder resulting from variations in the temperature of the cylinder and gage from a nominal temperature.

Abstract: A device for planting a garden in straight rows comprising two stakes and a line held taut between the stakes, one end of the line being wound around a spool mounted to a clip of adjustable height on one stake and the other end of the line being affixed to a clip of adjustable height on the other stake. The device further comprises a distance measuring means attached to at least one of the stakes to locate the next row.

Abstract: An apparatus for automatic insertion of a valved bag of paper or other flexible sheet material on to a charging nozzle of a machine adapted to fill the bag with material in granular or powder form, in which the bags are fed from a supply thereof sequentially by means of a distributing device to an inserting device. The inserting device includes means for picking up a bag from the distributing device, means for opening the valve and for testing the operativeness of the valve, means for discarding a bag with an inoperative valve and means for feeding a bag with an operative valve to the charging nozzle of the bag-filling machine.

Abstract: A lip-type cartridge shaft seal has its toroidal body cavity filled with a silicone rubber adhesive sealant bonded to the main body of the seal. The silicone's adhesive properties and its lower hardness stabilize the body against collapse under intermittent or continuous high pressure forces without interfering with body flexibility.

Abstract: A small, light magnetic compass, in which the magnetic moment of the compass card is large relative to its weight, is adjustably mounted upon a member firmly coupled to the human head so that accurate compass bearings may be obtained, or a vessel steered, through an optical system presenting a magnified image of the compass card to the eye of the wearer.

Abstract: This system is economic and trouble free and has a cylindrical wall chamber formed on the top of an inverted water bottle that is elevated above the floor. A chamber communicates with the water bottle through a hole formed therein. Near the lower end of the cylindrical wall an opening is formed to allow a short tube to extend through the wall substantially tangent thereto. Above the tube and fixed to the interior of the wall is an apertured disc. Between the apertured disc and the bottom of the chamber is disposed a spiral wall with one end fixed to the cylindrical wall so that a spiral passageway is formed, communicating with the tube. Within the chamber is placed a piston which is free to slide axially up and down. Hanging from the underside of the piston is a rod which holds a valve gate disposed to seal the opening between the bottle and chamber. The rod also supports, on its lower end, a stopper or plug which is disposed to seal the neck of the bottle.

Abstract: A contour measuring apparatus including a stylus for contacting an outer surface of an object to be measured, a support arm having mounted at the distal end thereof of the stylus, a slider movable in parallel with the longitudinal directon of the support arm and oscillatingly movable and pivotally supporting the support arm about a horizontal axis perpendicularly intersecting the longitudinal direction of the support arm, a feed screw shaft threadably coupled to the slider so as to move the slider in parallel with the longitudinal direction of the support arm and a differential transformer mounted between the support arm and the slider.

Abstract: Apparatus for preventing an uncontrolled emission of gaseous hydrocarbons during the filling of containers, more especially tank wagons, with mineral oil products. It has an extensible fill tube so that product is discharged near the bottom of the container while vapors may be withdrawn through an annular passage surrounding the fill tube. The whole arrangement is carried on a trolley for longitudinal adjustment and there is a short lateral trolley to accommodate pivotal movement of the fill tube.

Abstract: An insulator having a universal configuration can be placed around many different types of steam traps. The insulator comprises a housing having suitable openings for water drainage and testing of the trap by an ultrasonic probe, and thermal insulation. Use of the insulator results in more efficient operation of the trap and saves energy. One of the outstanding features of the insulator is its ease of installation.

Abstract: A flux gate unit for producing an output representing the directional orientation of the unit with respect to the horizontal component of the earth's magnetic field, and in which a saturable flux gate magnetic core structure is mounted for leveling movement relative to associated flux gate coil means, in a manner enabling maintenance of the core structure substantially continuously in level condition while avoiding the necessity for leveling movement of the flux gate coils, and thereby avoiding the necessity for connection of electrical leads to a movable part.

Abstract: A phonograph cartridge replaceable stylus assembly is provided. The assembly comprises a housing having a nonmagnetic tube affixed thereto. The tube has a forward end and a rear end extending outwardly away from the housing. A nonmagnetic stylus arm extends through the tube forward end. A jeweled stylus is mounted to the front of the arm. The rear end of the arm passes through an elastomeric damper positioned within the tube. The damper serves as a universal pivot joint for the arm. The damper comprises a cylindrical member having a forward edge and a rear edge. The tube is crimped along a circular crimp line engaging the damper intermediate the forward and rear edges with the portions of the damper that do not engage the crimp also being free of the tube. A magnetic member is positioned within the tube secured to the arm and adapted to move therewith in response to motion of the jeweled stylus and following the grooves of a record.

Abstract: Mixing of liquids by passing through space delineated by body of revolution and surrounding co-operating casing in relative rotation, the co-operating surface of rotating part having plurality of grooves at angle less than 80.degree. to its axis and one liquid being fed to grooved surface at point distance by less than distance between body and casing, and the liquids being immediately thereafter fed through zone providing high grade dispersive mixing.

Abstract: A viewer is provided which is especially adapted for viewing dental X-ray films taken of the mouth of a patient. The viewer is provided with a throat extending inwardly from the front thereof which vertically divides the housing into upper and lower sections. A display screen is provided on the front of the upper section of the housing with a light compartment for a light source on the side thereof. The light source includes a dichroic filter for filtering out the infrared rays of the high intensity light provided and a condensing lens for projecting the visible rays down through a film located in the throat to provide an image bearing beam. In the lower section of the housing, a mirror located below the film horizontally reflects the image bearing beam through a projection lens onto a second mirror which directs the image bearing beam rearwardly and upwardly onto a rear mirror located on the upper section of the housing opposite the screen.

Abstract: A flexible hose comprising a soft hose main body, first helical rigid reinforcing means embedded partially or wholly in the soft hose main body and having a large cross sectional area, and second helical rigid reinforcing means embedded in the wall of the soft hose main body and having a smaller cross sectional area than the first helical rigid reinforcing means. The combination of the reinforcing means having different cross sectional areas gives the hose sufficient flexibility and strength against flattening and against pressure.

Abstract: A parallelepiped housing contains a displacement-transfer plate being slidable along the surface, and a pair of micrometer heads of the same shape and same size are mounted on a rear plate of said housing headed toward the front in said housing maintaining parallel and definite distance to one another.A differential lever is formed in such a length that the pivot parts at each tip of said pair of micrometer heads are rendered to serve as fulcrums, respectively, and a non-bisected part in the lengthwise direction of said lever is rotatably and pivotally supported as a point of application at the said displacement-transfer plate.A rectangular slider block is so constructed as to be guided along side plates and a base plate forming said housing, and is always pulled rearwards by a resilient means. Said slider block and said displacement-transfer plate are fastened via a determined space.Whereby coarse and fine adjustable displacements are realized at the displacement-transfer plate.

Abstract: A navigation aid consists of only three, namely first, second, and third indicia bearing members, the latter being respectively a transparent ground speed member bearing a ground speed scale having an origin, a transparent true air speed member bearing a true air speed scale having an origin, and a transparent wind speed and direction member bearing a wind speed scale and a wind direction indicator and having an origin, one of the first and second members bearing above the origin of its scale a compass rose which carries a drift scale which measures the angle between the ground speed scale and the true air speed scale, the three members lying in parallel juxtaposed planes, and only two connections being provided, one of the connections connecting two of the above members together at the origins of their scales by a connection having one rotational degree of freedom, and the other of the connections connecting the remaining member to one of the other two members at the origin of its scale by a connection havin

Abstract: A safety release pipe cap for emergency venting of fluids under excessive temperatures by melting out a replaceable portion. In one embodiment the replaceable portion is arranged to yield under excessive pressure differentials on its opposed faces. The cap is employed on tanks. A threaded ferrule is provided with a flange overlying the end of a pipe with which it is threadingly engaged to clamp the periphery of a separable disk of thermally fusible material against the pipe end. When the disk is of a yieldable plastic it functions as a seal gasket on the pipe end and will yield under pressure differentials to provide a visual indication of such differentials by material and wall thickness characteristics as well as the geometry of the disk. Temperature fusing can be controlled by these characteristics and particularly the melting temperature of the plastic.