Abstract: An apparatus and method for filtering air in residential and commercial applications is described herein. The air filter may have a support frame which secures to the intake grille of an HVAC system. A filter media may be placed in the support frame to filter air as it passes through the air filter. The filter media may be replaced when the filter media becomes too dirty to effectively filter air. The dirty filter media may be removed from the frame and a new clean media may be replaced in the frame.

Abstract: An apparatus and method for filtering air in residential and commercial applications is described herein. The air filter may have a support frame which secures to the intake grille of an HVAC system. A filter media may be placed in the support frame to filter air as it passes through the air filter. The filter media may be replaced when the filter media becomes too dirty to effectively filter air. The dirty filter media may be removed from the frame and a new clean media may be replaced in the frame.

Abstract: To facilitate positioning of a drill bit and alleviate burden to a user, a medical drill machine including a drive shaft gripping a drill bit, a casing constituted of X-ray transparent material and capable of housing the drive shaft, and a force transferring mechanism for transferring rotational force to the drive shaft is provided. In this medical drill machine, a first guide and a second guide constituted of X-ray opaque material are fixed at given positions along an axial direction of the drive shaft in the casing. Both guides are arranged coaxially with the axis of the drive shaft, and are formed in mutually different shapes. A slant direction of the drill bit can be recognized from any relative misalignment of the mutually different shapes of the guides included in an X-ray image along the ideal axial line.

Abstract: A child safety seat for use in combination with a vehicular seat includes a retractable harnessing apparatus for securing the child safety seat to the vehicular seat. The retractable harnessing apparatus has a safety strap retractably extending out from the strap housing, and is integrally mounted within the child safety seat. The retractable harnessing apparatus further includes a locking mechanism for responsively locking the safety strap in a fixed degree of extension from the housing upon incursion of a sudden force urging the safety strap out from the housing.

Abstract: An improved hand-held towel structure suitable for cleaning and drying athletic apparatus and other implements in wet weather is described. The towel structure includes an outer layer of towel material having a first predetermined absorbency which is separated from an inner layer of wiping material having a second predetermined absorbency by a film layer that substantially inhibits transfer of water from the towel material to the wiping material. The improved towel structure is arranged such that the outer layer of towel material may be utilized for wiping and cleaning the athletic equipment or other implements, while the film layer inhibits transfer of any soil or water to the inner wiping layer. The structure substantially defines an inner pocket open at the bottom in which the athletic equipment or other implements can be inserted for further wiping and drying. Various structures for retaining the elements of the towel structure in position relative to each other are described.

Abstract: A quickly applied preformed gift wrap to a carton, the wrap having pre-scribed fold lines sequentially numbered for folding about a carton and shielded adhesive strips to secure overlapping edges of the folded portions.

Abstract: An electro-optical gaging system which comprises a linear array of photo-sensitive diodes where the thickness of an object against a dark background is measured by determining the number of diodes which are discharged due to light incident thereon from the object. Each diode of the array is sequentially scanned during a scanning cycle to recharge the capacitance of the discharged diodes and the number of charging pulses is a measurement of the thickness of the object. A separate photo-sensitive element senses the light conditions and generates pulses which determine the repetition rate of the scanning cycle to maintain system calibration. A start scan signal is also utilized to determine that the light intensity is within predetermined limits.

Abstract: A printer is disclosed for use in printing indicia or the like on a sheet of recording medium by selective application of impulses of fluid. The printer comprises a sheet support mechanism, a print head, fluid supply means, a valve assembly, and an input system. The support mechanism supports and selectively advances the sheet of recording medium. The print head includes a one- or two-dimensional array of tubes arranged to form a dot matrix for printing alphanumeric characters on the sheet. It may extend the width of the recording medium or be movable across it. Connected to these tubes are the fluid supply means and a valve assembly that includes a separate valve for each tube for controlling the supply of fluid thereto. In one embodiment of the invention, a heater raises the temperature of the fluid passing through the tubes enough that printing takes place on the recording medium whenever the fluid is ejected from the tubes.

Abstract: An epilator comprising a radio frequency signal generator, a high impedance hair gripper, and a shielded transmission line therebetween. The transmission line has a length of 0.15 to 0.50 of a quarter wave length greater than an odd quarter wave length of the signal considering the velocity factor of the line, and a variable impedance matching network is disposed between the signal generator and the gripper.