A method and pharmaceutical compositions are disclosed for reducing oxidative degradation of 17 .alpha.-ethinylestradiol comprising combining the estradiol with an effective amount of cyclodextrin, thus forming a cyclodextrin clathrate of the steroid.

A method of producing a lamp having a coated layer and of a type in which linear tubes in parallel are interconnected, comprises the steps of forming a connected glass tube by making an airtight connection via connecting portions between side walls of a plural number of glass tubes having openings at both ends and main portions that are linear and arranged parallel to each other; of forming a coated layer on the inner wall surface of the connected tube including the connecting portions by introd...

A dental handpiece of the present invention is provided with a head extending at substantially a right angle to said handpiece having a hollow therein. The head is also provided with a hollow vertically communicating with the hollow of the handpiece. A semispherical groove is cut into the hollow wall longitudinally and partially adjacent an orifice of the head. A cartridge having an elongated opening cut through at a mid-portion of a bottom thereof and also a small opening at a top wall near a l...

A nonconducting pipe thread lubricating composition for use in a drill string capable of transmitting electrical signals from a downhole location to the surface of the earth. The composition includes hard and soft moderately deforming materials such as polyphenylene sulfide and talc, and a lubricating solid such as polytetrafluoroethylene dispersed in a viscous lubricating base preferably a lithium based grease.

An apparatus for rapidly cleaning and removing plaque and calculus from the teeth without damage to the enamel and injury to the gums, consisting of a device for hand manipulation containing an electronic ultrasonic transducer coupled to a quick-replaceable cleaning applicator formed from wear-resistant plastic material. The handle of the device includes channel means for conducting a flow of pressurized water to the applicator. The device is coupled to a source of electronic ultrasonic energy a...

The invention relates to a feeding device for a wrapping machine for making fillers or cigars comprising at least two cutting beds interchangeable in place and adapted to cut a bunch leaf or wrapper, said beds being alternately displaced from a position for receiving a tobacco leaf to a leaf cutting position following the former in the direction of passage for delivering the bunch leaf or the wrapper to a wrapping mechanism and conversely. The invention has for its object to provide a machine of...

A high-pressure discharge lamp, in particular a mercury-free high-pressure discharge lamp for a vehicle headlight, has a lamp base (1) and an axially symmetrical discharge vessel (30), in whose discharge space (300) an ionizable filling, containing metal halides, and electrodes (31, 32) are arranged for producing a gas discharge. The discharge vessel (30) is provided with transparent, partial frosting (37), which is limited to a section of the inside or outside of the discharge vessel (30) exten...

A fuel cell apparatus includes a heat exchange unit including a laminated structure, a water entrance provided at the laminated structure and through which the water from the hot water storage unit flows into the laminated structure, and a water exit provided at the laminated structure and through which the water is discharged out of the laminated structure after the water passes through the laminated structure. The laminated structure is integrally formed into lamination by a heat exchanger for...

A batter timing practice apparatus including a telescoping handle having a tethered ball attached. In use, the ball is set in motion by an operator and directed toward a practicing batter, the object being to simulate a variety of pitches for actual hitting practice under limited resource conditions. The telescoping handle provides a safe standoff for an operator and collapses to a lightweight, portable unit transportable along with bats and related baseball equipments. An alternate embodiment i...

A heat supply and electric power-generating fuel cell, has a water-circulation system including a fuel cell body with a water flow path for controlling the temperature of a cell reaction to a proper temperature. A water vapor separator cools water passed through the water flow path of the fuel cell. A recovery heat exchanger supplies heat to users which corresponds to the difference between the temperature of the water cooled by the separator and the proper temperature of the cell reaction when ...