Ykk Corporation

Other

Takeshi Taniguchi

Junichi Nagahora

Kazuo Omiya

Akihisa Inoue

Hideki Takeda

Etsuji Sugita

Hidenobu Nagahama

Masayuki Kobayashi

Shigeo Nomiya

Shinichiro Tochio

Toshio Arai

A device includes a governor for controlling the frequency of the generator of a private power generation equipment, function generating means having a function characteristic for detecting the frequency variation rate of the generator and outputting a large output to the value thereof, effective power adjusting means for outputting an output proportionate to the signal, and protective relays for sensing abnormality of the frequency variation rate of the generator, so that, by making the signal in which an output from the function generating means and an output from the effective power adjusting means are synthesized an instruction signal of the governor, and shifting the frequency variation rate of the generator to a level sensed by the protective relays by the function characteristic of the function generating means at the power outage on the alternating current power line side, to detect the power outage on the alternating current power line side.

Line linkage protective device for electricity generation equipment

A conversion adapter to be used for connecting opposed optical connector ferrules having different diameters is formed of an amorphous alloy possessing at least a glass transition region, preferably a glass transition region of not less than 30 K in temperature width. Particularly, the amorphous alloy of M &mdash;M system or M &mdash;M &mdash;La system (M : Zr and/or Hf, M : Ni, Cu, Fe, Co, Mn, Nb, Ti, V, Cr, Zn, Al, and/or Ga, La: rare earth element) possesses a wide range of &Dgr;Tx and thus can be advantageously used as a material for the conversion adapter. Such a conversion adapter can be manufactured with high mass-productivity by a mold casting method or molding method.

Conversion adapter for ferrules having different diameters and method for production thereof

A grooved substrate which has a groove for aligning or positioning an optical fiber therein and which can be advantageously used in a multifiber optical connector or for aligning a multiple optical fiber is formed of an amorphous alloy possessing at least a glass transition region, preferably a glass transition region of not less than 30 K in temperature width. Particularly, the amorphous alloy of M &mdash;M system or M &mdash;M &mdash;La system (M : Zr and/or Hf, M : Ni, Cu, Fe, Co, Mn, Nb, Ti, V, Cr, Zn, Al, and/or Ga, La: rare earth element) possesses a wide range of &Dgr;Tx and thus can be advantageously used as a material for the grooved substrate. Such a grooved substrate can be manufactured with high mass-productivity by a metal mold casting method or molding method.

Grooved substrates for multifiber optical connectors and for alignment of multiple optical fibers and method for production thereof

Optical connector ferrules and method for production thereof

Sleeve for optical connector ferrules and method for production thereof

An apparatus for producing a formed article of amorphous alloy by a simple process are disclosed. A molding apparatus comprises a forced cooling casting mold which is provided with a sprue and at least one molding cavity communicating with the sprue and further with a cutting member disposed in the casting mold movably in the direction of the sprue, a melting vessel movable in the direction of the sprue, and a molten metal transferring member disposed slidably in the melting vessel or the molding cavity of the casting mold. A formed article of amorphous alloy is obtained by melting an alloying material in the vessel, forcibly transferring the resultant molten alloy into the molding cavity by means of the molten metal transferring member and meanwhile exerting pressure on the molten alloy, rapidly cooling and solidifying the molten alloy in the casting mold thereby conferring amorphousness on the alloy and meanwhile gradually cooling and solidifying the molten alloy in the part of the sprue of the casting mold thereby crystallizing the alloy in that part, cutting the part which has been embrittled by the crystallization by means of the cutting member, and thereafter separating the melting vessel from the casting mold.

Method and apparatus for production of amorphous alloy article formed by metal mold casting under pressure

Disclosed are ferrules for an optical fiber connector provided with an insertion hole for setting an optical fiber in position and methods for the production thereof. The ferrule is formed of an amorphous alloy possessing at least a glass transition region, preferably a glass transition region of not less than 30 K in temperature width. Preferably the ferrule is formed of an amorphous alloy having a composition represented by the following general formula and containing an amorphous phase in a volumetric ratio of at least 50%:

Ferrule for optical fiber connector and method for production thereof

A method and apparatus for producing a formed article of amorphous alloy by a simple process are disclosed. A molding apparatus comprises a forced cooling casting mold which is provided with a sprue and at least one molding cavity communicating with the sprue and further with a cutting member disposed in the casting mold movably in the direction of the sprue, a melting vessel movable in the direction of the sprue, and a molten metal transferring member disposed slidably in the melting vessel or the molding cavity of the casting mold. A formed article of amorphous alloy is obtained by melting an alloying material in the vessel, forcibly transferring the resultant molten alloy into the molding cavity by means of the molten metal transferring member and meanwhile exerting pressure on the molten alloy, rapidly cooling and solidifying the molten alloy in the casting mold thereby conferring amorphousness on the alloy and meanwhile gradually cooling and solidifying the molten alloy in the part of the sprue of the casting mold thereby crystallizing the alloy in that part, cutting the part which has been embrittled by the crystallization by means of the cutting member, and thereafter separating the melting vessel from the casting mold.

Growing community of inventors

Sendai, Japan

Takeshi Taniguchi