Citizen Watch Company, Ltd.

Nippon Mayer Ltd.

Technical Research of Citizen Watch Co., Ltd.

Takanori Nanya

Katsuo Nishimura

Takayasu Machida

Kazuo Suzuki

Shigeyuki Takahashi

Eigo Hashimoto

Takeaki Shimanouchi

Yoshitsugu Shibuya

Yukio Miya

Yasushi Murata

Mitugu Enomoto

Masahiro Sato

Fukuo Sekiya

Heihachiro Ebihara

Osamu Sugiyama

Yuji Fukazawa

Koichi Naoi

Junji Sato

Shinji Ikeda

Shotaro Shimizu

Shigeru Kizaki

Misao Uchino

Mitsugu Enomoto

Nobuyuki Yoshino

Kenji Hanai

Sigeru Watanabe

Kenji Kamiya

Hiroshi Tagawa

Akiteru Hatayama

Hideo Shinomiya

A stator ( ) is made up by bonding a first stator part ( ) made of a high-permeability material to a second stator part ( ) made of a high-permeability material respectively by welding through the intermediary of connections ( ) made of a low-permeability material or a nonmagnetic material, interposed therebetween. Paired recesses ( ) serving as holding torque setting means for holding a rotor ( ) by a magnetic action are formed on the inner periphery of a rotor hole ( ) defined inside the stator ( ) at the position forming an initial phase angle (&thgr; ). A field coil ( ) for excitation is magnetically bonded to opposite ends of the stator ( ), thereby forming a two-pole step motor for a timepiece.

Two-pole step motor for timepiece

A stator ( ) is made up by bonding a first stator part ( ) made of a high-permeability material to a second stator part ( ) made of a high-permeability material respectively by welding through the intermediary of connections ( ) made of a low-permeability material or a nonmagnetic material, interposed therebetween. Paired recesses ( ) serving as holding torque setting means for holding a rotor ( ) by a magnetic action are formed on the inner, periphery of a rotor hole ( ) defined inside the stator ( ) at the position forming an initial phase angle (&thgr; ). A field coil ( ) for excitation is magnetically bonded to opposite ends of the stator ( ), thereby forming a two-pole step motor for a timepiece

2-Pole stepper motor for timepiece

A pair of parallel rectangular windows are punched out in a thin sheet base material having the same thickness as that of a short hand part ( ) including a weight part ( ) of a second hand ( ) so as to form a hand forming part between the pair of windows and a part in the hand forming part forming a long hand part and a mounting part of a hand is pressed so as to form a thin wall part. Then, the second hand in a final shape is punched out from the base material so that a long hand part ( ) and a mounting part ( ) are formed with the thin wall part of the hand forming part and the short hand part ( ) is formed with an original thickness part. Consequently, the second hand for an analog electronic timepiece in which the weight part ( ) is provided on the short hand part ( ) can be easily and securely manufactured only by a press working.

Method of manufacturing hand for analog electronic timepiece

In an analog electronic timepiece in which the rotation of a rotor ( a) step motor ( ) is decelerated through train wheels before it is transmitted an hour hand ( ) and a minute hand ( ), the gravity center of a center wheel composed of a center wheel gear ( ), a center wheel pinion ( ), and a center wheel shaft ( ) to which the minute hand ( ) is mounted is displaced from the axis of the center wheel shaft ( ) to within an angle range of less than &plusmn;90&deg; with respect to the opposite direction to a direction in which a time indicating part ( a) of the minute hand ( ) extends so as to reduce a moment on the center wheel shaft ( ) caused by a combination of the minute hand ( ) and the center wheel. This makes it possible to prevent a hand-skip due to disturbance even if the value of holding energy of the step motor ( ) is reduced.

Analog electronic timepiece

Disposing the titanium or titanium alloy in a vacuum vessel, and applying annealing treatment thereto by heating (a heating process); feeding a mixed gas consisting primarily of nitrogen with a trace of oxygen component into the vessel, and heating inside the vacuum vessel at temperatures in the range of 700 to 800&deg; C. in a predetermined reduced pressure condition for a predetermined length of time such that nitrogen and oxygen are diffused into the interior of the titanium or titanium alloy from the surface thereof so as to pass into solid solution therein (a hardening treatment process); and cooling the titanium or titanium alloy to room temperature after the hardening treatment process (a cooling process), are carried out. After completion of the processes described above, a hard surface layer,is formed in the surface region of the titanium or titanium alloy,The hard surface layer,comprises a first hard layer,where nitrogen atoms,and oxygen atoms,reside in solid solution, and a second hard layer,where oxygen atoms,reside in solid solution.

Titanium or titanium alloy member and surface treatment method therefor

Solar battery device and method of fabricating the same

Dents for reed in high-speed weaving machine, and method of

Solar battery device

Coated knitting parts of knitting machine

Knitting parts of knitting machine

A diamond-like carbon (DLC) film is formed on a portion of a reed blade in a high-speed loom which requires the highest wear resistance. When a stainless steel is used as the base material of the reed blade, the DLC film is formed through an intermediate layer comprising, e.g., a titanium carbide layer. Reed blades coated with a DLC film are arranged at the side portions of the reed where wear progresses quickly, while reed blades coated with hard films requiring a relatively low cost, or non-coated reed blades, are arranged in the central portion of the reed, thereby uniforming the blade wear throughout the entire reed. The reed is suitable to many types of fibers, ranging from natural to synthetic and new material fibers.

Wear-resistant reed for a high-speed loom

A temperature compensation type infrared sensor includes a substrate having a central pit and functioning as a heat sink with an insulation film formed on the top face of the substrate and defining a diaphragm located above the pit, a plurality of thermocouples disposed on the insulation film and connected in series with each of said thermocouples having a hot junction on said diaphragm and a cold junction on the heat sink, and a thermopile element including a black body on the central portion of the diaphragm in the insulation film for absorbing infrared rays with the thermopile element being placed on a thermistor chip for compensating temperature.

Temperature compensation type infrared sensor

A solid state complementary electrochromic display device in which a first electrochromic material layer which permits an oxidation-reduction reaction and is colored in a reduction state, an ion permeable insulating layer, a second electrochromic material layer which permits an oxidation-reduction reaction and is colored in an oxidation state are prepared between two electrodes and the first electrochromic material layer and the second electrochromic material layer are colored or bleached simultaneously. The ion permeable insulating layer comprises a halogenide. As a result, high coloration concentration can be obtained at a low potential.

Solid state complementary electrochromic display devices

A solid state complementary electrochromic display device in which electrochromic display elements comprising a first electrochromic material layer of a reduction coloration type consisting essentially of tungsten trioxide, a second electrochromic material layer of an oxidation coloration type consisting essentially of iridium oxide or rhodium oxide, and an ion permeable insulating layer disposed between both layers are formed on one surface and on the opposite surface of a transparent substrate.

All solid state complementary electrochromic display devices

Growing community of inventors

Sayama, Japan

Takanori Nanya