Seiko Instruments & Electronics Ltd.

Kabushiki Kaisha Daini Seikosha

Masao Miyamoto

Shojiro Komaki

Fumio Watanabe

Yoshiaki Hara

Takao Ito

Yasuo Kusumoto

Hajime Ishimaru

Syojiro Komaki

A coolant preservation container having vacuum space in a peripheral portion of the interior thereof for making a container member adiabatic and a partition for dividing the container member into a plurality of chamber. Each chamber has ports from and via which a coolant is taken out from and returned to the chamber. These ports are suited to circulate a coolant contained in the chamber on external cooling trap.

Coolant preservation container

A quadrupole mass spectrometer generates a stream of ionized particles which are modulated by an AC voltage and transmitted through a quadrupole analyzer to a detection unit. The detection unit detects at a collector electrode thereof a modulated ion current which is fed to a phase detector. The phase detector synchronizes the modulated ion current with a signal of known frequency to produce a DC voltage representative of the level of the modulated ion current. By modulating the ionized particles with the AC voltage, the S/N ratio is improved and adverse effects of external noise are diminished.

AC-modulation quadrupole mass spectrometer

A double grid anode is characterized in that said anode is comprised of a first cage-like anode made of a metal grid or wire gauze that permits that passage of electrons and that has an open end, a second anode which also consists of a metal grid or wire gauze located at the open end side of said first anode, a hot-cathode filament arranged around the outer periphery of said first anode, and an ion-extraction electrode which faces said anode.

Electron-impact type of ion source with double grid anode

An electro-optical display device comprises electro-optical material sandwiched between a pair of substrates each having formed thereon electrodes. The electrodes on one substrate comprise a segment display electrode part comprised of a plurality of seven-segment electrodes, and a dot matrix display electrode part comprised of a plurality of parallel linear electrodes. The electrodes on the other substrate comprise a complementary counter electrode part corresponding to the segment display electrode part, and a complementary counter electrode part comprised of a plurality of parallel linear electrodes perpendicularly intersecting the linear electrodes formed on the other substrate. The electrode leads which are connected to some of the seven-segment electrodes also comprise some of the linear electrodes of the dot matrix display thereby reducing the overall number of separate electrodes and enabling construction of a more simple display device.

Electro-optical display device

Time correcting means for a digital electronic watch enables time correction to be carried out by manually applying pressure to a pressure sensitive diode. By changing the magnitude of the applied pressure, the time correcting speed can accordingly be changed in two or three steps.

Growing community of inventors

Tokyo, Japan

Masao Miyamoto