Mitsubishi Denki Kabushiki Kaisha

Yushiro Chemical Industry Co., Ltd.

Masahiro Noda

Masaharu Fuchigami

Eiki Watanabe

Hiroshi Ando

Takeshi Yatomi

Takeshi Iwasaki

Tsuyoshi Ikeda

Ryoji Takahashi

Kenzo Yokoyama

Kazuo Tokui

Tatsuo Misu

Akira Akagawa

This invention relates to a water-soluble lubricant composition for a sleeve surface lubricating oil, an operating fluid, a cutting oil, a rolling oil, a drawing oil, a press oil or the like, which does not pollute the environment and has superior lubricity, metal corrosion preventing property, antifoaming property and antiseptic property. The water-soluble lubricant composition of this invention containing surfactants (a) and one or two salts (b) selected from among carboxylates and sulfonates is characterized in that the above one or two salts (b) selected from among carboxylates and sulfonates are alkaline earth metal salts or zinc salts and that substantially no nitrogen ingredients are contained and the amount of nitrogen contained represents its amount in impurities, or 0.5 wt % or below of nitrogen.

Water-soluble lubricant composition

Rust inhibitors for electrical discharge machining solutions. Each preventive is composed of a fatty acid amide which has been obtained by dehydrating and condensing at least one fatty acid and at least one alkanolamine.

Electric discharge machining fluid with a fatty acid amide additive for

A bactericide is added to conventional water-soluble cutting fluids to suppress deterioration by microorganisms. Such fluids are however accompanied by the drawbacks that the bactericide has a narrow antibacterial spectrum and moreover its effects last a short time. It is the object of the present invention to offers water-soluble cutting fluids which remain resistant to a wide variety of microorganisms for a long time. The present invention therefore offers water-soluble cutting fluids to which has been added a specific amine selected from amines known to date.

Antibacterial water-soluble cutting fluid resistant to yeast-like fungi

In an elevator system comprising a machine room and an elevator car, as the elevator car moves along a hoistway between a plurality of floors, a radio system permits wireless communication between the machine room and the elevator car. As the elevator car moves along the hoistway, the distance between the elevator car and the machine room varies. To effect stable signal transmission and avoid receiver saturation when the elevator car is in close proximity to the machine room, the output of the transmitter or the sensitivity of the receiver is varied in accordance with the distance between the elevator car and the machine room.

Elevator controller

The present invention relates to an apparatus for detecting any abnormality in a cage of an elevator, characterized by comprising a transmitter which continuously transmits an ultrasonic wave inwardly of the cage of the elevator, a receiver which receives an ultrasonic wave retrogressing in such a manner that the ultrasonic wave transmitted from said transmitter is reflected by an object within the cage, and a processing circuit which detects the rate of movement of the object within the cage on the basis of a magnitude difference between frequencies of the ultrasonic waves of said transmitter and said receiver and which decides that an abnormality has occurred in the cage when the difference frequency has become at least a preset value.

Apparatus for detecting abnormality in the cage of an elevator

When a start failure detecting circuit detects a start failure of an elevator cage, a signal transmitting and receiving device automatically dials a telephone number of a maintenance and service company to connect a telephone line thereto and at the same time transmits a recorded signal from a signal recording device to the maintenance and service company over the telephone line. The maintenance and service company decides how serious the start failure is on the basis of the transmitted recorded signal. When the start failure is determined as being less serious, the maintenance and service company transmits a restoration signal to the signal transmitting and receiving device. In response to the restoration signal, a reset circuit generates a reset signal to bring the control board back to the same condition as when the power supply is initially switched on, to thereby restore the disabled elevator.

Apparatus for signaling elevator malfunctions

A proximity detector comprises a pair of antennae being disposed along the front edge of a door and at a space therebetween, a pair of coils constituting series resonance circuits, together with each electrostatic capacities of the antennae which are connected in series with the coils, an AC power source for supplying voltages to the series resonance circuits; rectifying circuits for rectifying the voltages produced on the antennae by the AC power source, and a differential amplifier circuit for amplifying difference between the outputs of the rectifying circuits, the output of the differential amplifier controlling the movement of the door.

Proximity detector

A proximity detector including a pair of antennae disposed at the front edge of a door with a space; and voltage converters for converting earth electrostatic capacities of the antennae to the corresponding voltages. The proximity detector further includes a first detecting circuit for detecting a differential signal of the outputs of the voltage converters; and a second detecting circuit for detecting a summing signal of the outputs of the voltage converters. The movement of the door is controlled by the output of the first detecting circuit and/or the output of the second detecting circuit.

Growing community of inventors

Kanagawa, Japan

Masahiro Noda