摘要:
An optical amplifying repeater is provided which enables even after the main input optical signal is disconnected, the continued returning of a response signal in response to a command signal from an end station. This optical amplifying repeater comprises an optical amplifier, an automatic level control loop including therein a drive control unit, a supervisory unit which returns a response signal RS responding to a command signal CM from an end office, and a detection/control unit which controls the drive control unit so as to increase the amplitude of the response signal RS when a loss of the main optical signal S from an optical transmission line is detected.
摘要:
A multi-media communication terminal device includes a first information communication device for communicating the first information at a plurality of communication rates, a second information communication device for communicating the second information different from the first information at a plurality of communication rates a selection device for selecting the information concerning the communication rate to specify the communication rate of the first information, and a control device for selecting the communication rate of the second information based on the communication rate of the first information specified.
摘要:
An apparatus for manufacturing electrical interconnection assembly in which a wire is laid on wire laying pins on a pin board or an insulating support body at high velocity and with high density. The electrical interconnection assembly manufacturing apparatus according to the present invention comprises: a pinboard; a plurality of wire laying pins standing on the pinboard; a slide plate opposing tips of the wire laying pins; and a nozzle attached to the slide plate, wherein the pinboard and the slide plate relatively move under the condition that the pinboard opposes the slide plate while a wire fed from the nozzle is laid on the plurality of wire laying pins.
摘要:
A semiconductor rectifier having a high breakdown voltage and a high speed operation is provided, which comprises a semiconductor substrate including a first semiconductor layer of one conductivity type and a second semiconductor layer of one conductivity type provided on the first semiconductor layer, a third semiconductor layer of an opposite conductivity type having a depth D and formed in the second semiconductor layer to provide a pn junction therebetween, the third semiconductor layer defining a plurality of exposed regions of the second semiconductor layer, each of the plurality of exposed regions of the second semiconductor layer having a width W, a relation between the depth D and the width W being given by D.gtoreq.0.5W, and a metal electrode provided on the substrate surface.
摘要:
In a combination desk and wall telephone set, a base member having a telephone back surface and an optional board therewithin is joined with a main body having a front surface on which an operation panel is arranged and a telephone circuit board therewithin. The back surface of the base member is formed tilted with respect to a front surface of the main body, and further, the joining direction of the base member to the main body is reversible. By reversing the joining direction, an appropriate inclination angle of the operation panel can be selectively obtained so as to be suitable for desk use or wall use. A recessed cord housing portion is formed at part of the back surface of the base member so that the surplus telephone cord is not seen from outside. This cord housing portion is formed at the bottom wall thereof with a plurality of connector housing portions having connection openings for respectively housing plural connectors mounted on the telephone circuit board and the optional board. Further, the base member is formed integral with a removable handset hanger for prevention of a handset from being dropped in use as a wall telephone set. The removed handset hanger can be housed within a hanger housing portion for prevention of its loss when not in use.
摘要:
A method for treating edema or hypertension which comprises administering an effective amount of a quinazoline derivative of the general formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each is a hydrogen atom or a halogen atom or a pharmaceutically acceptable salt thereof to a human being in need of said treatment.
摘要:
Scanning angle control for a linear array of spaced transducers in a pulse echo receiver is implemented by mixing the respective transducer outputs with progressively shifted output signals from a multi-stage, variable phase shifter fed by a local oscillator. The additively combined mixer outputs thus contain frequency sum and difference components, which are extracted by low or high pass filters to implement scanning control on either side of a perpendicular to the array. When a two dimensional array of transducers arranged in a row and column coordinate grid is employed, scanning in both azimuth and elevation may be implemented by coupling each column of transducer mixers to the respective phase shifter stages through digital delay circuits arranged in rows and fed by a variable frequency clock pulse generator, whereby progressive delays are provided in the columnar direction.
摘要:
This invention relates to a contour tracing sewing machine for forming a line of seam on a workpiece in conformity with a contour of a stitching templet of a desired shape.The tracing device used in the contour tracing sewing machine comprises a light source for emitting light towards the stitching templet, and a light sensing head consisting of a plurality of optical fibers arranged in an annular form for transmitting the light radiated on the stitching templet to a plurality of photoelectric cells. The tracing device further comprises a device for selecting a predetermined tracing direction according to electric signals produced from the plurality of photoelectric cells, so that the stitching templet and the workpiece may be shifted relatively to the light source and the sensing head by a drive device of an open-loop type in the tracing direction thus selected.
摘要:
A novel process for depositing and diffusing an impurity on and into the surface of a number of semiconductor wafers placed in parallel on a quartz boat. The impurity source is formed as a plurality of long and slender bars or a unitary tunnel-shaped element or a plurality of tunnel segments obtained by cutting the element apart. The impurity source as described above is mounted about the periphery of the semiconductor wafers arranged in a row on a quartz boat for reducing the consumption of the impurity source.
摘要:
Disclosed herein is a sheet-binding apparatus. The apparatus has two sheet binding units, each configured to bind the sheets manually inserted from outside. The sheet binding units operate independently, each at the timing appropriate for a specific need.