Abstract: A superminiature microphone device includes a hollow body in the form of a decorative clothing accessory, a microphone unit including lead wires within the body, and a plug connected by the lead wires to the microphone unit wherein the plug has at least one pin-shaped terminal. A cord connector including a conical collet chuck is arranged to receive the pin-shaped terminal of the microphone unit plug from behind an article of clothing such as a necktie. A clamp member is arranged around the tip portion of the chuck for clamping the chuck about the plug terminal in response to a spring force. Accordingly, an electric cord can be routed from the connector behind the article of clothing so as to connect the microphone unit with an outside device so that the wearer's appearance is not affected by the presence of the connection cord.

Abstract: A tape recorder capable of detecting and discriminating the position of an operating button by the touch of a finger tip comprises a projected wall having a predetermined configuration positioned along each of the operating buttons provided in the tape recorder casing.

Abstract: A duplicating system comprises an electrophotographic copying apparatus which includes a first optical scanning system for making a slit exposure, a first document feeder for feeding a first document to be copied at a first speed with respect to the first optical scanning system, a rotating photosensitive drum for forming an electrostatic latent image corresponding to the image of document, and means for forming a duplicated copy with the aid of the latent image; and an option device detachably mounted onto the copying apparatus and comprising a second optical scanning system for making a slit exposure, a second document feeder for feeding a second document to be copied at a second speed with respect to the second optical scanning system and an optional optical system for projecting the image of second document onto the photosensitive drum.

Abstract: A collator includes a series of twenty bins arranged in parallel with each other, a copy feeding member for feeding copies supplied from a copying machine along inlets of the successive bins, first and second deflecting devices arranged at the uppermost two bins for delivering the copies into the uppermost two bins and a distributor movable between the third bin and the twentieth bin for delivering the copies into the bins. The collator can treat the copies in a job separation mode in which all copies of each documents are delivered into respective bins in succession, while the distributor is advanced bin by bin in response to a distributor advance signal produced by a variable timer which is actuated upon detection of the rear edge of the last copy of an Nth original by an entrance switch to set a time period represented by b+(N-1).times.a/V.sub.1, wherein a is a pitch between successive bins, b is a distance from the entrance switch to the first bin and V.sub.1 is a copy feed speed in the collator.

Abstract: A photosensitive member is formed by applying on an electrically conductive substrate, a first photoconductive layer sensitive to a visible light, an insulating charge retentive layer, and a second photoconductive layer sensitive to ultraviolet light, successively in this order. At first the photosensitive member is uniformly charged to a negative polarity, while the photosensitive member is uniformly exposed to the visible light. Then an image of a document to be copied is projected while the photosensitive member is charged to a positive polarity. After that the photosensitive layer is uniformly exposed to the visible light and finally the photosensitive member is uniformly exposed to the ultraviolet light. In this manner, an electrostatic charge image having high contrast and resolution is formed in the photosensitive member by means of charges which are stably trapped across the charge retentive layer.

Abstract: An objective lens driving device useable in an information reading-out apparatus for projecting a light spot onto a record medium which has been spirally or concentrically recorded with one or more information tracks and for reading-out the information, which drives the objective lens in a direction perpendicular to its optical axis and the information track, thereby correcting relative positional error, i.e. tracking error, between the information track and the light spot.

Abstract: A peripheral, radial surface extends outwardly and upwardly from the bottom surface of a circular tub which supports a walking dragline excavator or like machinery. The extension surface reduces bearing pressure on the tub in both stationary and walking positions, and facilitates sliding of the tub relative to underlying terrain as the equipment is moved. The extension surface is angularly disposed relative to the bottom tub surface so as to be substantially parallel to the terrain during walking movement of the dragline. Thus, the dragline load is distributed over a relatively large area, and the bulldozing effect of the tub's trailing edge is minimized.

Abstract: An automatic chemical analyzer comprising a turntable is disclosed which holds a number of cuvettes containing test liquids to be analyzed and is rotated about a center axis step by step at a given repetition rate, a panchromatic light source is arranged to project radially a measuring light beam from the center axis to the cuvettes, and a light detector is arranged in the center axis to receive the measuring light beam transmitted through the test liquid via prisms. A rotating filter holder is arranged in front of the light detector to insert given filter elements into the measuring light beam path so as to effect colorimetric measurement with desired wavelengths.

Abstract: An electrophotographic apparatus for producing one or more copied images of an original by forming an electrostatic latent image of the original on a photosensitive member whose width is narrower than that of a recording paper, developing the latent image, and transferring the developed image onto the recording paper, the apparatus including a device for removing electric charge from edge portions of the photosensitive member after said transferring but before next succeeding development of said latent image in the course of repeating developments and transferrings of one electrostatic latent image formed on said photosensitive member.

Abstract: A cassette holder used for electronic equipments, such as for example a tape recorder, comprises a body of the cassette holder of the slot-in type, a resilient member disposed in the vicinity of the body and having such a toggle action that the resilient member is biased in a large degree toward the cassette insertion when the cassette is loaded, but in a small degree toward the cassette ejection when the cassette is unloaded, and an engaging pin provided to the resilient member and arranged to be engaged with the cassette to be loaded so as to transmit the bias force of the resilient member through the engaging pin to the cassette.

Abstract: In a transfer roller for use in a retention type copying machine, a semiconductive transfer roller is connected through a current limiting resistor having a high resistance value of 100 M.OMEGA. to 1000 M.OMEGA. to a transferring bias voltage source. A pair of auxiliary transfer rollers made of conductive material are arranged on respective sides of the transfer roller. The auxiliary transfer rollers are connected to the transferring bias voltage source through a potentiometer. To the transfer roller is applied a first transferring bias voltage of 600 to 900 volts and to the auxiliary transfer rollers is applied a second transferring bias voltage of 400 to 650 volts. When a resistance of a record paper is decreased due to high humidity, the first transferring bias voltage is automatically decreased and the second transferring bias voltage becomes predominant.

Abstract: An electrophotographic sensitizing screen having a great number of apertures, wherein at least an insulating layer and a conductive layer are successively formed on a conductive mesh, is disclosed. These apertures are regularly arranged at such an angle as not to produce moire fringes with respect to a light image projected on the screen.

Abstract: In a method for printing in an electrophotographic manner a number of duplicated copies by repeatedly effecting developing and transferring steps for the same and single electrostatic charge latent image once formed on a charge retentive member such as a photoconductive drum, in order to compensate a variation in print density of a number of copies an amount of toner particles to be supplied to the latent image during the developing step is adjusted in such a manner that the copies have substantially the same print density. The adjustment of an amount of toner particles can be effected by changing a supply speed of the toner particles, a thickness of a magnetic brush, a distance from the magnetic brush to the latent image, etc.

Abstract: A motor speed control device comprises means for generating pulse output corresponding to the revolution speed of the motor, means for generating saw-tooth wave output in synchronization with the pulse output, means for generating reference voltage, a current mirror load differential amplifier including a first amplifier element having a first current mirror circuit connected as load and supplied with the saw-tooth wave output and a second amplifier element having a second current mirror circuit connected as load and supplied with the reference voltage and for supplying current to the first or second current mirror circuit corresponding to the result of comparing the reference voltage with the saw-tooth wave output, an integrating circuit to be charged or discharged by the charging current flowing through one of the first and second current mirror circuits and the discharging current flowing through the other of both circuits, and means for driving the motor by output of the integrating circuit.

Abstract: A system for recording and reproducing a video signal, includes a converter for converting an incoming video signal into a number of signal channels, and a corresponding number of magnetic heads for recording and reproducing the signal channels in association with a magnetic tape. A circuit superimposes a pulse signal in the vicinity of the back porch of the incoming video signal prior to its conversion, and reconverting circuitry operates to reconvert the signal channels and combine them to provide a reproduced video signal. The superimposed pulse is separated from the reproduced video signal by appropriate circuitry, and the relative phase fluctuation between the separated pulse and a horizontal synchronizing signal to be added to the reproduced video signal is detected.

Abstract: An electrophotographic process for forming or printing one or more duplicated copies of an original document comprisesa step for subjecting a uniformly charged photosensitive member such as a photoconductive drum and a photoconductive screen drum to an imagewise exposure corresponding to an image of the document to be duplicated to form an electrostatic charge latent image corresponding to the image of the document;a step for developing the electrostatic charge latent image with a toner developer such as a magnetic brush by bringing it into contact with the latent image while applying a development bias voltage between the photosensitive member an a development electrode arranged at or near development means; anda step for transferring the developed toner image onto a record medium to form the duplicated image thereon, wherein the development bias voltage is manually changed to adjust a quality of the toner image such as density, contrast and half tone properties.

Abstract: A coeliac cavity ultrasonic diagnosis apparatus which includes an ultrasonic transducer or scanner portion adapted to be inserted into a coeliac cavity to effect a sector scan of an ultrasonic beam to produce an ultrasonic image of internal tissues and in which the ultrasonic oscillator on the one hand and an ultrasonic reflecting mirror and rotary disc on the other hand are relatively rotated so as to effect the sector scan of the ultrasonic beam and the rotary angle of the rotary disc is detected so as to obtain a deflecting angle of the ultrasonic beam and a display on a cathode ray tube of a precise ultrasonic picture image.

Abstract: An ion selective electrode having a silicon wafer substrate secured to one end of a tube made of insulating material by an adhesive agent and an ion sensitive film applied on the outer surface of silicon wafer substrate is disclosed. In order to prevent a portion of a side edge of silicon wafer substrate from being exposed to a sample liquid to be measured, the side edge of silicon wafer substrate is tapered and the ion sensitive film is applied on the tapered side edge as well as on the outer surface of silicon wafer substrate. The tapered side edge may be simply formed by effecting an anisotropic etching for a silicon wafer.

Abstract: A miniature stereo device which provides a satisfactory stereo effect includes a main body having an audio device which generates a stereo output, and a pair of speakers positioned at both sides of the main body for reproducing the stereo output. One of the speakers is arranged to be extended to a position at which it is separated and fixed relative to the other speaker at a desired distance, in order to obtain an optimum stereo effect.

Abstract: An electrophotographic apparatus for printing or forming at least one copy of a manuscript comprising a manuscript feed mechanism including upper and lower side feed mechanisms arranged above and below a rectilinear manuscript feed path including a slit light exposure portion at which a manuscript image is projected onto a photosensitive drum, said upper side feed mechanism being movable with respect to said slit light exposure portion to define thin and thick manuscript feed paths, respectively. A thick manuscript feed mechanism is provided in the lower side feed mechanism for feeding a thick manuscript carriage made of transparent plate. The apparatus further comprises a first movable edge guide for positioning an edge of a sheet manuscript and a second fixedly arranged guide for positioning the edge of the thick manuscript carriage. The first guide is preferably positioned inwardly with respect to the second guide viewed in a widthwise direction of the manuscript.