Abstract: A microscope objective lens system which comprises a first lens component of a positive lens, a second lens component of a positive meniscus lens having its convex surface faced to the object side, a third lens component of a negative lens, a fourth lens component of a positive meniscus lens having its concave surface faced to the object side, and fifth lens component of a double-convex lens, in which image plane through the objective lens system can coincide with a reverse-traced image plane through an eyepiece lens system and which enables observation with a flat image plane through the eyepiece lens system.

Abstract: An image processing system converts gradation data of an image signal from a television camera into a digital code and transfers it to a computer. In the image processing system suitable means slice a portion which contains data of the image signal at a given level, means quantize a signal waveform obtained by the slice means, means count how many numbers of pulses obtained by the quantizing means at a given portion of one horizontal scan during each horizontal scan, and means for transfer counted values of the counting means to the computer at every completion of one horizontal scan.

Abstract: An electrographic process which makes use of a photosensitive screen is disclosed. The photosensitive screen is composed of an electrically conductive support, a photoconductive member coated on the electrically conductive support and a dot-, line- or mesh-shaped insulating member coated on the surface of the photoconductive member with an interface formed between the photoconductive member and the insulating member. An electric charge is trapped on the interface and an electrostatic latent image corresponding to a manuscript image is produced on the insulating member only, thereby obtaining an electrographic image having excellent resolving power.

Abstract: A writing pen for heat developing photoconductive material including a pen having a nib formed of material of high thermal conductivity and pervious to light, for contacting photosensitive heat developing material. The pen has a light source for illuminating the photosensitive material through the pen nib contacting the material, and a heater embedded in the nib for heating the nib portion in contact with photosensitive material. The pen nib may include a light-pervious rotatable ball tip seated in a light-pervious ball receptacle.

Abstract: In an electrophotographic apparatus including a photosensitive screen drum there is produced a rotation signal each time the screen drum rotates one revolution beginning with a second revolution and the drum is stopped by an n.sup.th rotation signal, so that the drum is rotated through (n+l) revolutions when n copies are formed from the same document. During the first revolution of the screen drum, an electrostatic charge latent image is formed on the drum and during the successive n revolutions the latent image is repeatedly transferred to form n copies. A resetting operation of a copy number setting dial is initiated from the second revolution by the first rotation signal.

Abstract: A code detection circuit for removing an influence due to an error code transmitted in a band compression facsimile, etc. The circuit comprises an input register for temporarily memorizing input data, an output register coupled to the output of the input register, a comparison circuit coupled to the input and output of the input register and comparing the input data of the input register with the output thereof, and a reader for reading the output of the input register in the output register by means of the output of the comparison circuit when the input data becomes coincident with the output of the input register.

Abstract: An improved electrographic apparatus employing a photosensitive drum of a foil-shaped photosensitive body wound around a disc shaped frame. The drum is inserted into and removed from the electrographic apparatus body and there are first and a second bar-shaped members secured to opposed peripheral edges of the foil-shaped photosensitive drum and engaged with said disc-shaped frames, respectively. Current supply rings are concentrically arranged on and secured to the outer surface of one of the disc-shaped frames, the foil-shaped photosensitive body is provided with an electrically conductive substrate connected through a first of the bar-shaped members and a tension spring and one of the current supply rings to a bias voltage source. The electrically conductive layer of the foil-shaped photoconductive body is connected through a lead wire, an electrically conductive member embedded in the disc and the other current supply ring to the bias voltage source.

Abstract: A device for controlling a reverse time of a manuscript carriage, etc. for electrographic apparatuses is disclosed. The device comprises means for disengaging a forward movement electromagnetic clutch from a manuscript carriage or optical system driving mechanism and, after a lapse of time from the moment of disengaging the forward movement clutch from the manuscript carriage or optical system driving mechanism, for driving a backward movement clutch. The device is capable of effectively prevent the backward movement clutch and a carriage supporting plate, etc. from being subjected to heavy load and of effecting a reciprocal movement of the manuscript carriage or optical system in a smooth manner.

Abstract: A screen means free from ghost image comprising a screen and Fresnel lens arranged so that its Fresnel surface faces the screen. The Fresnel lens is arranged that optically inactive surfaces of its Fresnel surface become approximately parallel with the advancing direction of projected rays entered through and refracted by the back surface of the Fresnel lens.

Abstract: A shift lens system having a correcting means for correcting aggravation of aberrations to be caused when the lens system is shifted in parallel with the image surface. The correcting means is arranged to decenter at least one lens component in the lens system when the lens system is shifted and to thereby obtain a favorable image.

Abstract: A speaker supporting device used for radios or cassette tape recorders includes a cylindrical or annular elastic body for supporting a speaker on its inner peripheral surface, one open end of the elastic body is tightly secured to a baffle plate and other open end of the elastic body is tightly secured to the chassis of a casing.

Abstract: An electrographic apparatus comprising a photosensitive screen composed of an insulating layer, two electrically conductive layers coated on opposite sides of the insulating layer and a photosensitive layer coated on one of said electrically conductive layers, and a bias electric source connected between the two electrically conductive layers and producing, on a dielectric coated record sheet, an electrostatic latent image corresponding to an image to be reproduced is disclosed. The apparatus comprises means for adjusting a bias voltage supplied from the bias electric source and applied between the two electrically conductive layers.

Abstract: A shutter opening and closing mechanism for an electrographic apparatus comprising a dark box for surrounding a photosensitive screen and provided with an opening through which light flux reflected from a manuscript image is projected onto the photosensitive screen. The opening is closed by a shutter operatively interlocked with a reciprocating exposing and scanning mechanism and becomes open only when a first electrostatic latent image corresponding to the manuscript image is to be produced on the photosensitive screen.

Abstract: A tubular medical instrument has at least one cuff assembly including two cuffs disposed on the circumference of a flexible sheath, spaced at prescribed intervals and made expansible only in a radial direction of the flexible sheath and a deformable propellant cuff having a doubled-back section, disposed also on the circumference of the sheath between the two cuffs. When air is introduced into, or drawn from, the three cuffs selectively, the flexible sheath automatically advances step by step in the human body cavity.

Abstract: A device for controlling rotations of a photosensitive drum for electrographic apparatus. The device comprises a start button, a dial for setting number of copies to be reproduced, and means for rotating a photosensitive drum for turns corresponding to number of copies set beforehand plus 1 irrespective of setting said dial to positions corresponding to reproducing 1 copy and a plurality of copies.

Abstract: An electrographic apparatus which makes use of a screen drum composed of a mesh-shaped photosensitive screen. The apparatus comprises one corona discharge device, a corona voltage source circuit including a corona voltage source switch connected to an input side of said corona voltage source circuit and a polarity change-over switch connected between said corona voltage source circuit and said corona discharge device. A first step of uniformly charging said photosensitive screen and a second step of charging a dielectric coated record sheet with an electrostatic charge image corresponding to an image to be recorded are effected by one corona discharge device only.

Abstract: An apparatus for controlling a facsimile transmitter and receiver in which operations at a receiving end are automatically effected in succession by a control signal delivered from a sending end. The transmitter functions to deliver a continuous "1" signal. The receiver functions to automatically start its operation when the continuous "1" signal continues for a time longer than a predetermined time. The transmitter comprises a manuscript detector. When the front end of a manuscript to be transmitted is detected a phase signal is delivered. The receiver comprises a detector and a discrimination circuit. When the phase signal is detected, a record sheet is delivered and recorded and when depletion of the phase signal is detected, a cutter is operated to cut the record sheet. The distance between the front end of the manuscript and a reading head is made equal to the distance between the front end of the record sheet and a recording head.

Abstract: An electrographic apparatus for producing, on a dielectric record sheet, an electrostatic charge image corresponding to a manuscript image to be recorded is disclosed. The apparatus comprises a shutter arranged in a light path for projecting the manuscript image onto a photosensitive screen and adapted to be opened only when an electrostatic latent image corresponding to the manuscript image is produced on the photosensitive screen.

Abstract: A plurality of foot-operated controllers are separately provided for controlling various operations such as the vertical movement of the body of a surgical microscope, the focussing of an objective or the like. Depending on the intended use, selected controllers are connected together by releasable spacers to provide a foot-operated controller assembly.

Abstract: An assembly comprises a disc having an annular array of a number of reaction tubes formed adjacent to the periphery thereof. Each reaction tube is U-shaped and has its one end formed as an open-ended reaction chamber and its other end functioning as an air supply port. The link portion between the reaction chamber and the port is made transparent, forming a flow cell which permits the transmission of light which is used for the purpose of analytical determination. The assembly permits treatment with a reagent of a sample for reaction as well as a photometry for colorimetric analysis of the sample solution obtained by the reaction treatment of the sample.