Abstract: A device for locking the lid of a cassette tape receiving compartment of a cassette tape recorder including a lock member projecting from a portion of the lid and a generally U-shaped lock spring provided at one end of one leg thereof with a first projection engaging the lock member of the lid during opening and closing thereof. A second projection on the one leg of the lock spring engages against a ledge formed in the recorder casing in order to modify the spring force applied by the lock spring against the lid.

Abstract: An electrophotographic apparatus comprises a photosensitive screen drum of a radius r.sub.1 having a number of apertures formed therein and rotating through a printing or charging area having a width W at a constant peripheral velocity v.sub.1, a record medium such as a charge transferring drum of a radius r.sub.d (r.sub.2 = r.sub.1) arranged opposite to the screen drum with a distance d at the printing area and rotating through the printing area at a constant peripheral velocity v.sub.2, means for forming on the screen drum an electrostatic latent image of a document to be copied, and means for generating a corona ion stream passing in the printing area through the apertures of the screen drum, whereby the corona ion stream is modulated with an electric field formed in or near the apertures of the screen drum so as to form on the transferring drum a charge image corresponding to the latent image on the screen drum. The screen drum and transferring drum are rotated at a velocity ratio k = v.sub.2 /v.sub.

Abstract: A light source system for use in a lighting device of a microscope comprises an elliptical cylindrical concave reflecting mirror, a linear light emitter arranged at one focus position of the mirror, a cylindrical condenser lens arranged at the opening position of the mirror and a bundle of optical fibers. A part of the end surfaces of the fiber bundle is arranged at the condensing position of the portion of the light from the emitter reflected by the mirror and refracted by the condenser lens. The other part of end surfaces of the fiber bundle is arranged at the condensing position of the portion of the light from the emitter directly refracted by the condenser lens.

Abstract: An electrographic apparatus comprising a drum type screen photosensitive body and for producing, on a record sheet having a dielectric material layer, an electrostatic charge image corresponding to an image to be recorded in response to an electrostatic latent image formed on the screen photosensitive body by controlling a flow of ions directed from a corona discharge device through the screen photosensitive body toward the record sheet is disclosed. The apparatus comprises a casing for substantially hermetically surrounding said drum type screen photosensitive body and an air circulating device for circulating a flow of air through said casing.

Abstract: Disclosed is a coreless motor comprising a rotor having a plurality of flat-type loop coils arranged on a rotor substrate, a motor housing having a journal bearing for rotatably supporting said rotor, and a stator which includes a pair of permanent magnets disposed facing said rotor in said motor housing, characterized in that the angle .theta. of said flat-type loop coil flared toward itself from the rotor axis is so set as to satisfy the inequality: ##EQU1## WHERE N IS THE NUMBER OF POLE MEMBERS OF A COMMUTATOR AND 2P IS THE NUMBER OF MAGNETIC POLE MEMBERS OF A STATOR.

Abstract: A copying machine for preparing copies of a manuscript to be reproduced disposed on a carriage movably mounted on a casing is disclosed. The machine comprises at least one manuscript holding member resiliently connected to a lid covering the manuscript and projecting above the manuscript. The manuscript holding member is urged against the manuscript until the lid reaches to its given open position and separated from the manuscript when the lid is further opened beyond the above mentioned given open position of the lid.

Abstract: A detecting head for use in an apparatus for reading optically information recorded on a record carrier as a track or tracks comprising an optical system including a projection lens for projecting a light spot onto the track to be read and a device for detecting a relative position between the light spot and the track. The optical system further comprises a device for supporting the projection lens movably in a direction perpendicular to a track direction and a device for driving the projection lens in this direction. The projection lens is further moved in a direction parallel to the track or in a direction parallel to the optical axis of the projection lens.

Abstract: An improved screen drum type electrographic apparatus which can obtain a picture image having a correct aspect ratio is disclosed. The apparatus comprises a cylindrical lens arranged in an optical passage including an optical system for scanning a manuscript such as printed matter disposed on a table. The cylindrical lens has such a radius of curvature that an image magnification in the scanning direction only is defined by 1/K (K>1) and a length which is sufficient to optically cover the scanning width of a screen drum or the manuscript. The apparatus is so constructed that the ratio of the peripheral speed of the screen drum to the moving speed of the manuscript table or the optical system for scanning manuscript is defined by 1/K.

Abstract: A method of stabilizing output light of a current modulation laser device whose output light is changed by changing an anode current is disclosed. The method comprises detecting a part of a laser output light and converting that part of the laser output light which is detected into an electric signal, comparing said electric signal with a modulating input signal to obtain an analog signal corresponding to a difference between said two signals, controlling a gain of said modulating input signal by means of said analog signal, and feeding back said gain controlled modulating input signal to an input terminal of a laser device.

Abstract: A picture image information band compression and transmission process includes the steps of providing one set of three scanning lines making information of the first scanning line of each one set as an estimation scanning line, estimating a picture element to be estimated by four consecutive picture elements, preparing estimated picture image informations, and translating the estimation reference scanning line and two estimated picture image information into run length codes and into mode codes, respectively, and compressing and transmitting the run length codes.

Abstract: A facsimile scanning conversion system which can convert a facsimile scanning at a transmitter side or a receiver side such that a picture surface received at the receiver is correctly similar to that to be transmitted from the transmitter when either one or both an index of cooperation and a scanning speed of a facsimile transmitter is or are different from that or those of a facsimile receiver is disclosed. The facsimile scanning conversion system makes use of a facsimile scanner, a buffer memory, an electrical transmission control device, an addition register and a scanning control device.

Abstract: A corona charge device which can charge a medium being charged such as a photoconductive body or a record sheet provided for a conventional electrographic apparatus. The device comprises a corona discharge wire connected to a high voltage source and a grounded shield electrode surrounding the corona discharge wire and composed of an elongate rectangular closed vessel which is open at its bottom wall to define an opening. The transverse width of the opening is reduced by two opposed elongate insulating plates secured to the side walls of the vessel.