Abstract: A photo-mask comprises a light-permeable substrate, a plurality of light-shielding films that are disposed on the substrate, the light-shielding films forming a mask pattern, and a light-permeable protective film that is disposed over the surface of the substrate including the light-shielding films so as to protect the light-shielding films.

Abstract: A method and apparatus for additionally photographing information for retrieval during the photographing of an original image on a microfilm is disclosed. A slit light from a light source is projected on the microfilm while the microfilm is being transported. The length of the information for retrieval to be additionally photographed on the microfilm can be freely set by controlling the period of the projection of the light on the microfilm. One displaying device is adapted to project light in the pattern of one numeral on the microfilm while the microfilm is at rest.

Abstract: A method of and a photomask for manufacturing an optical memory element. The manufacturing method includes the steps of: subjecting a positive type photoresist coated on a glass substrate to exposure, by using the photomask capable of irradiating light onto a portion of the photoresist other than the remaining portion, for forming pits on the glass substrate such that the portion of the photoresist is solubilized against developing solution; developing the photoresist by using the developing solution so as to remove the portion of the photoresist; and etching the glass substrate so as to directly form, as convex portions, the pits on a surface of the glass substrate.

Abstract: A roll film camera is disclosed which comprises a supply reel for winding the part of a roll of recording medium yet to be used and a takeup reel for winding the part of the recording medium already used for photographing original images. This camera is constructed so as to be loaded with a plurality of types of recording medium which differs in thickness. The length of the part of the recording medium yet to be used is shown in a displaying part, according to the type of recording medium. When the residual amount of the recording medium of a given type decreases below a prescribed length, an alarm is issued which prompts the operator to make preparation for the loading of a new recording medium.

Abstract: An inner-cam type distribution fuel injection pump has a lubricating system for lubricating the interior of a cam chamber defined by an inner cam and a rotor with a lubricating oil having a viscosity higher than the viscosity of fuel oil. The pump is structured to prevent the fuel oil from leaking into the lubricating oil.

Abstract: An audio signal recording/reproducing system is used in a time-lapse video tape recording device for time-lapse recording a video signal on a magnetic tape at predetermined time intervals. The audio signal recording/reproducing system comprises a memory which stores an audio signal and time-compresses the stored audio signal to output it as the time-compressed audio signal at one field period, and a magnetic head for recording the one-field period audio signal on the magnetic tape. Each of the audio signal recording tracks recorded on the magnetic tape is arranged between two adjacent video signal recording tracks. The audio signal recorded on the magnetic tape is read out by the magnetic head and stored in the memory again. The audio signal stored in the memory is expanded in its time-base to be reproduced as continuous sound.

Abstract: Electrical contacts especially for use with electric breakers, consisting of (1) a base made from a silver-tin system alloy containing In, and (2) a clad over the base made from a silver-cadmium system alloy, the alloys having been internally oxidized. The clad (2) stands by to initial tests provided for electric breakers, and the base (1) stands by to the tests thereafter. The base has no segregation of tin oxides on account of internal oxidation of the base screened by the clad (2).

Abstract: A microcamera for photographing the image of an original document on a film, with an aperture for determining a photographing area. The size of the aperture is variable in accordance with a document size by moving an end edge of the aperture adjacent a film supply reel with an end edge thereof adjacent to a film takeup reel fixed. Aperture size variations effected in this manner is free from superposition of an image on a preceding image when the photographing area is enlarged from half size to full size, for example. Conversely, when the photographing area is reduced from fullsize to half size, a space between adjacent images may be the same as when the photographing area is not reduced.

Abstract: A helical scanning type magnetic recording and reproducing apparatus records a signal representing recording conditions on a magnetic tape when a recording is effected thereon, together with a PCM audio signal. At the time of reproduction, reproducing conditions are controlled so as to be the same as the recording conditions on the basis of the signal representing recording conditions reproduced.

Abstract: A solar cell including a semiconductor substrate, a diffused layer provided in the semiconductor substrate by diffusion of dopant impurities, and a contact made of metal paste formed on the diffusion layer. The metal paste includes metal powder which functions as the main contact material, glass frits, an organic binder, a solvent, and an element belonging to the fifth group of the periodic table.

Abstract: A distributor type fuel injection pump of the invention includes a rotor, a pair of plungers reciprocated in the rotor, the pair of plungers defining a pump chamber therebetween; a shuttle cylinder; a shuttle piston, movably located in the shuttle cylinder, for dividing the interior of the shuttle cylinder into first and second pressure chambers, the second pressure chamber being always connected to the pump chamber, thereby pressurizing the fuel in the second pressure chamber by pressurization of fuel in the pump chamber by the plungers and moving the shuttle piston to pressurize the fuel in the first pressure chamber; a distribution head for distributing and supplying the pressurized fuel in the first pressure chamber to each combustion chamber of the engine; a control rod for mechanically adjusting an initial position of the shuttle piston when the fuel is supplied to the first and second pressure chambers; and a spill hole for spilling the fuel in the second pressure chamber when the shuttle piston is mov

Abstract: Internal oxidized Ag-SnO system alloy electrical contact materials having a moderate initial contact resistance and having no depletion layer is disclosed. The alloy is internal oxidized by having it sandwiched between pure silver thin layers, and is cut horizontally right in two, simultaneously removing the depletion layer from the internally oxidized alloy.

Abstract: A high-density analog integrated circuit having built-in resistor elements formed simultaneously with the formation of the base of transistor is disclosed in which a high-resistance element is formed of an ion-implanted resistor, a low-resistance element is formed of a base-diffused resistor, and a pair of high-resistance elements are connected in such a manner that a difference between a signal current flowing through one of the high-resistance elements and another signal current flowing through the other high-resistance element is outputted, and in which an ion-implanted resistor having a high resistance and a thin film capacitor having a small capacitance make up a built-in time constant circuit, which makes it possible to integrate on one semiconductor chip circuits such as a filter circuit for video signal and an input bias circuit.

Abstract: Ag-SnO system alloy electrical contact materials. The Ag alloy before internal oxidation thereof contains Sn of an amount of 5-20 weight %, 0.5-15 weight % of which amount is in the powder form of SnO.sub.2. The existence of SnO.sub.2 particles in the alloy accelerates the internal oxidation speed, allowing oxygen to readily pass aside and between the particles, while the internal oxidation per se makes the alloy more dense by eliminating spaces between SnO.sub.2 grain particles on account of the volumeric expansion of Sn which results from the internal oxidation thereof.

Abstract: Electrical contact materials made from Ag-Sn-In system alloys which have been internally oxidized. A substratum or base part of the materials is internally oxidized after having been clad with a thin layer of alloys of the same alloy system, concentration of solute elements of which is, however, smaller than that of the substratum alloys, so that no segregation of the solute metal elements shall be produced within the substratum alloys. Electrical contact resistance and consequent temperature raise of the internally oxidized materials under operation are considerably lowered.

Abstract: Internal oxidized Ag-SnO system alloy electrical contact materials having a moderate initial contact resistance and having no depletion layer is disclosed. The alloy is internal oxidized by having it sandwiched between pure silver thin layers, and is cut horizontally right in two, simultaneously removing the depletion layer from the internally oxidized alloy.

Abstract: Electrical contact materials made from an internally oxidized Ag alloy containing 0.5 to 12 weight % of Sn. Internal oxidized structures which have been produced in the alloy at the forwardmost area along a progressive direction of internal oxidation and which are fine and free from the segregation of tin oxides, are employed as contact surfaces. Another surface opposite to said contact surfaces may be brazeable by having it subjected to a reduction or decomposition treatment of metal oxides about said another surface.

Abstract: A helical scan type magnetic recording/reproducing apparatus in which a magnetic tape is guided helically around a rotary magnetic head assembly over an angular range approximating to 360.degree.. Two magnetic heads are disposed relatively closely to each other at an angle smaller than 180.degree.. The rotary magnetic heads assembly performs a single complete rotation for a unit period, for example, one field period. In recording, video signal of the unit period undergoes time axis compression to be compressed to a period corresponding to a scanning period of the heads during which the magnetic heads are in contact with the magnetic tape in each rotation of the head assembly and supplied to alternately the magnetic heads which are so designed that the azimuth angles of the respective gaps differ from each other.

Abstract: In a video tape recorder of the two-head helical scan system, a wrap angle of a magnetic tape around a rotary head mechanism is set to more than 180.degree., e.g. about 220.degree., and an overlap recording section is provided in a recording track. A time compressed audio signal and a pilot signal for the tracking control are recorded in the overlap recording section. A frequency modulated luminance signal, low-frequency converted carrier color signal, frequency modulated audio signal, and pilot signal are mixed, and this mixed signal is recorded in another section of the recording track. Regulator means is provided to conjointly set the recording current levels of the low-frequency converted carrier color signal, frequency modulated audio signal, and pilot signal which are mixed to the frequency modulated luminance signal and recorded. The recording current levels of the time compressed audio signal and the frequency modulated luminance signal are respectively and individually set.

Abstract: A color signal processing circuit in a video tape recorder for recording a low frequency converted color signal has a voltage controlled oscillator for generating a carrier having a center frequency which is M times as high as a low-frequency sub-carrier frequency, where M is an integer, and a detection circuit for detecting a variation of the oscillation frequency of the voltage controlled oscillator in at least a reproduction mode. A suppression circuit suppresses the change of the oscillation frequency of the voltage controlled oscillator in response to the output signal from the detection means and a control circuit changes the center oscillation frequency of the voltage controlled oscillator depending on whether the signal is processed in the NTSC system or the PAL system in such a way that the suppression range for the change of the oscillation frequency of the voltage controlled oscillator by the suppression for the NTSC system is equal to or wider than that for the PAL system.