摘要:
A cylindrical diamond body is shaped to form a truncated conical portion. A conductive layer is deposited on the diamond body extending from the truncated end to the other end of the body. The conical portion of the body with the conductive layer being attached thereto is lapped to remove portions of the layer and the diamond body to form a pair of substantially flat surfaces extending from the truncated end toward the opposite end leaving the conductive layer to form a narrow width electrode for picking just one information signal stored in the form of minute pits along a spiral track or concentric tracks.
摘要:
A coil assembly comprises a plurality of conductive spiral pattern layers which are piled up via (an) insulating layer(s) on a wafer. The electrical connection between the spiral patterns is established by means of a conductive member, which is a portion of the upper spiral pattern layer, filled in a through-hole which is made in the insulating layer so that the spiral patterns are connected in series to develop a high voltage when the coil assembly is moved in a magnetic field.
摘要:
Disclosed is a method of fabricating rigid flexible PCBs. In the method, a self-detachable adhesive tape is used to separate a wafer and a substrate from each other in the course of conventionally fabricating a semiconductor wafer, is employed to avoid inherent problems occurring in the conventional method of fabricating rigid flexible PCBs.
摘要:
A focus control apparatus for a multilayer optical recording medium performs an adequate focus jump on a multilayer optical recording medium. Threshold values are set according to the amount of a level change in a focus error signal of a loaded multilayer optical recording medium, and focus jump control is conducted based on the result of comparison between the level of the focus error signal and the set threshold values. Positive and negative threshold values to be compared with the level of the focus error signal to detect a zero-crossing point of the focus error signal are set in accordance with the amount of a level change in the focus error signal, after which an acceleration operation of the focus actuator is started in response to a focus jump instruction to shift the focus position of read light for a focus jump, the acceleration operation is stopped in accordance with zero-crossing detection, a deceleration operation of the focus actuator is started thereafter and is stopped in accordance with zero-crossing detection, so that the operation returns to the focus servo operation.
摘要:
A fuel regulation apparatus of an engine for a model which is possible to regulate the flow rate of the fuel according to the rotational frequency of the engine is provided. A main body 31 of a fuel regulation apparatus 30 is provided with a fuel inlet 32, a fuel outlet 33, and an air inlet 42 to which air pressure from a crankcase is applied. The inlet 32 and the outlet 33 are connected therewith through a passage 34 having a seat face 37. A regulating valve 35 is placed in the passage 34 to close the seat face 37. A spring 38 pushes the regulating valve 35 in such a direction as to close the seat face. The other end of the regulating valve 35 is in contact with a piston 39. A position of an air inlet 42 can be adjusted by a screw 43. The spring pushes the piston 39 in such a direction as to open the seat face 37. The outlet 33 is connected to a fuel injection apparatus. The fuel injection apparatus injects the fuel into a crankcase. The piston is pushed according to air pressure in the crankcase 8 corresponding to rotational frequency and the seat face is opened. The flow rate can be controlled according to the rotational frequency of the engine. The fuel which is apt to be insufficient at the time of high speed can be increased and the fuel which is apt to be dense at the time of low speed can be throttled.
摘要:
Fuel to which a predetermined pressure is applied is supplied to an electronically controlled fuel injection system of a engine for models in order to improve the rotation stability during low speed operation and the response to rapid acceleration or deceleration. The pulsatory air pressure is generated in a crank chamber of a engine for models during operation. An air pressure intake guide 51 of a fuel pressure control valve 1 receives air pressure from the crank chamber. The air intake guide is provided with an excessive pressure leak valve the actuation pressure of which is adjustable. The air pressure intake guide communicates with interposition of a check valve 56 to a controlled air pressure supply passage 54 which communicates to a fuel tank. The check valve 56 supplies the positive pressure of the pulsatory air pressure from the controlled air pressure supply passage to the internal of the fuel tank. All the positive air pressure supplied to the air pressure intake guide 51 is supplied to the fuel tank when the pressure in the fuel tank is below a specified pressure. The air pressure supplied to the air pressure intake guide 51 actuates a control ball 60 of the excessive pressure leak valve 57 and is released to the outside. The check valve 56 prevents the air pressure in the fuel tank from flowing inversely.
摘要:
An electronic equipment has a stick as a movable input device provided to be manually moved. The position of the stick is detected. In accordance with the detected position, the movement of the stick is restricted within a predetermined movable range so as to be moved a plurality of predetermined areas. The area in which the stick is located is detected. In accordance with the detected area, corresponding control data stored in a memory are read out, and the electronic equipment is controlled by the read out control data.
摘要:
A photoconductive type liquid crystal valve maintains good gradation contrast characteristics in a projection image irrespective of if and when a possible temperature change occurs. The photoconductive type liquid crystal light valve comprises a laminated body including a liquid crystal layer 15, a photoconductive layer 15, and a light shielding layer 17, and a pair of driving electrodes which sandwich the laminated body and form an image forming area. A pair of temperature detecting electrodes are provided at positions out of the image forming area to sandwich at least the light shielding layer and detect a change in impedance of the light shielding layer, thereby detecting a temperature change of the light valve. By changing the level of a driving voltage signal which is supplied to the driving electrode on the basis of the detected temperature change, the gradation characteristics and contrast can be held constant from the time point of the initial setting of the black level even when the temperature fluctuates.
摘要:
An optical pickup device, which can effectively prevent occurrence of trouble in recording and reproducing of information due to the fact that an objective lens for each optical beam is contaminated while not adding unnecessary parts and while reducing a cost, is provided. An optical pickup device (P1) which performs the recording or reproducing of information in or from an optical disc (13) by using an optical beam (B) or (D), comprises: objective lenses (11) and (12) on which cleaning films which are activated by radiation of the optical beam (B) and clean their surfaces are formed in an optical path, and a control unit (15) for setting an optical path of the optical beam (B) in such a way that the optical beam (B) reflected by the optical disc (13) is radiated on the objective lens (12).
摘要:
Alpha alumina powder having a regulated particle size, a uniform particle shape and a narrow particle size distribution and further a low halogen content is produced by calcining at least one starting material selected from transition alumina and alumina compounds in a halogen-containing atmosphere which comprises a hydrogen halide gas, a halogen gas or a mixture of a halogen gas and steam and contains at least 0.1% by volume of at least one halogen-containing gas selected from the group consisting of hydrogen halide gas and halogen gas, and removing halogen from a calcined material. The produced alpha-alumina powder is excellent in a packing property and homogeneously packed.