摘要:
The present invention provides a manufacturing method for accurate, fine and efficient processing of a work piece to be processed and prevention of graphitization of the work piece to be processed, when sintered diamond is processed by a laser beam.The method provides process comprising steps of (a) irradiating outer circumference of a scribing wheel 2 with a laser beam from the side of the wheel, (b) moving the laser beam relative to the wheel 2, (c) forming continuously along the circumferential direction in the required space fine grooves with openings directed radially on a ridge site, (d) irradiating the laser beam onto the site to be processed at a speed of the laser beam relative to the work piece, and (e) forming the work piece into a minute shape within a depth of less than 200 μm.
摘要:
The present invention is characterized in that, in a powder magnetic core obtained by compaction of an iron-based magnetic powder covered with an insulation film, a saturation magnetization Ms is Ms≧1.9 T in a 1.6 MA/m magnetic field; a specific resistance ρ is ρ≧1.5 μΩm; a magnetic flux density B2k is B2k≧1.1 T in a 2 kA/m magnetic field; and a magnetic flux density B10k is B10k≧1.6 T in a 10 kA/m magnetic field. In accordance with the present invention, it has been possible to industrially carry out compacting iron-based magnetic powders under remarkably high compacting pressures. As a result, high-performance powder magnetic cores are obtained which have a high density, and which are good in terms of the specific resistance and magnetic permeability.
摘要:
A moving object detecting device employing a pair of Doppler signals as a pair of vector signals of respective received-wave signals representing momentary reflected waves from a moving object. These vector signals are processed to obtain signals denoting in which ones of predetermined zones for the vector rotation depending on the movements of the object the vector is momentarily present, and shifting states of such zone signals through the zones are traced to sequentially determine the direction and period of the vector rotation and to actuate an alarm or the like when the rotation is in a fixed direction.
摘要:
The present invention is an apparatus for filling a multi-powder including a powder box (10) including a plurality of powder chambers storing a plurality of powders whose constituent compositions differ in a divided manner, and a gas feed pipe (14) disposed on the bottom side of the powder chamber and having an introducing hole for introducing a gas, wherein it can fill a plurality of the powders into a cavity (24) at once through the bottom openings of the powder box by introducing a gas through the introducing hole to substantially equalize the respective flow resistances of a plurality of the powders. Thus, it is possible to fill the powders whose constituent compositions differ at once without disposing them in a mixed manner.
摘要:
An infrared-type intrusion detector for monitoring the presence of a person is disclosed. The detector has a plurality of concave reflector segments for defining separate fields of view. Infrared radiation emanating from the person in any of the fields of view is collected and focused upon a single sensing element to produce a cautionary signal representative of such detection. Plane mirrors are introduced in an optical reflection system of the detector to reflect the radiation from the reflector segments upon the sensing element, such as to reduce the spacing or dimension required for the optical system along the optical axis of the sensing element, whereby the detector is allowed to be made compact in size. Further, the optical system of the detector includes a device for selectively interrupting one or more paths between the respective reflector segments and the sensing element, such that the detector can receive the infrared radiation only from the selected or desired fields of view and ignore it from the undesired fields depending upon certain operating conditions, enhancing detection reliability.
摘要:
A process for operating blast furnaces is disclosed, which comprises assuming a plurality of reference spaces, each of which serves as a stacking space for burden material and is defined by a plurality of line segments having inclination angles .theta..sub.1 and .theta..sub.2 with respect to a horizontal line on a surface of a previously stacked burden, before a predetermined volume of the burden material is charged from a charging equipment; settling a newly stacked surface of the burden in one of the standard spaces in such a manner that the newly stacked surface consists of two line segments having inclination angle .theta..sub.1 and .theta..sub.2 with respect to the horizontal line and intersecting with a falling trajectory of the burden so that a space defined between the newly stacked surface and the previously stacked surface corresponds to the predetermined volume of the burden material; and then charging the predetermined volume of the burden material from the charging equipment up to the position of the newly stacked surface on the previously stacked surface.
摘要:
A switch employing such magneto-sensitive switching element as, for example, reed switch or the like and generally used for crime prevention purpose with a high reliability, wherein the switching element is initially set in either one of its ON and OFF states by a permanent magnet disposed adjacent the element and rotatably about its central axis perpendicular to its longitudinal axis and such initially set state of the element is turned to the other state to actuate an alarm device when another permanent magnet mounted, for example, to a door approaches the rotatable magnet and magnetically varies initial relationship of the rotatable magnet to the element.