Abstract: A surface acoustic wave device supported by a package body. At least one surface acoustic wave element having interdigital electrodes disposed on a propagation path of a surface acoustic wave on the piezoelectric substrate. These interdigital electrodes include an input-side interdigital electrode connected to a ground pad on the package body and an output-side interdigital electrode connected to another ground pad on the package body.

Abstract: A piezoelectric substrate having two reflectors along a propagation path of a surface acoustic wave and three interdigital electrodes provided on said piezoelectric substrate consecutively between the reflectors. A primary side electrode is connected to an input/output terminal and a secondary side electrode is connected to a second input/output terminal. Each interdigital electrode includes include pairs of electrode fingers, where the pair of electrodes for one interdigital electrode is different than a pair of electrodes for another interdigital electrode.

Abstract: A filter device includes at least two filter elements provided in a package, each of the filter elements passing only signals within a predetermined frequency band, the predetermined frequency bands of the filter elements having center frequencies which are distinct from each other. An input terminal is connected to and shared by respective inputs of the filter elements. An output terminal is connected to and shared by respective outputs of the filter elements.

Abstract: A double-mode surface-acoustic device having a piezoelectric substrate with two reflectors placed on the piezoelectric substrate and first through third interdigital electrodes placed on the substrate consecutively between the two reflectors. Each electrode containing first through third number of pairs of electrode fingers, respectively.

Abstract: A surface acoustic wave device includes a piezoelectric substrate of a single crystal LiTaO.sub.3 and an electrode pattern provided on the piezoelectric substrate. The electrode pattern contains Al as a primary component and has a thickness in a range of 0.03-0.15 times a wavelength of a surface acoustic wave excited on the piezoelectric substrate. The piezoelectric substrate has an orientation rotated about an X-axis thereof from a Y-axis thereof toward a Z-axis thereof, with a rotational angle of 39-46.degree..

Abstract: This invention relates to an acoustic surface wave device suitably used in a high-frequency circuit, in which high attenuation characteristics are provided.The present invention includes an acoustic surface wave element, a ceramic package having a ceramic substrate of a multi-layer structure, the ceramic substrate having a die-attach portion on which the acoustic surface wave element is mounted, the ceramic package having an input terminal and an output terminal connected to the acoustic surface wave element, the ceramic package having an opening located above the ceramic substrate, each of the input terminal and the output terminal having a ground terminal, and a metallic cap sealing the opening of the ceramic package. The metallic cap is electrically connected to one of the ground terminal of the input terminal and the ground terminal of the output terminal.

Abstract: A surface-acoustic-wave device includes at least first and second surface-acoustic-wave elements formed on a common piezoelectric substrate and cascaded with each other, each of the first and second surface-acoustic-wave elements including a plurality of interdigital electrodes having a plurality of electrode fingers overlapping with each other in correspondence to a path of a surface acoustic wave on the piezoelectric substrate, wherein the width of overlapping of the electrode fingers is changed between the first surface-acoustic-wave element and the second surface-acoustic-wave element.

Abstract: A surface acoustic wave device includes a piezoelectric substrate of a LiTaO.sub.3 single crystal, the crystal having X, Y and Z axes and a cut plane. The X axis of the crystal is oriented in a direction of propagation of surface acoustic waves. The cut plane of the crystal is rotated around the X axis at a rotated angle from the Y axis to the Z axis, the rotated angle being in a range between 40.degree. and 42.degree.. A pair of reflectors are formed on the substrate and aligned in a row in the direction of propagation. Interdigital transducers are formed on the substrate and aligned in the row in the direction of propagation, the interdigital transducers interposed between the reflectors, each interdigital transducer having pairs of mutually opposed primary electrode fingers and secondary electrode fingers, the interdigital transducers including at least a front transducer, a middle transducer and a rear transducer aligned in the row in the direction of propagation.

Abstract: In a duplexer, phase matching circuit patterns corresponding to filter chips are formed on a surface layer of a multi-layer ceramic package provided with filter chips having different central frequencies. An end of each of the phase matching circuit patterns is connected to a common terminal pattern.

Abstract: Disclosed is an image forming apparatus capable of operating to form an image both in a horizontal installation of the apparatus and in a vertical installation thereof. The apparatus comprises a rotary endless latent image carrier; a latent image forming unit for forming a latent image on the latent image carrier; a developing unit for developing the latent image on the latent image carrier with a powder developer; and a transferring unit for transferring the developed image on the latent image carrier onto a sheet fed via a feeding path. The apparatus further comprises; a sheet detecting unit having a detection lever rotating about a rotary shaft, with a line connecting a center-of-rotation to a center-of-gravity being set at 40.degree. through 50.degree. with respect to a direction-of-gravity, and a detecting element for detecting the detection lever.

Abstract: A piezoelectric transformer comprises a piezoelectric substrate extending in a first direction, a first electrode structure provided on the substrate for exciting an elastic wave propagating through the substrate in the first direction as a result of the piezoelectric transverse effect, and a second electrode structure provided on the substrate for converting the elastic wave to an electric voltage, wherein the first electrode group occupies a first area on the substrate while the second electrode group occupies a second area on the substrate.

Abstract: This invention relates to a austenitic stainless steel thin sheet devoid of work-surface roughening, produced by a continuous casting method of a strip comprising a composition which contains not greater than 0.09% of C+N and has an Md.sub.30 of 30.degree. to 60.degree. C., and in which colonies A comprising {112}<111>, etc., and colonies B comprising {110}<111>, etc., exist in a uniform mixture in the steel sheet. As to colony dimensions, d.sub.RD (A) and d.sub.RD (B) are not greater than 300 .mu.m and d.sub.TD (A) and d.sub.TD (B) are not greater than 200 .mu.m. Solidification cooling is carried out at a cooling rate of at least 100.degree. C./sec, and cooling is carried out to 1,200.degree. C. at a rate of 50.degree. C./sec after solidification. Cold rolling is effected by twice cold rolling with interposed intermediate annealing. In this way, there can be obtained a austenitic strip cast stainless steel sheet not causing work-surface roughening.

Abstract: A piezoelectric transformer comprises a piezoelectric substrate carrying thereon an input electrode structure provided on an upper major surface of the piezoelectric substrate for receiving an a.c. voltage for causing an excitation of an elastic wave in the substrate such that the elastic wave propagates through the substrate in a longitudinal direction, an output electrode structure provided on a lower major surface of the piezoelectric substrate for producing an output a.c. voltage by converting the elastic wave into an electric voltage, wherein the input electrode structure and the output electrode structure have a periodical structure in the longitudinal direction with a pitch corresponding to a wavelength of the elastic wave, and wherein at least one of the first and second electrode structures extend in the longitudinal direction from the first longitudinal edge to the second longitudinal edge substantially continuously.

Abstract: A process for producing a thin sheet of a Cr-Ni-based stainless steel having excellent surface quality and workability is produced by continuously casting a stainless steel represented by 18%Cr-8%Ni steel by means of a continuous casting machine having a mold wall surface that moves in synchronization with a cast strip, effecting rapid solidification at a cooling rate of 100.degree. C./sec or more into a cast strip having a thickness of 10 mm or less; after solidification thereof, initiating cooling of the cast strip from a high temperature at a rate of 100.degree. C./sec or more to 1250.degree. C. and preventing the occurrence of recuperation; holding the cooled cast strip in a temperature range of from over 900 to 1250.degree. C. exclusive for 5 sec to 2 min; and cooling and coiling the cast strip and subjecting the cast strip to annealing, pickling, cold rolling and annealing.

Abstract: A process for manufacturing a thin sheet of a Cr-Ni-base stainless steel having an excellent surface quality and material quality, which comprises casting a cast strip having a thickness of 6 mm or less from a Cr-Ni-base stainless steel including 18% Cr-8% Ni steel by a continuous casting wherein a casting mold is moved synchronously with the cast strip, and subjecting the cast strip to cold rolling to form a thin sheet product, wherein the cast strip immediately after the casting is coiled at a temperature of 800.degree. to 1200.degree. C. and subjected to cold rolling and final annealing to form a thin sheet product.

Abstract: A method of fabricating an optical switch including a stationary support member, a movable support member, and at least one pair of optical fibers, the pair of optical fibers being supported on the stationary and movable support members, respectively, so that an optical path between optical fibers is changed by moving the movable support member. The method comprises the steps of preparing a guide with V-shaped grooves, securing at least one optical fiber element on the surface of the guide, bridging and fixing the guide on the stationary and movable support members, and separating the guide along at least a line extending between the stationary and movable support members. Thus, the guide and the optical fiber element is separated into a first part supported by the stationary support member and a second part supported by the movable support member, to constitute the optical switch having at least one pair of optical fibers.

Abstract: According to the present invention, a stainless steel thin strip and sheet having a superior surface gloss and high rusting resistance is produced by heating a continuous cast slab of ferritic or martensitic stainless steel containing 10 to 35% by weight of Cr at a temperature of 1100.degree. to 1300.degree. C. selected according to the Cr content in a combustion atmosphere having an oxygen concentration lower than 7% while adjusting the furnace staying time from preheating to extrusion to within 260 minutes, carrying out hot rolling while adjusting the rolling-finish temperature to a level higher than 900.degree. C., carrying out mechanical descaling by adding a grinding and descaling agent, such as iron sand, having a maximum particle size smaller than 400 .mu.

Abstract: A method for recovering crystals from a slurry by supplying the slurry to a rotary sucking filter while rotating a cylindrical filter medium thereof to effect a sequence of operations of sucking filtration, washing and further sucking filtration, which method comprises conducting a sucking filtration while pressurizing the slurry side so as to maintain such a temperature and pressure that the filtrate of the rotary sucking filter will not reach a condition of supersaturation, whereby stuffing of the filter medium due to deposition of crystals from the mother liquor with increase in the slurry viscosity is prevented and the recovery of the crystals are realized efficiently over a long period of time. This method is suitable for recovering crude and purified crystals of terephthalic acid and can be applied also for the recovery of general crystilline products, such as hydroquinone, resorcin and so on from slurries of them.

Abstract: Disclosed is a process for the producing coldrolled strips and sheets of austenitic stainless steel, which comprises preparing a cast strip having a thickness not larger than 10 mm, which is composed of an austenitic stainless steel, by a continuous casting machine, in which the wall surface of a casting mold moves synchronously with the cast strip, and cold rolling the cast strip by a hard rolls having a surface hardness not lower than the Vickers hardness of 600. A preferred embodiment of the present invention is characterized in that crystal grains of the cast strip are made finer by cooling the cast strip at a cooling rate of at least 50.degree. C./sec in the temperature range of from the temperature for initiation of solidification of the cast strip to 1200.degree. C. and the cast strip is then coldrolled by the hard rolls, another preferred embodiment of the present invention is characterized in that the hard rolls are composed of a material having a Young's modulus of at least 30000 kgf/mm.sup.

Abstract: A method of rapidly and uniformly widthwise cooling a cast stainless steel strip when casting the strip by using a vertical type twin-roll continuous caster provided with a pair of cooling rolls having an outer circumferential surface composing a casting mold wall moving synchronously with the cast strip, which comprises the step of: pressing a cast strip having left a kissing point between the cooling rolls against the circumferential surface of one of the cooling rolls with a press roll disposed downstream of the kissing point and having a press roll surface geometry predetermined in accordance with a cooling roll crown and a cast strip crown, to rapidly cool the cast strip over the entire strip width, successively from the strip solidification completion and over a temperature range in which the growth of solidified grains of the strip is accelerated.