Abstract: The present invention provides a composition for ceramic bonding, which comprises 3-55% by volume of ceramic particles, 1-25% by volume of inorganic binder, and a liquid medium, wherein the composition further contains hollow particles. The invention also provides a ceramic bonded article comprising a ceramic bonding layer formed by applying the composition to a bonding surface of a ceramic molded body and then heating the composition applied.

Abstract: A strength evaluation method for evaluating the strength of brittle material pieces by applying momentary loading a plurality of times, the momentary loading momentarily applying a tensile stress to a brittle material piece; and gradually decreasing the peak load value of the subsequent momentary loading.

Abstract: A pressurized fluidized bed combustion boiler system comprising: a boiler; a filtration apparatus with ceramics filters in a flue gas system; and a louver separator as a primary stage dust separator disposed between the boiler and the filtration apparatus.

Abstract: A filtering method of flue gas of a boiler employing a filter apparatus integrated with ceramic filters and provided with a control mechanism for regenerating the ceramic filter by reverse cleaning and a detecting mechanism for detecting directly or indirectly unburnt component. Valves of a compressed gas are operated by a signal from the control mechanism when flying-over of the unburnt component is detected to thereby start at once frequent reverse cleaning wherein the compressed gas is blown into the cleaned gas spaces and thereafter the frequent reverse cleaning having a period shorter than four minutes continues until the flying-over of the unburnt component decreases to a small quantity.

Abstract: A ceramic filter for a dust-containing gas, which comprises a filter base having an average pore size of from 20 to 100 .mu.m, and a filter layer having an average pore size of from 0.2 to 10 .mu.m fixed at least to the filtering side surface of the filter base so that the filter layer fills the pores open on the surface of the filter base.

Abstract: This patent application pertains to a camera provided with a running assembly arranged upon movement from a first position to a second position to make ready for the next exposure. The running apparatus is biased so to be urged toward the second position. The running apparatus may be locked in the first position against its bias force. An electromagnet release mechanism, responsive to actuation of a shutter release, frees the running apparatus from its locked condition by the electromagnetic force from the electromagnet.

Abstract: An optical system adjusting device for a camera comprises a first driver for driving the optical system of the camera; a second driver for driving the optical system at a finer pitch than the first driver; and a control system arranged to divide a degree to which the optical system is to be driven into a first degree to which the optical system is to be driven by the first driver and a second degree to which the optical system is to be driven by the second driver and to cause the first driver to drive the optical system to the first degree and the second driver to drive the optical system to the second degree.

Abstract: A camera comprising means capable of preventing image blurs; and instruction means capable of specifying a predetermined exposure mode if the means capable of preventing image blurs cannot completely compensate the image blurs.

Abstract: A ceramic filter for a dust-containing gas, which comprises a filter base having an average pore size of from 10 to 100 .mu.m, with the pore size ratio at positions of 75 vol % and 25 vol % of the accumulated pore size distribution being at least 1.3, and a filter layer having an average pore size of from 0.2 to 10 .mu.m fixed at least to the filtering side surface of the filter base so that the filter layer fills the pores open on the surface of the filter base.

Abstract: An optical system housed within a waterproof package includes, from front to rear, front lens and a rear group of lenses. For both of the front and rear surfaces of the front lens, proper numerical limits of the refractive power of the rear lens group are given to provide an amphibious camera which give a proper optical performance not only in the air but also under water without the necessity of focus adjustment.

Abstract: A camera comprises a photo taking optical system; driving means for driving the photo taking optical system; a shutter; switching means for causing transmission of the driving force of the driving means to the photo taking optical system to be changed over to the shutter; and control means for controlling the shutter by converting the opening time of the shutter into the driving degree of the driving means.

Abstract: A film take-up spool for a camera has a flange for film guide, wherein the flange is provided with guide means of a shape that upon riding of the film on the flange it directs the riding film away from the riding state as the spool rotates.

Abstract: A plate-like filter element includes a plate-like body made of a gas-permeable porous material having a pair of opposing end faces, a plurality of through holes formed in the plate-like body from one of the end faces to the other, wherein the plurality of through holes have inner wall surfaces which extend out toward both side surfaces of the plate-like body, the side surfaces being closer to the through holes. A filter unit is formed by a plurality of the plate-like filter elements stacked up in parallel to each other so that the end faces of the stacked filter elements are aligned, and passages separated from the through holes by the porous walls of plate-like bodies are formed between the adjacent filter elements. A filter device includes a metallic casing with an inlet for a dust-containing gas, an outlet for clean gas and an outlet for dust, which firmly support the filter unit therein.

Abstract: A focal length varying device for a camera comprises a photo taking optical system having a variable focal length; a discriminating device for discriminating whether or not adequate photographing is possible; and a system for automatically changing the focal length of the photo taking optical system on the basis of the result of discrimination made by the discriminating device.

Abstract: A supporting structure for ceramic tubes in a gas system in which a plurality of stages of tube support plates are provided in a substantially horizontal manner in a container, and ceramic tubes are supported with their axial lines being substantially vertical between the vertically adjacent tube support plates so that through holes formed in the tube support plates are communicated with the inner passages of the ceramic tubes, and metallic ring holders are respectively fitted to the outer periphery of the lower end portion of the tubes with interposed compacted layers while the metallic ring holders are in contact with the lower end faces of the tubes, and the ring holders are respectively in contact with and are supported by the tube support plates which are placed below the ring holders. Engaging means of the ceramic tubes to the tube support plates is also disclosed.

Abstract: In a camera having the body thereof molded with optical members inserted in a synthetic resin material, the parts of the resin material covering the periphery of each of the optical members on the inner and outer sides thereof are arranged to have a thickness ratio varying between about 1:0.5 and about 1:2. Each of chamfers "c" which are provided on the optical member in the direction of thickness "t" thereof is arranged to be about 0.1 (mm).ltoreq.c.ltoreq. about 0.2 t. Further, each intersecting angular part between two adjacent sides of the optical member is chamfered with the chamfer measuring about 0.1 l to 0.45 l or thereabout relative to the length l of the shorter of the two sides. The bevelling arrangement prevents the optical members from cracking due to uneven stress developing during the forming and contracting processes of insert molding.

Abstract: A waterproof camera has its body covered with a front cover and a back lid with camera mechanisms arranged within the body. The adhesion of the front cover and the back lid is improved to attain a waterproof effect with a packing carried jointly by the peripheral edges of the camera body and the front cover.

Abstract: There is disclosed a shaft holding structure for holding a metallic shaft embedded at its both ends in an article of resinous material by insert-molding in which at least one end of said metallic shaft extends into a void formed in said resinous material, said void having a sectional area larger than that of said metallic shaft.

Abstract: A data imprinting device provided with an input lock switch for disabling the input of imprinting data by data input switches, and a discriminating circuit for disabling the data input when the input lock switch is ON and only when all the data input switches are ON.