Abstract: A fixing device for fixing an autofocus module to a mirror box of an SLR camera having a quick-return mirror accommodated in the mirror box, wherein the quick-return mirror has a half mirror portion so that a light bundle of an object which is passed through the half mirror portion is reflected by a sub-mirror to be incident on the autofocus module. The fixing device includes an adjustment bracket which is provided separately from the mirror box, the adjustment bracket is fixed to an underside of the mirror box, and the auto focus module is fixed to the adjustment bracket.

Abstract: A fixing device for fixing an autofocus module to a mirror box of an SLR camera having a quick-return mirror accommodated in the mirror box, wherein the quick-return mirror has a half mirror portion so that a light bundle of an object which is passed through the half mirror portion is reflected by a sub-mirror to be incident on the autofocus module. The fixing device includes an adjustment bracket which is provided separately from the mirror box, the adjustment bracket is fixed to an underside of the mirror box, and the auto focus module is fixed to the adjustment bracket.

Abstract: A bearing device for a rotary shaft is comprised of a porous sliding bearing and a felt ring fit around the sliding bearing. The sliding bearing and the felt ring are filled with lubricant oil. The felt ring is made of needle-punching polypropylene fibers of 0.4-20 micrometers in diameter. The felt ring is manufactured by shaping the polypropylene fibers into a felt sheet, heat-treating the felt sheet to eliminate fuzz from the sheet surfaces, and punching the felt sheet in a ring shape. The sliding bearing has a plurality of grooves on its outer peripheral surface with which the felt ring contacts. Each groove is formed to extend in a horizontal direction to restrict the lubricant oil from flowing downward.

Abstract: A mirror control apparatus 100; 200 for controlling a mirror 20 in a single lens reflex camera 10. The mirror 20 is supported for reciprocal rotation between a first position in a photographing light path POP and a second position out of the photographing light path POP. The mirror control apparatus 100; 200 comprises a drive mechanism 102; 202 and a brake mechanism 104; 204. The drive mechanism 102; 202 is operatively connected to the mirror 20 for applying drive power to the mirror 20 for rotation between the first and second positions. The brake mechanism 104; 204 is operatively connected to the mirror 20 for producing brake power which varies depending on at least one of factors affecting rotation of the mirror, the brake power serving as resistance against rotation of the mirror 20. Such factors include temperature in the camera 10 and orientation of the camera 10 relative to the gravity.

Abstract: There is provided a double walled pipe having an inner pipe and an outer pipe which is movable relative to the inner pipe in a longitudinal direction of the inner pipe. Acting on only the outer pipe with a pipe jacking power makes it possible to bury the double walled pipe, without damaging the rear end of the inner pipe and also generating an internal stress on the inner pipe. Consequently, it is avoided such a situation that even in use pinholes, cracks, etc. occur on the inner pipe, and thus it is possible to expect an execution with higher reliability.

Abstract: A method for aging steel-making slag comprising the steps of charging normal temperature steel-making slag crushed to the extent that the slag having a grain diameter of 25 mm or less which constitutes 80% or more of the total amount into a pressure vessel which can be closed tight enough to seal a pressure substantially higher than atmosphere. The pressure vessel is closed and pressureized steam is supplied into the said vessel for heating the said pressure vessel and slag to raise the temperature and the pressure in the said pressure vessel while discharging condensed hot water. The interior of the vessel is kept under a condition saturated by steam and pressurized up to 2 to 10 kg/cm.sup.2 G for 1 to 5 hours. The pressure in the pressure vessel is reduced to be equalized with atmosphere. The steel-making slag is then discharged from the vessel. Apparatus is provided for carrying out the above process and includes a pressure vessel having an opening lid for charging and discharging steel-making slag.

Abstract: There is provided a double walled pipe having an inner pipe and an outer pipe which is movable relative to the inner pipe in a longitudinal direction of the inner pipe. Acting on only the outer pipe with a pipe jacking power makes it possible to bury the double walled pipe, without damaging the rear end of the inner pipe and also generating an internal stress on the inner pipe. Consequently, it is avoided such a situation that even in use pinholes, cracks, etc. occur on the inner pipe, and thus it is possible to expect an execution with higher reliability.

Abstract: A device for restricting a movement of a sliding cover of a camera includes a photographing lens which is movable between a photographing position and a retracted position. A sliding cover is movable between fully-closed and photographing positions, at which the sliding cover covers the photographing lens when the photographing lens is at the retracted position and does not cover the photographing lens when the photographing lens is at the photographing position, respectively. An engaging member can move between an engaging position at which it can engage the sliding cover, when the sliding cover is at the fully-opened position and a releasing position at which the sliding cover is released.

Abstract: A data printing device is provided which comprises a light emitting device that includes a plurality of light emitting elements, and an imaging optical system for forming light spots corresponding to the light emitting elements on the film. Preferably, the imaging optical system satisfies the following condition: 0.6<.vertline.m.vertline.<1.5, where "m" represents the magnification of the imaging optical system. The light emitting device comprises a light emitting diode in which a plurality of light emitting elements are included on a single substrate. The plurality of light emitting elements are aligned along a straight line perpendicular to a direction of film winding. The imaging optical system includes of a single imaging lens or a plurality of lenses.

Abstract: A method for aging steel-making slag comprising the steps of charging normal temperature steel-making slag crushed to the extent that the slag having a grain diameter of 25 mm or less which constitutes 80% or more of the total amount into a pressure vessel which can be closed tight enough to seal a pressure substantially higher than atmosphere. The pressure vessel is closed and pressureized steam is supplied into the said vessel for heating the said pressure vessel and slag to raise the temperature and the pressure in the said pressure vessel while discharging condensed hot water. The interior of the vessel is kept under a condition saturated by steam and pressurized up to 2 to 10 kg/cm.sup.2 G for 1 to 5 hours. The pressure in the pressure vessel is reduced to be equalized with atmosphere. The steel-making slag is then discharged from the vessel. Apparatus is provided for carrying out the above process and includes a pressure vessel having an opening lid for charging and discharging steel-making slag.

Abstract: A data printing device comprises a light emitting device that includes a plurality of light emitting elements, and an imaging optical system for forming light points on the film which correspond to the light emitting elements. The imaging optical system includes at least one imaging lens and at least three reflecting surfaces that reflect the light from the light emitting device to bend the optical path along an arc of a cylindrical wall of a film space, such as a spool chamber or a cartridge chamber.

Abstract: In a method of recycling iron and steel industry waste by processing the waste as an object substance by the use of a rotary kiln, the object substance is changed into a valuable material while the object substance travels within the rotary kiln from an upstream side to a downstream side. The object substance is heated on the upstream side of the rotary kiln within a reducing atmosphere to be reduced and molten into a reduced and molten product. The reduced and molten product is quickly sent to the downstream side without being adhered to an internal wall of the rotary kiln. The valuable material is extracted from the reduced and molten product which may be directly discharged out of the rotary kiln or which may be discharged after the reduced and molten product is once kept in a basin formed in the vicinity of the downstream side of the rotary kiln.

Abstract: A device for restricting a movement of a sliding cover of a camera includes a photographing lens which is movable between a photographing position and a retracted position. A sliding cover is movable between fully-closed and photographing positions, at which the sliding cover covers the photographing lens when the photographing lens is at the retracted position and does not cover the photographing lens when the photographic lens is at the photographing position, respectively. A locking lever can move to a position at which it can engage a locking section of the sliding cover, when the sliding cover is at the fully-opened position. A rotative member rotates when the photographing lens is moved to the retracted position. A lock release member which is pivoted coaxial with the rotative member engages with the locking lever.

Abstract: A device for restricting a movement of a sliding cover of a camera includes a photographing lens which is movable between a photographing position and a retracted position. A sliding cover is movable between fully-closed and photographing positions, at which the sliding cover covers the photographing lens when the photographing lens is at the retracted position and does not cover the photographing lens when the photographing lens is at the photographing position, respectively. A locking lever can move to a position at which it can engage a locking section of the sliding cover, when the sliding cover is at the fully-opened position. A lock releasing member is actuated when the photographing lens moves to the retracted position. An intermediate member is actuated by an actuating force of the lock releasing member.

Abstract: An electronic part, specifically a red-eye prevention lamp, is suspended in a gap between immediately adjacent curved internal walls of a camera. The curved internal walls are those of a battery compartment and a film storage compartment. The red-eye prevention lamp is suspended by a control circuit board bridging the curved walls.

Abstract: There is provided a double walled pipe having an inner pipe and an outer pipe which is movable relative to the inner pipe in a longitudinal direction of the inner pipe. Acting on only the outer pipe with a pipe jacking power makes it possible to bury the double walled pipe, without damaging the rear end of the inner pipe and also generating an internal stress on the inner pipe. Consequently, it is avoided such a situation that even in use pinholes, cracks, etc. occur on the inner pipe, and thus it is possible to expect an execution with higher reliability.

Abstract: A wood material, into which a synthetic resin solution or the like is injected, is held from its surface and back by heating plates in a closed container. The inside of the heating plate is provided with a heating medium passageway through which a heating medium can flow. A heating medium tank is connected to the heating medium passageway through a heating medium feeding passageway and a circulating pump. Warm water or steam are fed to the heating medium passageway. The warm water or steam have the temperature which can volatilize a medium from the heating medium tank or can volatilize the injected solution. A vacuum pump is connected to the closed container. The pressure is reduced in the closed container correspondingly to the operation of the vacuum pump.

Abstract: At least one thermoplastic sheet is interposed between a pair of transparent thermoplastic cover sheets with a photograph interposed between the cover sheet and the thermoplastic sheet. The sheet assembly together with the photograph is pressed between a pair of flat electrodes of a high-frequency dielectric heating device. Then, the assembly is subjected to high-frequency dielectric heating.