Abstract: An engine (40) comprising a piston (2); a top ring (3) and a second ring (4) attached to the piston (2); partitioning members (9)(10) attached to the piston (2) and connecting the top ring (3) and the second ring (4) so as to form a gas chamber (8) at the side surface of the piston (2); a gas passage (15) for communicating the gas chamber (8) to an upper surface (7) of the piston.

Abstract: A glass plate working machine includes table (20) on which glass plate (22) is placed, breaking unit (3) for forming a cutting line on glass plate (22) placed on table (20), and pressing the glass plate in the vicinity of a portion of the glass plate (22) formed with the cutting line to break that portion off; and moving unit (67) connected to the breaking unit (3) for moving same linearly along a surface of glass plate (22) placed on table (20). Breakage by breaking unit (3) and movement by moving unit (67) are controlled by a numerical control unit.

Abstract: A rotary engine that comprises a rotor having two side faces, a side housing disposed facing to one of the two side faces of the rotor and a center housing disposed facing to the other of the two side faces of the rotor. The side housing has an intake port formed therein. Also, the center housing has an intake port formed therein. The intake port of the center housing has an opening end which is dislocated from an opening end of the intake port formed in the side housing facing thereto to a retard side. A space is formed between the side face of the rotor and the center housing. And a relief hole is provided in the center housing in a dislocated portion of the opening end of the intake port of the center housing so as to escape a blow-bye gas pressure from the space.

Abstract: A numerical control apparatus for grinding a peripheral edge of a glass sheet, comprises a grinding head having a grinding wheel which is supported in an air-floating manner by an air cylinder and subjected to angularly rotating control so that the grinding wheel is brought into contact with the peripheral edge of the glass sheet, and a brake means for restricting an air-floating movement of the grinding wheel.

Abstract: A glass plate grinding apparatus comprises holding members attached to a chain moved by a rotationally driven sprocket, a belt conveyor for conveying a glass plate while seizing the plate in co-operation with holding members, and a grinder for grinding the edge of the glass plate being conveyed.

Abstract: A rotary engine in which rollers are inserted between the side wall of a seal groove and an apex seal such that the side wall of the seal groove and the apex seal are brought into rolling contact, the rollers are enhoused within a recessed groove formed in the side wall of the seal groove or in the side surface of the apex seal, and both ends of the recessed groove are enhoused in the corner seals assembled at both ends of the rotor so that the recessed groove is sealed.

Abstract: A glass plate fabrication machine under automatic control comprises a work table moving linearly along the direction of feeding glass plates, a block moving linearly in the direction in perpendicular to the linear moving direction of the work table, a grinding station disposed to the block by means of a rotating device that rotates around an axis, as the center, vertical to each of the linear moving directions of the work table and the block, a cutting station disposed along with the line in parallel with the linear moving direction of the work table passing through the center of the axis for the rotating device on the block, a glass plate fixing block and a glass plate cutting table disposed on the work table at the positions corresponding to the grinding station and the cutting station respectively, and a cracking station supported on a machine base above the linearly moving work table between the grinding station and the cutting station for raising and cracking the glass plate.

Abstract: A glass plate grinding apparatus has a press conveyor disposed on one side of a glass plate where a grinding wheel is disposed and a support conveyor disposed on the other side of the glass plate, the press conveyor being constituted by a caterpillar conveyor having holding members attached to an endless chain and the lower ends of the holding members being situated above the lower end of the support conveyor to form a step, wherein each of the holding members of the press conveyor has a thin plate-like member extended downwardly that presses the glass plate to the support conveyor. The press conveyor is supported vertically adjustably to the machine main body by way of a vertically elevating device, such that the thin plate-like member is situated between the grinding wheel and the glass plate when the press conveyor is lowered.

Abstract: A reciprocating engine comprising a cylinder, a piston performing reciprocating movement within the cylinder, a crank shaft performing rotational movement, a connecting rod connected rotatably at its one end to the crank shaft and at its the other end to the piston, and rollers each mounted on the side portion of the piston, in which the piston is in rolling contact with the cylinder through the rollers.

Abstract: A reciprocating engine comprising a cylinder, a piston performing reciprocating movement within the cylinder, a crank shaft performing rotational movement, a connecting rod connected rotatably at its one end to the crank shaft and at its the other end to the piston, and rollers each mounted on the side portion of the piston, in which the piston is in rolling contact with the cylinder through the rollers.

Abstract: A grinding machine having a table provided with a plurality of fixing stands in tandem for fixing glass plates and a head stand carrying working heads equipped with working wheels rotatably in the same number as the fixing stands comprises means for causing the table and the working heads to conduct a relative movement in two directions in a horizontal plane, means for orbitting the working wheels around vertical axes. The relative movement of the table and the working heads in the two directions and the orbitting movement of the working wheels around the vertical axes in the machine are controlled by a numerical control device in which the face of the glass plates to be ground and the grinding face of the grinding wheels are always kept at substantially a same contact angle.

Abstract: A beveling machine having a table provided with a plurality of fixing stands in tandem for fixing glass plates and a head stand carrying working heads equipped with working wheels rotatably in the same number as the fixing stands comprises means for causing the table and the working heads to conduct a relative movement in two directions in a horizontal plane, means for spinning the working wheels around a vertical axes. The relative movement of the table and the working heads in the two directions and the spinning movement of the working wheels around the vertical axes in the machine are controlled by a numerical control device in which the face of the glass plates to be ground and the grinding face of the grinding wheels are always kept at substantially a same contact angle.

Abstract: A glass plate edge beveling machine comprises a first chain conveyor mechanism provided with a supporting means, a second chain conveyor mechanism provided with a pressing means and a plurality of grinding means for beveling the lower end portion of a glass plate gripped between and transported by the supporting means and the pressing means, in which the supporting means comprises a plurality of unit members mounted on an endless chain and consisting of a base plate and a backing up plate, and on the surface of the backing up plate there is provided at least one projection raised toward the glass plate so that at least the lower portion of the glass plate is concavely curved.

Abstract: A glass plate edge grinding machine in which the belt of one belt-conveyor is supported by a plural number of pressing rollers arranged in a series inside said belt which the belt of the other conveyor is disposed on the opposite side with the interposition of the glass plate to the position of the arranged grinding wheels and supported all over the length thereof by a rigid backing-up plate disposed inside said belt, said backing-up plate being smoothly curved from the upper end to the lower end thereof in the direction far away from the glass plate so as to face the belt of said other conveyer, the glass plate is pressed in accordance with the curved surface of the backing-up plate when held through the belt on either side by pressing rollers, and the spindle of each grinder holding a grinding wheel is supported by a spindle supporting assembly which enables said spindle to move substantially in the radial and axial directions.