Abstract: A swashplate type variable displacement hydraulic device is so constructed that a plurality of plungers are slidably received in a plurality of cylinder bores arranged annularly around an axis of rotation, a back surface of a swashplate of which a fore surface is engaged by outer ends of the plungers is supported by a swashplate holder via bearing means, and a stationary swashplate anchor supports the swashplate holder to turn about a trunnion axis which intersects the axis of rotation at right angles. Opposing surfaces of the swashplate holder and swashplate anchor are formed as spherical surfaces of which a center is located at a position where the axis of rotation intersects the trunnion axis, the swashplate holder has a pair of trunnion shafts projected from opposite ends of the swashplate holder while extending along the trunnion axis, and the trunnion anchor is formed at opposite ends thereof with recesses with which the trunnion shafts are rotatably engaged.

Abstract: A shift control device in a hydrostatic continuously variable transmission in which a hydraulic closed circuit is formed between a swash plate type hydraulic pump and a swash plate type hydraulic motor, and a swash plate holder for supporting a motor swash plate of the hydraulic motor is tiltably supported on a stationary structure through a trunnion shaft fixedly mounted on the swash plate, wherein a drive shaft of a reversible electric motor is connected to the trunnion shaft through a reduction device which is constructed so that it transmits the rotation of the electric motor to the trunnion shaft at a reduced speed, but is brought into a locked state upon receipt of a reverse load from the trunnion shaft. This enables light adjustment of the tilting angle of the motor swash plate by use of a small-sized electric motor and reliable holding of the motor swash plate in a position at any angle.

Abstract: In a hydrostatic continuously variable transmission comprising a swashplate type hydraulic pump having a pump swashplate and annularly arranged pump plungers whose suction and discharge strokes are provided by the pump swashplate, a swashplate type hydraulic motor having a motor swashplate and annularly arranged motor plungers whose expansion and shrinkage strokes are provided by the motor swashplate, and a hydraulic closed circuit formed between the hydraulic pump and motor, the middle point of a discharge region of the hydraulic pump is angularly delayed at a given angle in a direction of rotation of the hydraulic pump relative to a tilting axis of the pump swashplate, and/or the middle, point of an expansion region of the hydraulic motor is angularly advanced at a given angle in a direction of rotation of the hydraulic motor relative to a tilting axis of the motor swashplate.

Abstract: In a swash plate type hydraulic system such as a hydraulic pump, a hydraulic motor of the like, a group of cylinder bores in which plungers engaging a swash plate are slidably received are annularly arranged in a cylinder block, and higher and lower pressure oil passages are concentrically provided in the cylinder block. Further, a group of distributor valves are provided in the cylinder block in a radially arranged configuration for controlling the connection and disconnection between the higher and lower pressure oil passages and the group of cylinder bores by radial reciprocating motion of the valves, and an eccentric wheel is provided eccentrically with respect to the center of rotation of the cylinder block to abut against the outer ends of the distributor valves so as to impart a reciprocating motion to each of the distributor valves. A shifting device is provided for changing the eccentric relationship between the eccentric wheel and the cylinder block.

Abstract: A recording apparatus has a printer mechanism for printing images successively on sheets of copying paper, and an image control circuit for delivering image information controllably to the printer mechanism so as to enable the latter to print the images successively. The image control circuit includes a plurality of page memories each for storing image information per single page, a first changeover switch for writing image information selectively into the page memories, and a second changeover switch for reading image information selectively from the page memories. When a sheet of copying paper is jammed in the printer mechanism, a microcomputer system controls the second changeover switch to select a switching mode to read an item of image information out of one of the page memories which stores the item of information to be printed on the jammed sheet of copying paper, for thereby allowing the image to be printed in a shorter period of time after paper jam clearance.

Abstract: A method and a device for controlling a welding power supply, employing a control device essentially including a first switch means consisting of at least one switch in element to be turned on and off to control the output current of the power supply, second switch means adapted to be inserted in a welding current attenuating path when the first switch means is in off state, and an impedance means consisting of at least one impedance element connected parallel with the second switch means.

Abstract: An apparatus for developing a latent electrostatic image comprises a developer receptacle containing a developer composed of carrier particles and toner particles, a developer applying mechanism for holding on its surface a part of the developer in the developer receptacle and applying it to a latent electrostatic image to be developed, a toner receptacle containing toner particles, and a toner supplying mechanism to be selectively operated to supply toner particles to the developer in the developer receptacle from the toner receptacle. A detector detects the electrical conductivity of the developer in the developer receptacle.

Abstract: A duster of an improved type for dust capturing efficiency, comprising a cylindrical stem with a continuous spiral thread extending along a portion thereof, a grip engaged with said stem, and fabric materials comprising a band of fiber or fibril bundles which are made of a ductile synthetic resin film or foil which has been split into fibers or fibrils and crimped. The bundles are arranged in a meandering manner. One edge of the band comprises loose edges while the other edge is held together by one or more strings. The secured edge is disposed within the thread with the ends of said material being engaged, respectively, by a supporting member provided at the tip of said stem and an engaging member provided at the root portion of the thread.

Abstract: A programmable sequence controller which enables display of the contents of a storage means for storing input and output data to and from a machine, and which permits numerical values to be set in the storage device from an external unit. The programmable sequence controller utilizes a sending and receiving unit for an exchange of commands and other data with a numerical control device in order to transfer display content and numerical values which have been set. This allows the contents to be displayed on display means provided in the numerical control device, and permits the setting of numerical values which are entered from a data setting means provided in the numerical control device.

Abstract: A method of preparing and executing a sequence program for effecting the sequence control of a sequence controller for a machine tool by executing a subroutine program. A sequence diagram is prepared, which diagram expresses a function command for a subroutine as data divided into control conditions and parameters. From the sequence diagram a sequence program is prepared, which program includes a command for reading data indicative of a control condition, and parameter data of which a subroutine is informed. The sequence program so prepared is then executed.

Abstract: A programmable sequence controller which need not be equipped with a tape reader for reading a paper tape bearing a punched sequence program or the like. A prepared sequence program or the like is punched in a paper tape in accordance with the standards of a paper tape reader which is provided in a numerical control device, and then is transferred from the numerical control device to a random access memory in the programmable sequence controller. The sequence program is read from the random access memory to permit the execution of sequential operations by processing the program.

Abstract: A method for manufacturing a duster and the duster manufactured therefrom are described, the duster head being made of strands of a blend polymer film of a mixture of isotactic polypropylene and polyethylene, which has been processed to be in an electret state, so that dust collecting and holding efficiency are improved and gross bulk, and texture of the head of the duster are highly improved with rich resiliency and a convenient usage being provided.

Abstract: A numerically controlled machine tool is equipped with a programmable sequence controller having a first storage area capable of storing operation commands, and a second storage area capable of storing a duplicate of the data planted in the first storage area without erasing the planted data. An operation command, when sent from a numerical control device to the machine tool, is stored in the first storage area and then, when the machine tool has completed the instructed operation, is read out from the first storage area and stored in the second storage area, this operation being repeated as each new command is issued. When electric power is connected to the machine tool, the data stored in the first and second storage areas is compared, an alarm being generated when the two sets of data do not agree.