Abstract: A sanding tool for grinding a workpiece to be worked has a housing in which an electric motor is accommodated and a grinding assembly operatively connected to an output shaft of the electric motor to be swingable to perform a grinding operation, and the grinding assembly comprises a driving plate operatively connected to the output shaft of the electric motor to be swingable, a grinding plate attached to the driving plate to grind the workpiece and a member for operatively connecting the driving plate and the grinding plate such that the grinding plate is changed in an attaching position thereof in a plane parallel to a surface of the workpiece to be ground. First and second engaging members are formed to the grinding plate and the driving plate, respectively, for achieving an engagement therebetween when the grinding plate is pushed against the driving plate, and when the first and second engaging members are engaged, the rotational motion of the grinding plate to the driving plate is restricted.

Abstract: A power carving tool has a housing, a driving motor, a cam shaft engaged with the rotary shaft of the driving motor and having a cooling fan, a cam sleeve with a slanted cam surface, engaged with the cam shaft and reliably held by a ball bearing supported by the housing, and an output shaft moved reciprocatingly by bringing a contact portion provided at the rear portion thereof into contact with the cam surface thereby to maintain a stable rotation of the cam sleeve and to avoid mechanical loss.

Abstract: A handle structure of a power tool comprises a handle portion continuously formed with the main body of the power tool and a gutter-like soft grip for covering the handle portion, the soft grip having two first engaging projections on its inner surface and two second engaging pieces provided on each edge of the soft grip, the handle portion having two first receiving recesses provided on an arched receiving surface for receiving the soft grip to detachably engage the two first engaging projections and the second receiving grooves provided between the receiving surface and an outer front side surface of the handle portion for detachably receiving the second engaging pieces, the first engaging recesses and the second engaging grooves being completely separated from a space provided in the front portion of the handle portion for accommodating wires and the like.

Abstract: A drill press assembly having a base mountable to a work bench, a vertical column attached to the base and a drill head assembly having an electric motor and a quill. The drill head assembly is movably attached to the column. A rack is rotatably attached to the top of the column and is engaged by a crank and pinion mechanism attached to the frame of the drill head assembly which permits the drill head assembly to be displaced vertically and rotated about the column. A tilt table is attachable to the base of the drill press. A locking mechanism having a bolt passing through a longitudinal slot in the supporting base of the tilt table and a transverse slot in the base is engaged by an eccentrically mounted camshaft to lock the supporting base of the tilt table to the top surface of the drill press base. A pivoting frame is pivotably attached to the supporting base and contains a table plate. A fence is attachable to the top of the pivoting frame.

Abstract: A cutting tool such as jigsaw generally comprises a main body, a plunger provided for the main body to be reciprocally movable in an axial direction thereof, the plunger being provided with an opening and a cutout axially formed to a portion opposing to the opening, a cutting blade to be mounted to the plunger, and a blade mounting mechanism for mounting the blade to the plunger.

Abstract: An offset printing press comprises a plate cylinder onto which a printing plate is attached, a form dampening roller having an elasticity on its outer surface, a water fountain roller immersed into water in a water pan, and intermediate roller means for transferring the water from the water fountain roller to the form dampening roller. The intermediate roller means comprises a water oscillating roller which has a hydrophilic property on its outer surface and is capable of reciprocating in its axial direction with contacting the form dampening roller. Also, the offset printing press comprises first moving means for moving the form dampening roller close to and away from the plate cylinder; and second moving means for moving at least one of the water oscillating roller and the form dampening roller so that these two rollers can be moved close to and away from each other.

Abstract: An internal combustion engine comprises a vertical crankshaft rotatable in a crankcase, a piston reciprocable along a cylinder axis, and a push rod tube. The push rod tube communicates between the crankcase and a rocker box, and is positioned below the cylinder axis and upwardly inclined with respect to the cylinder axis. A cam gear agitates oil in the crankcase so that the oil is conveyed through the push rod tube into the rocker box and returns through the push rod tube to the crankcase under the force of gravity. In another embodiment, the engine comprises a crankshaft having an arcuate throw and a crankpin. A connecting rod has a continuously formed big end installable over the arcuate throw to cooperate with the crankpin. A flywheel is mounted to the crankshaft on a side of the crank pin opposite a balancing web, and has a radially offset center of gravity to balance forces applied to the crankshaft through the connecting rod by the piston.

Abstract: Each of intake and exhaust valves of an internal combustion engine has a valve retainer provided with a center hole through which the upper portion of each valve stem passes, a flange and a raised portion surrounded by the flange and around the center hole, a groove formed around the center hole, on the raised portion for receiving a pin inserted into a hole formed in the upper portion of the valve stem. The valve retainer can be easily assembled with a valve spring. Further, a cylinder head has an intake port comprising a lateral path which is in shape of a deep pan in cross section and whose height is gradually decreased from the inlet of the lateral path to a vertical path whose lower end has an opening portion to be opened and closed by a valve portion of the intake valve. Thereby, the mixing state of fuel and air is improved.

Abstract: An engine unit in which a crank shaft is arranged perpendicularly in its housing in the state of use thereof comprises a housing defining a crank chamber therein, a crank shaft disposed in the crank chamber to be rotatable, a piston-cylinder assembly disposed in the housing, a valve mechanism operatively connected to the piston-cylinder assembly for sucking and discharging air in the cylinder, and a valve moving mechanism for driving the valve mechanism so as to open or close the same. The valve moving mechanism includes a push-rod members, a push-rod cover member covering the push-rod members with a space therebetween. A rocker chamber is disposed in the housing and communicated with the space, and a drain pipe is disposed between a lower portion of the rocker chamber and a lower portion of the crank chamber so as to establish communication therebetween with an inclination in the state of use.

Abstract: Disclosed is a fiber of an organic, inorganic or metallic material or a simple substance wherein ultrafines of an inorganic or metallic material or a simple substance having an average particle diameter of 0.005-1 .mu.m are uniformly dispersed and deposited on 8-90% of the surface in a single layer. The fiber is produced by exposing a fiber of an organic, inorganic or metallic material or a simple substance to a gaseous stream forming ultrafines of an inorganic or metallic material or a simple substance by a vapor phase process, thereby contacting said ultrafines in the gaseous stream with said fiber in a state wherein the ultrafines are still active. The treated fiber is useful as a reinforcing material for a fiber reinforced composite.

Abstract: A cut waste discharging device for a circular saw blade of an electric power circular saw machine, which includes: a safety cover for covering an upper portion of the circular saw blade; a lower guard which is angularly movable into the safety cover in accordance with development of a cutting operation of a workpiece with the circular saw blade; and a partition wall provided along an inner peripheral wall of the safety cover so as not to interfere with the lower guard, thereby defining a passage of cut waste with the outer wall of the partition wall and the inner peripheral wall of the safety cover. With such an arrangement, the passage between the outer wall of the partition and the inner wall of the safety cover causes the cut waste, generated in the waste generating portion, to be led to a predetermined discharge place. Accordingly, the waste would not be splash within the safety cover and would not be splashed out of the predetermined discharge place.

Abstract: An output axis of a motor has an eccentric portion, a vibratory arm is vibratably supported at its central portion, connecting section of said vibratory arm with the eccentric portion is formed in shape of two crotches, the eccentric portion and the vibratory arm are connected to each other in a manner that the eccentric portion is inserted between the two crotches of the vibratory arm, thereby rotational movement of the output axis of the motor is converted into vibrational movement of the vibratory arm, and at least one of contact portion formed on the outer circumfrential surface of the eccentric portion or contact portions respectively formed on the inside surface of each of two crotches is formed in shape of a curved surface.

Abstract: A sanding apparatus comprises a sanding member having on a lower end thereof a flat sanding plate, and being able to oscillate a drive unit for oscillating the sanding member; a motion converting means having an oscillating arm, connected to a rotating output shaft of the drive unit, for converting a rotational motion of the output shaft to an oscillation motion; and a connecting means for connecting the oscillating arm of the motion converting means at one end thereof with the sanding member. The connecting means permits an adjustment of a securing angle of the sanding member to the oscillating arm of the motion converting means.

Abstract: A grinding machine has a driving mechanism for rotating a drive shaft, a sander supported on the drive shaft, a bracket provided swingably on a housing for supporting the drive shaft, a drive shaft moving mechanism for moving the drive shaft in the axial direction, a hollow member supported on the bracket for ratably support the drive shaft, a drive shaft position switching mechanism for moving the hollow cylinder in its axial direction to take selectably two positions whereby the drive shaft can take smoothly two positions in one of which the drive shaft is not moved in its axial direction, and in the other of which the drive shaft is moved it its axial direction.

Abstract: A printing machine in which a perforation pressure drum is disposed downstream of a paper feeding section, and a longitudinal perforation blade and a lateral perforation blade may be brought into contact with the perforation drum. A delivery drum is in contact with the perforation drum, and a numbering pressure drum is in contact with the delivery drum. A numbering box may be brought into contact with the numbering pressure drum. With such an arrangement, it is possible to enhance printing position precision and operational property.

Abstract: An electrode terminal holder is disclosed for holding two electrode terminals in contact with battery terminals of a power unit and for fixing the electrode terminals to a housing of the power unit. The electrode holder includes a first electrode holding portion and a second electrode holding portion for mounting the electrode terminals onto the first electrode terminal holding portion. The first and second electrode terminal holding portions having engaging portions for integrally coupling the first and second electrode terminal holding portions. The first electrode terminal holding portion has electrode terminal insertion holes provided at their inner surfaces with support walls for the electrode terminals. The the second electrode terminal holding portion has pressure pieces for the electrode terminals against the support walls of the electrode terminal insertion holes when the engaging portions are engaged.