Abstract: A bar steel cutting tool in which a fixed blade body and a rotary blade body that is capable of rotating around a first shaft, by operating a handle, are provided at the front end of a tool base for shearing bar steel with concave blades formed on outer peripheries of the fixed blade body and the rotary blade body. The handle is so constructed that the front end of a proximal portion of the handle thereof is supported by a second shaft at a position above the tool base and equipped with an elongated hole extending obliquely backwards from the second shaft. The rotary blade body has an arm portion extending backwards, and forms branch portions which nip both the right and left sides of the proximal portion of the handle at the rear end thereof.

Abstract: A bar steel cutting tool in which a fixed blade body and a rotary blade body that is capable of rotating around a first shaft, by operating a handle, are provided at the front end of a tool base for shearing bar steel with concave blades formed on outer peripheries of the fixed blade body and the rotary blade body. The handle is so constructed that the front end of a proximal portion of the handle thereof is supported by a second shaft at a position above the tool base and equipped with an elongated hole extending obliquely backwards from the second shaft. The rotary blade body has an arm portion extending backwards, and forms branch portions which nip both the right and left sides of the proximal portion of the handle at the rear end thereof.

Abstract: An array antenna is located on an upper surface of a vehicle. The array antenna is oriented at a right angle to a radio wave blocking obstacle existing in a radio wave transmission path. A diffracted wave is effectively received at the shadowed portion where a direct wave is not transmitted because of the radio wave blocking obstacle. If the antenna dimension of its longitudinal direction is larger than that of the radio wave blocking obstacle, both direct wave and diffracted wave are received and therefore the reception power decrease caused by the radio wave blocking obstacle is further reduced.

Abstract: A ratchet wrench including a fixed jaw and a movable jaw attached to a body of the ratchet wrench and having V-shaped nut gripping portions opposing each other. The fixed jaw is pivoted to a forward end portion of the body and biased to rotate toward the movable jaw by a spring. An adjusting nut is provided rotatably about a longitudinal center axis of the body, and an adjusting screw rod is threaded into the adjusting nut so that it is movable back and forth along the longitudinal center axis of the body by rotating the adjusting nut in one direction or the other. The movable jaw is pivoted at a rear end portion thereof to the adjusting screw rod by a guide pin which is guided along a longitudinal slot provided in the body and, the movable jaw is biased to rotate toward the fixed jaw by a spring provided between the movable jaw and the adjusting screw rod.

Abstract: An oscillating drive apparatus for working tools which enables a large-diameter pipe to be readily and efficiently turned, cut or threaded without the need for a large working area. The apparatus comprises a casing body, a vise for holding a pipe, the vise being provided at the forward end of the casing body, a motor provided inside the casing body, a speed reducing gear train provided inside the casing body, and an oscillating arm for driving a working tool, the oscillating arm being provided on one side of the casing body so as to be oscillated by the final output shaft of the speed reducing gear train through an oscillating drive mechanism. Also disclosed is a working apparatus for pipes wherein a shaft is provided on the distal end portion of the oscillating arm of the oscillating drive apparatus in such a manner as to extend parallel to a pipe held by the vise and a wrench or cutter member is attached to the shaft.

Abstract: A cutting tool of the ratchet operated type comprises several elements. A movable blade having a plurality of notches along the rear end thereof is moved relative to a stationary blade by an opening and closing operation of a pair of blades through a push bar which is in engagement with one of the notches. A pawl for preventing the return of the movable blade is elastically biased so as to be kept in a position disengaged from all of the notches under normal conditions. The pawl is brought into engagement with one of the notches by the push bar only when the pair of handles are fully closed relative to each other. Due to the above construction, the cutting tool according to the invention brings about reduced wear of the pawl and the notches and an easy cutting operation.

Abstract: A pipe gripping tool includes a body, a fixed jaw secured to the body and having a bite face, a movable jaw povoted to the body in opposition to the fixed jaw and having a plurality of cooperating bite faces for gripping a pipe in cooperation with the bite face on the fixed jaw and a return spring anchored at one end to the movable jaw and at the other end to the body. The plurality of bite faces on the movable jaw are positioned at different distances from the bite face on the fixed jaw.

Abstract: A thread cutting machine for pipes which comprises a machine base on which pipe holding chucks, a pipe rotation drive mechanism, a thread cutting mechanism and a threaded coupling holding chuck mechanism adapted to hold a threaded coupling such as socket, elbow or the like in position are provided. The machine is capable of fastening the threaded coupling to the pipe after the pipe threads have been formed as well as the inherent pipe cutting-off and thread cutting functions.

Abstract: A thread cutting machine for pipes comprises a machine base on which pipe holding chucks, a pipe rotation drive mechanism, a thread cutting mechanism and a threaded coupling holding chuck mechanism adapted to hold a threaded coupling such as socket, elbow or the like in position are provided. The machine is capable of fastening the threaded coupling to the pipe after pipe threads have been formed as well as the inherent pipe cutting-off and thread cutting functions.

Abstract: There is disclosed a tool for stripping the insulating covering from a covered electrical wire which comprises one handle pivoted by means of a shaft to the other handle having a lower jaw at the leading end portion thereof and in which the leading portion of the main body of the tool has an electrical wire holding mechanism adapted to grip the wire upon closing of the two handles and cutting blades adapted to cut into and pull the cut insulator covering off of the core of the wire in the longitudinal direction of the handles upon the closing of the handles. The electrical wire holding mechanism and cutting blades project laterally of the handles.