摘要:
A method for producing cutting tools incorporated in the present invention is carried out as follows: a shank portion and a drill portion are formed separately such that the inner diameter of a hole made in the shank portion is slightly smaller than the outer diameter of the drill portion. The rear of the drill portion is forcibly inserted into the hole of the shank portion at normal temperature which is room temperature. The diameter of the inner wall of the hole is thereby enlarged, resulting in a tight fitting. After the insertion of the drill portion in the shank portion, the drill portion may be ground to form a drill edge. Before the insertion of the drill portion in the shank portion, the shank portion may be quenched under vacuum or the like, or the surface of the shank portion may be hardened by nitriding.
摘要:
A device for mounting tubular members to structural members. The device is a unitary structure formed into two gripping arms, two flex arms and a retainer plate. Each gripping arm includes a bend and two pointed straight protrusions. Each flex arm includes two pointed bent protrusions and a stop having a bent lip. The retainer plate includes an opening for engaging a threaded member.
摘要:
A method for producing cutting tools incorporated in the present invention is carried out as follows: a shank portion and a drill portion are formed separately such that the inner diameter of a hole made in the shank portion is slightly smaller than the outer diameter of the drill portion. The rear of the drill portion is forcibly inserted into the hole of the shank portion at normal temperature which is room temperature. The diameter of the inner wall of the hole is thereby enlarged, resulting in a tight fitting. After the insertion of the drill portion in the shank portion, the drill portion may be ground to form a drill edge. Before the insertion of the drill portion in the shank portion, the shank portion may be quenched under vacuum or the like, or the surface of the shank portion may be hardened by nitriding.
摘要:
An improved structure of a connecting joint used for a case. The connecting joint has a substantially right-angled connecting element provided with a plurality of elongated insertion blocks which engage compartments formed in a hollow insertion plate. An expansion block is inserted at one end into a vertical slot formed by the arrangement of a plurality of the elongated insertion blocks, and the other end thereof is inserted into the compartments formed in the hollow insertion plate. The expansion block has a slot therein that engages a wall of the hollow insertion plate.
摘要:
A pan and fan housing assembly for a fan coil unit includes a primary pan having a wall defining an air passage through which air is directed by a fan in a fan housing powered by a motor. The fan housing is formed of two fan housing bodies snap-secured to each other and snap-secured to the primary pan air passage defining wall.
摘要:
A pair of torque-transmitting members are joined together in torque-transmitting relationship at an inner and outer tubular connecting part of each by connecting elements interposed within an annular recess formed between said inner and outer connecting parts, said connecting elements having acuminated portions and being formed of a material harder than the material of the connecting parts in order to penetrate the surface thereof when the connecting parts are pressed together thereby to hold the first and second members in torque-transmitting engagement.
摘要:
A cable termination arrangement includes a tapered socket body and a mating plug covered with a sleeve of malleable material. Cable strands are inserted and spread out inside of the socket. The plug and sleeve are pushed into the socket for forcing the strands into the sleeve. When a tensile force is applied to the cable, slippage between the cable and the socket is zero.
摘要:
An earth ground assembly includes: a tubular driving point in the form of a sleeve; a drive rod fitting into the upper end of the sleeve and having an edge-shaped section which clamps a conductor wire against the inside of the sleeve, the upper end of the sleeve having an outwardly extending lip through which the conductor wire extends; and joint tubes arranged end-to-end to form an extension on the drive rod.