摘要:
An extensible wrench handle that can be used with a removable wrench head. The wrench handle has a cross beam shaped primary handle over which an extension may be slid to various positions for increasing or decreasing torque. The wrench handle is also provided with a flexible head that is pivotal about a forward end of the primary handle. The flex head has a substantially square drive post which protrudes from a flat surface of the flex head, the edges of the drive post being convex curved surfaces. The wrench head is an open end wrench that has upper and lower jaws that are joined by a web. A neck is joined to the web and has a drive hole which extends through the neck. The drive hole is defined by sidewalls which are convex arcuate surfaces.
摘要:
A screwdriver and screw may be used in combination or with conventional screws and screwdrivers. The screwdriver has a head with forward and rearward faces. Curved driving surfaces on the faces extend from left and right side edges toward a longitudinal axis of the screwdriver. The screw has a slot with equal and opposite faces which are convex curved surfaces. The screw also has a bottom with protruding retainer lips and shoulders which extend upward along a side edge of each face for maintaining the driver in the slot. The bottom is a convex curved surface.
摘要:
Flexible leads for making electrical connection in microelectronic components includes two metallic layers. The structural or core layer of the lead is formed having a hardness greater than the hardness of the second layer. The relative hardness between the first and second layers is achieved by controlling the grain size during deposition of the respective layers from an electroless or electroplating bath.
摘要:
Metal leads are formed on a copper conductive layer by applying a first resist and a main resist over the first resist, and forming aligned openings in these resist. A bottom layer of cover metal such as gold is plated onto the copper conductive layer in these openings, followed by a principal metal such as copper. The main resist is then removed so as to expose edges of the principal metal layer. A jacket of cover metal is plated onto the exposed edges and surfaces of the principal metal layer. During this stage, the first resist prevents deposition of the cover metal except on the leads. The jacket merges with the bottom layer of cover material, so as to form a continuous coating extending around the perimeters of the leads. The first resist is removed, and the conductive layer is etched away. The cover metal protects the principal metal during the etching stage.
摘要:
A wrench for use in driving a hexagonal nut having a wrench head. The wrench head has upper and lower jaws rigidly joined together. The jaws have several faces that allow the wrench to engage the nut from three different positions. The faces are configured to prevent corner contact with the nut so as to resist rounding the corners off. Further, one drive position is configured to lock the wrench to the nut as torque is being applied.
摘要:
An open-end ratcheting-type wrench for use in driving a hexagonal nut has a handle and a wrench head that is joined to the handle. The wrench head has upper and lower jaws that are rigidly joined together by a web. The jaws have several faces that allow the wrench to be ratcheted about the nut to different drive positions without removing the wrench from the nut. The faces are configured to prevent corner contact with the nut so that the corners are not rounded off. A lock face is provided on the wrench to prevent the removal of the wrench from the nut during use. The lock face has a concave arcuate surface to allow ratcheting.
摘要:
The present invention provides a means for electrically connecting the corresponding conductors of two adjacent sections of a multi-phase electrical distribution system. The electrical connecting device has a body with two ends and defines a hollow passage connecting the two ends. A conductor clamping plates is slidably received within the passage. A number of electrical connectors are fixedly attached to the clamping plate such that each conductor receiving pocket includes one electrical connector. The clamping plate is selectively movable between a first position and a second position. In the first position electrical conductors from the two adjacent sections may be inserted into the passage at their associated ends of the connecting device. In the second position the conductors are clamped between the passage and the electrical conductors such that conductors from one section sharing common electrical connectors with conductors of the other section are electrically connected together.
摘要:
A wrench for driving a nut utilizes curved drive faces. The drive faces are convex and protrude inward toward a center line between the jaw portions. Notches are formed on each drive face near the free end. One wrench is adjustable, having a positioner that pushes the nut outward as the movable jaw closes. The positioner maintains the nut in a position in contact with the curved drive surfaces.
摘要:
A screwdriver blade has faces formed on front and back sides of a shank. Each face has a drive surface extending from each side edge inward toward a longitudinal axis. Each drive surface is inclined relative to a plane containing the axis and bisecting each of the side edges. A thickness of the blade increases from the shank distal end. Each of the drive surfaces appears curved when viewed in a distal end view. Each of the drive surfaces extends from the shank distal end to a face proximal end. A central portion between each of the drive surfaces may also appear curved when viewed in a distal end view, or it may be flat. The drive surfaces and the central portion may be formed at a single radius of curvature. The central portion may have a increasing width from the distal end or it may have a constant width.
摘要:
A screwdriver blade has faces formed on front and back sides of a shank. Each face has a drive surface extending from each side edge inward toward a longitudinal axis. Each drive surface is inclined relative to a plane containing the axis and bisecting each of the side edges. A thickness of the blade increases from the shank distal end. Each of the drive surfaces appears curved when viewed in a distal end view. Each of the drive surfaces extends from the shank distal end to a face proximal end. A central portion between each of the drive surfaces may also appear curved when viewed in a distal end view, or it may be flat. The drive surfaces and the central portion may be formed at a single radius of curvature. The central portion may have a increasing width from the distal end or it may have a constant width.