Abstract: A shear has a first elongate blade having a generally convex work-engaging-cutting-edge and an elongate handle portion and a second elongate blade having a generally convex work-engaging-cutting-edge and an elongate handle portion and a pivot means for pivotally linking together the first and second blades. In closing stroke, the blades are swingable toward each other and their cutting edges oppose each other in facing relationship with the defined included angle between the blades at any point of their intersection having certain value in the order of 17.degree..+-.3.degree.. The combined included angles of the bevels of the cutting edges of the blades is in the order of not less than 80.degree. and not more than 120.degree..

Abstract: First and second metal blades made from uniform thickness stock are fashioned into scissors which may be disposable suture scissors. Each of the blades is stamped from sheet metal, they are pivoted together, and handles extend in the opposite direction from cutting edges on the blades. Resilient means is provided by the handles being resilient and stop means are provided to limit the closed position of the cutting edges to prevent overriding, namely overclosing, of the cutting edges. The stop means includes first and second stop surfaces integral with the first and second blades, respectively. The stop surfaces are close to the pivot relative to the length of the handles, the blades have only frictional opposition to movement until the stop surfaces engage, and then the subsequent stressing of the resilient means establishes a cushioned stop of movement of the handles without any further movement of the cutting edges past the fully closed condition.

Abstract: Shears suitable for cutting sheet metal and other materials and having a pivoting handle and multiple blades to facilitate the making of a variety of useful cuts. The shears includes two handles and two pivotally connected blades. One handle provides a rigid continuation of a generally V-shaped blade; the other handle is free to swing between extreme positions through an arc of about 180 degrees. The swinging handle pivots on a pivot pin carried by one of the blades. The other blade has a pair of cutting edges to provide scissor action with the cutting edges of the V-shaped blade. A pivot pin extends generally transversely to and is located between the cutting edges at one side of the other blade, and the pivoting handle is free to swing thereon. Scissor action results as the pivot pin transfers the applied moment caused by squeezing the swinging handle relative to the other handle to the other blade to thereby rotate the blades relative to one another.

Abstract: Scissors or other two bladed cutting implements of the kind having a pair of pivotally connected blades, each blade having a cutting edge and a back edge forming respective opposite longitudinal edges of the blade. The improvement comprising forming the cutting edge of each blade so as to lie in the same plane as the back edge of the other blade in the closed condition of the scissors. Both the cutting edge and the back edge are formed at the junction of an inner broad surface of the blade and a respective longitudinal edge surface of the blade, and the back edge surface of one blade is coplanar with the cutting edge surface of the other in the closed condition of the scissors. The plane of those edge surfaces is at an angle other than 90.degree. relative to the plane of the broad inner surface of the blade.

Abstract: Safety scissors wherein the scissor members are composed of a metal member partially embedded in plastic in such a way that a part of the exposed metal serves as a cutting edge and the remaining exposed portion of the metal member bears the sliding friction when the two scissor members are moved relative to each other.

Abstract: A cutting tool including pivoted crossing arms provided with scissors-like cutting jaws each including a cutting edge portion extending radially inwardly and laterally outwardly for shearing engagement with an interposed work piece while urging the work piece radially inwardly toward the pivot.

Abstract: A tool of the nature of scissors, tongs, pliers or pincers is provided having a pair of lever arms pivotably attached together by a pivot pin, each having holder means at one end and tool-functional means at the other end on opposite sides of the pivot pin, for pivotable manipulative engaging movement of the tool-functional means by the holder means, comprising first and second lever arms, the first lever arm having a through slot receiving the second lever arm; the second lever arm having a central portion extending within the slot and a pivot pin immovably fixed to and extending through the central portion thereof and projecting outwardly on each side of the central portion; the projecting portions of the pivot pin defining pivot points for the pin; the pivot points of the pivot pin being cold-pressed into the walls of the first pivot arm within the slot, thereby defining in the walls cold-formed pivot sockets conforming in shape to the pivot point in a manner to pivotably mount the second lever arm on the

Abstract: A shears includes a pair of blade portions with opposed convexly curvilinear cutting edges extending longitudinally thereof assembled for pivotal movement between closed and open positions. The curves defined by the cutting edges are mirror images and, in the open position, intersect at a point spaced from the pivot means towards the outer end of the cutting edges. The cutting angle defined by tangents to the curves at the points of intersection over substantially the entire length of the cutting edges during closing movement is substantially constant and within the range of 12.degree.-30.degree.. The preferred shears have a rake angle of 4.degree.-14.degree. and have blade portions which are inclined towards each other to provide wiping action at the point of intersection along substantially the entire length of the cutting edges.

Abstract: A shearing cutter for wire and cable, particularly insulated metal wires and wire bundles as used in electrical and electronic circuits, is constructed in the form of a hand tool with elongated, hinged handles adapted to develop shearing forces between cooperating blades cantilevered beyond the hinge point from each of the handles. The blades are symmetrical in shape and define a substantially circular opening between semicircular bights sharpened into cutting edges in each of the blades. A wire or cable is maintained in a central location with respect to the aforementioned bights by the enveloping nature of the cutting edges, resulting in a clean, uniform shear plane.

Abstract: A pair of scissors with moulded plastics blades having moulded-in metal cutting elements, the cutting elements being contained mainly within the blades so that said blades are substantially of sandwich construction and the cutting elements being provided with holes or slots through which the moulded material extends.

Abstract: A scissors comprising a pair of halves pivotally mounted together at a medial portion, each of the halves consisting of a one-piece strip of metal having a blade portion extending in one direction from the medial portion and a handle portion extending in the other direction from the medial portion. Each scissor half is formed by stamping a blank from a flat sheet of metal, the blank having a generally sinuous portion at one end thereof for use in forming a hollow cylindrical handle portion adapted to receive a finger in the natural position and angle for applying a cutting force to the scissors. In making the scissors the cutting edge is formed on the blade portion while the blank is in the flat condition and prior to the bending and twisting operation to form the handle portion.

Abstract: A multipurpose combination tool based upon hand-operated shears is provided having special utility in rescue work. The shears comprise blade portions, a bevel edged recess for severing cables, an angled juncture associated with said blade portions to facilitate the cutting of thick sheet materials, a protective stub at the terminus of said blade portions, and other features.

Abstract: A plier-type cutting tool for cutting coaxial cables without deforming the cable includes a pair of longitudinally extending members joined by a common pivot member disposed near the jaw ends of the tool. Each jaw includes a pair of opposed, obliquely related cutting edges with a third cutting edge extending between the oblique pair in concave configuration. The oblique cutting edge nearest the open end of each jaw is sharpest, and is provided for cutting the insulation and outer tube of a coaxial cable. The third cutting edge of each jaw is harder and not as sharp, and is provided for severing the inner conductor of the cable.

Abstract: By electrically fusing a pin between the outer elements of a box hinge, and thereafter performing the hardening step, stresses which tend to cause instrument failures after a period of use are eliminated. Even if the pin fractures during use, the fact that it is fused to the outer elements of the box hinge prevents broken-off parts of the pin from falling out of the instrument.

Abstract: In a preferred embodiment of the present invention, there are provided scissors having cold stamped scissor blade elements which do not include any bend in the shank of either blade element, the difference in level of the respective blade elements relative to one-another being compensated for by having plastic insert rings mounted on each of opposite sides of each blade element's metal ring support, with the upper blade having its lower plastic insert of greater thickness than its upper plastic ring insert, and with the lower blade having its upper plastic ring insert of greater thickness than its lower ring insert, such that the unitary handle in the assembled state of one blade element is on the same level as the unitary handle in the assembled state of the other blade element in so far as respective upper surfaces extending in a common plane and respective lower surfaces extending in another common plane.