Abstract: A motor-driven chain saw is electrically operated by means of a universal motor and has two brake systems operating independently of one another. A mechanical brake system serves as a safety brake and when actuated, the mechanical brake system brings the saw chain to a standstill instantaneously. The second brake system is an electric coasting brake, which when the switch is released stops the saw chain quickly but without recoil. The electrical braking is effected by reversing the polarity of one pole coil of the field winding and short-circuiting it with the rotor winding.
Abstract: A cutter for automotive seatbelts and restraint harnesses, for use in emergencies, comprises a flat body portion containing a protected blade, access to the blade being provided by means of an elongated slit into which the seatbelt fits. A holder is provided, for releasable mounting on the automobile interior at a convenient location, into which the cutting device is a releasable snap fit.
Abstract: A pneumatically actuated hole punch which employs a ball and die punching arrangement in which the ball is free floating and the punching impact is between the ball and the plunger rather than between the ball and the die. The plunger incorporates a concave surface to correctly position the ball relative to the die upon cutting of the desired opening.
Abstract: A cutting tool for plastic tubes or the like including a pair of pivotally connected handle members. One member is defined by a pair of sidewalls interconnected by spaced web portions, an integrally formed jaw for supporting a tube to be cut, pivot structure for pivotally supporting a cutting blade and a slot through which the cutting blade extends. The second handle member carries a ratchet plate having a aperture defining a plurality of ratchet teeth. The ratchet plate is secured to the second handle member by the co-engagement between a pivot pin and an aperture formed in the ratchet plate and a mounting edge that abutably engages an abutment wall formed by the second handle member. The cutting blade is mounted to the first member by a pivot assembly which is easily removed to release the blade.
Abstract: A chain saw attachment for a portable chain saw. The chain saw attachment comprises a cutter head journalled on the cutter axle and having four planing knives, two mounting arms removably securable to the chain saw bar, a chain sprocket engaging and being rotated by the saw chain, a driving sprocket rotated in response to rotation of the chain sprocket, a driven sprocket fixedly attached to the cutter head, and a planer chain engaged by the driving and driven sprockets so as to transmit power from the saw motor to the cutter head. The planing knives are arranged conventionally on the cutter head. The mounting arms the ends of the cutter axle so as to hold the cutter axle and cutter head perpendicularly to the saw bar. A planing guide is provided for use with the planer attachment.
Abstract: A folding tool assembly including two C-shaped handle pieces pivotally engaged to the end of the tool to fold-over onto the tool in one pivotal limit or to fold against each other at the other limit to expose the tool. The pivotal end of the tool includes a cam surface opposed by springs from each handle piece including distentions in the surface for preferred spring alignment. Additionally, the pivotal end of each piece is shaped to oppose the other unless displaced in pivotal engagement along a slot.
Abstract: A lockable folding knife utilizes a simplified, easily manufactured combination pivot and locking pin mechanism to create a strong locking action between the hub of the knife blade which pivots about the pivot pin, and the locking pin which is connected to and moved by the pivot pin when it is displaced in an axial direction.
Abstract: A knife cylinder for processing a continuous web has a plurality of knife blades mounted therein by metallic bellows cylinders located in grooves which receive the knife blades. At least one force transmission element is likewise located in each groove between the blade and the bellows cylinders, or between the bellows cylinders and an opposing wall of the groove. Such elements contain pressure medium passageways connected with a pressure medium generating assembly for internally pressurizing the bellows.
Abstract: A shear attachment is provided with fixing means so that it can be replaceably mounted in place of a bucket on the end of an arm of an excavator, the attachment comprising a pair of co-operating shearing jaw members, one of which is attachable to the arm of the excavator and carries a piston and cylinder device for actuating the other jaw member.
June 24, 1985
Date of Patent:
June 2, 1987
The Dudley Shearing Machine Manufacturing Company Limited
Abstract: A portable motor-driven cutter for cutting off a sheet material includes an eccentric shaft rotatably supported by a gear case and a gear cover, an L-shaped driver arm having an upper end rotatably fitted over an eccentric portion of the eccentric shaft, a cutting blade detachably mounted on the lower end of the driver arm, and a scribing blade detachably mounted on a base on which the gear case is mounted. When the eccentric shaft is rotated by a motor, the cutting blade is moved in an eccentric pattern to cut off a sheet material along a straight line scribed by the scribing blade. The cutting blade and the scribing blade are produced from a single break-off disposable cutter blade.
Abstract: A wallpaper trimming tool for cutting wall coverings on outer wall corners. The tool comprises a pair of rectangular blocks secured together with a pair of cutting blades spaced from an extension of one block by an intermediate sheet of shim material, cutting edges of said blades extending co-planar with the ends of the blocks.
Abstract: An orthopedic knife for a one-handed person, the knife comprising a blade, a hold-down member closely associated with the blade, and an extending handle pivoted to both blade hold-down member at spaced points such that the blade reciprocates as the handle is oscillated and the hold-down member is lodged with respect to an object to be cut.
Abstract: In a cutting head for an electric-motor-driven filament-type cutter the automatic adjustment of the length of the filament is effected in that intermittently a rotational movement occurs between a filament spool (36) and a sleeve (24) mounting said spool for axial displacement. The sleeve (24) is provided on the outside with locking cams and the filament spool on the inside with cams cooperating therewith. The sleeve (24) can be pushed in by hand against spring pressure to cancel the intermittent locking. For automatic filament adjustment a centrifugal adjustment is provided. For this purpose at least two radial ball slots (40) are provided between the housing portion (14) and a radial extension (48) of the sleeve (24) and in the ball slots balls (44) are guided which are adapted to be urged outwardly by centrifugal force.
Abstract: A cable jacket slitting apparatus automatically pierces a cable jacket to a controlled depth at a tangent between two adjacent wires and automatically follows the tangent path as the jacket is slit. Two semicylindrical cam halves, (1, 23) disposed in aligned opposition within a housing (30), include longitudinal recesses (2, 24) having grooved sidewalls (4, 26) which conform to the helical contour of an electric cable jacket (5). The two cam halves are driven into mutual contact by a contoured surface (37) on the housing sidewall (31), the two cam half recesses forming a passage (48) which loosely grips the cable within the grooves in the sidewall. One of the cam halves carries a cutting rod (7) with a knife end (8) which pierces the cable jacket between a pair of adjacent wires. As the cable is drawn through the passage, the cam halves rotate about the longitudinal axis of the cable, helically slitting the jacket in a continuous helical direction around a longitudinal axis between a pair of adjacent wires.
Abstract: In framework sections for awnings link arrangements are used in which the link bodies are connected to each other by means of cotter pins or similar devices. According to the invention two link bodies (1 and 2) are joined to each other by means of a hook (15, 16, 17) and an eye (6,7,8) so shaped that the two link bodies (1 and 2) are movable in relation to each other in transverse direction only in a predetermined relative position and that the two link bodies are pivotable in relation to each other.
Abstract: A compass saw comprises a drive unit for a saw blade holder carrying a saw blade, and a base plate supporting the drive unit. The base plate has on its underside a glide shoe lined on a bottom face with a contact sole. The guide shoe is provided to guide the blade at the level of the base plate, more particularly close above the contact sole, laterally to an extract such as to prevent it from deviating from the desired course, as well from canting and coming into off position.
May 28, 1985
Date of Patent:
May 19, 1987
Peter Maier, Gernot Hansel, Rolf Henzler, Hartmut Walter, Gunter Arnold
Abstract: A device for a motorized saw wherein the saw guide bar consists of a reciprocating toothed saw blade (13) and a relative to this stationary support plate (12). One circular disc (14) is loosely laid into an elongated recess (15) in the support plate (12) such that it is movable relative to the support plate (12) as well as to the saw blade (13) and therefore the friction against the support plate is diminished.
Abstract: A disposable blade carriage for straight razors that have a holder member and a guard member pivotally mounted on each other. The blade carriage is removably mounted in a longitudinally extending slot in the holder member. The blade carriage includes a latching mechanism on one end that rigidly attaches the carriage to the holder member and a hook member that prevents it from falling off from the other end.
Abstract: A shaving razor utilizes a trailing blade aligned along the longitudinal axis of the razor's shaving head for trimming and at least one leading blade for primary shaving. The cutting edge of the leading blade is aligned diagonally to the cutting edge of the trailing blade and therefore slices through the hair or beard at a different angle of attack than does a conventional blade, thereby reducing drag and yielding a smoother shave.
Abstract: A punch having a gage attached to one jaw which has at least two mutually perpendicular lips for engagement with two mutually perpendicular edges of the jacket of a magnetic record diskette. The gage locates the opening which the punch will form in the jacket.