Abstract: A motor-driven saber saw includes a guide device releasably connectable with the saw housing (11) in a region of the neck (13) and including a guide element (21) for guiding the saber saw (10) over a workpiece, a connection device (22) for connecting the guide element (21) to the housing (11) and having at least one connection part extending along an axis (A) and connectable with the neck (13), with the guide element (21) being supported on the at least one connection part (24) for displacement along the axis (A), and with the guide device (20) further including at least one spring element (27) located between the at least one connection part (24) and the guide element (21).

Abstract: A hand-held reciprocating power saw (10) includes a reciprocation member (21) for reciprocatingly moving a working tool, a compensation mass (22), a motor-driven eccentric wheel (23) having a first eccentric (24) for reciprocatingly displacing the reciprocation member (21) and a second eccentric (25) for reciprocating the compensation mass (22) along an axis (A), with the outer surface (28) of the second eccentric (25) engaging in an opening (26) provided in the compensation mass (22) and defined by a circumferential wall (27), and an intermediate member (30) arranged between the circumferential wall (27) and the outer surface (28) of the second eccentric (25) at least in the contact regions (41, 42), between the circumferential wall (27) and the outer surface of second eccentric, with the intermediate member (30) having a first radial extension (R1) oriented parallel to the axis (A) and a second radial extension (R2) oriented perpendicular to the axis (A) and greater than the first radial extension (R1).

Abstract: A hand-operated jigsaw is disclosed. The reciprocating drive mechanism has a reciprocating body which can be put into a reciprocating motion along an axis via an eccentric of an eccentric wheel that can be set in motion by the motor. The eccentric wheel is arranged on a pivot bearing axis. The reciprocating drive mechanism has an additional mass with a mass center of gravity to minimize vibrations. The additional mass is arranged in a rotationally fixed manner with the eccentric wheel on the pivot bearing axis. An eccentric axis of the eccentric lies on a first radial of the pivot bearing axis, which is offset from a second radial in the operating direction of rotation of the eccentric wheel at an angle of between 190° and 270°, which second radial lies between the mass center of gravity of the additional mass and the pivot bearing axis.

Abstract: An electrical hand-held power tool includes a driving element (9; 9?) displaceable in the tool housing (8) along a drive axis (A) for driving a working tool (7, 7?), and at least one rigid electrical module located in the housing (8), and secured therein by at least one spring (4) that preloads the electrical module against the housing (8).

Abstract: A motor-driven reciprocating saw (10) includes a guide device (20) the guide member (21) of which has a base body (25) and a guide sole (27) provided on the base body (25) and having a first layer (31) formed of a rigid material with a low frictional adhesion and forming a bearing surface (28) for the workpiece, a third layer (33) likewise formed of a rigid material and formed integrally with the base body (25), and a second layer (32) formed of a vibration-damping material and located between the first and third layers (31 and 33).

Abstract: A motor-driven saber saw includes a guide device releasably connectable with the saw housing (11) in a region of the neck (13) and including a guide element (21) for guiding the saber saw (10) over a workpiece, a connection device (22) for connecting the guide element (21) to the housing (11) and having at least one connection part extending along an axis (A) and connectable with the neck (13), with the guide element (21) being supported on the at least one connection part (24) for displacement along the axis (A), and with the guide device (20) further including at least one spring element (27) located between the at least one connection part (24) and the guide element (21).

Abstract: The present invention relates to a reciprocating saw tool (10) having a motor drive (17) with a reciprocating driver (21) for a tool (15) and having a mass equilibrating body (22). In addition, a device (20) is provided, which serves to convert a rotary movement of the motor drive (17) into a reciprocating movement of the reciprocating driver (21) along a first movement axis (41) and an opposite reciprocating movement of the mass equilibrating body (22) along a second movement axis (42). For improving the sawing performance, the mass equilibrating body (22) is guided at an angle ? to the reciprocating driver (21) so that its movement axis (42) is constantly at an angle to the movement axis (41) of the reciprocating driver (21).

Abstract: A drive for a motor-driven hand-held tool includes a motor (17) and a gear mechanism (20) for converting a rotational movement of the motor (17) into a reciprocating movement of the reciprocating drive element (30) for a working tool, with the gear mechanism (20) having a transmission element (23) axially secured on a support (21) with a support member (26) and including a mass-balance member (31), a first eccentric take-off element (24) cooperating with the reciprocating drive element (30) and a second eccentric take-off element (25) cooperating with the mass-balance member (31) for imparting reciprocating movement thereto, and with the support member (26) forming a slide support surface for the mass-balance member (31).

Abstract: The present invention relates to a reciprocating saw tool (10) having a motor drive (17) with a reciprocating driver (21) for a tool (15) and having a mass equilibrating body (22). In addition, a device (20) is provided, which serves to convert a rotary movement of the motor drive (17) into a reciprocating movement of the reciprocating driver (21) along a first movement axis (41) and an opposite reciprocating movement of the mass equilibrating body (22) along a second movement axis (42). For improving the sawing performance, the mass equilibrating body (22) is guided at an angle ? to the reciprocating driver (21) so that its movement axis (42) is constantly at an angle to the movement axis (41) of the reciprocating driver (21).

Abstract: A drive for a motor-driven hand-held tool includes a motor (17) and a gear mechanism (20) for converting a rotational movement of the motor (17) into a reciprocating movement of the reciprocating drive element (30) for a working tool, with the gear mechanism (20) having a transmission element (23) axially secured on a support (21) with a support member (26) and including a mass-balance member (31), a first eccentric take-off element (24) cooperating with the reciprocating drive element (30) and a second eccentric take-off element (25) cooperating with the mass-balance member (31) for imparting reciprocating movement thereto, and with the support member (26) forming a slide support surface for the mass-balance member (31).

Abstract: A battery (4) driven circular saw includes a housing (1a) with a motor (3) for driving the circular saw blade (2). The circular saw blade (2) is fixed to a drive shaft (7) that runs transverse to the plane (E) of the circular saw blade (2), the drive shaft being functionally connected by means of a linkage (15) to the motor (3). In order to achieve the most compact construction possible of the circular saw, the axis of rotation (R) of the motor (3) runs parallel to the plane (E) of the circular saw blade (2).

Abstract: A tensioning device with a tensioning lever (1) and a detachable tensioning nut (2) has a pivotal tensioning cam (6), mounted elastically in the tensioning lever (1). The tensioning lever (1) has a seat (3) with a noncircular inside surface (4) for receiving the tensioning nut (2), which is mounted axially displaceably therein. The tensioning nut has an outside surface shaped to correspond to the noncircular surface of the seat (3). The tensioning nut (2) can be fixed removably in the tensioning lever (1) by a recess, which is disposed in the tensioning nut and into which the tensioning cam (6) can be engaged.

Abstract: A braking device for an electrical tool and including an actuation member (1), a braking drum (4) secured on the shaft of the electrical tool for joint rotation therewith, and a braking member (5) secured on the actuation member for joint displacement therewith, the actuation member being linearly displaceable upon a biasing force of a return spring acting thereon for pressing the braking member against a circumferential surface of the braking drum for braking the shaft and thereby the working tool.

Abstract: A driving device for driving a fastener (2) includes a centering mechanism (9) for centering and guiding the fastener (2). The centering mechanism includes centering elements (10, 26, 36, 37) that are tiltably or slidably connected to a mounting body (3) to be movable in directions tangential to the fastener. The centering elements (10) have contact surfaces (19) for contacting the fastener (2) that are each substantially parallel to the direction of motion of the respective centering element (10). In this manner, the centering elements (10) cannot be deflected radially away from the fastener, and any forces applied laterally outwardly by the fastener against the contact surfaces (19) are rigidly received and resisted by the centering elements (10) and the mounting body (3) in which they are held.

Abstract: An automatic screw gun which has a guide housing for the driving blade is equipped with a deflecting member that engages the leading end of the screw supply belt to deflect the leading end of the belt out of the path of the screw being driven, including the screw head or a washer below the screw head, whereby it is prevented that portions of the belt can be clamped between the surface of a work piece and the screw head or washer. A spring biases the deflector member into a rest position and the advancing belt brings the deflector member into a working position in which it holds the leading end of the belt out of the way.

Abstract: A hot cathode ionization pressure gauge with the following electrodes, arged at a distance from one another in the specified sequence along an axis:(a) a thermionic cathode filament which has a central active part and lateral support parts;(b) an essentially flat, diaphragm-like control electrode,(c) an essentially flat apertured acceleration electrode and(d) an essentially flat ion collector electrode,(e) a base plate on which the filament, the control electrode, the acceleration electrode and ion collector electrode are mounted,wherein the base plate consists of a ceramic material and has a plurality of through holes, and each of said control, acceleration and ion collector electrodes comprises a support member having essentially a shape of an inverted "U" with first and second legs, one of said legs of each electrode support member extending through a corresponding hole of said base plate and being fixed therein.

Abstract: A handheld screw driving gun (1) has a handle (17) extending essentially perpendicularly relative to the motor axis (3--3) and a screwing axis (6--6) which is off-set below the motor axis. The handle is connected approximately at the center of gravity of the screw gun (1). A screwing bit (5) is also off-set from the motor axis (3--3) and is rotatably supported in a guide head (7) between the motor axis (3--3) and the handle (17). In this arrangement, the index finger of an operator's hand on the handle approximately aligns with the axis of the screwing bit (5) so as to assure a screwing direction perpendicularly to a work surface without applying any tilting forces to a screw. The arrangement of the drive motor behind the handle and the screwing unit in front of the handle provides a balance that reduces fatigue while holding and operating the screw gun with one hand.