A magnet chuck has a piston assembly including a tube shaped permanent magnet and a core yoke able to move on the interior of a cylinder tube. The permanent magnet is provided on the outer periphery of the core yoke, is magnetized in the radial direction, and a magnetic sensor is attached to the side surface of the cylinder tube.

A magnetic clamping device is provided with a magnetic force generating mechanism at which a housing cover body comprising soft magnetic material is arranged centrally at a hollow housing portion, a nonmagnetic metal frame body comprising a nonmagnetic body is made to engage with the outside circumference thereof, a plurality of arcuate nonreversible permanent magnets are arranged in annular fashion within an annular magnet housing space at the back of this nonmagnetic metal frame body, a reversible permanent magnet and a magnetic polarity switching coil disposed peripherally with respect thereto are provided at the back of the housing cover body, and a base cover body that blocks a back opening of the hollow housing portion is provided, the magnetic clamping device being characterized in that the metal frame body is joined in integral fashion to the housing cover body and the baseplate.

Magnetic coupling devices are disclosed having magnetic field sensors. The magnetic coupling device may include degaussing coils wrapped about pole extension shoes of the magnetic coupling device.

A magnetic chuck has a piston assembly that contains a cylindrical permanent magnet and a core yoke. The piston assembly is movable inside a cylinder tube. The permanent magnet is provided on the outer periphery of the core yoke and is magnetized in the radial direction.

A magnetic base for an electric power tool, in particular for a magnetic core drilling machine. The magnetic base having a base body that has a contact surface for contacting a workpiece to be machined, at least one first permanent magnet and at least one second permanent magnet arranged in the base body, the at least one and second permanent magnet having magnetic forces that interact to form a resulting holding force. The at least one first permanent magnet and the at least one second permanent magnet are supported in the base body and rotatable around its own rotation axis between a first position, in which the resulting holding force of the magnetic base is maximized, and a second position, in which the resulting holding force of the magnetic base is minimized.

The invention relates to a magnetic holding device (10), in particular a clamping device, comprising a holding surface (9) and at least one first permanent magnet (11), characterized in that the holding device (10) comprises at least one second permanent magnet (12) which is rotatably mounted relative to the at least one first permanent magnet (11) about a rotational axis (3), whereby the pole direction (2) of the second permanent magnet (12) is rotatable relative to the pole direction (1) of the first permanent magnet (11).

The present disclosure relates to a magnetic apparatus for magnetically anchoring ferrous elements (P1), comprising a support structure (11) in which thickness (S) a plurality N of polar units (30A) is housed, said support structure (11) identifies a first and a second side (12, 13) at the opposite surfaces with the greatest extension, each of said plurality N of polar units (30A) comprising a coil (30) having a support (31) of predetermined profile and an electric conductive element (32) wound on said support, a first magnetic core (40) with a first coercive value, generating a first magnetic flow oriented in a first magnetic direction, a plurality of second magnetic cores (90A, 90B) having each its own coercive value, different from said first coercive value. A characteristic of the apparatus is that a first part (90A) of the plurality of second magnetic cores (90A, 90B) generates a second magnetic flow oriented in a second magnetic direction and a second part (90B) of the plurality of second magnetic cores (90A, 90B) generates a third magnetic flow oriented in a third magnetic direction, said third magnetic direction being parallel to said first magnetic direction and of different direction with respect to said second magnetic direction.

Tools for replacing knives in cutting machines. The tools include a clamping body having a base, bracket, clamp, and knife support tab(s). The bracket has a flange portion spaced apart from an upper surface of the base. The clamp is coupled to the base for translating in translation directions transverse to a longitudinal axis of the base. The clamp has a lift tab on the same side of the base as a rear surface thereof, and a handle is secured to the flange portion of the bracket and located on the same side of the base as the lift tab. The support tab projects from the front surface of the base, and the clamp is biased toward the support tab so that the clamp and support tab create a knife gripping mechanism for clamping an edge of a knife against the tab.

A magnet release device and of the type having a hinge barrel 11 or hinge post 13 affixed to the periphery of the magnet, using a rotating lever arm A 15, which is cam shaped with a leverage tool port 26.

The invention relates to a system for measuring vibration on a machine, with a carrier (14) for placing onto a measuring point (12) of the machine, a sensor (16) arranged on the carrier for detecting vibrations, an arrangement (16, 22, 28, 30) for detecting the electromechanical impedance of the sensor and also a monitoring device (22, 24, 26) for monitoring the current coupling of the carrier at the measuring point by means of evaluating the detected electromechanical impedance. The current coupling is in this case determined from the difference between the currently detected electromechanical impedance and the electromechanical impedance detected for a prescribed optimum coupling of the carrier to the measuring point.