Abstract The present invention relates to a device in a microtome for damping of vibrations in the specimen arm of the microtome. In the damping device according to the present invention the effect of eddy currents is utilized, which will arise in a plate of a material having low resistivity, when said plate is intersected by a magnetic field. According to the invention an axis consisting of a non-magnetic material and rigidly connected to the specimen arm of the microtome is provided with a flange, consisting of a material having low resistivity and two Umagnetized toroid cores, embracing the axis and resiliently suspended in relation to the axis, said U-magnetized toriod cores being affixed relative to each other in order that a constant air gap is at hand between said cores, said U-magnetized toroid cores being arranged in such a way that said flange is surrounded by said air gap.
Device in a microtome for damping of vibrations of the specimen arm of the microtome, characterized in that it comprises an axis, consisting of a non-magnetic material and rigidly connected to the specimen arm, said axis being provided with a flange, consisting of a material having low resistivity, and two U-magnetized toroid cores, embracing the axis and resiliently suspended in relation to the axis, said U-magnetized toroid cores being affixed relative to each other in order that a constant air gap is at hand between said cores through which air gap the toroid cores are forcing a magnetic field, said U-magnetized toroid cores being arranged in such a way that said flange is surrounded by said air gap.
Claim 2
Dependent Claim
118 words
Device in a microtome for damping of vibrations of the specimen arm of the microtome, characterized in that it comprises an axis, consisting of a non-magnetic material and rigidly connected to the specimen arm, said axis being provided with a flange, consisting of a material having low resistivity, and two U-magnetized toroid cores, embracing the axis and resiliently suspended in relation to the axis, said U-magnetized toroid cores being affixed relative to each other in order that a constant air gap is at hand between said cores through which air gap the toroid cores are forcing a magnetic field, said U-magnetized toroid cores being arranged in such a way that said flange is surrounded by said air gap.
Claim 3
Dependent Claim
64 words
Device according to claim 1, characterized in that said axis is provided with three flanges, consisting of a material having low resistivity, said U-magnetized toroid cores being arranged in that way that the mid flange is enclosed by said air gap and that the outer flanges are situated outside the U-magnetized toroid cores within the stray flux from the said U-magnetized toroid cores, respectively.