Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1989-12-15
1991-01-15
Stephan, Steven L.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
335296, 361139, 134 1, H01F 706, H01F 720, B08B 702, B06B 104
Patent
active
049857355
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates generally to devices for cleaning and preventing contamination of surfaces through vibration, and more specifically to an apparatus for cleaning a surface from substances adhering thereto.
PRIOR ART
There is known an apparatus for cleaning a surface from impurities (cf., SU, A, 875, 198), comprising a flat electromagnet coil, a paramagnetic plate, a rod and a pusher for transmitting pulses from the electromagnet coil to the surface being cleaned, and an additional paramagnnetic plate disposed at the opposite face of the electromagnet coil. The first paramagnetic plate is connected to the surface being cleaned through the pusher, whereas the additional paramagnetic plate is connected to the surface being cleaned through the rod.
However, this apparatus fails to produce a sufficiently strong pulse force, because the electromagnet coil has the form of a single-layer spiral with a random number of turns. In addition, with the flat arrangement of the electromagnet coil the depth of penetration of the magnetic field into the metal of the electromagnet coil can substantially exceed the height of the current-conducting bar of the spiral, which affects electromagnetic coupling of the coil with the paramagnetic plates. This apparatus therefore provides an insufficiently strong impulse of force applied to the surface being cleaned to result in low surface cleaning efficiency.
There is also known an apparatus for cleaning a surface from substances adhering thereto (cf., SU, 918, 220) comprising an electromagnet coil, a source of pulse current connected to the electromagnet coil, a paramagnetic plate fabricated from a material of high electrical conductivity positioned between an end face of the electromagnet coil and the surface being cleaned, a spring-biased rod, and a platen. The apparatus is provided with an additional paramagnetic plate fabricated from a material of high electrical conductivity, arranged at the opposite side of the electromagnet coil, resiliently linked therewith and with the main paramagnetic plate through the spring-biased rod, and a shell connected to the additional paramagnetic plate by way of a transmission means and disposed coaxially with the electromagnet coil. The paramagnetic plate is secured at the bottom part of the shell having the transmission means mounted at its side surface. The shell is connected to the platen through resilient elements, and is arranged so as to move between the electromagnet coil and shell. This apparatus has low efficiency of converting the energy of the source of pulse current into mechanical energy for cleaning the surface due to that the electromagnet coil is single-layer and has a random number of coil turns, whereby the impulse of force applied to the surface being cleaned lacks the required strength. This in turn makes cleaning of surfaces from substances adhered thereto less efficient. In view of the aforedescribed, the prior art apparatus has a rather low surface cleaning efficiency.
SUMMARY OF THE INVENTION
The invention aims at providing an apparatus for cleaning a surface from substances tending to adhere thereto having such a structural arrangement as to enable, through increasing the impulse of force applied to the surface being cleaned, to attain a more efficient conversion of the energy generated by a source of pulse current to mechanical energy used for cleaning the surface, and thereby make the surface cleaning more efficient.
The aims of the invention are attained by that in an apparatus for cleaning a surface from substances adhered thereto comprising an electromagnet coil, a source of pulse current connected to the electromagnet coil, a paramagnetic plate fabricated from a highly electroconductive material arranged between the surface being cleaned and end face of the electromagnet coil, according to the invention, the electromagnet coil is multilayer, the number n of layers ranging from two to five, each layer having the form of a helical current conducting bar of rectangular cross sectio
REFERENCES:
patent: 4838287 (1989-06-01), Matsui et al.
Odnoral Alexandr P.
Tjutkin Vladimir A.
Tolmachev Nikolai S.
LaBalle C.
Stephan Steven L.
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