Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Work or object holding type
Patent
1982-11-08
1984-09-11
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Work or object holding type
335306, 308 10, H01F 720
Patent
active
044713312
ABSTRACT:
Two stacks of toroidal magnets (33, 34, 35 and 37, 38, 39) are coaxially mounted and polarized so that the first stack (33, 34, 35) is centered and spacially supported within the second stack (37, 38, 39). The second stack is mounted in a stationary base (26) while the first stack is mounted in a support (17) on which may be mounted clamps (16) for holding a workpiece, such as a printed circuit board. The board may be freely moved in a horizontal plane to position portions thereof relative to a work tool (18, 21). Any detrimental work forces imparted by operation of the work tool are dissipated by a tilting of the work support against the magnetic fields set up by the coaxial stacks of magnets.
REFERENCES:
patent: 3326610 (1967-06-01), Baermann
patent: 3434084 (1969-03-01), Milligan
patent: 4340260 (1982-07-01), Forster et al.
AT&T - Technologies, Inc.
Harris George
Miller R. P.
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