Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Work or object holding type
Patent
1974-11-01
1976-03-02
Harris, G.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Work or object holding type
335303, 4010645, 40142A, H01F 720
Patent
active
039421473
ABSTRACT:
A display device comprising a display board having an outwardly facing surface, said board being of a ferromagnetic material, at least one substrate strip, said substrate strip having permanent magnetic properties comprising at least one pair of parallel spaced apart north and south magnetic poles extending in one direction thereof, at least one display unit having permanent magnetic properties comprising at least one pair of spaced apart north and south magnetic poles, said poles of said display unit being spaced apart by a distance equal to a multiple of the spacing of the north and south magnetic poles of the magnetic substrate strip. The device permits the display of indicia or characters without employing aligning means and also permits the placement of information in any desired direction.
REFERENCES:
patent: 3191106 (1965-06-01), Baermann
patent: 3228133 (1966-01-01), Baermann
patent: 3464134 (1969-09-01), Franklin
patent: 3518593 (1970-06-01), Hall
patent: 3681857 (1972-08-01), Yardley
Harris G.
Visual Planning Corporation
LandOfFree
Magnetic boards and components does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic boards and components, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic boards and components will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1281493