ROTARY REED SWITCH Russian patent published in 1998 - IPC

FIELD: electrical engineering; electric-drive and other automatic-control systems. SUBSTANCE: reed contacts are fixed in position in switch over generating circumference of cylinder along its axis with U-shaped magnetic shunts placed between them. Movable permanent bar magnets of number twice as small as that of reed contacts are installed along reed contacts on rotary shaft and have locks holding them in position; size of mentioned permanent magnets along direction of their travel is determined as D > 2RtgA ,, where D is size of permanent magnets in direction of their travel; R is radius of cylinder generating circumference over which reed contacts are installed; A is angle of process tolerance for holding the magnet in position by lock. Device may be provided with permanent magnet locking device. EFFECT: improved reliability and enlarged functional capabilities. 3 cl, 3 dwg