MAGNETICALLY OPERATED SEALED END SWITCH Russian patent published in 2007 - IPC H01H36/00 

FIELD: electric engineering, possible use as end sensor reacting to movement of constant magnet.

SUBSTANCE: two variants of switch design are claimed. Switch contains cylindrical rod constant magnet and plastic body. In the body, magnetically operating sealed switch is positioned. Single output of magnetically operated sealed switch is bent towards detachable pair of contact-parts for 180° in form of U-shaped bend, lying inside the plane which passes through outputs of detachable pair of magnetically operated sealed switch, short part of which, enveloping the tank of magnetically operated sealed switch, by means of rectangular polyethylene bushing pinned on the tank and outputs of detachable pair of contact-parts of magnetically operated sealed switch, is oriented towards the narrow, long side of the body. Area of activation of magnetically operated sealed switch relatively to the middle of the constant magnet is a hemisphere with radius R, determined from formula where D_m - magnet diameter; l_m - magnet length; l_mk - distance from the side mark to closed end of the body; l₁ - distance from internal surface of closed end of the body to the end of short part of bend; F_i (A) - magneto-motive activation force of magnetically operated sealed switch, being within range 60A≤ F_i (A)≤85 A for ratios limited by inequalities for constant magnets with dimensions with distribution of inductance on the end of magnet ranging from 0,2 to 0,3 T.

EFFECT: increased reliability.

2 cl, 8 dwg