Time delay switch

Abstract

In a time delay switch comprising: a delay action means comprising an oil dash pot (9) containing a piston (21) of magnetic-flux-responsive substance disposed in an oil-filled cylinder, a magnetic circuit containing a permanent magnet (18) mechanically linked to a handle (8) and magnetically coupled to said piston (21), at least a fixed magnetic yoke (14, 15), at least a moving magnetic yoke (16, 17) and an armature (20) movable in reaction to a change of magnetic flux due to movement of the piston (21), at least a moving contact plate (13) linked to said armature (20) and at least a fixed contact plate (11) disposed to touch said moving contact plate (13), the improvement is that a case (1) which contains the abovementioned components is made of an insulating resin and has a first part (101) of larger depth and a second part (102) of smaller depth, said first part and said second part being each other integrally connected, said first part containing said oil dash pot fixed to said bottom part of said case (1), said handle (8) cradlably fulcrumed on an upper part of said first part (101), and said moving contact plate (13) and said fixed contact plate (11) of said time delay switch, said second part (102) containing terminals (24,24c,25,25c) to which electric wires are to be connected at the bottom part of the smaller depth part of the case.

Dependencies are inferred from the claim text.