Patent ID: 6272001
Filing Date: 2001-08-07
Classification: H03K

Abstract:
An emergency stop switch comprising: a first core member secured to a fixed body and wound with a primary winding and a secondary winding, a second core member provided so as to be movable towards and away from said first core member, and moving means for moving said second core member, said emergency stop switch characterized in that, when said second core member is made to approach said first core member by said moving means, a transformer is formed by said first and second core members so that AC signal from an AC signal generating source connected to said primary winding side is transmitted to said secondary winding side, and when said second core member is separated from said first core member by said moving means, said AC signal is not transmitted to said secondary winding side; wherein said moving means comprises; a push button with one end fixed to said second core member, and a resilient member for resiliently urging said second core member in an opposite direction to the push operation direction of said push button, and at normal times, said second core member is made to approach said first core member by the resilient urging force of said resilient member to form a transformer, and when the push button is pushed, said second core member separates from said first core member against the resilient urging force of said resilient member.