Induction disc type relay

Claim 2

In an induction disc type relay including an induction disc and means for applying a rotational torque to said disc, the improvement wherein said means for applying a rotational torque to said disc comprises: first means, responsive to an input signal, for supplying a first operating torque to rotate said disc in a first direction; and second means, responsive to said input signal to which said first means is responsive, for supplying a second operating torque to rotate said disc in a direction opposite to said first direction, wherein said first and second means each comprises a shading coil magnetic pole structure having differently spaced air gaps mounted on the single core piece, whereby, the resultant torque applied to rotate said disc results from the application of the same input signal to said first and second means, so that a desired inverse time lag characteristic can be accurately obtained.

Claim 3

An induction disc type relay according to claim 1, wherein said disc is mounted on a shaft having a bias spring provided therefor to impart a bias torque to said disc in one of said directions.

Claim 4

An induction disc type relay according to claim 2, including a singular input coil mounted on said core structure to which said input signal is applied.

Claim 5

In an induction disc type relay including an induction disc and means for applying a rotational torque to said disc, the improvement wherein said means for applying a rotational torque to said disc comprises: first means, responsive to an input signal, for supplying a first operating torque to rotate said disc in a first direction; and second means, responsive to said input signal to which said first means is responsive, for supplying a second operating torque to rotate said disc in a direction opposite to said first direction, wherein said first and second means each comprises a shading coil magnetic pole structure having differently spaced air gaps mounted on separate core pieces and including a pair of input coils mounted on said pieces and having the inputs thereof each receiving said input signal so that said input signal will be applied to each of said core pieces and, thereby, to said shading coil magnetic pole structure, whereby, the resultant torque applied to rotate said disc results from the application of the same input signal to said first and second means, so that a desired inverse time lag characteristic can be accurately obtained.

Claim 6

In an induction disc type relay including an induction disc and means for applying a rotational torque to said disc, the improvement wherein said means for applying a rotational torque to said disc comprises: first means, responsive to an input signal, for supplying a first operating torque to rotate said disc in a first direction; and second means, responsive to said input signal to which said first means is responsive, for supplying a second operating torque to rotate said disc in a direction opposite to said first direction, wherein said first and second means each comprises a shading coil magnetic pole structure having differently spaced air gaps mounted on separate core pieces and including a pair of input coils mounted on said pieces and having the inputs thereof each receiving said input signal so that said input signal will be applied to each of said core pieces and, thereby, to said shading coil magnetic pole structure, whereby, the resultant torque applied to rotate said disc results from the application of the same input signal to said first and second means, so that a desired inverse time lag characteristic can be accurately obtained.