Core for dynamoelectric machines

Claim 1

A CORE FOR A DYNAMOELECTRIC MACHINE COMPRISING: A PLURALITY OF SUBSTANTIALLY TRAPEOZIODAL SHAPED LAMINATIONS HAVING A SLOTS AT THEIR INNER END, SAID LAMINATIONS BEING COMBINED TO FORM ANNULAR LAMINATION RINGS, SAID LAMINATION RINGS BEING ALIGNED AND STACKED, SECONDARY LAMINATIONS OF SUBSTANTIALLY TRAPEZOIDAL SHAPE HAVING A RADIAL LENGTH LESS THAN THE DISTANCE BETWEEN THE OUTER EDGE AND BOTTOM OF SAID SLOTS IN SAID PRIMARY LAMINATIONS, SAID SECONDARY LAMINATIONS BEING COMBINED TO FORM ANNULAR LAMINATION RINGS AND BING INTERSPERED WITH SAID PRIMARY LAMINATION RINGS, TERITARY LAMINATIONS OF SUBSTANTIALLY TRAPEXOIDAL SHAPE HAVING A RADIAL LENGTH LESS THAN THE RADIAL LENGTH OF SAID SECONDARY LAMINATIONS, SAID TERTIARY LAMINATIONS BEING COMBINED TO FORM ANNUALAR LAMINATION RINGS INTERSPERSED WITH THE OTHER SAID LAMINATION RINGS, SAID LAMINATIONS BEING CLAMPED TOGETHER TO FORM A CORE FOR A DYNAMEOLECTRIC MACHINE HAVING A SUBSTANTIALLY UNIFORM OVERALL LENGTH.