Mains transformer
First Claim
1. A transformer comprising a ferromagnetic core having windings thereon, a metal screening sheath surrounding the core, first and second supporting caps placed on the transformer from opposite directions and between which the screening sheath is clamped at a distance from the core, the edges of the screening sheath being fixed in grooves in the supporting caps, and wherein the grooves include lugs which extend transversely to the longitudinal direction of the grooves and into which the edges of the screening sheath penetrate thereby to locate the screening sheath in the grooves so as to be free from play.
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Accused Products
Abstract
A transformer (3) having a ferromagnetic core (5, 7) provided with windings and a metal screening device which comprises a screening sheath surrounding the core (5, 7). The screening device comprises supporting caps (25, 27) which are placed on the transformer from opposite directions and between which the screening sheath (13) is clamped at a distance from the core. The screening device may also serve as a holder for the transformer on a chassis of an apparatus.
14 Citations
12 Claims
- 1. A transformer comprising a ferromagnetic core having windings thereon, a metal screening sheath surrounding the core, first and second supporting caps placed on the transformer from opposite directions and between which the screening sheath is clamped at a distance from the core, the edges of the screening sheath being fixed in grooves in the supporting caps, and wherein the grooves include lugs which extend transversely to the longitudinal direction of the grooves and into which the edges of the screening sheath penetrate thereby to locate the screening sheath in the grooves so as to be free from play.
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5. A transformer comprising a ferromagnetic core having windings thereon, a metal screening sheath surrounding the core, first and second supporting caps placed on the transformer from opposite directions and between which the screening sheath is clamped at a distance from the core, the edges of the screening sheath being fixed in grooves in the supporting caps, and wherein the screening sheath includes continuous ducts extending between the clamped edges thereof.
- 7. A transformer comprising, a ferromagnetic core having windings thereon, first and second supporting caps each having a rigid collar and mounted about the core from opposite ends so that the collars surround the outer circumference of the core, each of said supporting caps having grooves therein in opposed relationship, and a metal screening sheath surrounding the core and collars and having opposed edges fixed in the grooves of the supporting caps so that the screening sheath is clamped between the supporting caps in spaced relation to the transformer core.
Specification