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AssigneeFrankl & Kirchner GmbH & Co. KG, Fabrik fur Elektromotoren u. elektrische Apparate
InventorsHerbert Palloch, Hans Erndt
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An arrangement for securing a housing cover, especially useful for securing a cover for a switch box having electrical switching devices therein includes at least one screwable element which can be threaded to the housing and which is secured undetachably on the cover by a stop on its shaft. The shaft extends through the cover, each of the screwable elements extending through a bottom of an indentation in a surface of the cover. A pre-stressed compression spring is disposed in the indentation between a shoulder of the screwable element and the base of the indentation. Each screwable element comprises a shaft nut, the shaft nut having a shaft with an indentation in its pressure-receiving face. The shaft engages with a threaded pin attached to the housing and rests against a structural part which is supported against a support attached to the housing. The screwable element is centered by a centering body positioned directly ahead of the support on the threaded pin.
An improved arrangement for securing a cover to a housing, especially a cover for a box housing electrical devices, at least one screwable element, said cover being formed with an indentation for each said screwable element, each said indentation comprising a bottom wall formed with an opening to receive a said screwable element, compression spring means disposed in said indentation between a shoulder formed on said screwable element and said indentation bottom wall for normally urging said screwable element outwardly of said indentation and away from said housing, and said screwable element comprising stop means to limit the motion of said screwable element out of said indentation and to hold said screwable element captive in said indentation, the improvement comprising a threaded pin having a first portion secured to said housing and a second portion adapted to cooperate with said cover, said screwable element comprising a pressure face formed at its free end at the inside of said cover, a structural part secured to said housing, said pressure face of said screwable element being adapted to bear against said structural part in the secured together condition of said cover on said housing, said threaded pin comprising a third portion comprising a centering body which mates with a suitably formed opening in said structural part in the correctly assembled together conditions of said structural part in said housing and of said cover on said housing, and said screwable element comprising a shaft nut for engaging said threaded pin second portion against the force of said compression spring means for removably securing said cover on said housing.
Dependencies are inferred from the claim text.