Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1989-04-19
1990-03-13
Thompson, Greogry D.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
220 33, 361362, H02B 108
Patent
active
049087339
ABSTRACT:
A switch box for wall attachment with a box-like cabinet body having a rear wall and four side walls, the open side of which body can be closed by a cabinet cover or a cabinet door. Using thin starting materials for the cabinet body, an increase of stability, in addition to the possibility of further attachment locations, can be attained by attaching a mounting angle in each of four corner areas on the internal side of the rear wall. The legs of the mounting angle, provided with threaded mounts, are positioned in a plane parallel to the rear wall and spaced at a distance therefrom. At least one external longitudinal side of a leg is provided with a recess for fixing a support strip which is firmly screwed in the area of the open side of the cabinet body. At least one threaded mount of every mounting angle is accessible by a boring in the rear wall of the cabinet body.
REFERENCES:
patent: 640482 (1900-01-01), Murphy
patent: 929812 (1909-08-01), Adam
patent: 3564112 (1971-02-01), Algotsson et al.
Debus Jurgen
Zachrei Jurgen
Pauley Douglas H.
Rittal--Werk Rudolf Loh GmbH & Co. KG
Speckman Thomas W.
Thompson Greogry D.
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