Electricity: electrical systems and devices – Miscellaneous
Patent
1981-07-15
1984-02-21
James, Andrew J.
Electricity: electrical systems and devices
Miscellaneous
429174, 429175, H01G 900, H01M 208
Patent
active
044333617
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a cover with electrically insulated current lead-throughs to close off cup-shaped or tube-shaped compartments of electric components, especially to close the compartments of condensers.
The invention relates in particular to a cover which consists of several layers which form a composite structure which are tightly interconnected with each other. In such a cover, an electricity-conducting lead-through disc having a lead-through element is connected with a ridged cover plate, which may be of metal or artificial material, in such a way that the lead-through element traverses an opening in the cover plate. A tightly insulated disc, or layer impermeable to gases and fluids and electrically insulated is inserted between the cover and the lead-through disc.
There has been made increasing use of lids or cover plates for locking tube-shaped or cup-shaped compartments of electric or electronic components, especially for locking the cup-compartments of electric condensers which consist of a metallic material, especially aluminum. Such covers have shown to have a high temperature consistency and at the same time a high shut-out effect against the permeation of gases and vapors.
If, despite these advantages, aluminum covers have but hesitatingly found their way into the market, the reason may be found in that such covers up to now could only imperfectly be provided with electrically insulating and permeation-proof current lead-through passages.
Cover plates of this type have, for instance, been made known by the publication of Federal Republic of Germany publication DE No. 27 38 747 A1, DE No. 26 09 061 A1 and DE No. 25 17 417 A1. A disadvantage in all these known current lead-through passages is the insufficient sealing between the electrical passage element and the cover plate forming the cover itself against the permeation of gases and fluid vapors. The creeping characteristics of fluids, especially as used in condensers, and the permeation characteristics of gases, especially those for oxygen which is very damaging to condensers, are such that in known locking covers, the path is so short that especially when operating at higher temperatures, an active substance exchange between the inside of the closed condenser and its environment may occur due to permeation and low sealing capacity of the sealing of the lead-through elements.
The invention has an object to provide a locking cover for locking the compartments of cup-shaped or tube-shaped electrical components, especially for locking condenser compartments, which, however even at high temperatures, especially temperatures over 120.degree. C., will produce a long-term stable and reliable locking cover with substantially improved impermeability and sealing of gases and vapors.
SUMMARY OF THE INVENTION
To attain this objective, the invention provides for a locking cover of the above-described type, which is characterized by the following three features: may either be formed with the disc or formed onto the disc with such lead-through disc having at least the same diameter or a slightly smaller diameter than the cover plate itself; plate and the lead-through disc in a form such that it preferably extends around the outer edge of the lead-through disc on the oppositely lying upper side which, when the tube compartment or cup compartment is closed faces the outside, preferably forming a ring around the lead-through disc; and time mechanically rigidly connected with the lead-through disc.
The mechanical connection of the three components, e.g. the lead-through disc, the electrically insulated intermediate layer or intermediate disc and the cover plate itself (in relation to the compartment inside) may be accomplished by glueing, welding, clamping, locking engagement or bolting down in a known manner. If, for instance, the cover plate consists of artificial material, such plate of artificial material is preferably supported on the electric lead-through of the lead-through disc, for instance through bolting, by clip
REFERENCES:
patent: 2039154 (1936-04-01), Emmens et al.
patent: 2758149 (1956-08-01), Brennan
patent: 3061660 (1962-10-01), Schenk, Jr.
patent: 3548264 (1970-12-01), Carino et al.
patent: 3686536 (1972-08-01), Pearce et al.
patent: 4074417 (1978-02-01), Pearce et al.
patent: 4122243 (1978-10-01), Tsuchida et al.
patent: 4208699 (1980-06-01), Philpott et al.
patent: 4230754 (1980-10-01), Maher et al.
Klaschka Rudolf
Wolf Franz-Josef
James Andrew J.
Nehrbass Seth
LandOfFree
Cover with electrically insulated current conduction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cover with electrically insulated current conduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cover with electrically insulated current conduction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1038838