US1831882A - High potential condenser - Google Patents

Description

HIGH POTENTIAL CONDENSER Filed DSC. 4. 1928 Patented Nov. 1 7,v 1931 UNITED STATES JOHN ALBERT PROCTOR, 0F LEXINGTON, MASSACHSETTS, ASSIGNOR,

PATENT oFF ICE SIGNMENTS, 'TO GENERAL ELECTRIC COMPANY, A CORPORATION 0F NEW YORK HIGH CONDENSER Application mea December 4, i928. serial No. 323,592.

The subject of the present invention is a new and improved type of `air-dielectric condenser for connecting signalling apparatus to a high tension power line, and a condenser especiallyvaluable where a high tensionpower line is utilized for the transmission of signals as well asthe transmission of power. Such a power transmission line may act as just described by impressingthereon a lhigh frequency, low tension carrier current and inodulating this carriencurrent'with the desired signals. y

An object of the invention is to provlde a condenser of the kind indicated, which may be designed to have 'a capacity capable of transmitting the high frequency carrier current'to the power line, while preventing passage of the low frequency, high tension. power current and thereby protecting the signalling circuit and apparatus andthe operators thereof from said power current; and which condenser, at the same time, may be constructed in such manner as to have abulk distributed chiefly over an extended area in a substantially vertical plane, to incorporate exposed armature surfaces for various useful purposes.

Anotherobject is to provide a condenser preferably of the kind vlast-described, of a tions where such exposed armature surfacesV m'av serve theirv intended purposes.

Still another object is to provide an airvdielectric condenser carrying armature surfaces exposed as more or less pl'ane surfaces, and at the same time incorporating'improved means for securing the condenserv parts in proper relation while insulating the conden-l ser from the ground botli for the low frequencyand the high frequency currents.

A condenser of the out-door type, for satis` factorily operating to couple a high tension power-"line with a signalling apparatus in a manner to protect the latter as required, may

very simple and comparatively inexpensivev be of considerable size. Such a condenser at the same time a condenser incorporating, among other novel advantages, armature surfaces so conspicuousto the view as to warrant their utility as message-carriers over a considerable visual range. Thus, these surfaces, while functioning as workin arts of the condenser, may be inscribed wit warnnY Mnsnn Asif cient condenser for the purpose intended, and

ings not to touch or come near the charged parts of the condenser, and/or general advertising-matter carried, say, by bill-board sheets posted on said armature surfaces functioning asbulletin-boards or the like.

Incarrying out the invention, there may desirably be employed a plurality of air-separated substantially vertical steel or other suitable metal sheets or .walls constituting the armatures, and so disposed that one or more ofthese sheets may act as bill-boards or surfaces for carrying messages, as above, and also as natural and quick rain-water shedders A construction now preferred, and the one illustrated, by way of'example, in the accompanying drawings, includes an armature, to be connected to the 'power line, which is in the form of a slenderized inverted U straddling a plane wall or plate armature to be connected to the signalling circuit; thereby to provide a condenser having three substantially flat plates, two of which are thev legs `of the inverted U. These two outer plates, charged with the high tension current, will be the more exposed ones; an-apparent 4disadvantage more than o'set by the advantage of having them available as warningcarriers and bill-boards, as above described.A

The inventionaconsists in features of construction and combinations of parts as hereinafter set forth and claimed.

The following description of the embodiment at present preferred willl make the in-v vention more clearly understood; but such description is to be taken in an illustrative and not in a delimiting sense, except as featuresof the invention are particularly specilar parts throughout the several views of the drawing.

Referring to Figs. 1 and 2, the 'armature 4 for connection in any suitable way to the signalling circuit may be a rectangular metal plate arranged in a vertical plane andrather considerably elongated horizontally.

The armature for connection in any suitable way to the power line may also be a rectangular metal plate, 5, bent into an inverted U-shape, to include, in effect, two armature plates 5 and 5 (parallel to each other and to the armature 4 interposed therebetween, and equidistant from said armature 4), and an intermediate curved portion 5A forming Ithe bowl of the inverted U defined by armature 5 in cross-section. y

This curved portion 5A of armature' may also have a capacity action with armature 4, due to the cylindrical structure 4A at the top of armature 4 which is desirably present; and which structure 4A is here shown as the upper marginal portion of plate 4 rolled over circularly on itself` along the length of plate 4.

This cylindrical structure 4A may also be l useful to further stifl'en the armature 4 to its flat-plate condition,as may also a similar cylindrical structure 4B which may be formed at the bottom of armature 4.

In the construction illustrated, these structures 4A and v4B at top and bottom of armature 4 are additionally useful in facilitating the incorporation of simple yet rugged hanger means at opposite ends ofthe armature 4. l

Such hanger means, -at each end of the armature v4, may include a metal brace and guy strap 6, bent from say, steel bar-stock to an inverted V form, ywith an eye-enlargement 6A at the apex of the V-;.and a cradle-strap 7, bent from similar bar-stock to have a halfround depression 7A midway of its ends.

`When these parts are set up as shown in the drawings, the cylindrical structure4A of armature 4, at a point near each end of the armature, is embraced by the eye-enlargement 6A of a strap 6, and the cylindrical structure 4B of armature 4, ata point near each end of thel armature, is seated well Within the depression 7A in a strap 7.

The straps 6 and 7, where coupled to armature 4, as just described, are desir-ably welded thereto, to which end the armature 4 may-advantageously be made of sheet steel.

The positioning of the straps 6 and 7 relal' tive to armature 4 is desirably such 'as to lo` cate a pair of straps 6'and 7 at each' end of the armature, with a strap 7 vertically below a strap 6, so that the vterminal portions of both straps, as indicated at F (where strap 6 is shown as having suitably offset foot-portions to extend horizontally with strap 7), may bebrought together to align four pairs of openings (not shown), one in each of the two trap-ends at the four F locations. These aligned pairs of openings may receive the Shanks of bolts 8 or the like, each suitably secured in one of four insulators 9-arranged at the four basal corners of the condenser, where blocks 10, of concrete or the like, may be provided tocarry said insulators.

Between Vthese blocks 10 may be other and larger blocks 11 of concrete or the like, as illustrated. These blocks 11 may be elongated transversely of the condenser, so that each maysupport a pair of insulators 12, near the opposite ends of armature 5, and on which insulators- 12 said armature 5 may be mounted.

The securing means for the armature 5 may comprise securing elements solely for the lower portions of said armature. This is so, because the U-shape of the armature 5 may be relied on to act as a self-stiiener for the same, to insure that when such securing elements are employed the armatures 4 and 5 will be permanently rigidified in their predetermined spacings to maintain constant the air-dielectric capacity as originally calculated. Said securing means for the lower marginal portions of the armature 5 may in part be provided, and made rigidifyingly functionin by curling such marginal portions circu arly outwardly to form troughs as indicated at 5B. This is a preferred construction, as a rigidifying means particularly, because then the sheet metal of which ar- 4mature 5 is made may be fairly thin as compared to its superficial area: With an insulator 12 each underlying a trough 5B of armature 5 near an opposite end of such trough, as illustra-ted, a bolt 14 or the like may be passed down through a washer 1-'5 (having a convexlyl rounded bottom shaped to conform nicely to the concavity of the trough interior) and through a suitable aperture (not shown) in said trough, and thence through a flat-bottomed washer 16 (underlying thc 'trough 5B and having a concavely rounded top shaped to conform nicely to the convexity of the trough exterior)and finally suitably secured inside each of the insulators 12. to anchor the armature 5 in place as intended.

Referring to Fig. 3. where the parts shown correspond to the like numbered parts in Figs. 1 and 2, this illustrates a simple .and inexpensive met-hod of further rigidifying the inner armature 4, as by welding a thinwalled tube or pipe 17, which may be co-' extensive in length with thc armature 4, in-

llO

side the upper marginal rolled-over portion 4A thereof. -A similar pipe (not shown) may be similarly as-sociated with the lower marginal rolled-over portion 4B of said armature 4.

A comparativelylarge radius of curvature for the rolls or curled portions 4A and 4B or armature 4, v and 5A and 5B of armature 5,

is preferably incorporated to combat concena c tmdenser for subjection to 33 to 44 k. v.,

.trations 'ofdelectrostatic stresses and minimize if not avoid undesirable corona effects.

The are-as, overlappi-ngs and -spacingsof the armatures 4 and 5 will be governed by the voltages to lwhich the condenser isl to be subjected, due regard being had to the air dielectric employed. As a specific example,

and having a capacity 'of .0013 m. f. d., should, with a three inch separation between armatures 4 and 5, have about 10() square feetof dielectric surface, -which could be obtained in the condenser illu-strated inthe drawing, by making the armature 5, as to that portion of it viewed in Fig. 1, approximately five feet high and ten feet long.

A condenser of the type exemplified by the specific embodiment shown in the accompanying drawings, is adapted to permit passage of a high frequency current to the high tension power line, while preventing the power current to 'be applied tothe carrier-currentimpressing line. Such new condenser, moreover, may be supported on an inexpensive foundation, and a round-level one where desired, and also on.- ow-cost yet dependableinsulators assuring proper protection againstl break-down due to grounds. The new condenser, further, may be characterized by a bulk, simply yet rigidly established, distributed chie y in a substantially vertical plane, for carrying, conspicuously, ,warning or other useful messages or indicia. It will readily b e seen that such a condenser naturally provides a pair of oppositely facing billboardor bulletin surfaces, to wit, the outer faces of plate portions 5 and 5 of armature 5, adapted to carry warningsand announcementsi'capable of being observed and taken lcognizance of, 4at considerable distances.

Both armatures 4 and 5, because entirely or in the main `characterized by a bulk dis-I tributed Iin substantially a vertical plane, act as natural water shedders; while, if the in verted U-shape for armature 5 be retained,

there is an additional protection for the inner surfaces of plate portions 5 and 5 of said armature, aswell also as additonal protection for the opposite faces of armature 4. Consequently, the invention provides a 'novel type of condenser `well-adapted for out-door use, particularl locations near popular travel-lanes; an a' condenser at the same timecalculated to'attain all the other objects and incorporate all the other advantages already pointed out.

`The dimensional and other qualitative data set forth hereinabove in regard to the particular condenser illustrated in the drawings, it will be understood, are not to be taken as in any way delimiting the` invention; and

the same is to be understood as to various structural changes possible, and falling withyin the spirit of the invention as defined by the claims following.

I claim:

l. A high-voltage condenser for the purpose described, comprising armatures one of which is an outer sheet structure and another of which is an inner sheet structure, with an air dielectric between, the outer sheet structure having an arched central portion roofing an upper edge portion of the inner sheet structure and also arched llower portions.

forming longitudinal troughs on opposite sides of the condenser.

2'. A high-voltage condenser for the pur- ,pose described, comprising an inner armature including a .substantially vertical sheetstructure, and an outer armature including the main an upright substantially plane wallVY having enlargements vnear its top and bot-- tom, hanger means for positioningsald armature upright, said hanger means including a cradle strap shaped to receive and seat said bottom enlargement and also including a bracing stray shaped to receive and seat said top enlargement. i

5. In a high-voltage condenserfor the purpose described, an armature comprising in the main an upright substantially plane wall yhaving enlargements at its top and bottom, i.

and means for mounting said armature including a plurality of straps for engaging j and holding said enlargements one above the other as predetermined, one of said straps being V-shaped and engaging one of said enlargements near the apex of the V.

6. An air-dielectric high-voltage condenser for the pur,A ose described, Vcomprising armatures onel'o avhichis an armature of ,sub-

stantiallyrinverted U-sliape having itsbulk principally distributed through .a substantially vertical plane. said armature,having-g.,

outwardly bent lower portions on opposite sides thereof, an insulated mounting strucpre-determined angle to the horizontal, said hanger means including four shaped straps and four insulation-protected anchorages for Vthe eight terminal portions of said four straps; 8. In a condenser for the purpose described, the combination of a first armature including in the main a substantially7 vertical wall and having a curvilinearenlargement at its upper portion and a curvilinear enlargement at its lower portion; a second armature ssp,

having a curvilinear central portion roofing over the curvilinear upper portion of the first armature; skirt portions depending from said central portion and constituting walls lying substantially parallel with and alongside of the" wall of the first armature, and curvilinear terminal portions at the bottoms of said skirt portions; all said curvilinear .portions constituting stifening agents for said walls; and mounting and insulating means for the armatures engaging a plurality of said curvilinear portions of both armatures and coacting with said curvilinear portions to maintain said armatures in proper assembly.

9. In an air-dielectric condenser for the purpose described, the combination of a first armature including in the main a substantially vertical wall and having a curvilinear enlargement at its upper portionand a curvilinear enlargement at its lower portion; a second armature having a curvilinear central portion roofing over the curvilinear upper portion of the lirst armature, skirt portions depending from said central 'portion and constituting walls lying substantially parallel with and alongside of the wall of the first armature, and curvilinear terminal portions atthe bottoms of said skirt portions; said curvilinear portions in partv forming stiffening agents for said Walls, and in part forming means for assembling and anchoring the working parts of the condenser in predeterlmined relation; such assembling and anchoring means including two groups of insulators, means for conformingly seizing the curvilinear portions of one of said armatures. and mounting that armature atop one of said groups, and means including a strap-structurel of substantially inverted-V shape and a coacting underlying cradling strap-structure, for conformingly seizing the curvilinear portions ot the other armature and mounting that armature on the other of said groups.

10.A condenser comprising electrically signature.

' JOHN ALBERT PROCTOR.

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