US1614113A - Electric condenser - Google Patents

Description

Jan. 11, 1927. 3

P. R. FORTIN ELECTRIC CONDENSER Filed May 13. 1925 9m HQ t n O .F t% o n m e W M u i a P H Patented Jan. 11, 1927.

UNITED STATES PATENT QFFICE.

PAUL R. FORTIN, OF SCHENECTADY. NEVI YORK, ASSIGNOBI TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW' YORK.

ELECTRIC CONDENSER.

Application filed May 13, 1925.

My invention relates to electric condensers, particularlv to high voltage power air condensers, and an object of my invention is to provide an improved condenser of this type which for a given capacity and Voltage shall he compact and shall not be subject to corona loss.

My invention will be better understood from the following description taken in connection with the accompanying drawing, and its scope will be pointed out in the appended claims.

In the drawing, 1. is a side elevation of a complete condenser involving my invention; Fig. 2 is a perspective view of a single element or plate of the condenser shown. in Fig. 1: Fig. 3 is a. detail of the plate shown in Fig. 2; Fig. 4 is a fragmentary view showing a condenser similar to that illustrated by 1 but having an adjustable upper plate; Fig. 5 is a top plan of the condenser shown in Fig. 4; 6 is a cross section of the adjustable plate of Fig. 4-,; and Fig. 7 is a detail of the adjusting; means.

Ref ring to the drawing, the supporting frame of the condenser comprises upper and lower frame members 1 and 2 connected by struts S to which the condenser plates are secured. Each ot the fixed plates 4 is shown circular in shape and comprises an external metallic ring 5 and two sheet metal di s 6 and 7. The outer surface 8 of the ring: 5 has a rounded contour which in cross section is preferably the arc ot a circle and on opposite sides ot the ring are annular grooves 9 and 10.

The two disks 6 and 7 are somewhat dished and have their edges 'elcd to lit the grooves 9 and 10. By virtue of their hein dished the disks may he sprung into the grooves in the ring 5 and will he iiri lv held therein by reason o their natural re liency. A dditional security may be obtained by rolling the edge of the ring over the edge of the diskv The plates thus formed are equally spaced at all points and each has an e..cctive thickness equal to the diameter of the rounded edge tori'ned by h The curvature of th edge and icing ct the plates. which may be ely small. are such that with the pocrences employed the be- )lfltQ function .suliistanti ll y like 1!: to the condenser the ac i tween the sphere break-down char .eristic oil a sphere gap Serial No. 30,072.

so that corona does not precede sparkover. By forming the grooves 9 and 10 well in from the rounded outer edge of the ring 5, any unavoidable slight roughness at the junction of the ring: and the disks is sufiiciently far from the. curved edge that it does not sta rt an arc-over this point.

Each condenser plate is shown provided with three equid t .nt radial supporting arms 12 which by means of J-bolts lfl are secured to the struts alternate plates havtheir arms secured to the same struts as will be apparent from Fig. 1. Bv loosen.-

the J-bolts the spacing of the plates relative to each other may be readily changed. here small adjustment of the capacitance of the condenser is desired, the uppermost plate may be constructed and mounted, as shown 5, 6 and 7. In that case the adjustable plate 15 is made similar to the fixed plates 4, except that instead of having external supporting arms it is provided with the internal spider 16 to whichv the threaded rod 17 is secured throuqh hub 18. The bushing 19 surrounds the rod 17 where it passes through the top member of the frame and between the bushine and a strap 20 is a nut 21 havinc an enlarged grooved portion 22 for receivine belt The pin 24 carried by the rod 1' rides in longitudinal slot in the bushing 19 and Jreveuts turning of the rod.

While I have described only one embodiment of my invention, I do not wish to be l...aited to the particular form shown and described, as it will be apparent that many modifications therein may be made without departing): from the scope of my invention as set forth in the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is 1. A condenser plate comprising a ring having: a rounded outer surrace and a disk secured to and bounded by said ring.

2, A condenser plate comprising a ring having); a rounded outer surface, and a pair of spaced plates secured at their peripheral portions to opposite sides of said ring.

3. A condenser plate comprising a ring having a rounded outer s ace and a pair of spaced dish d disks, said disks being in esilient engagement with said ring at opposite sides thereof.

at. A condenser plate comprising a ring having grooves on opposite faces thereof, and

a pair of resilient spaced plates, each of said plates being dished and being sprung into one of said grooves.

5. A condenser comprising a series of plates in electrostatic relation with each other, adjacent plates being uniformly spaced throughout their extent and each having a rounded peripheral portion of approximately the same thickness as the plates.

6. A condenser comprising a pluralita of plates, each having an edge portion sul stantially semi-circular in cross-section and having an efiective thickness substantially equal to the diameter of the edge portion and means for supporting said plates from their edge portions in spaced relation.

7. In a variable air condenser an adjustahlc plate. comprising a lin a pair of spaced disks engaging said ring at opposite sides thereof, means arranged between the disks and secured to the ring, and means engaging said means between the disks near the center thereof for moving the plate.

In witness whereof. I have hereunto set 25 my hand this llth daj of May, 1925.

PAUL R. FORTIN.

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