US872572A - Electric-meter case and support. - Google Patents

Description

PATBNTED DEC. 3, 1907.

T. B. MURRAY.

ELECTRIC METER CASE AND SUPPORT.

APPLICATION FILED JULY 13, 1907. Y

2 SHEETS-SHEET 1.

PATENTED DEC. 3, 1907;

T. B. MURRAY. ELECTRIC METER CASE AND SUPPORT.

APPLICATION PILED JULY l3 i907.

BERT 2.

- "iNVlNTOR m NEY Mm: a?

Ctr

THOMAS E. MURRAY,*

nrawrar (z-105917211. casa 1m n sorrow.

To all whom *itmwy Be it known that I, Tnoms E. M RRAY, a citizen of the United States, at NBW- York, in the county of New Yorkand State. of New York, have invented aj'certain new and useful Improvement in-ElectriwMeter Cases and-Supports, of which the'following is a specificatio he invention relates to an electric meter case and support, more articularlydesigned k for receiving the usua meter mechanisms" pletely prevents access to the circuit.

used in electric li hting systems. V The object of the invention is to provide a case and support simple .in construction, which offers everywhere close joints and comw r s which presents no means whereby induced current canbe caused and-energy'in that way 'purloined, in -which all parts are clamped together by a simple detachable fastening fand guarded by a seal, and in-which the-me ter mechanism and case maybe readily removed when not in service from the perma nent partsof the device, and a simple shield substltuted and sea'ledin place. v

The invention consists in the combinations pointed out in the claims. 1

In'the accompanying drawingsFigure 1 is a side elevation o the meter. case in place. Fig. 2 is a section of the case online a; as of Fig. 3. Fig. 3 is a section on line 'y ofFig.

4 is a front elevation. 5 is a 2. Fi .front evation showing the shield or cover substituted for the case. Fig. 6 is a section on line 2 z of Fi 5. 1 H Similar numbers of reference'indicate like parts.

1 is a recta ar plate of non magnetic 3 metal, such as a urnimum, having asurrounding flange 2, and on its rear side three lugs, 3, 4 and 5. Said lugs have openings to receive the .fastening screws 6, which pass through a back plate 7 also of non magnetic metal,

having partial side flangte's 8. The back plate 7 rests against the which are openings 10 for circuit wires, two of which are here shown at 25, and is. itself provided with a central opening 11, through which said wires may pass. On the screws 6. are washers 20,.which may be of elastic material such as rubber, and which separate the lugs 3, 4, 5, fromthe back plate.

Eor convenience in readily attaching the fla ed of Ratentk 7 Application filed H1118. 1001. serm misaasqv.

tends a little beyond t v 1 plate 1, andIis inclosed in the case 13. use or wall 9, in"

plate 1 to its support, the lug3 is provi ed 'PatentedDeaS, 19,07.

ortion, ch. passes over the head of the astening' screw, and afterwards theplate'is with anagsrture having an enlarged lower J lowered'to the narrow part of said apes lug. D

12 is a recta ar nm ofnon'm plate 7. The rear-edges of the wall of 12 of sai wall-is curved inwardly to a rectangular openi in which fits the side flanges 2 of theback'p ate 1'. The case or cover 13 of sheet metal is open on its rear side and the rear edges of "its wallsfrest :fion the upper surfaces of the curved over w s of run 12,

"erture on the screw shank.- Also for con-Fa I fvenience of adjustment the screw aperture in lug 5 may extend laterally through the tic .'metal','in'which ft; theside flanges 8 0 back rest a ainst the'9.. The outer portion closeproximity to the rectangular opening, and hence in close proximity to the outer faces of the surrounding flanges 2. of .back

plate 1.- The outer edge ofsaid-fiange exe um,

substantially 7.

as shown in Fig: 3,, and enters a recess 14',

formed by a suitabl shaped flange on the inner side of the w of case 13, in whichre- .ces's: any suitableielastic packing. may

placed. Ri' 'dly fastened to plate 1 are rods 15, whic extendoutwardly throkifih 16 on the inner side of-the w of case.13,

guide 8 4' 85.

and through openings in'the'front wall of 4 said case. The

said rods is thre parallel arms of a sprin'gnm .175 Q In the flange 2o p m iere op ms (dotted lines, Fig. 3 for circuit wires, which extendthrough wooden lblqcks-.. l9,--

rotruding. end f of eachi of ed to'rece'ive the thread d secure to the inner-sides of said-fl' The meter mechanism with which wiresconneot is not herem shown, since it i n t forms no part of the present invention; Itis, however, all supported onand secured to In assembling the arts, the back is placedagainst the use 9,;so thatits'opening 11 comes over the apertures 10 in said.

plate 7.

base. The flanged plate 1 is then put in position and both flanged late and backplate aresecured to the base y the screws 6 pass- 1 ing through the In already set forth.

3, 4, 5,-in the'manner he rim 12 is then put in position, and upon it is placed the outer case 13, the rods 15 through the interna suitable seal 22, so that the parts cannot be I 1 against the outer surface of 12 and the rear edge of rim 12 closely against the wall or base9, The packing in recess-'14 on the inner side of the walls of case 13 is also forced down upon the outer edge of the flange 2 of platel, and the spring or elastic washers '20,

thus become Compressed and serve by their.

resiliency to make the joint in the recess still anore close. After the parts are thus as- 'sembled and secured, the ends of short chains 21, which are attached to eyes on nuts {17 are brought together and fastened by any taken asunder Without rupture of said seal.

' In the front wall of the case 13 is an opening 23, for 0 scale.

When the meter is to be withdrawn from service, its mechanism is detached from the plate 1 and removed, together with the case 13 and rim 12. ,A flanged cover 24 of sheet 'nvenience in showing the meter metal is then ut over the plate 1, as shown in Figs. 5 am, 6, and secured by short rods similar to rods 14 connected by chains and a seal, or in any'other suitable way.

It will b e'observed that by this eonstruction Icom letely protect the circuit wires from outsi e interference, andI eliminate all open joints. By making the backplate 7 and rim 12 of non magnetic metal I also prevent induced currents in said plates. As all parts of the device are clamped together, tight joints-everywhere exist, and these cannot be disturbed because of the seal; -'The advantage of being able to remove all the meter mechanism and cover from the plate '1 when'the meter is not in service and to substitute thereforsim ly the shielding cover in place of rim 12 will e obvious.

I claim:

1. In combination with a base, a back late thereon, .a 'flan'gedplate supported in rent of said back plate, a rim surrounding said back plate andflan ed plate, a coverin front of said flanged p ate and having its edges bearing on said r1m, and means for securing said cover in place.

2, ncombination with a base, a back plate having outwardly projecting side flanges, a flanged plate supported in front of said back plate, a rim surrounding said back plate and flanged plate, and having'its rear edges bearing on said base, in which rim said 'back plate flanges fit, a cover in front of said flanged plate. and having its edges bearing on said rim and means for securing said cover in place;

3. In combination with a base, a back plate of non magnetic metal thereon, a flanged plate supported in front of said back plate, a rim of non magnetic metal surrounding said back .plate and fl ngedplate, a cover in front of sa1d flanged plate and-having its edges bearing on saidrim, and means for securin said cover in place.

i. "-n combination with a base, aback plate thereon, a flanged plate} means for elastically supporting said flanged plate in front of said back: plate, a rim surrounding said back plate and flanged plate, a cover in front of said flanged plate having areccss' re ceiving the edge of the flange ofsaid-flanged for securing said cover in its inner wall, and means for securing said cover in place.

6. In combination with a baseyaback plate thereon, a flanged plate secured to and supported in front of sa1d back plate, a'rim surrounding said back plate and flanged and means for detachably clamping together said cover, rim and base.

7 In combination with abase, a case supported thereon and at a distancetherefrom a .plate, a cover in front of said flanged-plate rim having its rear edges bearing on said base and provided with an openin having its edges inclosing and bearing on t 145 outer wall of said case, and a shoulder on said outerwa'll between which '8. In combination with a base, a back v and said base said rim is received. z

plate thereon, a flanged plate secured to and supported in front of said back plate and flanged plate, a cover in front of said flanged plate, threaded rods extending from said 1 flanged pla ethrough the front wall of said cover, and ecuri-ngnuts on said rods.

9. In comb nation with a base, a back plate thereon, a flanged plate secured to and supported in front of said back plate, a cover inclosing theflange of said back plate and means for securing said cover in place.

10. In eombinatlon with a base, a case supported thereon and at a distance there- ..from, and a rim having its rear edges bearing on said base and provided with an opening having its edges inclosing and bearing on the outer wall of said case.

11. In combination with a base, a plate of I non magnetic metal on said base, a case sup: ported 1n front of sa1d plate, a rim ofnon magnetic metal surrounding saidcase, and

having its outer edges respectively bearing on said base and sa1d case wall, and circuit wires leading through said plate and into said case at points between the inner wall'of said ease and the line of contact of the edge of said rim and said case ammz a 12. In combination with acase adapted to In testimony whereof I have affixed my containing electric meter mechanism and signaturein presence of two witnesses circuit wires entering the same, a. base, a v shield of non magnetic metal on said base in M rear of said case and traversed by said wires, Witnesses: and .a shield ofnon magnetic metal surround- GERTRUDE T. PORTER,

ing said case and in contact; with said base. MAUDE A. ROGERS.-

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