US1291110A - Energy-meter for alternating electric currents. - Google Patents

Description

C. PERDRISAT & A. PELOUX, ENERGY METER FOR ALTERNATING ELECTRIC CURRENTS:

APPLICATION FILED MAR 24. 19!].

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CHARLES PERDRISAT AND ALBERT PELOUK, GENEVA, SVTITZERLAND, ASSIGN'OES T FABRIQUE DES LONGINES, ERANCILLON & 00., A.,' OF ST. IMIER, SWITZERLAND.

ENERGY-METER EUR ALTERNATING ELECTRIC CURRENTS.

TEELTTE.

Specification 01 Letters Patent.

Patented Jan. 14, 1919..

Application filed March 24, 1917. Serial No. 157,071.

To all whom it may concern Be it known that we, Gr-rARLns Pnnonrsar and ALBERT PnLouX, citizens of Switzerland, residing at Geneva, Canton of Geneva, in the Eontederation of Switzerland, have invent/ed certain new and :useful Improvements in Energy-Meters for Alternating Electric Currents, of which the following is a specification.

This invention relates to an energy meter for alternating electric current.

It operates, like other known energy meters for alternating electric current, according to the principle of the Eerraris rotating field, and, like them, comprises a magnetic frame which includes, a middle part and two end parts, one ofwhich carries a current winding and the other a pressure winding, together with a piece of laminated iron constituting a shunt for the magnetic circuit of the current 'winding and serving to produce the phase displacement between the pressure and current fluxes. But it is distinguished therefrom by the fact that one of the extremities of the frame that carries the pressure winding, being bent, ex-- hibits at least one branch which is directed away from the middle part of the frame, in such a way that the piece forming the shunt and facing the latter can be displaced for the purpose of regulating the phase displacement without any other part of the meter but this piece having to be touched.

The accompanying drawing shows one constructional form of the meter'and two variations thereof, the whole being given diagrammatically by way of example.

Figures 1 and 2 are two elevations, taken at 90 from one another, of this construe tional form.

Eig. 3 shows a detail oi" it.

Figs. 4c and 5 relate to the variations.

According to Figs. 1 and 2 the magnetic frame or the meter comprises an element A constituting its middle part, having the shape of a E and being'placed in a vertical plane in such a waythat its central branch is vertical. Un to one of the eXtremities of the element A is fitted an element M, which constitutes one of the end parts of the frame, and is angular or bent so as to have the shape or an it, and the vertical branch of which carries a pressure winding K connected by conductors Q, It to the two conductors N, O, to which the devices supplied with the current, lamps 'P for instance, are connected. To the other end oi the element A is fixed a ll-shaped element 0, forming the other end part of said frame, and arranged in a vertical plane at right angles to the vertical plane in which A is located. The two vertical limbs of the element C are provided with two portions L, L of a current winding inserted in the conductor. N. The element M is provided with lateral angle pieces or elements E, E extending right over said vertical limbs and serving to close the magnetic circuit of the current winding. Finally, between the lower end of" the element A andthe element C is arrangedan element'l), which is T shaped and the middle branch of which has a horizontal portion passing between the two vertical branches of the piece C, almost at the level of the upper extremities of the latter.

The elements A, M, C are of laminated iron, while the elements D, E, E are or thin "between the two branches of which E passes.

. The magnetic flux produced by the pressure winding K traverses the magnetic circuit constituted by the elements M, A, C, E and E or D, M. But in order to obtain the rotating field necessary for the working of the meter according to the principle of Ferraris it is: requisite that said pressure winding flux should undergo a phase displacement of 90 with respect to the magnetic .fiux produced by the current winding L-L".

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v To this end, a part of the above magnetic circuit, the element M, is shunted by a shunting pieceB, made of laminated iron, having theform of an L and placed in such ayvay that its two extremities face the inner surfaces of the element M, which is also "shaped like an L,'the horizontal branch of which is directed away from the piece A. One of the extremities of the shunting piece isincontact withtheface of M adjacent i thereto, while-the other is always at a certain distance from the surface. of; M that faces it. The adjustment of the intensity of rtheashunting. and consequently that a of .the

phase; displacement between the pressure .and'current fluxes. is effected by varying the )aingapbetween the element/M and piece B.

allorrthat purposethe latter is fixed by a ,uscrewT which passes into anelongated hole 201 :V (-Fig. 3) which; it .presents to arplace U attached toithe element-"A. .The major diwmension-uof; the hole JV is.. .vertical,- which .enablesithe'element B 'toberaised or lowered Qwith respect to the piece M.

"zs'lhanks-torthe selected arrangement oflthe relement'sfM andrvsB, the adjustment of the I phase displacement by. means ofthe -mag .netic shunt is effected in a simple andprac- .tical mannerQby displacing-the second without having to, touch any otherrpartof the meter but that.

According toy-Fig. 4 the piece 13 and elevment M are. also L-shaped, but the first is of .such dimensions that its innersurfaces face "thehrectangular surfaces-that are at the ex- A tremities ofthe second' The element M may .alsobeC-shaped (Fig.1 5), having both its end branches? directed away: from the elemerit- A. Inn-this case the piece B. has the v.sshape of'an- I, and the-shunt magneticcircuit comprises two air gaps.

Themeans enabling thepiece B to be displaced without touching 'the'other parts of rents operating onthe principle of the Ferthe meter may differ from those illustrated in thedrawing and described. The branch I orbranches of the element M, while still be ting directed away from the element A, may

not be in the same plane as the latter.

:We claim as our invention:

l gln ameter for alternating electrlc curraris rotating .field, a magnetic frame havmg a centraland two end members, a current winding on one end member, a pressure wind1ng on -the1other end member-which 1s 7 angular and: has a: .branchfdirected [away from: ithefcen'tral-member of the. frame, and

an, adjustable member. cooperating, with said angular member to provide a shunt path for the magnetic-flux-set up by the pressure winding.

:2. In a meter for alternating-- electric currents; ,operatingon the principle of the Ferraris rotating field, a magnetic frame having a central member placed vertically, an angular shaped end member secured to one extremity of the frame with a branch directed away from the central vertical member of the frame, a pressure winding on the said angular shaped end member, an end member connected to the other extremity of the frame, a current winding on the said second end member, and an adjustable member cooperating with said angular shaped end member to provide a shunt path for the magnetic flux set up by the said pressure Winding.

3. In a meter for alternating electric currents operating on the principle of the-Ferraris rotating field, a magnetic framehaving a vertically-placed central member, an L-shaped end member secured adjacent one extremity of the said frame and having a branch'thereof directed away from the central vertical portion of the frame, a pressure winding on the said L-shaped en'd member, a U-shaped end member secured to the other extremity-of the vertically placed frame, a current winding on the legs of the said U-shaped end member, and an adjustable member cooperating with said L-shaped end member to provide a shunt path for the magneticfiuxset up by the said pressure winding.

4. In a meter for alternatin electric currents operating. on the princip e of the Ferraris rotating field, a magnetic framehaving a central vertically placed member, an

L-shaped end member, the endof its longer branch secured adjacent the extremity of the vertically placed frame with 1 its shorter branch directed away from the central por- "tionofthe" frame, a pressure winding on the longer branch of the said L-shaped mem- -ber, a U-shaped end member secured adja cent the other extremity of the said frame,

branch directed away from the central portion of the frame, a pressure winding on the longer branch of the said L-shaped member, a 'U-shaped end member secured adjacent the other extremity of the said frame, members associated with the L-shaped member for completing the magnetic circuit in the In testimony whereof We have eflixed our U-shaped member, a T-shaped member as slgnatures 1n presence of two wltnesses.

sociated With the said U-shaped end memher, and a member adjustable in the mag- CHARLES PERDRISAT' netie frame and coiiperating with said ALBERT PELOUX' L-shaped end member to provide a shunt Witnesses:

path for the magnetic flux set up by the R01). DE WERSTEMBERG, pressure Winding. Lotns H. MUNIER.

Emmet e1! this patent may be obtained for five cents eaoh by addressing the Commissioner of latent,

Washington, D. 0." 1

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