US1309642A - larson - Google Patents

Description

D. C. LARSON.

REVERSE PHASE RELAY.

APPLICATlON FILED JUNE 2351911.

' Patnt'ed J uly 15, 1919.

BSHEETS-SHEET I N a x &

BY Lf ATTORNEY D. C. LARSON.

REVERSE PHASE RELAY.

APPLICATION HLED JUNE 23. 1917.

PatentedJu1y15,1919.

3 SHEETS SHEET 2.

' INVENTOR WITNESSES ATTORNEY DEC. LARSON.

REVERSE PHASE RELAY APPLICATION FILED JUNE 23, $917. 1,809,642. E Patented July 15, 1919.

3 SHEETS-SHEET 3 UNITED STATES PATENT DAVID C. LARSON, F YONKERS, NEW YORK, A$SIGNOR T8 QTYIS ELEVATSR COMFANY, 0F JERSEY CITY, NEW JERSEY, A CORPORATION 61: NEW J'EPtivEY.

REVEfEhSB-PHASE Application filed June 23,

To all whom it may com-em Be it known that 1, Dawn C. Lanson, a citizen oi. the United States, residing at Yonkers, in the county of Westchesterand State of New York, have invented a new and useful Improvement in Reverse-Phase Relays, of which the following is a specification.

My invention relates to improvements in 10 reverse phase relays, in which clectro-ningnets are employed to attract a suitably poised movable armature, carrying a contact, which may constitute one of the contacts in the circuit of a supply or receiving; apparatus; the

relay may be described in brief as a reverse )hase elcctro-mamietic automatic circuit a H r: i breaker. It \Vlll, provide protect on aga nst phase reversal, low voltage or the opening oi one of the su J )l 1 lines to the receivi a.)-

2'0 paratus.

Among the objects of my improvement are, to provide a relay of the kind which may be used for either two or three phases; to design a relay in. which gravitational 2o forces are used to move the armature to re lease or separate the contact from the other contact in the circuit of therecci ing apparatus; to resort to the use of copper for the contact carried by the armature of the'relay,

and to carbon for the contact in the circuit to the receiving apparatus, in other words, carbon to copper contact; to constitute a simple apparatus, the parts .in which are readily accessible for inspection and observation', cleaning, adjustment for wear or otherwise, repairing or renewing, and in which the power consumed to operate the relay is practically negligible.

I attain these objects by the apparatus 40 sh0wn in the accompanying drawings, in

which.

Figure 1 is a front or face View or? the relay, mounted on a slate or board;

Fig. 2 is a side ViBW of Fig. 1, looking in the direction from left to right.

the relay applied between a three wire systern for two and three phaseaand a motor.

, Figli is a View similar to Fig. 3 showing the relay applied to a three wire system and connected 1n series with the'motor.

Specification of Letters Patent.

. screw,

latenied July '15, 919

Serial No, 1%,544.

Similar numerals refer to similar parts throughout the several news.

llpon a slate. H, I allix a haseiu? support,

legs. 5, of the cores, 3, ll har placed spools I or windings, (S and T; and connected the end or terminal, 8, of one oil? the spools, 6, to a binding post, A, E i 1, and the other end or terminal, 9. iii the spool, (5, to another binding post, ii, and the end or te'rininal, 10, oi the other spool or winding, 7, to still another hiiuling post, t, l ig. l, and the other end or terminal, ll, of the spool '7, to a :t'mu-th binding-g post, the four posts being mounted on the slate, 55. At one end, 12, of the base or support, 2,-in this instance, the lower end, as i. have shownthe support, 2, placed Vertically-ll provide bearings for journals,which I will now describe more particularl The lower end. of the support, 2, is brought outwardly at a right angle from the vertical part of the base to form a part, 13, in which l have formed journal bearings, 11' conunsised of two set screws, 15., having a'slit or iii ,136, for the entrance of a screw driver and the other end a bearing to receive the ends or a journal, 17. The journal supports an armature for the-electromagocts 'eonu'irised of the cores, 8 and windings (3 and i. l. have shown the armature as a stri of aluminum, 1.8, in the shape of ported by rods, 19, fast at their upperends to the segment, 18, and'at thei r lower ends to proiectiou. or lug, 5 50, that is fast on the journal, 1'2, by means of a washer, 21, and a 9 screwed into the lug, 20, and se v ing to bind the W2 sher, 21, the lower ends of the rods, 19, and the luv 20 ti ht to ether.

Thelug 2O fast on the journal 1?. I have,

secured to the journal, 1'7, a weight or mass,

23, extended from the under side of the our-H no}, i, and to one side of its longitudinal axis or center, the effect of the weight 23, cting downward, tliirough the journal, 17, is to constrain. by grav'itational force thev journal, 1'3, to turn about its horizontal axis,

and thereby tend to more the armature, 18,

to one side a perpendicular line dra n through the vertical middle ofthe journal .tacts, Q6 and 29, from each other.

and the armature. On the side of the jourrail, 17, opposite to the direction of the projection of the weight, 23, l have formed a lug in the shape of a ring". '24, projected from the lug 20 in which I have secured the holder, 25, ot'a copper contact, an. and

joined the terminal. 27, ot' the holder, 25, lo a binding post, E. by a conductor w re, 28. The contact, cooperating with the copper contact, 26, is a carbon contact, 2 and is held in a contact holder 50. screw-thrcaded into a lug, 3t, secured to the slate, by a binding post, F. The weight of the copper contact holder, 25, prepondcratcs the weight of'the projection, 23, and serves to turn the journal, 17, on its axis and separate the con- It will he observed that according to the design of my relay, the armature, 18, is placed above or one side of the electro-niagncts. and the pivotal point or journal of the aru'iature and the contacts on the other side of the electroinagnets, by which arrangement I am eliabled to devise not only a compact relay. but one in which there shall he certainty of operation and a minimum innnher ot' movin 2' parts, all oi which go to make a more perfected, desirable and reliable relay in actual service conditions. These contacts may be put in the circuit of any receiving or supply' apparatus.

In the Fig. 3, I have shown the plied to a two phase, i'our tern, in which the binding posts, A, it, D, are connected to the four wires, 1, :3, 3, 4, of the supply system; and the binding posts, E and l, are connected in the wire, 1, of the four wires of the supply system by a lead, 32, and to a solenoid winding, 325, in a lead, 3%, to the wire, 2, ol the tour wires of the supply system. The solenoid Winding, incloses a solenoid core, 235, which serves to open and close a switch in the circuits constituted of the tour wires, 1, 2, 3, 4, to a motor, M.

In Fig. 4, I have shown the relay applied to a three wire system for two and three phases; the arrangement in applying the relay apwire suppl sysrelay is practically the same as that described and shown in Fig. tion to a four wire system, except that there being only three wires. the ends or terminals, 8 and 10, oi the spools, l3 and T. are joined to a common hindin; post, (i, from which is a lead, an, to the supply wire. 2. of the three wires, 1, 2. ii, of the three wire supply system.

In Fig. 5, the relay winding-l3 is coninclcil 3 for its applicain series with one of he phascs ol' the stator, and winding T is connected in scrws with another phase of lhe suitor. .\n clcct].'0lil2i;fli0l ic main line switch. S. is provided to connectand disconnect the motor .\l with the supply wires 1. Qand 1%. A push button, 37,,Opcratcs to close a circuit for the. winding the relay works in the. wrong direction 38 of the main line switch, the relay contacts, 2h and 2 conlrollin; a scll-holdiugr circuit for [he said winding. An additional push button. 25!). is includcd in series with the winding. 38, in therircuils thcrcl'or controlled by the push button, 3T, and relay contacts. ii and '11 I The operation ol' the relay is obvious from the foregoing description. of ll cons! ruclion and application, but it may he brielly stated that. upon the encrgizaliou ol' the clcclrO- magnet, and the phases being in the desired direction, the armature, In, is moved in the direction suitable to close the contacts. 2i; and 2!), and the solenohl-opcrated switch in the supply circuit to the motor. M, will he ltept closed. Subsequently, it something should go wrong, as for instance. one of the supply lines, l, I}. or 1, 2, 1i, 4, being opened, one of the windings or spools, (i or 7, will be opcn-circuitial, aiul the other winding will not be strong enough to hold the armature, l8, attracted against the force of the weight in the holder, 2?. ol' the copper contact, 26, lending to turn the journal, 17. on its axis, and separate the contacts, 243 and 2t), and opcu-circuil the solcnoid-winding. 33, and allow the solenoid core to drop and cause the supply circuit to the motor, M, to he opened. ()l' course, as has been stated, the contacts, 2 3 and it), may he used to close a circuit to any other desired devicc than to a solenoid. and so on. In case of a reversal ol the phase. the armature, 18, will move in a directi n to turn the journal, '17, on its axis. and the contact an. away from the conta t 25 and open the circuit to the solenoid, and the supply circuit to the motor. In case of excessively low voltage, gravitatioual force will again prcpondcralc over the force, ol' the elcclro'inaguclic attraction of tho armature, 1H, and the supply circuit will be opened.

lhc series type of reverse phase relay illustrated in Fig. 5, alloi'ds additional protecliou o\'c1' the shunt type relay, in that it operates to dis onnect the motor l'roni its supply source it a phase in the motor itsell' opens. or it a phase in the line supply opens while the motor is running.

it upon applyin the relay ii is found that to accomplish the purpose ol its desired use, the leads to the posts, A and ll, or (7 and I). should be reversed, as is well understood.

1 have described the relay more or less particularly, but it is understood. of course, that l do not intend to limit my invention to particulars. but I desire that it shall include all aml everything that is within the spirit ol' my invention.

What 1 desire to claim is in an allcrnat-in current relay, the comhinalion ot a pair of clcclro-magncts, substant iall y U-shapcd cores therefor, the cores Hit) ill)

10 jecting weights serving to accelerate set apart and slightly divergent from each other, an armature inthe gap between the cores, a journal for the armature, at the opposite 1- other endfpf the magnets, the journ'al having a wegh't' projecting frolnone side thereof adapted to turn the armature t one side of its pivot in an inoperated, position and a contact projecting from the op posite side of the journal; the two prothe movement of the armature, it being turned to one side of its journal, and adapted to contact with another contact in operation.

In testimony whereof, I have signed my name to this specification in the presence of 15 two subscribing witnesses.

DAVID C. LARSON. Witnesses:

VIERNEST L. GALE, Jr.

HAZEL R. GATES.

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