• REF ID:A67801 

Patented Ja. 18, 18Z9. 1,699,122· 

UNITED STATES PATENT OFFICE. 

HABOr.D T llJIJILft, 01' PBILAJ>BLPB:IA, PBJllll'ft'LVAJiu, ABllIGllO:B TO GJIBJIBAI. 

"JILBC'.fBIC ODJIP.All'Y, A. COBPO~ll' 01' lfBW TOU. 

ODJl'TBOL BYEfi' ... 

.&JPUG&Uoa !le4 l••'IWJ' 11, 1111' Serial •o 18',UI. 

My 1n'f'enbon relates to control systems, 

and ;particularly to control systems for eontrolbng the supply of energy to a prime 

mover driving an altermttlng current dyna:. 

I mo-electnc machme 

In altematmg current systems m which nn 

altemator is arranged to be synchromzcd 

with an alternatmg current system to wluch 

1t is to be connected, it is the usual practJ.ce 

Ut to control the supply of energy to the pl'lDle 

1110\•er m such a manner that pnor to the 

connection of the alternator to the S)stem, 

the alternator is driven at substantially 

s;tnch1onous speed so that it passes slowly 

11 through synchronism and, therefore, can he 

readily synchronized with the system After 

the alternator 1s connected to the system. the 

supply of enerp:y to the prime mo\ er is then 

increased cm that the generato1 supplies its 

l!O she.re of the load 

One obJect of my invention is to p1ov1de 

nn improved arrangement fo1 automatically 

1 e~ule.tmg the i.upplv of enet~\- to the dnvmg means for 1t generatoi so that the genera-

.!& toi is d11ven at such a speed that it can be .. atel:y and readily connected to an electric 

c1rcmt o.nd so that the ~enerator takes on its 

share of the load after 1t is connected to the 

electric c1rcu1t 

30 An othe1 ob]ect of my mvent1on 1& to provide an. improved arrangement for automatically regulating the sll}lply of energy 

to 11 pume mover wliich drn.es ILn alternator, 

so that with the alternator disconnected from 

11 the svstem to which it is to supply current, 

the alternator l"Uns at such a speed that it 

passes M> slo"'ly through synchron1"m that 

the closm,r of tlie mrcUit breaker between the 

nltel'llato1 and the system may be effected '° at the proper tune, either manually or nutomaticnllv and so that the su:pply of energy 

to the pume mover is autematicatiy mcreased 

to a predetermined amount after the circuit 

bren.ie1 is closed 

41 My mvent1on will be better understood 

fiom the following descr1pt1on, taken in connection \vith the accompanymg drawmg the 

&mgle figure of "'hich d1a~ram.matically 

sbO\vcs a system embodymg my invent.ion, and 

'50 its c;cope will be pointed out 1n the appended 

rla1ms 

Jlefer1 mg to tbe accompanying drawing, 1 

represents au alternatmg cur.rent system 

winch is supplied by a Bllltlible source diagrammatically mdicated at 2 3 is a dynamo • 

electric plant compnsmg a motor meami 

shown as a prime mover 4 of any sUitable type 

dr1vinlf a generator shown as a.n 11olternator 5 

which is adapted to be connected to the system 1 by means of a circuit breaker 6 It will ID 

be obvious, however1 that any other swtable" 

driving means may be employed for drivmg th~rator 

The supply of energy to the ~Ime mover 

4 may be controlled by an7 su1table_.vern- II 

mg IQ.eBJls, examples of which are well known 

in the art. As shown In the drawing, the governor mechanism 7 com;pr1ses the well kJiown 

fly ball governor 8, which works against the 

tepmon of a sprmg 9 In order to vary the TO 

setting of the governor mechanism 7, means 

are provided for adJustmg the tenmon of 

the sprmg 9 .As show11, this means comprises a screw mechanism 10 which is operated by.a reverSible synchromzmg motor 11 Tl 

For controlling the settm_g of the governor 

mechanism 7 so that the alternator 5, when 

the .c1rcUit breaker 6 is open, passes slowly 

through synchronism and so tliat the alternato1 automatically takes on it.a sham of the IO 

load when the circuit breaker 6 1S closed, I 

provide two rotatable elements 15 and 16 

wh1eh are arranged to be dnven respectivelI 

nt spcPds proportional to the frequency of 

the alternator 5 and the system 1 The ar- u rangem~nt is such1 however, that the elements 

15 and 16 are driven nt the same speed by 

their respective drivmg means only when the 

frequency of the altematoT ti 1s slightly 

great-er than the frequency of the system 90 

When the frequency of the alternator is the 

same or less than tlie frequency of the s~­

temhthe arrangement is such that it tends 

to c ange the settmg of the governor so as to 

mcrease the supply of energy to the prime DI 

mover 

Any SUltable means may be provided for 

respectively d1 m·ng the elements 15 and 16 

at speeds proportional to the frequencies of 

the alternator 5 and the system 1 As shown, tao 

the element 15 is duven by a synchronous 

motor 17 electricallv connected to the alternato1 5 and the element 16 is driven by a 

synchronous motor 18 electncally connected 

to the systpm 1 Suitable gearing 19 JS pro- IOI 

vided between the motor 17 and the element 

@'pp roved for Release by NSA on 09-05-2013 pursuantto E .0. 1352a I 
• REF ID:A67801 • 

16 and smtable gearing 20 IS provided be- for eftecb.n~ the closmg of the C1l'cu1t breaker 

tween the motor 18 and the element 18 &o that 6 at the demred tune. , the two element.a 1IS and 16 are driven at My mvenb.on IS not hmited to 1J11_ plirb.cuthe same ~ by the mot.oqr 17 and 18 1'8- lar arran~t for electing the closmg of 

I specbvely only when the f1-equency of the the circuit breaker 6, but is particularly 711 

alternator 5 exceeds the fl'equency of the adapted for use in systems m which the clossystem 1 a p1-edeterm1ned !l!Dount. mg of the circmt tireaker 1s elected by an 

The rotatable element 15 is proVIded with automatic P.!lchron1zer Howeve~1 1n orde1 

two spaced contacts 21 and 22 which a1e to simph:fi the dISclosui-e shown, the c1rcu1t 

ID ada~ to be engaged by a contact 23 on the breaker 6 has bsen rroVJded with a clOSl.Jlg 71 

rotatable element 16 These contacts are ar- coil 30" the circuit o which is arra.naed to b8 i~ in anJ' suitable manner, examples of closed oy a manually operated sw1tcli 31 

whiCh are well known m the ai t, so that when The operation of the arran_gement shown 

element 15 is driven at a faster speed than the m the drawml 1s as follows With the J?rime 

u element 16, one of the contacts on the element mover plant m operation and the circuit 811 

15 m moved into engagement with the con- breaker 6 open, tho contacts 21 and 23 are in 

tacts 23 on the element 16 and when the ele- enpgement and the control relay 25 1s interment 15 IS driven at a slower speed, the other m1ttently ener~d to change the settmg of 

contact on the element 16 is moved into en- the governor Diechamsm 'I' so as to tncrease 

ID Psm!lent with contact 23 Contacts 22 and the supplv of energy to the prime mover 4 83 

23, when m engagement, eomplete a circuit and tb.ereb:r mcreue tt.s speed. until the fntthrough a control rela.y 24, which m tum com- quency of the generator 6 exceeds the frepletes a. circuit for tlie synchronizing motor quency of the 111stem 1 Diore than a pre11 so tha.t it rotates in one d1recbon, and con- determmed amount. When the frequency of 

II tact.a 21 and 23, when in engagement, com- ~e generator 6 does exceed the frequency DD 

plate a circuit through a control r&:ay 25. of t1ie system 1 l>:y .more than SBid 11~­

whlch m"turn completes a circuit for t!1e syn- mmed amount, t1:le elemettt 15 is driven at n 

chromzmg motor 11 so that it l'otates m the faster~ by the motor 17 than the element op~te clirecb.on. 18 is dnven by the motor 18, BO that contact 

ID For the purpose of tlus desc1'1ftion, 1t will 21 is moved out of engaP!Dent with contact 13 

be assumed th.at the direction o rota.hon of 23 and contact 22 is moved into engagement the element.a 15 and 1618 s~h that the contacts with contact ~'I. wherebJ the control relay 24 

22 and 23 are brought mto engagtmient when IS mtermittenuy .energized to ~ the 

the speed of the element Ui exeeeds the speed setting of the governor mechanism 7 m sucl1 

II of the element 18 Therefore, relay 24:, when a manner as to decrease the supply energy of 100 

energized.1 causes the synchromzmg mot.or 11 the l?r1me mover 4: and thereb:r decrease ifs 

to rotat.e m a direcb.on to effect a decrease in speea. Therefore, 1t will be observed that, 

the amount of energy snpphed to the pnme since the elements 15 and 18 are arranged to 

mover 4:, and the relay 25, when -ener11zed, be dnven at the same~ by their re~tive 

"tD causes the motor 11 to rotate m a direction to motors only when the frequency of the alter- 1oa 

eftect an mcreue in the amount of energy nator 5 exceeds the frequency of ~stem 1 h)'. 

"'1pphed to the pnme mover 4: In order to a predetenm.ned amount, the amount of 

render the Cblltrol UTll.JIJlmoent inoperativ..e energy supp]:red to th_e pnme mover 4: when 

to mcrease the amount of-energy supphed to the alternator 5 is below ~nchronlSDl 1s ' 

" the prune 1":.7er ' above a predetermmed l!'adually mcream so that tlie speed of the 110 

amount, a t swit.ch 26 is provided. m the altemntor IS is increased until it reaches a 

circuit of the control relay 26 a'lld lS arranged value shghtly above synchronous speed If 

to be opene(l by the screw mechamsm 10 wllen thp speed of the altern.,tor 6 exceedS its syn- the governor has a predetermined settmg chronous speed by more than a predeterm1:Ded 

ID Iii Qrder ta prevent huntmg, 1t 18 prefer- amount, die contacts 22 and 28 are moved Ill 

able to-complet.e the circmts th.rough the con- into ~gall8JDent With each other so that the 

trol relays 24 and 25 1nterm1ttently nus amount of energy supplied to the pnme result may be accomplished ill any suitable mover 4: is decreased to CBU1!8 the speed of 

manner, examples of which are well known the alternator 4 to d~ase toward synchro11 in the art. In the arrangeinent shown m the nous speed The mherent ~d vanat1on of 121' 

drawmg, ~ result IS obtained bv arrangin_g the pnme mover 4 ord1nanly will be suftic1ent 

tha corrector nng through \\l'hich cunwe!lt 1s to cause the speed of the alternator 5 to apled to the contact 23 BO that the c1rcu1t J>ronch suffi.ciently near synchronous speed so 

through the contact 23 JS complet.ed only dur- that the voltages of the aJtemator and the 

• ing a fredetermmed portion of each revolu- svstem pass slowly enough through tl1eir m- 12;:; 

tion o the element 18.. - phase condition to permit safe synchronizing 

Suitable means are provided which may be In some cases m practice, however, it ma) be 

controlled mther manuallJ or automatically desu able to provide other smtable meani. tor 

m ~ to predetermmed electn.ca.l con- so controlling the c1rcmt of the synchromz11 diticms of tl\e altQrnator IS and the system 1 mg motor that it llill &e energized for a 1:10 ~ ---- -
..... 

• REF ID:A67801 

sulicient time when the contacts 21 and 28 

are moved mto engagement to cause the sr.ed 

of the alt.ernator to decrease to a value mther 

more nearly equal to svnchronous speed or 

I below synchronous speed. Tins result may 

be accompbshed b;r demgn1ng the control relay 24 BO that it maintains its contacts closed 

for a longer time after ~t becomes deenergiz¢ 

than the relay '25 does, or by designmg the 

JO motor 11 so that it rotates faster when it 

rotates JD a direction to decrease the supply 

of energy to the prime mover than it does 

when it rotates JD a direction to increase the 

supply of enetgy 

11 Therefore, it will be obt.erved that with the 

c1rcu1t breaker 6 open, the sett1n11 of the 

governor mechanism 7 is controlled m such a 

manner that the alternator 5 passes slowl1 

through S)nchromsm 80 that the circmt 

2ll breaker 6 can be closed at the pro~r time 

After the circuit breaker 6 is closed the 

frequencies of the generator 5 and the system 

are the same, BO that the motor 17 dnves the 

element 15 at a slo\\ er speed than the motor 18 

21\ drn•es the element 16. Consequently, the 

conta.cts 21 and 23 are m engagement with 

ench other and the control relq.y 25 JS mterm1ttentl1 ener~d to cause the motor 11 to 

change the setting of the governor m such a 

so mllD.ner 88 to mcrease the supP!y of energyto the _Prime mover 4 until tlie JOVernor 

mechanism has a predetermined setting 'vhen 

the lurut switch 26 JS o~ed to mterrupt the 

circmt of the control relay 25 Therefore, 

II when the circuit breaker ls closed, the arrangement operaielj automatically to readJust 

the setbng of the governor automatically to 

a predetermmed value, 80 that the generator IS 

1s caused to supply a certam amount of the 

4.0 total load on system 1 

While I have, m accordance with the patent 

stn.tutes1 sbown a.nd described my mvenbon as 

embodying various devices diagrammatically 

md1cated, changes nnd rnod1ficati0Ds will be 

'" obvious to those c;lnlled m the art, and I, 

therefore, ann m the appended claims to cover 

1111 such changes and modifications 88 fall 

witlun the true spirit and scope of my mvent1on 

an What 'I claim a.s new and desn-e to secure 

by Letters Patent of the United States JS 

1 In combmabon a generator, a load nrcmt a switch for connecting the generator 

td" the load circuit motor mea.ns for dnving 

r.1 said .rnmerator, and means responsive to the 

relation between corresponding electrl.C81 

conditions of said 1fenerator an(I SRJd load 

cncuit for controlling the operation of said 

mot.or menns to increase the speed of S81d gen111 t'rator when said electrical conditions of the 

generator and load c1rco1t are substantially 

the same whereby sRJd ~erator '"ill take on 

load when said switch is closed 

2 In combmation,, an electric circuit, a 

• generator adapted to De connected to said cira 

cuit, dnVlnJ means for said generator and 

an automatic spee4 and load controllmg arrangement for sud driving means comprising means responsive to the ielabon between 

corresponding elecb 1cnl conditions of s1ud ill 

generator and sa.1d c1rru1t for 1-egulabDg said 

dnv1ng means so that said electiical conditions of said generatoi and said c1rcmt n1e 

maintm.ned substantially ~ual "hen said 

generat.or JS disconnected f1"0m said c1rcu1t i.; 

whereby said generator may be readily con· 

Dected to said circuit and so that the suppl,)" 

of energy to said dr1v1ng means is automaticall_y increased to a predetermined value when 

sRJd generator 1s roldlected to said c1rcmt so 

3 In comb1natJon, an electric circuit,. a 

generator adapted to be connected to said c1rru1t, dr1vm11 means for said generator, and 

an automatic load col).ti"Olhng arrangement 

for the said dnvmg means comp1 imng mean11 .tl:I 

responmve to tbe relation between corresponding electrical conditions of snid generator and l'lrcmt arranged to effect an increase 

m the supply of enrigy to sftld dnving means 

when sBJd eledr1cal cond1t1on of said ,renern- 111.1 

tor ii:; equnl to nnd le.cis than thn.t of the electric 

c1rcu1t 

4 In comb.mabon, a ~erator, a load CJrcmt. a switch ndapted to be ope10.ted to connect the generator to the load circmt, n1eans DJ 

for dnvmg said generator, means responsive to the speed of said _generator for controlbng the po,\.er of S1Ud d.r1v1ng means, and 

means re~ns1ve to predetermmed electrical cond1bons of said generator and load rir- lull 

cmt for controlhng said speed responsive 

means arranged to affect the power of sRJd 

lt'!nerator dr1v1ng means to m.untam the 

electrical condition of tl1e i!!'enrrator sul>Stan· 

bally equal to that of the load en cmt while lUj 

the smtch is open and to mc1-ea<ct> the }>O\\er 

of snid dr1vmg means when 1111ul p.-edPter1mned electncal r.ond1bons are eqnnl whereby upon closmg said switch the DO\Ver-of said 

driving means will be mcreased to cause the 110 

generator to take oh load 

5 In combmat1on, an alternatmg current 

system an alternator adapted to be connectt•d 

thereto, a prime mover for said alternato1 

and an automatic speed and load conb"Olhng l lJ 

arrangement for said prime mover compr1smg means responsive to the rel11tive f1-equenCJes of said system and alternator for controlling the supply of energy to s1ud pr nne mover 

so that with said alt.en1ator d1ti-connected J.!D 

from sBld system said altf'rnato1 pao;ses 

slowly throu1th synchi"Omsm and '"hen sn1d 

alternator is connected to said s;> stem the sn pply of 8llergy to said pnme mmer 1s o.11toinat1cally mcreased to a predetermmed value J.!i 

whereby said alternator takes on load 

6 In. comb1nabon, an alternatmg current 

system, an alternator adapted to be connected 

to said 11l'5tem, 1:ln:v1Dg means for sftld nlte1 - Dator anil an automatic load conti"Ollmg .u- 130 
• REF ID:A67801 • 

4 1,888,119 

rangement for said dnving means compns- when the speed of said mat mentioned eJa.. ~ means responuve. to the relative frect!len- ment is less than the speed of the other elecies of said system and alternator for effect- ment. m~ an increastr m the supply of enerp to 10 In combination, an alternatmg current 

1 said dnv1ng means 'vhen the frequenmes of system, an alternator adapted to be connected TO 

the alternator and the system are tf1e same to said system, a prime mover for driving Bild 

7 In combination, an alternating current alternator, a governor mechanism for said 

systemJ an alternator adapted to be connected pnme mover, and means for electmg a. ~ 

to said system, a. pnme mover drivmg Sllld determmed setting of 88.ld governor mecha.-

10 generator and an automatic speed regulo.ting nism after S1Ud alternator is connected to Tl 

arrangement .for sBld prime mover compns- SBld system compnsmg :frequency ~ve 

ing a plurahtY. of elements, means for driv- means arranged. to ch&Dge the setting of said 

• 1ng one of'said elements at a speed pFOpor- governor michamsm so as to increase the 

tional to the frequency of said alternator, amount of energy supplied to sBld prlDle 

11 means for dl'l' mg another of said elements mover when the trequenCJ.ea' of alternator a.n.d P 

at o. speed proportional to-the frequency: of system a.re the same. 

mud s1stem, sBld elements being arranged. to 11 In combmation, an alterna.~ current 

be dnven at the same speed by their respec- system, a.Ii alternator adapted to be connecttlve drm.ng means when the frequency- of ed to S&ld system, a pnme mover for dnvmg 

10 said alternator exceeds the frequency: of sud said alternator, a governor for said pnme BS 

system a predetermmed amount, and means mover, a synchronizmg motor adapted to conrespo11S1ve to the relati' e speeds of Bild ele- trol 'tlie set~ of saia governor, and means 

ments for controlling the supply of energy for controlhng the operation of 1

S&J.d motor 

to sBld prune mover so that said alternator compnsmg an element arra.nnd to be dnven 

'13 passes sfowly'througlr'synchron1s1n - 11.li a speed proportional to tlie frequency of 10 

8 In combination, an alternatmg current said alternator, another element a.rranaed to ~stem, an alternator adapted to be conneated be dnven at a llpeed pro~ortional to tlle fre- - to stud system, a prime mover dnymg said al- qnency" of saids~, said elements be~ arternator and an automatic speed regulating ran~d to be driven at the same speed when 

30 aiTangement for said prime mover compns- the frequency of S1J.d alternator eXceeds the 111 

ing an element arr.an~ to be dnven at a frequency of 88.ld system~ predetermmed 

speed proportional to the freqaency of &Bid amount, and means eontrolled by said elea.lternator, another -element arranged. to be ments for completmg a Cll'CUJ.t f<~r said motor 

dnven at a speed proportional to the fre- t0ica.use it to vary thi setting of S&ld governor 

.u quencv of s&1d system, said elements being ar- so as to mcrease the supply of energy to B1Ud 100 

ranged to be driven at the same SPeed by their prune mover when the SC of B1J.d first men-

·respecbve dnvmg ltleans when the frequency: boned element is less the speed of the 

of said alternator exceeds the frequency of other element and for eompletuqr a Cll"Cmt for 

sBld system a predeternuned amount, and Bild.motor to cause it to vary thC9 setting of '° means controlled by said elements for 86ect- said governor so as to decrease the nppJt of IOI 

inJ an mcrease in the amount of energy sup- energy to said J>nme mover when. the speeci of 

plied to S1J.d prune mover when the speed of said first mentioned element mi:ceeds the speed 

.saJd first mentioned: element 1S leas than the of the other element 

s_peed of s&1d second mentioned element and a 12. In combmation, an alternatmg current 

'I dectease m the amount of energy supphed ~' an alternator adapted to be connected 110 

to sB1d pnme mover when the speed of said tosaidsystem,a.prim.emoverfordrivmg-aid 

first mentioned element lS ~ter than tl!e alternator, a governor for Bild prune mover, 

speed of said second mentioned element. a synchromzmg motor adapted to control the 

9 In combina~tion, an altern"ating current .sett.mg of S&ld-govern~ and means for conao system, an alf'A>rnator adapted to be connected trolling the operation of SI.Id motor compns- 111 

to said system, a prime mover driving ~id al- mg an element ar~ to be driven at a 

temator and an automatic load con~rollmg speed propo~onal to the frequency of said 

arrangement for said pnme mover compns- alternator, another element~ to be 

mg an element arranged to be dnven at a dnven at a~ proportional to the .fn.. 

11 speed proportional to the frequency of stud qu~of8&ld~saidelementsbem.rar- 120 

altemator, another element arranged to be ran to be dnven at the same speed, -When 

driven at a ~eed proportional to the fre- the requency of sud alternator exceeds the 

quenci of said system, said elements bemfi:"- frequen~ of said S}'Stem. a ~etermmed 

ranged ta be dnven at the same spe~d by r amount, means controlled by 11aid elements for 

au respective dnung me-.ns 'vhen the frequency- eompl.etu!g a circuit for said motor to cause it 1!3 

af said alternator exceeds the frequency of to vary the setting of 1&1d governor so as to 

said system s. _eredetermined amount, and increase the supply 1of energy to said prime 

meanscontrolleel by said elements.for effecting mover when th.8 speed of said first mentioned 

an increase m the amount of ener~ supplied element lB less than the speed of the o~er eleu to said pnme movm= to a predetermined value ment a.nd for completmg aCll'CUlfi for a.Id.mo- 180 

\ 

.. .. 
• 

.. 

• REF ID:A67801 

1,881,111 

tor t.o cause it t.o vary the setting of said governor so as to decrease the supply of energy 

t.o said prune mover when the speed of sa1a 

first mentioned element exceeds the speed of 

I the other elemmat, and means arranged t.o be 

operated when the governor has a predet.ermmed aettmg t.o prevent BILld controllmg 

' 

means from changmg the set~ of the governor so as t.o increase the supply of energy t.o 

said prune mover 

In "1tness whereof, I have hereunt.o set my hand .tlus 27th day of Ja.nuary, 1927. 

HAROLD T. SEELEY. 

10 
• 

Jan. 15, 1929. 

+ // 

REF ID:A67801 • 

H T SEELEY 

CONTROL SYSTBM 

Filed Jan 31, 1927 

1,699,122 

Inventor 

HaroldTSeeley 

by ~~·'= .J.::;.r; &;" 

His Attorney 

. ...