US1251294A

US1251294A - Switching apparatus.

Info

Publication number: US1251294A
Authority: US
Inventors: William M Scott
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-06-22
Filing date: 1915-06-22
Publication date: 1917-12-25
Anticipated expiration: 1934-12-25

Description

W. M. SCOTT.

SWITCHING APPARATUS.

APPLICATION FILED JUNE 22.1915.

Patented Dec. 25, 1917.

5 SHEETSSHEET I.

W. M, SCOTT..

SWITCHING APPARATUS.

-APPL1CATION FILED JUNE 22.1915.

Patented Dec. 25,1917.-

5 SHEET$SHEET 2- Z; Mot/W W. M. SCOTT.

SWITCHING APPARATUS.

' APPLICATION FILED JUNE 22.1915.

Patented Dec. 25. 1917.

S'SHEETS-SHEU 3.

Fig.7. B

W. M. SCOTT.

swncume APPARATUS.

APPLICATION FILED JUNE 22, 1915- 1,251,294. I "Patented Deb.25.1917.

5 SHEETSSHEET 4.

W. M. SCOTT.

's wncum'e APPARATUS.

APPLICATION FILED JUNE 22| I915- Patented Dec. 25, 1917.

'5 SHEETS-SHEET 5- -sEsT AVAILABLE com wmnm u. soon", or rannrrrnna rownsmr, CHESTER COUNTY, PENNSYLVANIA.

SWITCHING APPARATUS.

Application filed June 22, 1915. Serial No. 35,700.

To all whom it may concern:

Be it known that I, WILLIAM M. Soon, a citizen of the United States, residing at Tredytfrin township, in thecounty of Chester and State ofgPennsylva'nia, have invented a new and useful Switching Apparatus, of which the following'is a specification.

My invention relatesto electrical control apparatus, and particularly to apparatus for switching or controllin heavy electric currents such as used in e ectriclighting and electric power-practice;

My invention resides in a system compris ing a plurality of switches orcircnit breakers which may be operated either manually or by power, with suitable means for insuring that they shall not simultaneously be in normal, generally closed position but allowing all to be in abnorma generally open, position, such means comprisin suitable electrical and mechanical interl'oc trols hereinafter described.

'Inanother of its aspects my invention comprises such switches or circuit breakers with means insuringlthat the switches or breakers of a given circuit shall be closed only in a predetennined-sequence.

In another of its aspects my invention com llrises a plurality of witches or circuit brea ers with each or each group of which is associated an additional switch or circuit breaker, with means insuring that these ad ditional switches or circuit breakers shall never be simultaneously in normal, generally closed, position, but allowing them to be simultaneously in abnormal, generally open, position; and means for tripping or opening either or any of such additional switches or .breakeis which in opening cause the tripping or o ening of the'other switches or circuit .brea ers; and also in means associated with the operating mechanism for these additional switches or circuit breakers for releasing or rendering operable the operating mechanisms of the other switches or breakers.

As to another of its aspects my invention resides in switching mechanism for connecting a generator with either of a plurality of circuits or sets of buses, with an equalizer switch for each'circuit or set of buses, which equalizer switches are prevented from being simultaneously closed, though all may be open, together with means allowing only that switching mechanism to close circuit with a circuit or set of buses when the cor- I Specification of Letters Patent.

or con- Patented Dec.25,1917.

responding equalizer switch has been closed; and in such a system mean insuring opening of all the switches or circuit breakers when either equalizer switch opens.

My invention resides also in circuit arrangements and connectitons for controlling apparatus such as above referred to.

My invention resides also in other features-hereinafter described and claimed.

For an illustration of some of the forms my invention may take, reference is to be had in the accompanying drawings, in which: f a

'Figure 1 is a side elevational view of two equalizer switche /or breakers and their op erating mechanism.

Fig. 2 is a side elevational view, on enlarged scale, of part of the tripping mechanism.

Fig. '3 is a side elevational view, on enlarged scale, of a part of similar trippin mechanism.

Fig. {2 is aside elevational View, on enlargcd scale, of manual operating mechanism illustrated in F ig. 1. r

Fig. 5 is a side elevational view ofa modification of similar manual operating mechanism.

Fig. 6 is a side elevational view, with motor operating means omitted, of the main switches or circuit breakers.

Fig. 7 is a front elevational viewof a complete set of switching mechanism with their drivii'ig motors.

Fig". 8 is a top plan view of the operating mechanisms for the equalizer switches and for one set of main'switches- Fig. 9 is a side elevational view, partly in vertical section, of apparatus shown in Fig. 8. A

Fig. 10 is a fragmentary side elevational view of-part ofthe actuating mechanism.

Fig. 11 is a fragmentary side elevational view illustrating means for preventing engagement of'a. worm with its gear under certain circumstances.

' Fig. 12 is a fragmentary view illustrating structure of the localizing switch.

F ig. 13 is a fragmentary view illustrating structure of a motor control switch.

Fig. 14 is a diagrammatic view of circuit arrangements for effecting the various controls.

Fig.1?) is a fragmentary view illustrating means for locking thc' i'i'peratorfs control switch. v

Fig. .16 is a view, partly in, isect-ion-and --tggle 01' other mechanism 7 comprising the QRQF QHgz'lMr2 1 :152] e fialra or nq hsxk ilngw 'mfi'nfl. u i iwith thefpositlve an negat yg busegs; 4

uni-this system n eans 9. The latch lO serves l0 lock the switch in ilef erring first to Fig. 14'f0r.z n,;bP-i6i (le.-s-. blimsflbifmsition, and hitch actuating mechacr1pt1pn of one of the appl cations of mynausm 11 serves to trip the latch. The hitch 1m gumg(j qprgsem amgmpoundmmundx1meumningeniechunisms 11 of tliulfimeiilfii gl direct current enerat-or havin' the arm:;-

3 t it at any such time p'nly tbe pmpemassq-i ted; mme 'w m i wtsz e no er slmexibefcl sefil Referring now 0.

pand Em,

.11! 5 z Fag theaeqnahzer are, shown disp0$eSl One yerti cgmllyabwgizthfimther upon ,the b38810! switchboard 1 of niarble or other suitable e gs mny be 9i ziny suitableystructure and is hege shmvn to; lcqmprise the stationary mai n Zgn go; 4; r|(l. 'b -i;(lge, the. tg-rininn, 13.;2 mull -is :t he movable laminated CODULCK member 5 pleated in the housing 6 and operated by snitablo' L 'g timl together b) the ['(Ni imultnneous actuation by the. tripping mng r lgthg a rmgjupe 14 cggnn ecl glhy' hn qjli'e igigfinipbifill (l he g gn; Inch (ll-lye thyn gh -u in t h yqn n; into mesh with its gear it ;;;ct.nmtes lzi'lemlly111mmhle- -pinE50 nm'ihh'llv helirl in I its=dmt-rali msilionfilly-1n s in in shmv nii n 1 F311;. 1115;; the-spring l. i'rl ispi is'ci-l between the washers 51 each shdable, re-

spectively, alongthe pin 50, with theresult that when the pin is moved longitudi nally, one or the other of the washers 51" will engage one or the other of the housings G and compress the spring, which, after re-' lease oft he pin 50, will expand'and restore the pin 50 1 to its normal mid-position. When the gear 2(3'is rotated by the motor driven worm 24 the'end 52 of the "pin 50 is shifted laterally by. the'cam 46 thus thrusting theiother-end"53 of the pin 50 into the path of travel of the square'end of the projection 48 thus positively preventing the rotation oft'hegear 27; and similarly, when the gear'27 is rotated the end 53 of the pin .50 is. shifted. laterally by the cam 4:9 tobring the end 52 in front of the shoulder 47' to positively prevent rotation of gear A pin Sifisfcarried by the gear 26 and is adapted \to engage the underside ofthe lever 55' pivoted at 37 to lift the lever 55 ant the rod 56 attached .thereto and extending over to the operating mechanism of the breaker A. Similarly a pin 57 is carried by the gear 27 and is adapted to engage the under side of thelever. 58 pivoted at 3'7 and attachedto the'r'od ,59 extending across to" the .foperating mechanism of the breaker B. 7 p Pivoted tothe upper end of the shaft of each of the worms 24 and 25, 'as well as the wormsassociated with the breakers 'A, A, :B and B, is a. link 60., Fig. 1, for shifting the movable contact 61 of the localizing switch away from the stationary contact 62 and into engagement with the stationary contact 63. As shown in]? i 12;the movable cont'acttil may be in e ect two yielding buttons ,61 adapted to'engage respectiyely the

stationar contacts

62 and 63.

' When a worm is .t rust into engagement with its gear the contact 61.1eaves the stationary contact 62 and engages stationary contact .63.

Operated each of the worm 'gears of each of the switches or breakers through crank 64, rod 65, and lever 66 is the movable contact 67 of amotor control snap switch cooperating with the stationary contact 68. As shown in Fig. 13 the movable contact may comprise a yielding button 67 adapted to engage the stationary contact 68, a plunger 69 being thrust in opposition to the spring 70 when the switch is closed. Each of these motor switches is closed by the opening'of the large switch or breaker which it controls and opens upon the completion of the closing movement of such large switch or breaker.

The gear locking pin 50 carries near its opposite, ends the

collars

71 and 72, shown also in Fig. 16. 'hen the gear 27 through its cam-49 shifts the pin 50 laterally to bring its end into position to prevent rotation into the path of the arm or lever 73 carried on the upper end of the shaft of the worm 2 1, preventing the worm 24 from being shifted into mesh with its gear 26 should the solenoid 39 become accidentally energized. The relation of the collar 71 and lever or arm 73 is indicated in Fig. 11. I Similarly.

I theshaft of the worm 25'carries on its upper end an arm or lever 71 into whose path the collar-721s shifted when the gear .26 rotates and by its cam 46 shifts the pin in opposite direction. to prevent shiiit ing of worm 25 into mesh with gear 27 should the solenoid 40 he accidentally or improperly energized."

InFig. (i the switches or breakers A. A" are shown in open position while the switches or breakers B and B are shown in closed position. t Each of the breakers A and A may be of any suitable structure and is here shown to comprise the stationary terminal blocks 7 5 and 76 adaptedto be engaged and bridged by the movable laminated contact members 77 ,each operatedby toggle mechanism 78' comprising the operating lever 79. The terminal '75 of the breaker A is connected to the positive bus (Z and the terminal 7 5 ofthe 'ture similar to A and A and comprise the terminal blocks 80 and 70 adapted to be engaged and bridged by the laminated bridging members 81 operatedby similar toggle mechanism including the operating levers The terminal 80 of the breaker B is connected to the positive bus 7 and the 'terminal 80 ofbreaker B is connected to negathe bus g. The lower mainterminals 76 of breakers A and B are one continuousconductor, as are also the lower terminals 76' of breakersA and B. y

1 Each of the circuit breakers, A, B, A and B is provided with a latch or dog 83 for 'restraining it in the circuit. closing position. The vertically extending

bars

86 and 86 together with the respective pairs of bell crank levers 95, 95". and 95", 95" intcrcon- I nect the latch actuators 84 and S5 in the manner hereinafter described so that the opening of either upper breaker will cause the opening of the corresponding lower and by the resulting movement i-mnmunii-ated through the corrcspoluling boll crank

invers

95 or 95" and the assoc ated verticalr se at 86 will also .trip whichever of the lower switche -or eireuit hreakers i's closed. The bar 85 connecting the latch. actuators adapted to be actuated by the 'aimeture'88? jf. stage-venom magnet ih'di ciited at '37 in:

Fi;1,1-,. r throughrod 895 f the reverse enefrgy flow tripping magnet comprising the 'shiint coils" 190 cooperating \vith "the magnet 91 "energized the floix iingthrough this. reverse-e ',Referring toiF gs l, 3 and" 7, th're is the lower stud 92 co cting withlthe lower i i i r i brealzersor switches. ntsihe eurrent coil of v w of ripping me-chatenism andtheshiin't erpotenti-alfccils-are ind j lated a- 9'0.

pavemen 94611 the hoiising. 6 6f upp and lower equalizer switches-E and E bel l be struck as the's w tch E or, E1 6 mumcities move entto' the bar 97 which extends across to the breakers A "or A Fig. 7 g and is there adafted to actuate th'egbell through it the bar 84 or the'bar'ss, depending up-en which of the breikersE-or E doses, to trip any of the blr'eakers A o'rfB,'B"whieh may be closed. These 'pai s areshowp in Fig. 2 "and Fig, 3. j Th'ereIis a lever {95' at the left of "each of. the breakers A, A' 'and similar lever 95" at the right of e aeho'f the breaker B,B

" The "lower 4 b l sel vers e nested together fend pivoted theve'rticflal.

. mass-g .leversf95'? arse-centered in an ideatransmit a movement through the rod 86 or s 86 -to actuate the latch actuators of the up per'breakers to trip them. 4 The main switches, A, A are actuated by the motor M, and the breakers or switches B and B areactuated by the motor M, Fig.7.

Pivot'ed at 98'to' the operating lever 79 of breaker A' is a vertically extending rod 99 connected to :1 crank upon the worm gear 100; and pivoted to the operating lever 79 v of the lower breaker A is a vertically extending rod 101 connected to a crank driven by worm gear-102. Similarly, the operating lever of the upper breaker B is connected by rod wit-with a crank on worm g'earl04; and the operating lever of the .lower'breaker It is connected byrod 105 with a crank Asshown in F 1g. 8,-the motor M drives the gear 107 which in turn drives the gears? 10S and 10!) driving-respectively the worms BEST AVAILABLE COP T Similarly the motor or drives" m ne to:

operating with 104' and 106 and controlled by solenoids 11mm! 1 15 n1e latter indicated only Fig.14," Each of the four worms andw'orm gears for the breakers A,

A, B and B is normally locked by a hooked lev r 116a's indicated in Figs.,.s and '10;

, a; The lever 116 has a home-1 7' engaging a member the npp'erend of th'shaftilm preventing thewo'rin'11O beingshifted into mesh with are gets 1110;:ihd the e er, 116 has the secbndhsiok 1. 18 engagingtheqhg .119 oh thegear 'l'oo pfre iit'iiig its rotation.

The hooked lever 116 'isiiii'l lfited by webm- 56 which is aetuated "the" lever 116 after predetermined eittentof ncrement of the gear 26 of ntest nes swiit'ch- 1 2,1 similarhook'edlever 124- is actuated by the "of the switch B after predetermined movemm. of the-{gear} 'zzrequnize After predetermined. insvement at. the gear 100 thepin 120thereoi I ises'thelever 121 which actuatesthe b51122 whichthereupon li ftsthe hooked lever 123 th" rel eitsethe fwo'ri'n 111 and the gear, 102 of/t-he lo vyee breaker A and v imil iily, "singer-predates mined m-evemem for-the gear 104 it tr n mitsa lifting moveiniit to' the lockihg lever 125 "to release the worm aridthe-worm gear 106fofthe breakerBK .i f 1,

Pivotd concentrically with be n of the six worm gear sand "secured thereto is a.

member 126, Fig 4, by which it may be manually actuated by'the 'r'nanually operated lever'127'," having the handlegri'p' 128 and independently pivoted to the base or housing 129. Pivoted on the operating lever 127 at 130 is the dog 131 adapted to engage the member 126. When it'is desired to manually close any one ofthe switches independently of its motor, lever 127 is raised by the operator whereupon the dog 131 will fall by gravity to vthe engagingposition shown in Fig. 4; In depressing the-lever 127 the as- SOCIHtQd' W'OIHI gearwill be actuated and thereby transmit closing movement through the connecting "rod to the. associated switch or breaker. As the closing movement' is com'pletedthe plunger 132, carried by the lever 127, and pressed forwardly by the spring 133 engages a suitable stop, as 134, Fig. 1, thereby compressing the spring 133 .as the main switch or breaker is closed.

Upon releasing the handle 128 the spring 133 expands and returns the lever 127 a short distance, whereupon the dog 131 will rosition free flOl'l} the member 126.

As a modification of this manual operating means structuresimilar (o that illustrated in Fig. 5 maybe employed. In this 1 2 tate by gravity about its pivot to a po- 7 15. falls by gravity, as allowed bythe slot 135,

BEST AVAlLABLE COPY T a in Fig. -5 the lever .127 has been raised and pushed tow'ardthe left, as allowed by the trolled respectively by the

solenoids

40, 112,

slot 135, andthe member 137 engaged in notch 136.- By down-ward movementthe associated switch; or breaker is closed. At the completion ofthemov'ement and'the removal of the operators hand the spring 133 returns the lever 127 slightly and lifts the lug 137 free of the notch 136, whereupongthe lever 127 to disengaged position.

Referringagain to Fig; 14, the localizing switches138, 139, 140, 141 and 142 are 81malar to the localizing switch 61', and are

coni

113, 114 and115, through their, worm shifta ing toggles. And the motor control switches i breakers the operator closes the switch 161 143, 144, 145,146 and 1 17 are similar'to motor control-switch 67 and are similarly actuated by the breaker actuating" mecha- The operators control switch D includes the movable contact 148, normally centered in 0 en position by the springs 149, and

whic may be moved by the handle 150 to the left to

engagecontacts

151, 152 and 153 and to the right to engage

contacts

154, 155 and 156. As shown in largerscale'in Fig. 15, the movable member of this control .switch is provided with a notch 157 in which is adapted to engage the lug 158 on the armature -159 of electro-magnet 160 when the, latter is deenergized or is subject to subnormal voltage. The magnet 160 is, however, 'sufiieiently energized tof'withdraw its armature'from the above described engagement only when subjected to the normal voltage of the generator with which it. is connected, such connectionbein made only when breakers A? and B- are 0th in the open position, in which, position they allow the clrcuit of the magnet coil to be completed through the plunger switches 172 and 183;-therefore whenever the generator G is at normal voltage and the switches A and,

B are both open the armature 159 is held attracted to unlock the movable member of i the switch D which may then be actuated by the operator.

The operation is as follows: 5

With the parts in the positions indicated,-

the motor M has closed the equalizer switch E and the motor M has closed'the main switches or breakers B, B in which relation the generator G; is connected to the buses f, qandz'-. v

If it i desired to open these switches or whereupon current will flow from the conductor 162 connecting with any suitable source of energy, through the switch 161, conductor 163, switch 164, which is-closed when the switch E is closed and which opens when E 1 opens, through conductor 165, tripping coil 13 to the'other eonduc- I tor 166 of the. supply circuit. This ener izes the trip coil 13 whereupon the breaker.

is tripped. The switch E accordingly opens and, in so doing engages the associciated head 96 of lever 95 to actuate the rod 86 which accordingly actuates the rod ated head'96 oflever which thereupon 84 of the upper breakers to trip the upperbreaker B, 4 I

In opening, the switch E1 has b end .switch 164 and also switches 167 and f168 and has closed switch 169. In opening,

switch B has opened switches 170 and'171. v In opening, switch B has allowed closure of switch 172, andhas opened

switches

173 and 174.

and 177 are opened, and switch 178 is closed. When .switch A opens

switches

179 and 180 are opened. -When switch A opens

switches

181 and 182 are opened, andswitch 183 isclosed. i

. I 90 When switch E opens, switches 175, 176' 4 ,Switches. 172 andl83 are in series with. I eachctherfand resistance 160. and the locking magnetlGOwhich can therefore be ener gized only ,'-when both switches A and B areopenJ inE-whieh case the coil 160 is connected across the terminals of the generator G, which if ati qnormal voltage, sufliciently energizes the rnagnet l 60 to unlock the operators lever 150. "-In"'other words, the oper-- both switches-A and'B arelopen and when the generator G is operative at normal volt- .I f, now, it is desired to connect thegere erator G'with the buses d' and e, the op'erthe motor M to conductor 166. This energizes the solenoid 39 and starts the motor 'M which rotates the worm 24 which is shifted into mesh with gear 26 by the solenoid 39. As the worm 24 is shifted into mesh with its gear, the localizingswitch 61 is transferred to contact-63, making connection with conductor 162 independently of the operators switch, which now loses control of the motor The gear 26 is accord- 105 ators switch D can bec;opemt dc l when e i opened.

ing of the switch 169', together with the 010- sure of the switch 164, controlling the circuit of the'tripping magnet 13.- I c As the switch E reaches closed position the localizing switch 1381s restored tonormal position and the motor switch 143 is During this closing movement the gear'27 has actuated the pin 50 to lock the gear 26 and to prevent operation of worml24 by its solenoid 39. .And during this closing movement of switch E the gear 27 after predetermined movementthereof causes pin 57 to lift lever 58'to actuate rod 59 extending over to the operating mechanism of brea er B where it lifts 'the hooked lever 124 to unlock the gear 104 and its associated worm.

As the contact 148: engages contact 155 current will flow from the conductor 162 through these contacts and through conductor191 through the now closed switch 168, I

conductor 192 through the localizin switch 141, so1enoid 114, and motor contro switch 146, which has been previously closedbythe opening of breaker 'B, and through motor M to conductor 166, energizing the solenoid 114 and motor M causing the. gear 104 to be driven'byits worm to actuate the rod 103 to close the positive pole breaker B. As breaker Bis closed switches 170 and 171 are closed.

After predetermined. movement of gear 104 in closing breaker B a pin thereon, similar to pin 120 of gear 100, actuates a lever similar to lever 121 to actuate a rod similar to rod 122-to raise the locking lever 125 to free thegear 106 and its associated worm.

Upon further movement of the operators lever to bring contact 148 into engagement with contact 156,. current flows through these contacts from conductor 162 and thence through conductor 193, switch 170, conductor 194, through the localizing switch 142, solenoid 115, motor switch 147, which latter has been closed. bythe opening movement of breaker B, and thence through motor M to conductor 166,, energizing the solenoid 115 and motor W to cause gear 106 to be driven by its worm for actuating rod 105 to close the breaker B. The 0perators switch D then returns to normal position under influence of the springs 149 557 AVAILABLE coPi 7 by switch 172 opened by the closure of switch B Briefly stated, an equalizer switch must first be; closed, then the positive andnegative switches or breakers of apair are closed in the order named; and as the. equalizer 'switch' is closed, the other equalizer switch is prevented from closure by the pin 50 and

collar

71 or 72 preventing rotation. of the operating gear for the other e ua'lizer 'SWltCh and preventing operation of t e associated worm; and theoperating mechanism of the positive main breaker remains locked, by locking its gear and worth whichare unlocked after predetermined movement of the equalizer switch gear; and after predetermined movement of the main positive switch operating gear the gear and its associated worm forthe negative breaker of the pair are unlocked. 1n additionto these mechanical features, the closure of anvequalizer' switch 'is accompanied by the opening of a switch in the control circuit of the other equalizer switch, preventing energization of the worm shifting solenoid and the closure of the equalizer switch is accom 'conductor 196,. switch 175, conductor 197,

to conductor 166. The glowing of the lamp L therefore indicates the closure of the equalizer switch E. hen the main positive breaker A is closed a circuit is closed from conductor 162,thrcugh resistance 198, lamp L, conductor 199, switch 180, conductor 200, to conductor 166 causing the lamp L 10 glow and indicate closure of main positive breaker A. When breaker A- .is closed a circuit is closed from conductor 162 throughreSistance 201, lamp L conductor 202, switch 181 to conductor 166 causing lamp L to glow and indicate closure of breaker A WVhen equalizer'switch E is closed, a circuit is closed from conductor 162, through resistance 195, lamp L, conductor 203, switch 167 and conductor 204 206 to conductor 166 causing the lamp L to glow and thereby indicate closure ofbreaker From the positive terminal of the generator G there is a circuit through the conductor 209, resistance 210, lamp L, conductor 211, to-the negative terminal of thegenerator G, with the result that the lamp L glows whenthe generator is alive or operative and indicates that condition What I claim is: l

1.' The cor'nbination with a plurality of main switches, of a motor, a disengageable mechanical connection between saidmotor and each of said main switches for moving the same to normal position, a pair of motor control switches for each of said ,main switches, one control switch of each of said pairs closed when one of said main switches is in abnormal position, and the second control switch of a pair connected in series with the other control switch of the pair and closed when another of said main switches is in abnormal position, whereby said motor cannot be'energized to actuate one of said main switches to normal position when another of said main switches is in normal position;

2 The combination with a plurality of main switches, of a motor, a disengageable mechanical connection between said motor and each of said main switches for moving the sameto normal position, a pair of motor control switches for each of said main switches, one control switch of each of said pairs closed when one of said main switches is in abnormal position, the second control switch ofa pair connected in series with the other control switch of the pair and closed when another of said main switches isin abnormal position, whereby said motor can not be energized to actuate one of said main switches to normal position when another of said main switches is in normal position, and a coil controlling said disengageable mechanical connection and controlled by a pair of said control Eswitches.

3. The combination with a plurality of' main switches, of a motor, a disengageahle mechanical connection between said motor and each of said main switches for moving the same to normal position, a pair of, motor control switches for each of said main switches, one control switch of each of saidpairs closed when one of said main switches is in abnormal position, the second control switch of a pair connected in series with the other control switch of the pair and closed when another of said main switches is in abnorinal position, whereby said motor cannot be energized to actuate one of said main switches to normal position when another of said main switches is in normal position, and an operators switch having a plurality of positions in each of which it controls said motor through one of saidpairs of.

motor control switches.

4. The combination with a plurality of main switches, of a inotor,'a disengageable mechanical connection between said motor and each of said main switches for moving the same to normal position, a pair of motor control switches for each of said main switches, one control switch of each of-said pairs closed when one of said main switches is in abnormal position, the second control switch of a pair connected in series with the other control switch of'the pair and closed when another of. said main switches is in abnormal position, whereby said motor cannot be energized to actuate one of said for driving each of said switches and adapted to be driven by said worm, means for actuating said worm into engagement with its' gear, and means actuated by one of said gears for preventing engagement of a worm with another of said gears.

6. The combination with a plurality of switches, of a motor, a worm for each of' said switches driven by. said motor, a gear for driving each of said switches and adapted to be drivenby said worm, means for actuating said worm into engagement with its gear, means actuated by one of said gearsfor preventing engagement of a worm i with another of said gears, and a member preventing engagement of a worm with its gear when another worm is movedby said worm actuating means into engagement with its gear.

- 7. The combination with a plurality of switches, of a motor, a worm for each of said switches driven by said motor, a gear for driving each of 1 said switches and adapted to be driven by said worm, means for actuating said worm into engagement with its gear, means actuated by a gear when driven by its worm for preventing engagement of another worm with its gear andfor preventing movement of said last named gear, and a member preventing engagement of a worm with its gear when another worm is moved by said worm actuating means into engagement with its gear.

8.The combination with a plurality of switches, of a motor, a disengageable mechanical connection intervening between each of said switches and said motor, said disengage'able mechanical connection comprising driving and driven members, and means actuated by one of said driven membersfor reventing movement of another of said riven members.

9. The combination with a plurality of switches, of a motor, a disengageable mechanical connection intervening between each 'of said switches and said motor, said disengage'able mechanical connection comprising driving anddriven members, and means actuated the driven member of. one of said disengageable mechanical connections 'for preventingengagement between the driv ing and driven membersof another disengageable mechanical connection.

actuated by'the driven memberof one of said disengageable mechanical connections for preventing movement of the driven member and for preventing'engagement between the said driven member and the driving member of another .of said disengageable mechanical connections.

11. The combination with a plurality of switches, of aimotor, a disengageable mechanical connection intervening between each of said switches and said, motor, said disengageable mechanical connection comprising driving and driven members, means actuated by one of said driven members for, preventing movement of another of said driven members, and a member preventing simultaneous enga'gernent'of the driving members with their driven members of said disengageable mechanical connections.-

12. The combination with a. pluralityof switches, of a motor, a disengageable mechanical connection intervening between each of said switches and said motor, said disenga eable mechanical connection comprising driving and driven members, means actuated by the driven member of one of said disengageable mechanical connections for preventing engagement between the driving and driven members of another disengageable mechanical connection,and a member preventing simultaneous engagement of the driving members with their driven members of said disengageable mechanical connections.

13. The combination with, a plurality of switches, of a motor. a disengageable mechanical connection intervening between each of said switches and said motor, said disengageable mechanical connection comprising driving and driven members, means actuated the driven member of. one of said disengageable mechanical connections for preventing movement of the driven member and for preventing engagement between the said driven member and the driving member of another of said disengageable mechanical BEST AVAlLABLE com ,9

connections, and a member preventing simultaneous engagement of the driving members with'their driven members of said disengageable mechanical connections.

14.-The combination with a plurality of switches, a motor, a disengageable mechanical connection intervening between each of said switches and said motor, said disengageable mechanical connection comprising a worm gear and a worm movable with respect to each other, and means actuated by a worm gear for preventing rotation of a worm gear of another of said disengageable mechanical connections.

15. The combination with a" plurality of switches,-a motor, a disengageable mechanical connection intervening between each of said switches and said motor, said disengageable mechanical connection comprising a worm gear and a worm movable with respect to each other, and means actuated by a' worm gear, for preventing engagement between the worm andgear of another of said disengageable mechanical connect-ions.

16.'The combination witha plurality of switches, a. motor, a disengageable mechanical connection intervening between each of saidswitches and said motor, said disengageable mechanical connection comprising a worm gear and a. worm movable with respect to each other, and means actuated by a worm gear for preventing rotation of the worm gear and for preventing engagement therewith of the worm of another of said disengageable mechanical connections.

17.'The combination with a plurality of switches, a motor, a disengageable mechanical connection intervening between each of saidswitches and said1motor, said disengageable mechanical connection comprising a worm gear and a worm movable with respect to each other, means actuated by a worm gear for preventingrotatiou of a worm gear of another of said disengageable mechanical connections, and a member preventing simultaneous engagement of the worms with their worm gears of said disengageable mechanical connections.

18. The combination with a plurality of switches, a motor, a disengageable mechani cal connection intervening between each. of

said switches and said motor, said disengageable mechanical connection comprising twcenthc worm and gear of another of said disengageable mechanical connections, and a member preventing simultaneous engagement of the worms with their worm gears of said disengageable mechanical connec-i tions.

19. The combination with a plurality of switches, a motor, a disengagcable mechanr cal connection intervening between each of gageable mechanical connection comprising switches, a motor, adisengag'eable mechanical connection intervening-between each of said switches and said motor, said disena worm and aworm gear movable with respect to each other, a member movable to position to prevent rotation of a worm gear,

and a cam driven by another of said worm gear for actuating said member.

'21. The combination with a plurality of switches, a motor, a disengageable mechani-' cal connection intervening between each-of said switches and said 'motor, said disengageable mechanical connection comprising a worm and a wormgear movable with re spect to each other, a member movable to position to prevent movement of a worm into engagement with its worm gear, and a cam on another of'said' worm gears for actuating said member.

22. The combination with a pluralityof switches,'a motor, a disengageable mechanical eonnection'intervening between each of said switches and said motor, said disengageable mechanical connection comprising a Worm and a worm gear :movable with respect to each other, a memberfmovable' to position to prevent rotation of a worm gear, a cam driven by another ofsaid'worin gears for actu'atin said member, and means for returning said member to normal position.

23. The combination with a plurality of switches, a motor, a disengageable m echanical connection intervening between each of said switches and said motor, said disengageable mechanical connection comprising a worm and a worm gear movable with respect to each other, a member movable to position to prevent movement of a worm into en agement with its worm gear, a cam on anot er of said worm gears for actuating said member, and means for returning sai member to normal position; 24. The combination with a plurality of switches, of a worm and a worm gear disengageable from each other for actuating each switch, a motor for driving said worms, a pivoted lever having abutment engaging the worm and its gear for holding said worm from engagement with its gear and holding said gear against rotation, and means actut'herefor', the actuating 1,251,294 I BESTVAVAILABLE c'oPi ated by another of the gears for actuating said lever to free said worm and its gear. 25. The combination with a plurality of switches, of a worm and a worm gear disenv gageable from each other for actuating each switch, a motor for driving ,said worms, a pivoted, lever having abutments engaging the worm and itsgear for holding said worm from engagement with its gear and holding said gear against rotation, a lever connecte with said first named lever, and means upon another of said gears for actuating said last named lever. i

26. The combination with a plurality of electric switches, of actuating members member of one of said switches comprising a worm ear, a

worm for driving the same, 'a mem er for locking said worm gear against rotation,

and means actuated by the actuating member of another of said switches for actuating said locking member to release said worm gear.

27..The combination with a plurality of electric switches, of actuating members therefor, the actuating member of one of said switches compris ng a worm ear, a

locking said worm gear against rotation, and means actuated by-the actuating member of another of said switches for actuating said locking member to release said worm gear after predetermined movement of said actuating member of said other switch. a

28. The combination with a plurality of electric switches, of actuating members therefor, the actuating member of one of said'switches comprising a worm gear, a

worm for driving the same and normally disengaged therefrom, means for locking said ;worm gear against rotation and said worm in normal position, and means actuated by the actuating member of another of said worm for driving the same, a mem r for switches for actuating said locking means to free said worm and said worm gear.

29., The combination with a plurality of switches, of a worm and worm gear disen gageable from each other for actuating each switch, means for locking the worm gear of one switch against rotation, and means actuated by the worm gear of another switch for actuating said locking means to free said first named worm gear.

30. The combination with a plurality of' switches, of a worm and worm gear disengageable from each other for actuating each switch, means for locking the worm gear of one of said switches against rotation and the worm from engagement therewith, and means actuated by the worm gear of another switch for actuating said locking means to free the worm gear and worm of said one switch.

m BEST AV ILABLE COPY u 31. The combination with a plurality of switches, of movable actuating members therefor, means for locking the actuating member of one of said switches against actuation, means actuated by the actuating member of another of said switches to actuate said locking means to free said first named actuating member, and a motor for driving said actuating members.

32. The combination with'a pluralityof switches, of movable actuating members therefor, means for locking the actuating member of one of said switches against actuation, means actuated by the actuating member of another of said switches to actuate said locking means to free said first named actuating member, a motor for .driving said actuating -members, and a motor control switch closed upon completion of movement I of one of said switches by said motor to allow said motor to actuate another of said switches. a 7 a 33. The combination with a plurality of electric switches, of actuating memberstherefor, the actuating member. of one of said switches comprislng a worm gear, a worm for driving the same, a member for locking said worm gear against rotation, means actuated by the actuating member of another'of said switches for actuating said locking member to release saidworm gear,

and a motor for driving said actuating members. i

34. The combination with a plurality of i electric switches, of actuating members therefor, the actuating member of one of said switches comprising a worm gear, a

worm for driving the same, a member for locking said worm gear against rotation. means actuated by the actuating member of another of said switches for actuating said locking member to release said'worm gear, a motor, and a motor control switch closed upon completion of movement of one of said switches by said motor to allow said motor to actuate another of said switches,

35. The combination with a plurality of switches, of a worm and worm gear disengageable from each other for actuating each switch, means for locking the worm gear of one switch against rotation, means actuated by .the worm gear of another switch for. actuating said locking means to free said first named worm gear, and'a motor for driving said actuating members.

36. The combination with a plurality of switches, of a worm and worm gear disengageable from each other for actuating each switch, means for'locking the worm gearof one switch against rotation, means actuated by the worm gear of another switch for actuating said locking means to free said first named worm gear, and a motor control switch closed upon completion of movement of one of said switches by said motor to alswitches, of a worm and worm gear disengageable -from each other for actuating each switch, means for lockingthe worm gear of one of said switches against rotation and its worm from engagement therewith, means actuated by the worm gear of another switch for actuating said locking means to free the worm gear and worm of said one switch, and

amotor control switch closed upon completion of movement of one of said switches by said motor to allow said motorto actuate another of said switches.

39.'The combination with a switch, of

actuating means therefor, a plurality of switches, an actuating member for each *of said switches, means normally locking each of said actuating members against actuation, said locking means of one of said switches actuated after predetermined-movement of said actuating means of'said first named switch for freeing the actuating member of said one of said switches, said locking means of another of said switches actuated after predetermined mot ement of said actuating member of said one of said switches for free ing the actuating member of said other of said switches, a motor for actuating the actuating members of said switches, and a motor control switch closed upon completion of movement of one of said switches by sald motor to allow said motor to actuate another of said switches.

40. The combination with'a switch, of ac-' tuating means therefor, a plurality of switches, anactuating member for each of said switches, means normally locking each of said actuating membersfagainst actuation, said locking means of one of said switches actuated after predetermined movement of said actuating means of said first named switch for freeing the actuating member of said oneof said switches, said locking means of another ofsaid switches actuated after predetermined movementof said actuating member of said one of said switches for freeing the actuating member of said other of said switches, a motor for actuating. the actuating vmembers of said switches, a motor control switch closed upon means controlling said disengageable me completion of movement of one of said switches by said motor to allow said motor to actuate another of said. switches, and a second motor control switch controlling said motor closed upon movement of said first named switch by its actuating means.

41. The combination with a. switch, of ac-" tuating means therefor, a plurality of switches, an actuating member for each of said switches, means normally locking each of said actuating members against actuation, said locking means of-one of said switches actuated after predetermined movement of said actuating means of said first named switch for freeing the' actuating member of said one switch, said locking means of an other of said switches actuated after predetermined movement of said actuating member of said one of said switches for freeing the actuating member of said other of said switches, a motor for actuating the actuating members of said switches, and a motor control switch closed upon movement of said first named switch by its actuating means. i

42. The combination with a switch, of

means for actuating the same, a plurality of switches, motive means for actuating the same, a swltch controlling sald motive means foractuating one of said switches closed upon movement of said first named switch by its actuating means, and a second switch controlling said motive means for actuating another of said switches closed upon actuation of said one of said switches by. said motive means.

43. The combination with a switch, of

means for actuatin the same, a plurality of switches, a motor or actuating the same, a disengageable mechanical connection between said motor and each ofsaidswitches, a switch controlling said motor foractuating one of said switches closed upon actuation of said first named switch by its actuat-' ing means, a second switch controlling said motor for actuating another of said switches j closed upon actuation of said one of said switches by said motor, electro-responsive chanical connections, and an operators control switch controlling said electro-responsive means. a Q

44. The combination with a switch, of means for actuating the same, a plurality of switches, a motor for actuating the same, a

disengageable mechanical connection between said motor and each of said switches,

a switch controlling said motor for actuating one of said switches closed upon actuation of said first named switch by its actuating means, a second switch controlling said motor for actuating another of said switches closed upon actuation of said one of said switches by said motor, electro-responsive means controlling said disengageable mechanical connections, and an operators con- Av'AILABLE COPY trol switch controlling said electro-responsive. means and controlling said motor through said motor control switches.

45. The combination with a switch, of means for actuating the same, a plurality of switches, motive means for actuating the same, a switch controlling said motive means for actuating one of said switches closed upon movemcntof said first named switch by its actuating means, a second switch controlling said motive means for actuating another of said switches closed upon actuation of said one of said switches by said motive means, means for restraining said switches, and means for actuating said restraining means to free said switches in response to movement of said first named switch.

46. The combination with a switch, of

means for actuating the same, a plurality of switches, -motive means for actuating the same, a switch controlling said motive means for actuating one of said switches closed upon movement of said first named switch by its actuating means, a second switch controlling said motive means for actuating another of said switches closed upon actuation of said one of said switches by said motive means, means for restraining said switches in position to which actuated by said motive means, and means for actuating said restraining meansto free said switches'upon movement of said first named switch to abnormal position. a I 47. The combination with a switch, of means for actuating the same, a plurality of switches, motive means for actuating the same, a switch controlling said motive means for actuating one of said switches closed upon movement of said first named switch means for actuating the same, a plurality of switches, motive means for actuating the same, a switch controlling said motive means for actuating one of said switches closed upon movement of said first named switch by its actuating means, a second switchcontrolling said motive means for actuating another of said switches closed upon actuation of said one of said switches by said motive means, means for restraining each of said switches in normal position to which actuated by said motive means, and means for r BEST AVAILABLE COPY,

tripping the remainder of said switches when any of said switches is tripped. r

49. The combination with a switch, of

means for actuating the same, a plurality of switches, motive means for actuating the same, a switch controlling said motive means' for actuating one of said switches closed uponmovement of said first namedswitch by its actuating means, a second switch controlling "said motive',means for actuating another of said switches closed upon actuation of said one of said switches by said motive means, means for restraining each of said switches in normal position to which i actuatedb said motivemeans, means for tripping t e remainder of said switches when any of said switches is tripped, means for restraining said first named switch in v normal positionto which actuated by ts actuating means, and means responsive to movement of said first named switch to abnormal position fortripping one of said switches. z x

' 50-. The combination with a switch, of a motor for actuating the same,a switch for controlling said motor, means for locking said control switch, electro-magnetic means for actuating said locking means to free said control switch, and aswitch controlling .80 said electro-magnetic means and whose, position is determined by the position of said pjfirstnamedswitch. 51. The combination with a switch, of a.

' motor for closing the same, a switch con-- trolling said motor, means forlocking said control switch against control of said motor, ele'ctro-magnetic means controlling said locling means, and a switch controlhng said electro-ma etic means closed when said 4ofirstn'ame switch opens.

. =52. The combination. with "a pluralit of switches, of motors for closing the same, a switch. for controlling said motors, means for lockin said control switch against control of sai motors, electro-magnetic means with each ot er in the circuit of said electro Y magnetic means closed when said first named 60. switches are open'. 1 v

54. The combination with a switch, of a gear for actuating the same, a worm for actuating said gear and disenga eable therefrom, a motor fo'r'driving said worm, a manually operable member, and a disengageable connection between said manually operable member and said gear for actuating the same in one direction only.

55. The combination with a plurality of, groupsof switches, of means for preventing actuation of the switches of a group except in predetermined order of succession, and means preventing simultaneous actuation of switches of different groups to normal position.

' 56. The combination with a plurality of grou s of switches, of means preventing simu taneous actuation of switchesof different groups to normal position, means normally locking a plurality of switches in a group against actuation to normal position, and means for unlocking said switches in succession in response to previous actuation to normal position of another switch in the group.

57. The combination 'with a plurality of groups of switches, of means for looking a plurality of switches in each group against actuation to normal position, means for unlocking said switches in succession in re sponse to previous actuation of another of the switches of the group to normal position, I

and means preventing simultaneous actuation to normal position of said other of said switches of the different groups.

58.'The combination with a plurality of groups of switches, of a motor for actuating switches of difl'erent groups, mean's preventing simultaneous actuation of said switches by said motor, a motor for actuating other switches of each group, and means preventing the'actuation of the switches of a group except in a predetermined order of succession.

59. The combinationwith a lurality of cups of switches,iof means or preventmg actuation of the switches of a group except in predetermined order of succession means preventing simultaneous actuation oi switches of different groups to normal posi tion,i means for locking said last named switches in normal position, and tripping means common thereto 'for tripping any of them which 'ma' be in normal position.

1 60. The com ination with a plurality of oupsof switches; of means for preventing actuation of the switches of a group except in predetermined order of succession,

means preventing simultaneous actuation of switches of different groups to normal position, means for locking switches in normal position, tripping means common thereto for tripping any of them which may be in normal position, means for locking the other switches of each group in normal position, and means for tripping them when the associated switch controlled by said tripping means moves to abnormal position. Y

61. The combination with a plurality of said last 7 named switches of different groups,'means preventa plurality of positions for each of said mo-.

tors for controlling the same to actuate different of said switches.

62. The combination with a plurality of groups of switches, of a motor for actuating ing simultaneous actuation of said switches by said motor, a motor for actuating other switches 'of each group, means preventing the actuation of the switches of a group except in a predetermined order of succession, an operators switch having a, plurality of positions for each of said'motors for controlling the same to actuate different of said switches, means for locking said operators switch against actuation, and electro-mag netic means controlling said locking means.

means controlling said locking means, and

63. The combination with a plurality of groups of switches, of a motor for actuating switches ofdifferent groups, means preventing simultaneous actuation of said switches by said motor, a motor for actuating other switches of each group, means preventing the actuation of the switches of a group except in a predetermined order of succession, an operators switch having a plurality'of positions for each of said motors for controlling the same to actuate diiferent ofsaid switches,"means for locking said operatorls switch against actuation, electro-magnetic a plurality of switches movable in unison respectivelywith switches in difierent groups preventing energization'of said electro-magnetic means except when said switches in different groups are in abnormalposition.

In testimony whereof I have hereunto afiixed my signature this 21st day of June, 1915. I a

' WILLIAM M; soo'rT.

BEST AVAlLABLEICOPY