US960324A

US960324A - Electric switch.

Info

Publication number: US960324A
Application number: US27678005A
Authority: US
Inventors: Edward M Hewlett
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1905-09-02
Filing date: 1905-09-02
Publication date: 1910-06-07
Anticipated expiration: 1927-06-07

Description

E. M. HEWLETT.

ELECTRIC SWITCH.

APPLICATION FILED SEPT. 2, 1905.

960,324. Patented June 7,1910.

6 SHEETS-SHEET l Witness es In ventor; fdwardMHew/ezt E. M. HEWLETT.

ELECTRIC SWITCH.

APPLICATION FILED SEPT. 2, 1905.

Patented June 7, 1910.

6 SHEETS-SHEET 2.

rm ww A n v H mm m WY d Eb Witnesses 4 E. M. HEWLETT.

ELECTRIC SWITCH.

APPLICATION FILED SEPT. 2, 1905.

Patented June 7, 1910.

6 SHEETS-SHEET 3.

Witnesses //7 vemor:

E. M. HEWLETT.

ELECTRIC SWITCH.

APPLIOATION FILED SEPT. 2, 1905.

Patented June '7, 1910.

6 SHEETS-SHEET 4 EdWdfdMHZW/Zlfi,

E. M. HEWLETT.

ELECTRIC SWITCH.

APPLIGATION FILED SEPT. 2, 1905.

960,324. Patented June 7,1910.

6 SHEETSSHEET 5.

E. M. HEWLETT.

ELECTRIC SWITGH.

APPLICATION FILED SEPT. 2, 1905.

Patented June 7, 1910.

6 SHEETS-SHEET 6.

Witnesses I from a distant point.

he run from the substation; and where a vented certain new and useful Improvemerits-in Electric Switches, of which the-fol lowing is a specification.

' then by means of transformers and rotary converters at these sub-statlons to transform I cost of the feeders.

sections instead of'the substation as has been the practice heretofore. According to ers which would be necessary were the-sys- "tem installedaccordmg to prior practice.

UNITED STATES rnran'rorricn. v

- EDWARD M. HEWLETT, or scnnunctranr, NEW roux, Assrouoarc c-nu'nimn ELECTRIC GOHPANY, A CORPORATION 0F NE'V'I ELECTRIC To all whomit may concern:

Be it known that I, EDWARD M. a citizen of Schenectady, county of Schenectady, and. State of New York, have in- The'present invention relates to electric switching apparatus andhas particular rererence to motor operated switches controlled It isusual in direct current electric-'railway distributing systems to supply alternating, current to substations located at various points along the railway line and the'alternating current to direct current at the desired voltage, finally distributing it by means of feeders to the sections of'trolley wire or third-rail to be supplied. With this arrangement a large number of feeders must large amount of energy is to be supplied this is extremely obwctwnable because of the One of the objects of thepresent invention tweenthe substation and the third-rail by runnin a single feeder from the sub-station along the right-of-way and tapping 01f from it at suitable points in order to supply the rangement it is necessary to locate theswitching mechanism for the control of the various sectionsof the third-rail in the leads between the single feeder and the thirderail my present invention these switching mech anisms are controlled individually by a single control wire running from the substation to each of the-switches. This control wire is of small size and is consequently inexpensive compared with the cost of feed Inorder to properly protect the system it is necessary that the switching mechanism employed in con unction with each of the third-rail sections should comprise a circuit breaker and switch connected in series. In operation. in case of overload the circuit is T I l a. i v oroken by the circuit creator and upon Specification of Letters Patent.

swrroir.

Patented J ne '1, 1910.

Application filed Scptember2, 19%. Serial No. 275586.

closing, the circuit breaker is closed first followed by the closing of the-switchso that if the overload is still on, the circuit may be ruptured b"tl1QCiI'CUlt breaker.

My invention comprises novel operating mechanism controlled from a distant point for operating a circuit breaker and a switch in this manner.

The invention also comprises-certain detailed features including-novel circuit connections and structural-features and details which will behest-understood upon reference to the following-detailed description taken in connection with the accompanying drawingsm In said drawings, Figure 1- is a front elevation of the switch and circuit breaker and operating mechanism previously referred to; Fig. 2 is a side elevation of the same viewed in the direction of the arrow 2 in Fig. 1; Fig. 3 is a similar view taken in the opposite direction, as indicatedby the arrow 3 in Fig. 1; Fig. at isa plan viewof the switch and circuitbreaker operating. mechanism; Fig. 5 is a side elevationof the control switches'for the electric motor which drives the operating. mechanism; Fig. 6 is a front'elevation of the semeyFigaT is a sectional view illustrating the clutch connection between the driving motor and the operating mechanism; Figs. 8 and 9 are elevations illustrating in difierent positions the mechanism by which the switch is given a snap movement when closed; Figs.- 10, 11, 12, and 13 are diagrammatic views illustrating the different operative positions of the control switches shown in Figs. 5 and 6; Fig. 14 is a view illustrating partly in sections. control switch which is actuated by the movements ofthe circuit breaker; Fig.

isanend view of the samewith the bridging disk contact removed; Fig. 16 is a perspective viewof- -the movable element of this switch; Fig. -l'7 a section of the switchtakenon a plane indicated-by the line-17 -l? of Fig. 14;-Fig.=18-is aview illustrating in perspective theclutch conand motor driven sleeve shown in Figs. 8 and 9; and Fig. 19 is a diagram of electric circuits.

Throughout these views like characters refer to like parts.

in carrying out the invention any desired nection between the switch actuatingcrank vided with two shunt to the movable type of switch and circuit breaker may be employed, but for the urpose of the present case Ihave illustrat a switch A and circuit breaker B of standard construction.

Referring to the switch-construction, the same comprises vertically arranged contact studs 10 and 11 adapted to be bridged by a movable contact 12. The studs 10 and 11 are secured to a suitable support 13, the former passing th'rough said support and being provided wit terminal clampin nuts 14 by which electrical connection my \be made with one le of the circuit and the latter stud 11 being directly connected to a strip 15 located on the face of the sup ort 13 and connecting-jwith the correspon ing stud of the circuit breaker. The movable contact 12 is pivotally connected to the up per end of a supporting frame 16 which in. turnis pivoted at its lower end to the lower side of the stud 11 which serves as a sup-Q port. The movable contact 12 is also rocontacts 17 an 18 which are s ring mounted and adapted to engage the fixed .contacts 19 and 20 respec tivel to take the final break and remove a1 spar" g from the main stud 10 as is coin mon an well known in the art. The shung contact 20 is located between barriers 21 o fiber orother refractory insulating materialj intendedto confine the arc and protect adjacent apparatus. Movement is transmittedj I contact 12"from an actuating rod or mem er 22 through the agency of a togg le connection comprising links 23 and a pro ection 24 extending outward from thel upper end. ofthe frame 16. The rod 22 isi pivotally connected through the agency of al yoke 22 to the outer end 0 link 23 and tol the outer ends of two parallel links 25 which l are pivoted at their inner ends to bracketsj .25 -secured to the support 13. The links 25 l extendon the outside of the frame 16 and form, together with their connection at the outer en s, a cramping frame which limits the outward thrust of the toggle and otherwise assists in'the closing and opening of the switch in response to the reciprocationsg of the actuating rod 22. Astop 25, shown} in dotted'lines in Fig. 3, on the

member

16,5 engages a cooperative stop 25 formed by the 'extention of the link 23 to limit the movement of the toggle in setting the switch. a

The circuit breaker B is of similar construction and comprises in general the fixed

contacts

26 and 27 which are adapted to be bridged by the movable contact 28 carried by the supporting frame 29. The fixed contact 26 is secured directly to the support 13 and is provided at its rear withclamping nuts 30 by which electrical connection may be made with the other leg of the circuit. It is also electrically connected to a shunt contact 30 carried by a bracket 33 and havin a metal face 31 and a carbon face .32.

removable contact 34 is also secured to the upper face of the stud 26. These shunt-

contacts

34 and 30 coiiperate with

movable shunt contacts

35 and 35,respectively. Of these, the former is yieldingly mounted upon the main bridging contact 28 while the latter-is carried by an independent supporting frame. Contact 35, like its mate is provided with a metal face 36 and a,car:,. pivotally ,and yieldingly bon face 37. It is connectedv at the polnt 38, tothe upper end ofthe supporting frame 39 which in turn is pivoted concentric with the1 supporting frame 29 at \the o'nt 40. In the operation of the breaker 't parts are so arranged that the

contacts

26 and 28 first separate, then the

contacts

34 and 35 and finally the

contacts

30 and 35 The pivotal spring mounting of the contact 35" permits it to engage and disengage its coiiperating contact 30' with a wipin action and to bring the metal faces 31 an 36 into on agement when the circuit breaker is close and the final break between the carbon faces 32 and 37. The

contact supporting frames

29 and 39 are operated through: the agency of toggles operativel associated with. a cramping frame 41 w ch consists of par- "allel llinks pivotally connected at their inner ends to the frame 43 secured to the support '13 and at their outer ends to a transverse spin vThe bridging contact 128 and its supporting frame (cram ing frame,

lie wholly ,within this while the shunt contact supporting frame 39 straddles the cramping frame as clearly illustrated in F1g. 1. The toggle connection between the cramping frame 41' and the supporting frame 29 15 provided by an inward projection 46 on an operating member 47 and an outward projection 48 on the frame 29. member 47 in turn is pivotally supported on the pin 45. As clearly illustrated the parts are symmetrically disposed, the projection 46 lying between the projections 48 so that strain imparted in forcing the contacts mto engagement is taken up equally by the parallel links of the cramping frame 41. In closing the circuit breaker the outer end of the operating member 47 is moved downward and inward thereby rocking the frame 29 about its pivotal point until the bridging contact 28 is firmly seated upon the

coiipcrating studs

26 and 27. This movement Wlll be limited by the engagement of the operating member 47;.with the frame 29 and this engagement will occur just before the main toggle, formed by the projections 46 and 48, reaches dead center. The parts will be held in this position by the engagement of a latch 49,; ivotedvat 50 to the frame 29, with a projection 51 on the operating member 47.

main contact The operating transmitted from the actir' n 57' on the sleeve 58 formedintegral with the their links into a substantiall position, the stops 61 on the li one,

This latch is provided with a long rearwardly-extending tail 52 and with a push button 53 either of which ma be pressed to release the member 47 an; permit the breaker to fly open under the action of gravity. The toggle connection between the crampin frame 41 and the auxiliary supporting i rame 39 comprises a pair of toggles located one on each sideof the cramping frame and extending between the point 45 on the crampingframe and the point .54 on the supporting frame39; Each toggle is composed of links 55 and-56.. Movement is i gmember47 to oulders 56 and these toggles by means'of member 47 and the coti'perating shoulders 59 and 60 on the links 56. Upon the downward movement of the member 47 the shoule ders 57 and 59 are brought into'engagement and the toggles forced so'as to bring right line s 56 engaging the projections 62'on the links 55.to ar.- rest the toggles in a slightly overset position. From this it will be seen that when the breaker is moved toopen position the main toggle, formed by: the projections 46 and 48, will first begin to move' and the bridging contact 28 will have moved .a considerable distance from the

studs

26 and 27 of the latch 49. When this latch is trippe the circuit will be broken and the parts will which the circuit breaker is connected, the

arts are.

assume the positionillustrated in Fig. 2. For the purpose of automatically actuating the latch upon anoverload in the circuit in hams-i3, towhich some of the connected, iscompo'sed of iron an forms a magnetic turn about the stud 27 ,and the lower end of the bridging contact 28., so as to be threaded by the circuitwhich extends from the contact stud 10, through the bridging contact 12 of the switch, contact 11, strip 15, circuit breaker contact 27, bridging contact'28 to stud 26. This frame 43 forms a U-shaped core which is provided with a weighted armature 63 pivoted to the lower end of one of its legs at 64 and adapted to be drawn upward into engagement with the tail 52 of the latch 49. Through the agenc of a calibrating screw 65 extending throug anopening in a projection 66 from the other to trip at any-desired ovrload. An auxil-.

The switch and circuit breaker construc tion thus far described is in its essentials old and in itself constitutes no part of the present invention.

In the usual construction of circuit breaker the member 47 is manually operated to close the breaker. In the present instance this -closing"movement isobtained by means of the actuating rodor i nember 70 and the intermediate member i'l which is pivoted at its outer end to the: member 70 and at its inner end to the actuating member 47. In the operation of these parts the upward movement-of the rod 70 has no ellect upon the actuating member 47 but through the agency of the engaging shoulders 72 and 73 on the

members

71 and 47 respectively, its downward movement establishes a positive mechanical connection which is instrumental in giving the member 47 the movement necessary to set the breaker. The lower ends of the

rods

22 and 70 terminate in curved connecting

members

74 and 75, which are secured to cranks 7 6 and 77 respectively, carried on the shaft 78 of the operating mechanism. This shaft is suitably journaled in a supporting frame 79 upon which is located the actuating motor 80. This motor may be of any desired type but preferably is an electric motor. It is operatively connected to the shaft 78 by suitable gearing, in the present instance comprising a worm 81 and worm-wheel 82 inclosed in suitable casing 83 carriedhy the frame 79. In the operation of the mechanism the

cranks

76 and 77 are given a to and fro movement by the motor through substantially 180. This necessitates the reversal of the motor and in order co-give the same time tospeed up upon reversal and build up a counter electrcmotive forcesuiiicient to prevent serious sparking at the brushes a yielding mechanical connection is provided between two sections of the motor shaft. This connection is illustrated in detail in Fig. 7 where the sections 84 and 85 of the motor shaft have keyed to their adjacent ends the

cylindrical members

86 and 87, respectively. These members are formed so as to leave a chamber for a coiled spring 88. which is connected at-its o posite ends to the

members

86 and 87. In the operation of this clutch when the motor driven section of the shaft is rotatedthe energy is first consumed in windin up the spring 88 until it I isd. awn or force into engagement with the leg of the frame 43 the armature may. be setwalls of

the'containing members

86 and 87.

' From this point on the rotation of the driven section is transmitted positively to the other section since the sprin is unable to take up more of the transmitte energy. This spring connection also absorbs the mechanical shock due to sudden reversal of the motor.

Any desired switch for reversing the motor connections may be employed. In the present instance the reversing switch R comprises a pivoted arm 89- carrying a bridging contact 90 and adapted to .be thrown from engagement with one pair of contacts 91 to j. a second pair 92. These fixed contacts are carried at the upper ends of arms 93 of a frame 94 mounted upon the base 79- and the suitable connections.

tomprite a cam 100 keyed to the shaft 78 movements of the switch-arm 89 are limited by stops 95"carried by the arms 93. The switch arm 89 is o erated directly from the motor driven sha through the agency of These same connections are instrumental in actuating the switch arm '96 of the 'second control switch S which by means of a bridging contact 97' bridges fixed-contacts 98 carried by a suitable insulating support 99 mounted on the base 7 9* These switch actuatingconnections and a member 101 loosely mounted on the shaft 78 and rotatable in close proximity to the cam'100. v The member 101 is connected by a link 102 to the switch-arm 89. A third member 103 is also keyed to the shaft adjacent to the member 101 and these two members are provided with

pins

104 and 105 which are adapted to engage the

ends

106 and 107 of a spring 108 coiled about the shaft and {intended to ive to the reversing SWiiZ-C% The-pins 104 and 105 extend outward from their respective members sufiiciently to engage either of the .ends 106*01 107 of the spring and they are located at different distances from their center of fotation so that they pass readily by each other without interference. For the purpose of holding the member 101 against the pull of the spring 108 While it is being tacts 92; then the direction of rotation is reversed and the parts are brought back to the position illustrated. The various positions of this mechanism will be best understood from an inspection of Figs. 10' and 13 inclusive. Shortly after the shaft begins to rotate in the directionof the arrow 111 the is being a snap movement'- switch-arm 96 will be engaged by the cam face 112 and thrown into engagement with its fixed contacts 98, and about the same time the latch 110 will ride down over the opposite cam face 113 and drop into engagement with the left face of the projection 109. Further movement will release the tension on the spring 108 by bringing the

pins

104 and 105 into alinement. This position is illustrated in Fig. 11. At this point the pin 104 will leave the end 106 of the spring in engagement with the pin 105 and will.

engage the end 107 and carry it around so as to place the spring under tension. This will continue until the cam 100 has passed far enough to bring the face 112 into en gagement with the atch 110, as illustrated in Fig. 12. When this occurs the member 101. will be free to respond to the pull of the spring and will throw the switch-arm 89 of the reversing switch into engagement with the contacts 92. Duringx this entire moveas remained in its of the rement the switch-arm 96 engaging position. The throwin versing tate in the op osite direction. This will first have the e ect of permitting the latch 110 to engage the right-hand side of the stop 109 and thus secure the reversing switch against the pull of the spring 108 while it wound up in the o posite direction. Just before'the latch 110. 1s thrown out of engaging position upon this return rotation of .the shaft, the switch-arm 96 rides over the face 112 of the cam 110 and drops out of engagement with its fixed contacts 98. When thus disengaged the latch 110 is thrown out of engagement with the projection 109 by the face 113 of the cam and the reversing switch takes the position illustrated in Fig. 5.

The crank 76 which operates the main switch through the agency of the connecting rod 22 is loosely mounted 'upon the shaft 7 8 and isprovided with a clutch projection 114 which coiiperates with a similar projection 115 carried by a sleeve 116 which is ke ed to the shaft. A coiled tension-s ring 11 is wound about the exterior of t e adjacent portions of the sleeve and crank structure and. has its opposite

ends engaging projections

118 and 119 on the sleeveand crank, respectively. This spring is normally under slight tension and tends to hold the

clutch projections

114 and 115. in engagement as illustrated in Fig. 8. During the rotation of the shaft 78, in the direction indicated by the arrow 120, the crank 76 is carried around with it to the position illustrated in 9 without theclutch projections being disengaged; Upon the return movement of the shaft this en agement is continued, due to the tension 0% the spring 117, until a proswitch will cause the sha t 78 to ro-- jection 121 on the crank'structure engages oi. engagement with the projection 121,

thereby allowing the crank to respond to the tension of the spring and to complete its rotation. By this means the main switch is givena snap action in closing. 1

Associated with the main Switch and circuitbreaker upon the support 13 are two

switches

126 and 12?,the former being no: tuated by the movable member 12 of the main switch and the latter by the movable member 28 of the circuit. breaker.- Any desired form of'switch may be employed for this purpose but- I prefer a switch of the general construction illustrated in. Figs. 14 and. 15. The switch 126 is a single throw switch while switch 12? is a double thrdw switch These switches are substantially identical in construction except that two of the contacts in switch 126. are omitted. The double throw switch is shown in Figs. 14 and 15. This switch consists essentially of an outer shell 128 composed of wood or other suitable insulating material and carrying two sets of

contacts

129 and 130. The contacts 130 are adapted to be bridged by a dislrcontact 131 carried at one end or", and suitably insulated by an insulating disk 136 from, a reciprocable plunger 132 extending throughv the interior of the shell 128 and terminating at its opposite end in a push button 133. it spring 134 surrounding the plunger 132 and located within the shell andunder the action of the spring 134 is- .-ma1nta1ned in bridging position.

wvard' movement. or the plunger 132 under 128 tends to maintain the plunger in the position illustrated in Fig. 14. The two sets of contacts. 129 are adapted to be bridged by a rectangular contact 135 secured to. theplunger 132 adjacent but in-- sulated from the disk 131. The contact 135 travels inc-slot 135 formed in the shell .128

The outtheaction of the sprin is limited by the engagement of the insuTating disk 136 with projectingshoulders 137 formed in the shell 128. As illustrated in Fig. 15, where the parts are shown with the disk 131 removed,

thefshell 128 in addition to the slot 135%,is cut awayat138 and 139 so that when the disk 131 is moved to substantially mid positionthe plunger 132 be rotated into the dotted line position of Fig. 15 and held against return pins 140 which engage the shoulders 1&1 of the contact block 135. The rotation of the plunger twists the spring 13 1 so thatwhen the push button 13?- is pressed,

inward far enough to move the shoulders 141 of the contact block 135 beyond the ends of the pins 140, the plunger and its connected parts will rotate back to their normal position and may then be moved as desired to complete the circuit between either set of fixed contacts; An inspection of Fig. 15 will show that the rotary movement of the plunger 132 is limited by the sides of the contact block 135 engaging the walls 142 of the cut-away portion of the shell.

From an inspection of Fig. 19, in which present instance, witli a View to simplicity,= a single section of th1rd rail only has been shown together with the switching apparatus and control circuits necessary thereto. This section of third rail, which is designated 145, is supplied with current from the feeder 1&4 through the circuit breaker B and switch A connected in series in the lead 146.

The motor 80 is supplied with current from the feeder 1414 by way of the leads 147, 148, 14:9, 150, 151 and 152 according to the operative positions of the parts of the control mechanism. The circuit is completed'from the motor to ground through the track 153 by way of the lead 154:. The circuit through the lead 150 is made and broken by an electro-magnetically operated switch 155 whose actuating coil is included in a branch 156 running from the point 157 in the control wire158 to the lead 154. This branch includes the contacts 129 of the circuit-breaker actuated control switch 127. A second lead 159 extends froni'the point 157 through the other contacts 130 of this switch, through the trip coil 67 of thejauxiliary trip mechanism of the circuit-breaker and thence through the contacts of the switch .126, which is actuated by the main switch A to the lead 148. These control connections as well as the motor circuitarelocated in proximity "This manual switch is a double throw switch adapted to engage either of the.fixed conto ground as indicated at 164. Y The red indieating lam 165 is includ d in. circuit between the lead 158 and ground while the green indicating lamp 166 is included in the circuit between the lead 158 and the supply lead 163 by way of the contact 161.-

In the operation of thesystem, if it be assumed that the main switch A and circuitbreaker Bare closed the operating mechanism. will be in the position illustrated in Fig. 1 and-the circu1t connections will be those illustrated in Fig. 19. In this position current will be supplied to the red lam 165 from the feeder cable 144 by way 0 the leads 147, 159 through switch 127, contacts 130 and lead 158 to ground at 164. The resistance of this circuit is such that the current flow will be insufiicient to energize the tripping coil 67 enough to trip the circuitbrea er B. At this time the lamp 166 is extinguished since the lead 158 is at the same potential as the lead 143 hence there is no tendency for current to flow through lam 166, fixed contact 161, lead 163 to the lea 143. If now it is desired to disconnect the third rail section 145 from the feeder 144, the manual switch 160 is thrown into engagement with the contact 162 thereby short-circuiting the indicating lamp 165 and causing it to go out. This action will permit enough current to pass through the open under the action of trip-coil 67 to cause it to force its armature 69 into engagement with the tri latch 49 and thus allow the circuit-breaker to fly vity. Upon opening, the movable mem er 28 of the clrcuit breaker moves away from the push button 133 and thereby permits the 5 ring 134 to move the contact 131 to 'br' circuit between the contacts 130 and close it between the contacts 129 which are in the branch 156 leading to the motor control switch 155, thus breaking the branch 159 and closing the branch 156. Obviously the circuitebreaker may also be trip ed upon an excessof current flow through t e lead 146,

in this case the 1 breaker being tripped throughthe armature 63. Inv either event the control switch 127 performs the same function. v

As soon as the circuit is coni'pleted between .the contacts 129 of the circuit breaker actuated control switch 127,, a circuit is completed through the green lamp 166 and the same is caused to burn to indicate that the the through contact 161 of the manual switch 160, through the lamp 166, lead 158, contacts .129, switch 127, coil of the switch 15.5, leads 156 and 154 to ground by way of the track 153, the amount Ofcurrent not being sufficient to energize the coil and close the switch 155.

Now if it is desired to again connect the third rail section 145 to the feeder 144, the manual'switch 160 may be thrown to the contact 161. This will short-circuit green lamp 166 and thereby extinguishit and at the same time energize the coil of the switch 155 suificiently'to close" said switch. The closing of the switch 155 will complete a circuit through the motor as follows: from the feeder 144, through leads 147 and 150 to one" of the contacts 91 of the reversing switch, thence through the bridging contact. 90 to the other contact 91 and through the motor by way of the

leads

152 and 154 to ground at the rail 153. The lead 152 is so connected to the field magnet winding of the motor 180 that its armature will be rotated so as to rotate the shaft 78 in the direction of the arrow 120. This rotation will carry the operating cranks 76 and 77 downward and simultaneously close the circuit-breaker and open the main switch, the two passing each other in mid position. The circuit-breaker will be held in its closed position by means of the trip-latch 49 which will automatically pointed out, shortly after the shaft 78 begins I to rotate, the switch-arm 96 will bridge the contacts 98. This will complete a parallel circuit to the motor from the feeder 144 by way of the branch 148so that the operation of the motor will continue through its cycle irrespective of further manipulation of the. manual switch 160. As previously explained rhenthe cranks .76 andv 77 have reached their lowermost posit-ion the reversing switch will be thrownand this will reverse the direction of rotation of the motor by completing the circuit through the

leads

149 and 151. As the

cranks

76 and, 77* are returned to theifuppermost positions by] the reverse rotation of the motor armature, the positive connection between the actuating rod 70 and the circuit-breaker will be broken, andby the upward movement of the outer end 0 the member 71 the stop 72 will be moved far enough away by the time the crank 77 has reached the end of its movement to permit the circuit-breaker B to open should an over: load exist in the circuit. The u ward move ment of the crank 76 is-retar ed and then "released to close the main switch with a snap, as previously explained. When this Les osltion of the crarflxsis reached therevfers- 1 55.8mm then close said close said breaker circuit througgh the red indicating lamp 165 .scription of the control switch 127 that at any time when the circuit-breaker is open said switch may be setin an open position thereby interrupting the control circuits and preventing interference from the distant control point by the operation of the switch mechanism. In this way the mechanism may be worked upon or repaired without danger of injury.

Obviously many alterations and changes may be made in this specific construction herein disclosed without departing from the spirit and scope of the present invention; I

therefore do not wish to be limited to this specific disclosure but/aim to cover'by the terms of the appended claims all-such alterations and changes.

What I claim as new, and desire to secureby Letters Patent of the United States, is,- 1. The combination with a plurality of switches, of ihanuallycontrolled means for opening. one of said switches and automatic mechanism subsequently operative first, to open another switch and then close both of said switches. I

2. The combination with a plurality of switches, of means'manuallyscontrollcd for opening one of said switches andv automatic mechanism subsequently operative first to open another switch and then close both of said switches one after the other in a defi-' 'nite order.

The combination with a plurality of switches, of means for opening one of said,

switches and additional means operative first to open another of s. id switches, then eloseone of said switches and finally close the other with a snap movement.

4. The combination with a circuit breaker and a switch, means for opening said breaker, and automatic setting mechanism operative first to open said switch and then and switch.

5. The combination with a circuit breaker and a switch, of an electric circuit, an electroresponsive device in said circuit for open ing said breaker, and automatic setting mechanism operative first to open said breaker and finally close said switch.

6. The combination witha, circuit breaker and a switch, of an electric circuit, an electroresponsive device in said circuit forvopening said breaker, a'ndsetting means operative first to open said switch and then 0 ose said breaker and finally close said switch with a snap movement.

7. The combination with a-circuitrbreaker ,and a switch, of means for opening said. circuit-breaker, and an automatlc setting mechanism operating first to open said switch, then close said circuit-breaker and switch in succession.

8. The combination with a circuit breaker and a switch, of an electric circuit, an electrorespo'nsive device'in said circuit for open-- ing said breaker, and setting means operative first to open said switch then close said breaker and finally close said switch with a snap movement.

9. The combination with an electric circuit, of an automatic circuit breaker and a switch in series in said circuit,.means for tripping said circuit breaker open'in ad vance of the opening of said switch and mo-- tor operated means for'rsetting both said breaker and switch so as to make the final closure always at the switch.

10. The combination with a plurality of switches, of a' reversible shaft, connecting means between said shaft and switches for closing one switch and openinv a uother upon a rotary movement of the shai t in one direction and for closing the latter'upon a further rotary movement in the other direction, and means for rotating the" shaft.

11. The combination with a plurality of switches, of ii-reversible crank-shaft, connecting' means between said shaft. and switches for closing one switch and opening another upon the partial rotation of said shaft in one direction and for closing the latter upon a reverse rotary movement, and means for rotating said shaft.

12. The combination with a plurality of switches, of a reversible operatiug'motor therefor, and connecting means between said; motor and switchesfor closing one and open ing another upon the operation of said motor in one direction and for closing the latter switch upon the operation of said motor i114 'the reverse direction.

13. The combination with a circuit breaker and switch, of a reversible operating motor therefor, means for tripping said circuitbreakcr, and connecting means between said motor and said circuit breaker and switch for closing said breaker, and opening said switch upon the operation of said motor in one direction andclosing said switch upon a reverse operation.

14. The-combinationwithacircuit breaker, of means for tripping said breaker, an actuating member, means for giving said meal-"1220 her a to and fro movement, and means actuated by the movement of said member in one directionto engage and set said breaker-and by its movement in the other direction to dlsenga-ge the breaker and render the some free to respond to the'tr' ing means. 3

15. The combination W1 a circuit breaker, of means 'for tripping said breaker, an acturotation of said motor.

. switch,

ating member, means for giving said mempositive connection upon its movement in the other direction.

16. The combination with a movable switch element, of a power driven crank and connecting means between said element and crank operative to establish a positive mechanical connection to set said switch upon a partial rotation of said shaft and to break said positive connection upon a reverse rotary movement of said crank.

17. The combination with an electric switch, of an electric motor for operating said switch, a manual switch for closing a circuit through said motor and means actuated vby the initial closing of said circuit to reverse the direction of rotation of said.

motor.

18. The combination with an electric switch, of an electric motor for operating said switch, a manual switch for closing a circuit through said motor and means actuated by the initial closing of said circuit to close a branch circuit through said motor and subsequently to reverse the direction of 19. The co'rnbination with an electric of an electric motor' for operating said switch, a manual switch for closing a circuit through said motor, means operated by the rotation of said motor to close a branch circuit through said motor and subsequently to reverse its direction of rotation.

20. The combination with an electric circuit breaker and a switch, of an electroresponsive device for tripping said breaker, a control circuit for said electroresponsive device, a manual switch in said circuit, and additional switching means in said circuit actuated by said switch,

21. The combination with an electric circuit breaker and a switch, of an electroresponsive device for tripping said breaker, a

control circuit forsaid electroresponsive de-- vice, a manual switch in said circuit, and switching means operative to maintain the control circuit in condition to be closed by the manual; switch only when both the cir-- cuit breakerand switch are closed. e

22. The combination with an electric circuit breaker and a switch, of an electrore- 'sponsive device for tripping said breaker, a

control circuit for said electroresponsive device, a manual switch in said circuit and means for inalntaining the control circuit in condition to be closed by the manual switch only when the circuit breaker and switch occupy a definite relative position.

23. The combination with an electric circuit breaker and switch, of an electror'el-sponsive device for tripping said breaker, a motor for closing said breaker, control 011'- cuits for said electroresponsive said motor, manual switching means in said circuits, and additional switching means for controlling said circuits in response, to the movements of said switch and circuit breaker.

24. The combination with an electric circuit, two cut-outs included in series therein, control circuits for said cut-outs, lamps and lamp circuits operatively related to said control circuits, and means operated by said cutouts to change the lamp circuits so as to indicate by the condition of the lamps the condition of the main circuit.

25. In a switch, the combination with operating means for said switch, of an electric motor for actuating said' operating means, an elastic power transmitting connection between said motor and said operating means arranged to rotate said motor in the reverse and means actuated by the recoil of said connection for reversing the direction of rotation of said motor during the recoil of said connection.

switch, of an actuating member, a motor, operating means actuated by said motor for giving said member a to-and-fro movement on each closure of the switch, a spring-con- "ing means arranged to drive said motor in the reverse direction by its recoil, and means actuated during the recoil of said connection for reversing the direction of rotation of said motor.

27. In a switch, the combination with an electric motor, of an elastic connection between said motor and said switch yielding under the torque of the motor and driving the motor in a reverse direction by its recoil, and a reversing switch controlled by the motor before the recoil of the elastic connection is expended.

' 28. In a switch, the combination with an electric motor, of an elastic connection between said motor and said switch yielding underthetorqueof the motor and driving the motor in a reverse direction by recoil, and a reversing 'switchcontrolled by the motor shaft to automatically reverse the motor expended.

29; The combination with a reversible electric motor, ofa reversing switch having two running positions forcausing said motor to move in opposite directions, and means for automatically\drii ing said motor in the reverse directionv during the moveother.

' device and.

26. The combination with an electric before the recoil of the elastic connection is I ment of said switch from one position to the,

direction by the recoil of said connection,

nection between said motor and said operat- 30. The combination with a reversible anism for each, a common operating means, electric motor of a reversing switch for said and means for setting them closed only in a motor, automatic .means for driving said determined order, the toggle of the breaker motor in the reverse direction, when said being latched and underset and that of the 1-5 5 switch is opened, and means for automatswitch being overset when both are closed.

ically moving said switch to close the cir- In Witness Whe reof, I have hereuntoset cuit to drive said motor in the reverse direcmy hand this 31st day of August, 1905.

tion While the motor is being driven in the EDWARD M. HEWLETT. reverse direction by said automatic means. Witnesses:

. 10 31. The combination with a circuit BENJAMIN B. HULL,

' breaker, of a switch, toggle operating mech- 'HELEN @RFORD.