US1948450A

US1948450A - Electric circuit for controlling motors

Info

Publication number: US1948450A
Application number: US648464A
Authority: US
Inventors: Ernest K Whitener; Thomas F Suggs
Original assignee: Cocker Machine and Foundry Co
Current assignee: Cocker Machine and Foundry Co
Priority date: 1932-12-22
Filing date: 1932-12-22
Publication date: 1934-02-20
Anticipated expiration: 1951-02-20

Description

1a.- K. Awl-nTENER ET AL ELECTRIC CIRCUIT FOR CONTROLLING MOTORS Feb. 2o, 19.3.4

Filed D80. 22, 1932 heets-Sheet 1 fsw E :2r/5.57' K. Wfl/TENER Tuo/m5 fr" Suees Feb. 2o," 1934.

E; K. WHITENER ET AL ELEC/TRIO CIRCUIT FOR CONTROLLING MOTORS s' Sneefs-sheet 2 Filed Deo.

ERNET K WHITENER 7/oMns FUG-Gfs Feb. 2o, 1934.

E. K. WHITENER ET AL ELECTRIC CIRCUIT FOR CONTROLLING.` MOTORS Filed Deo.

22. 1932 3 Sheets-Sheet 3 a 5 5 m m, f Z l |II| H N HI l 7 A lo /9 5 we., 5 o e 7 2 m0 m. W 215 H 0 0 l l w. l E Y w To 5 m. 5 w l M 7 .w 0 lv@ 7 l m m wm Patented. Feb. 20, 1934 1,948,450 .y ELECTRIC CIRCUIT FOR CoN'raoLLIN Mo'roRs Ernest K. `Whitener and Thomas F. Suggs, .Gas-

tonia, N.v C., assignors to Cocker Machine and Foundry Company, Gastonia, N. C., a corporation of North Carolina Application December zz, 1932 Serial No. 648,464

18 Claims. (Cl. 172-479) This invention relates to an electrical hook-up for stop motions particularly adapted to be used on beam warpers, ball warpers, linking warpers and with slight modifications, looms and the like or any form of textile machine where there is a plurality of threads and a stop motion is desired. Heretofore, Various types of manually op1 erated stop motion machines have beenused as well as the combination of manually'and me- -chanically operated stop motions and also manually and electrically operated stop motions have been used to accomplish this purpose.

It is a Well known fact that when mechanically operated stop motions are used,vthey are very often heavy, cumbersome and require a good many moving parts.Y They are also slow in action and drop wires quickly choke up which completely puts the stop motion out of action. In the electrical-mechanical combination the disadvantage seems to be chiey that the adjustment has to be so delicate that the combination very often fails to function.

It is an object of this invention to provide a system which is purely electrical to replace the various types of stop motions just described and also to provide a stop motion which will automatically stop for leases, cut marks, and the end of warps or vbroken threads. This system also provides a hook up whereby the creel fans will automatically be stopped when an end is down or when a lease is desired to be put in.

`It is a further object of this invention to pro-` vide means whereby the row and also the board ,in which the broken thread has occurred can be located immediately. We provide a hook-up for an annunciator system which immediately denotes the board and the row after a thread is broken and at the same time the Creel fan and the Inotor is stopped. v

We also provide means whereby all parts eonnected to the wiring4 system may be stopped with the exception of the motor inorder that the thread and the like may be moved in the machine a short distance at a time. This system is adapted to be started by a manually operated .switch but when once started is adapted to run continuously until a thread is broken or until it is automatically stopped when a lease is desired to be put in after a predetermined number of yards has been run ofi and contact is made by the counter mechanism whereby the stop motion is operated. It can also be stopped by said manual means.

In addition to the manually operated switch for starting and stopping the motor which drives the Warp handling or web handling apparatus. there are other means, such as a foot-operated switch whereby 'the motor can be started and stopped to "inch the yarn, fabric or web supply through the apparatus. o

Some ofv the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which- Figure 1 is a wiring diagram of my invention e5 showing means for the automatic electrical stop motion when a broken thread occurs or when a predetermined number of yards have been run and the lease is desired to be put in;

Figure 2 is a wiring diagram of my invention 70 showing means for the automatic electrical stop motion for leases and a broken thread and also an annunciator system which tells the board and also the row in which the fabric is broken;

Figure 3 is a wiring diagram for the creel Ian 75 motor which may be connected to form shown in either Figure 1 or Figure 2;

Figure e is a plan view of the delayed circuit breaking switch;

Figure 5 is a. front elevation of Figure 4;

Figure 6 is a longitudinal sectional view of the delayed circuit breaker taken along line 6 6 in Figure 4;

Figure 7 is a cross sectional view taken along line 7-7 in Figure 4 showing the means for 85 making and breaking the circuit and showing the action of the button just before `the contact is broken.

Referring more particularly to the drawings, the numeral 10 denotes the entrance switch to 90 the wiring system to which wires 11 and l2 are connected,` thru which current from some outside source is introduced into the system. From one side of entrance switch 10 a wire 13 leads to fuse 14. and from the other side of fuse 14 an- 95 other wire 15 leads to one side of coil 1G. When the current enters coil 16 this coil is energized and immediately switches 17, 18 and 19 are closed allowing current to iiow thru

wires

20, 21 and 22

thru fuses

23, 24 and 25 respectively and m9, thru the

main switches

17, 18 and 19 just described and from there

thru wires

26, 27 and 28 into motor 29. The current for operating the motor 29 passes through switch D from wires A, B and C. 195

Leading from wire 28 we have wire 30 which 'leads into one side of coil 31 which is provided for the magnetic brake for themotor. From the other side of coil 31 wire 32 leads ,back into one of the main wires 27.

From the other side of coil 16 a suitable wire is provided which is connected to one side of a thermal overload protection device 36. This device comprises a heating element which expands when heated and automatically disconnects the switch when the control circuit is overloaded. Fromthe other side' of this device 36 a suitable wire 37 leads to fuse 38 and from this fuse 38 wire 39 leads to terminal 40 which is adapted to be contacted by the left hand end of switch 41 pivoted as at 42.

The right hand end of switch 41 is adapted to make contact with terminal 43. To terminal 43 a wire 44 is attached which leads tothe other side of the circuit to switch 10 which completes a circuit. Leading from wire 35 between coil 16 and protection device 36 is another wire 45 which leadsto one side of fuse 45a.v It might be added that

fuses

38, 14 and 45a are installed in these lines to protect the lines against short circuits and the like. From the other side of fuse 45a a circuit wire 46 leads to terminal 47. A suitable jog switch 48 is adapted to make contact with terminal 47 and terminal 49., Jog switch 48 is usually placed beneath the machine driven by the motor 29 so it can be actuated by the foot of the operator for operating the machine for short periods to inch the material thru the machine.

From terminal 49 a suitable wire 50 leads to one side of coil 51 which is a part of the delayed circuit breaker 52 shown in Figures 4 to 7 inclusive. From the other side of coil 51 another suitable wire 52a leads to the main wire 13., From this circuit just described another circuit beginning with wire 53 which is attached to wire leads to one side of coil 54 and from the other side of said coil 54 another suitable wire 55 leads to the wire 13 to complete a circuit. It will be noted that the

coils

16, 51 and 54 in the three circuits previously described are wired in parallel. By this method it avoids the choking eect that would be produced if these coils were wired up in series.

Leading from pivot point 42 on switch 41 is a suitable wire which is secured to terminal 61. This terminal 61 is adapted to be contacted by one side of a switch 62 and the other side of switch 62 contacts terminal 63. Secured to terminal 63 is a suitable wire 64 which leads to terminal 65, said terminal 65 being adapted to be contacted by one side of switch 66. The other side of switch 66 contacts terminal 67 and to terminal 67 a suitable wire 68 leads to wire 44.

Near the switch 10 another wire 70 is secured to wire 13 which leads to the primary side of the transformer 71 (see Fig. 1) and from the other side of transformer 71 a suitable wire 72 leads to terminal 73 on delayed circuit breaker 52. Switch 74 of delayed circuit breaker 52 is adapted to contact terminal 73 on one side and terminal 75 on the other side. Secured to terminal 75 is a wire 76 which is secured to wire 44 which completes the circuit.

From the secondary side of transformer 71 a suitable wire 78 leads to bus bars 79 on eye board stop motions 81 and 82. Bus bars 79 have a plurality of wires 79a which are connected to terminal 83a. A suitable switch or drop wire 83 is adapted to Contact terminal 83a whenever an end or a fabric is broken. The other end of each drop wire 83 has a wire 87 which is connected to bus bar and on the other end of bus bars 80 a suitable wire 84 leads to one side of coil 85. From the other side of 'the secondary side of transformer 71.

said coil 85 a wire 86 leads to the other side of Leading from wire 78 is another wire 90 which is connected to terminal 91. Terminal 91 is adapted to be contacted by switch 92 which is pivoted as at terminal 93 and from terminal 93 a wire 94 leads back to wire 84 which completes a circuit.

This` switch 92 'is automatically operated by a counting mechanism. When a predetermined number of yards of yarn, web supply, fabric and the like has been run oiT the switch is closed to cause the machine to stop for putting in leases or for the placing of cut ma-rks in fabric or when the end of the yarn, web supply or fabric has been reached.

Leading from wire 39 near terminal 40 is another wire 100 which is secured at its other end to terminal 101. Switch or jog button 48 is adapted to contact terminal 101 on one side and the other side is adapted to connect terminal 102. Wire 103 is connected to terminal 102 which leads back to wire 44 to complete the circuit.

It will be noted that when button or switch 48 contacts terminals 101 and 102 it breaks con` nections between

terminals

49 and 47 on

wires

50 and 46 and thus by-passes coils 51 and 54 causing all parts of the control except the motor to cease operation.

It should be noted also that motor switches 17, 18, 19, switch 92 which is operated by the counter mechanism, the switches 83 on the eye board stop motion, the delayed circuit breaker switch 74 andV switch 66 and the right hand end portion of switch 41 that contacts terminals 43 are normally open and the left hand portion of switch 41 that contacts terminal 40 and switch 62, switch 48 are normally closed.

The method of operation for the circuit shown in Figure l is as follows:

' To startthe operation of the machine, the right hand end of switch 4l is made to Contact terminal 43. This completes a circuit composed of wire 13, fuse 14, wire 15, coil 16, wire 35, overload relay 36, wire 37, fuse 38, wire 39, switch 41 and wire 44. When this circuit is completed coil 16 is energized and switches 17, 18 and 19 are automatically closed. This causes current to flow to motor 29 and also energizes coil 31 of magnetic motor brake, and releases the brake on the motor 29. At the same time the current flowing thru

wires

55, 53, 50, 46 and 45 energizes coil 54 and causes switch 66 to make contact with terminals 65 and 67. Also current ows thru wire 52a into coil 51 of delayed circuit breaker 52 and causes switch 74 to contact termi- .nals 73 and 75, -to furnish current to energize wires 72 and 76 and energize the drop wires. when drop wires 83 fall, contacting terminals 83a.

After contact is made between the right hand Y portion of switch 41 and terminal 43 and the previously described switches are closed thereby, the right hand end portion of switch 41 assumes its normal open position. The current now, instead of flowing from wire 39 thru switch 41, terminal 43 and wire 44, will ow from wire 39 thru wire 60, switch 62, wire 64 and switch 66 and wire 68 back to wire 44. Current will continue to flow thru wires 55, v53, 50, 46. and 45 to energize coil 54 to hold switch 66 in closed position. Coil 51 will also continue to be energized by current passing thru

wires

52a, 50, 46 and 45.

When the yarn, web supply and the like breaks counter mechanism, is wired up in the same manner as switch 83 on the eye board stop motion, when a predetermined number of yards have been run or the end of yarn, web supply, fabric and the like is reached, the switch 92 is automatically closed and the same result is obtained as when one of drop wires 83 is closed by the breaking of the thread. If it is desired to stop the entire m'achine by hand, the left hand portion of switch 41 is pressed downwardly thus breaking the contact between this switch and terminal 40 which, in turn, deenergizes the

coils

54, 51 and 16 and stops the machine immediately.

The form shown in Figure 2 is identical to that shown in Figure 1 with the exception of the wiring for the annunciator system and the stop motion eye board.' With the wiring for the annunciating system, to denote'the row and board that has a broken thread, it has been found economical to use two transformers, 105 and 106', wired up in parallel. One side of the primary side of these transformers is connected to wire 13 by awire 107 and the other side has a wire. 108 leading to terminal 73 of the delayed circuit breaker 52. One side of switch 74 connects terminal 73 and the other side of switch 74 contacts terminal '75 and from terminal 75 a suitable wire 109 leads back to wire 44 to complete a circuit.

One end of the secondary `side of the transformers 105 and 106 hasa wire 110 which leads to one side of coil 111 and also to terminal 112. To the other side of coil 111 -there is a wire 117 leading to terminals 118and 119. Coil 111 conltrois switches 113, 114, 115 and 116. The switch 116 is identical and serves the same purpose as switch 62 in Figure 1.

' The other side of the secondary end of transformers 105 and 106 has a wire 120 which`ls connected to a wire 121, one end of which is connected to terminal 122, and the other end is connected to one side of the annunciator drop coils 123, 124, 125 and 126.- From the other side of these annunciator drop coils,

wires

126b, 127, 128 and 129 respectively are provided which connect to bus bars on boards 81 and 82.l Bus bars 79-on boards 81 and 82 have wires 130 and 131 that lead to annunciator drop coils 132 and 133 respectively. On the other side of annunciator drop coils 132 and 133 a suitable wire -134 leads to terminals 135 and 136. The wiring for the counter contact is provided in the same man'- ner as shown in Figure 1, and in this case wire leads from wire 134 to terminal'91 oi' -swltch 92, said switch 92 being adapted to contact termimi 9a and` from terminal 93 a. summe wire 94 leads to wire 121 to complete a circuit. Annunciator coils 132 and 133're provided for the boards 81 `and 82 oi the. drop wires and annunciator coils 123 tol 128 are provided for the rows 123a to 126a inclusive in the board.

The manual starting and stopping of the machine in this form o1' wiring is accomplished by switch 41 in the same manner as described in Figure 1. f In the form shown in Figure 2, let us suppose that a. thread is broken in board 82, and

row 123a. Immediately, one of the drop wires 83 completes the circuit composed of wires 12611, an-

, nunciator drop 123, wires 121l and 120, the secondary side of transformers 106 and 105, wire 110, coil 111'," wire 117, switch 115, wire 134, 'annunciator drop 133, wire 131 and bus bar 79 and coil 111 is energized thereby and switches 115 and 116 are open while switches 113 and 114 are closed.

The opening of switch 116 will produce the sameY effect upon

switches

66, 74, 17, 18 and 19 as previously described and the entire. machine will be stopped, but when the switches 113 and 114 are closed, the current which flows thru wire 120 will be dividedat wire 121 and part of the current will flow thru switch 113, wire 117, coil 111, wire to the other side of the secondary portion of the transformer while the other part of theel' current will ow thru wire 121, thru annunciator drop 123, wire l126b, bus bar 80, wire 87, drop wire 83, wire 79a, bus bar 79, wire 131 and annunciator drop 133 and wire 134, switch 114 and wire 110,` back to the other side of the secondary side oi' the transformer to complete the circuit. The closing of switches 113 and 114 also completes the same circuit but causes coil 111 to bein parallel with drop coils instead of in series as was the case when coil 111 was first energized.

It will be noted that when the current iiows thru annunciator 123 the annunciator drop will fall denoting that the thread orbroken end is on row 123e and when the current passes thru annunciator 133 a drop will fall and denote that the end is on board 82. Due to annunciator drops 123 to 125 inclusive and 132 and 133 having drops which fall by gravity and denote the board and row when the coils are. energized, it is very essen# tial that these coils remain energized long enough for gravity to let the drops fall. For this reason the delayed circuit breaker switch 74 is held by means of a 'dash-pot (see Fig. 6) in contact a short time after switches 115, 116 and 66 have been opened and the current is held on the an' nunciator coils a few seconds after the other switches` have been opened.

In Figure 3 the wiring diagram for the automatic'stop and start motion for the cre'el'fan is shown. This may be used in the circuits shown in Figures 1 or 2 in lieu of switch 66 by making slight alterations in wiring. In this form, as before, a suitable wire 53 leads from wire 50 to one side ol' coil 54 and from the other side of coil 54 another wire 55 leads back to wire 13 to complete a circuit. l

Leading from wire 44 is another wire 150 which is connected to terminal 151. One side' of switch 152 is adapted to contact terminal 151 and the .other side of switch 152 is adapted to contact terminal 153. Secured to `terminal 153 is wire 154 which is connected to one side of creel fan motor 155 and the other side of creel fan motor 155 haswire'156 which is connected to terminal 157 which is controlled by one side of switch 158 and the other side of switch 158 is adapted to contact ter# minal/1'59. Also secured to terminal 159 is a suitable wire which contacts wire 55 to complete e the circuit. The current that flows thru

wire

60 and 153 are made to contact terminalsvv 151, 153,

159 land 157 and the current is allowed to flow thru wire 160, switch 158, wire 156'creel fan mo@4 m tor 155 and from there back thru wire 154, switch nals 73 and 75.

152, wire 150 back to wire 44. In the meantime, switch 152 serves the same purpose as switch 66 in Figure 2 or Figure 1.

In Figures 4 to 7 inclusive the details of the -delayed circuit breaker are shown in which a suitable board plate 160 is provided with holes 161 therein for attachment to the machine or wall or the like and secured to this board by means of screws 162 is a block 163 which is composed of insulating material, said block 163 has a bore 164 therein in which hollow cylindrical members 165'and 166 are secured. Slidably mounted in hollow member 165 is a button 167 which is also composed of insulating material and in the upper face of this button a bore 168 is provided into which another hollow cylindrical member 169 is secured, said member 169 extends upwardly near the lower portion of hollow cylindrical member 166. l

Slidably mounted in the upper end of hollow cylindrical member 169 and extending to the inside thereof is a rod 170 which has an enlarged head portion 171 on its lower end. A small compression spring 172 is conned on rod 170 by means of head portion 171 and the upper end of cylindrical member 169. Integral with rod 170 and extending above hollow member' 169 isa switch bar 74 which is adapted to make and break contact with contact points 73a and 75a of termi- Another spring 175 is conned around cylindrical member 169 and the lower portion of switch bar 74 by means of button 167 and the upper end of member 166.

, Figure 6 shows switch bar 74 and the mechanism associated therewith when the switch is open, and Figure 7 shows the switch closed but .also showing the button 167 in a partially released position just before the switch bar 74 breaks contact with points 73a and 75a. Spring 175 tends to keep the switch normally open while spring 172 gives the switch 74 a snap action and provides a sudden break for the switch when .the opening takes place.

Block 163 has another bore 176 into which dash pot 177 is secured. Dash pot 177 is composed of a hollow cylindrical member with a top portion 178 which has secured therein a nut 179, said nut having a small hole 180 penetrating its center. Slidably mounted in dash pot 177 is a valve 181 i which is inserted in the lower side of the dash pot to form an air chamber 182. This valve 181 is secured to rod 184, said rod 184 extends downwardly and is pivotally secured at its lower end as at 186' to bar 185 which extends to the left in Figures 5 and 6 and is pivotally secured to block 187 'as at 188. Block 187 extends upwardly and is secured at its upper end to block 163 by means of screws 189. Bar 185 also extends to the right Vof pivot point 186 and has pivotally secured at its end as at 190 a link 191 which, in turn, extends upwardly and is pivoted at its other end to the lower side of member 192 as at 192a.

Member 192 has on its upper end a portion 193 which is composed of some metal such as soft steel and is adapted to slide in member 194 around which wire coil 51 is wound: Coil 51 is secured within a plurality of laminated plates 195, said plates being riveted to brackets 197 at their lower side by means of rivets 196 and to brackets 198 at their upper end by means of rivets 199. The lower end of this structure just described is secured to block 163 by means of screws 200 which penetrate the outstanding leg of bracket 197 and are embedded in block 163, while at upper end suitable screws 201 penetrate the outstanding leg of brackets 198 and are secured to the outstanding Ieg of angle member 202 which member has its other leg secured to board 160 by means of screws 203.

When the current enters coil 51 thru wire 52a and is energized, member' 193 is pulled upwardly and at the same time the right hand end of bar 185, rod 184, valve 181 and switch bar 74 moves in the same direction. When switch bar 74 moves between contact points 73a and 75a contact is made and the current is allowed to flow on the other circuit.

When the current is cut oi from coil 51 and it is cle-energized the reverse action takes place, namely member 193, bar 185, rod 184, valve 181 and switch bar 74 move downwardly to a position shown in Figures 5 and 6.

In order to prevent an immediate breaking of switch 74, washer 181 in dash pot' 177 is provided which retards the downward movement since washer 181 can move downwardly only as air enters chamber 182 thru hole 180. By this means switch bar 74 is held in contact with contact points 73a and 75a a few moments after coil 51 is denergized. The downward movement of bar 185 is limited by a set screw 205 which is threadably mounted in the outstanding leg of angle member 206, said member 206 being secured to board 160 by any suitable means such as set screws 207. The washer 181 is such as to allow air in chamber 182 to iiow by the outer edges of the washer when it moves upwardly to allow quick closing of the

branch circuits

108 and 109, when coil 51 is deenergized washer 181 on its downward travel prevents passage of air thereby and air must enter solely thru port or hole 180` and thus the breaking of switch 74 is delayed.

In the drawings and specification there has been set forth a preferred embodiment of the invention and although specific terms are employed they are used in a generic and descriptive .sense only and not for purposes of limitation, the scope of the invention being set forth in the appended claims.

1. A motor having a circuit leading thereto, a s vitch in the circuit adapted to be normally held in open position, a switch control circuit, electromagnetic means in said switch control circuit, a circuit shunted .around the electro-magnetic means and having a second electro-magnet and having a third electro-magnet therein, a manually operated switch in the return side of the switch control circuit, a branch circuit adapted to be connected to the switch control circuit, and having a switch therein normally held in open position and adaptedto be closed by said second electro-magnetic means, a plurality of drop Wires in said branch circuit, a fourth electro-magnet in said branch circuit, a third shunt circuit in the return side of the switch control circuit, a pair of switches in said third shunt circuit, one of the switches in the third shunt circuit being adapted to be normally held in open position and being adapted to be closed by energization of the third electro-magnet, the other switch in said third shunt circuit being adapted to be held in closed position and adapted to be opened but-the energi- 'zation of the fourth electro-magnet in the branch circuit, the closing of the manually operated switch being adapted to energize the first three electro-magnets to start the motor and close the switch operated by the second and third electromagnets and to cause the third electro-magnet to remain energized to maintain the switch control circuit after the opening of the manually operated switch, the falling of a drop wire being usy adapted to energize the fourth electro-magnet to lrlealr the control circuit, thereby de-energizing e lirst three Aelectro-magnets and causing the switch control circuit to be broken and the branch circuit to be broken.

2. An electric motor having a circuit leading thereto, a switch control circuit comprising a main circuit, an electro-.magnet in one side of the said main circuit, an auxiliary circuit shunted around said electro-magnet and having a second electromagnet therein, a second auxiliary circuit shunted around the first electro-magnet and having a third electro-magnet therein, a manually operated switch in the main circuit normally held in open position, a branch circuit having a switch therein normally held in open position, means connected to the second electro-magnet for connecting the branch circuit to the main circuit when the second electro-magnet is energized, a 'plurality of drop wires in said branch circuit normally held in open position, a fourth` electromagnet in said branch circuit, a circuit shunted around the manually operated switch and having a pair of switches therein, means connectingv one ot the switches to the fourth electro-magnet for opening the switch when a drop wire falls, the

other switch in said circuit shunted around 'the manually operated switch, being operated by the third electro-magnet for closing the same when the manually operated switch is closed, the closcircuit having therein an electro-magnet connected t0 said switch, a manually operated *switch for closing the main circuit, an auxiliary ycircuit in parallel with said electro-magnet and having a second electro-magnet therein, a second auxiliary circuit connected to opposite sides of the manually operatedswitchand having a switch thereinconnected to the second electromagnet and adapted to be h eld in open position and to be closed by energization of the second electro-magnet, the closing ofthe manually operated switch being adapted to energize the second electro-magnet to close the second auxiliary circuit to maintain the switch control circuit after ,the manually operated lswitch4 has been opened, a second switch in said second auxiliary circuit normally held in closed position, a branch circuit havingl an electro-magnet therein-connected lto the second switch in the 'second auxiliary circuit, the closing of the` branch circuit being adapted to, energize theelectrmagnet therein to break the iirst auxiliary circuit and t'o control circuit oi' which it is a part, and

means operable by the` closing of the control switch in said circuit -normally heldin open position, a switch control circuit comprising a main circuit having therein an electro-magnet con-5,

nected to said switch-and a manually operated switch for closing the main circuit, an auxiliary circuit in parallel with said electro-magnetand having a second electro-magnet therein, a second auxiliary circuit connected lto opposite rsides of the manually operated switch and having a switch therein connected to the second electromagnet and adapted to be held normally in open position and to be closed by energization of the second electro-magnet, the closing of the manually operated switch being adapted to energize the second electro-magnet to close the second auxiliary circuit to maintain the switch control circuit after the manually operated switch has been opened, a second switch in said second auxiliary circuit normally held in closed position, a branch circuit having an electro-magnet there-n in connected to the second switch in the second auxiliary circuit, the closing of the branch circuit being adapted to energize the electro-magnet therein to break the first auxiliary circuit and the control circuit of which'it is a part, and means operable by the closing of the control circuit for connecting the branch 'circuit to the main circuit.

5,. `An electric motor having a circuit and a switch in said circuit'normally held in open po sition, a switch control circuit comprising a main circuit having therein an electro-magnet connected to said switch and a manually operated switch for closing the main-circuit, an auxiliary circuit in parallel with said electro-magnet and having a second electro-magnettherein, a second auxiliary circuit connected to opposite sides of the manually operated switch and having a switch therein connected to the second electromagnet and adapted to-be held in open position and to be closed by energization of the second electro-magnet, the closing of the manually op-r erated switch being adapted to energize the second electro-magnet to close the second auxiliary circuit to maintain the switch control circuit after the manually operated switch has been opened, a second switch in said auxiliary circuit normally held in closed position, a branch cir-` cuit having its ends connected to opposite sides of the control circuit and having an electromagnet therein connected to the second Switch in the second auxiliary circuit, the closing of the branch circuit being adapted to energize the electro-magnet therein to break the first auxiliary circuit and the control circuit of which it is a part. y 6. In an electric motor having a circuit leading thereto, a normally open switch inl said circuit, a switch control circuit having an electromagnet therein `for movingthe switch to closed position when the circuit is closed, a manually operated switch for closing the switch control circuit, an auxiliary circuit shunted around the l. manually operated switch and having a switch therein, a second auxiliary circuit shunted around the electromagnet for closing the switchl and having a second electro-magnet therein connected, to the switch in. the rst auxiliary circuit to'- maintain the switch control circuit after the manually operated switch is opened, a branch circuit leading from opposite sides of thecontrol circuit and having an electro-magnet therecircuit being adapted to energize the/electro- ,magnet therein to open-the switch in the rst auxiliary circuit to break the control circuit.

'7. An electric motor havinga circuit and a 145 switch -in said circuit`normally held in open position, a switch control circuit comprising a main circuit having therein an electro-magnet connected to said switch and a manually operated switch for closing the main circuit, an auxiliary 1N circuit in parallel with said electro-magnet and having a second electro-magnet` therein, a second auxiliary circuit connected to opposite sides of the manually operated switch and having a switch therein connected to the second electro-magnet and adapted to be held in open position and to be closed by energization of the second electromagnet, the closing of the manually` operated switch being adapted to energize the second electro-magnet to close the second auxiliary circuit to maintain the switch control circuit after the manually operated switch has been opened.

8. An electric motor having a circuit leading thereto and a normally open switch in said circuit, a switch controlcircuit having electro-mag- Anetic means therein for/closing sa'd switch, a

manually operable switch in said switch control circuit, an auxiliary circuit shunted around the manually operable switch, a second auxiliary circuit shunted around the manuallyoperable switch, means in the second auxiliary circuit operable upon closing of the manually operable switch for establishing the second auxiliary circuit around the manually operable switch for maintaining the switch control circuit after the manually operable switch is opened, a branch circuit connected to opposite sides of the switch control circuit and having means operable thereby when closed for breaking the switch control circuit.

9. In an electric motor having a circuit leading thereto, a switch in said circuit adapted to be held normally in'open position, a switch control circuit having electro-magnetic means therein for moving the switch to closed position when the switch control circuit is closed, an auxiliary circuit connected to the switch control circuit adapted to be closed by the closing of the switch control circuit and to remain closed after breaking of the switch control circuit, a second auxiliary circuit having means therein for maintaining the rst auxiliary circuit in closed position, while the second auxiliary circuit is energized and being adapted to break the rst auxiliary circuit when the second auxiliary circuit is cle-energized.

l0. An electric motor having a circuit leading thereto and a switch in said circuit, said switch being normally held in open position, a switch control circuit adapted, when closed, to hold said switch in closed position, an auxiliary circuit h'aving means therein operable by the closing of the switch control circuit for maintaining the switch control circuit in closed position after the main circuit has been opened, `a branch circuit leading from the switch control circuit and means operable by the closing of said branch circuit for opening said switch control circuit.

1l. Means for making and breaking an electric circuit to an electrically operated apparatus pro' vided with a circuit having a switch in said circuit normally held in open position, a control circuit having electro-magnetic means therein connected to the switch and a manually operated switch therein normally held in open position, means operable by the closing of the manually operated switch for establishing a circuit around the switch to maintain the control circuit in closed position after the manually operated switch has been moved to open position, a second electrically operated apparatus having a circuit for operating the same, connectable' to the control circuit and means operable by the closing of the manually operated switch for establishing a circuit to the second electrically operated apparatus.

12. Means for making and breaking an electric circuit to an electrically operated apparatus provided with a circuit having a switch in said circuit normally heldin open position, a control circuit having electro-magnetic means therein connected to the switch and a manually operated switch therein normally held in open position, means operable by the closing of the manually operated switch for establishing a circuit around the switch to maintain the control circuit in closed position after the manually operated switch has been moved to open position, a branch circuit connected to the control circuit and being normally de-energized and means operable upon energization of the branch circuit for breaking the control circuit.

13. Means for making and breaking an electric circuit to an electrically operated apparatus provided with a circuit having a switch in said circuit normally held in open position, a control circuit having electro-magnetic means therein connected to the switch and a manually operated switch therein normally held in open position, means operable by the closing of the manually operated switch for establishing a circuit around the switch to maintain the control circuit in closed position after the manually operated switch has been moved to open position, a branch circuit connected to the control circuit and being normally de-energized and means operable upon energization of the branch circuit for breaking the control circuit, means operable upon closing of the control circuit for connecting the branch circuit to the control circuit.

14. Means, for making and breaking an electric circuit to an electrically operated apparatus provided with a circuit having a switch in said circuit normally held in open position, a control circuit having electro-magnetic means therein connected to the switch and a. manually operated switch therein normally held in open position, means operable by the closing of the manually operated switch for establishing a circuit around the switch to maintain the control circuit in closed position after the manually operated switch has been moved to `open position, a branch circuit connected to the control circuit and being normally de-energized and means operable upon energization of the branch circuit for breaking the control circuit, means operable upon closing of the control circuit i'or-connectingthe branch circuit to the control circuit and means operable upon breaking the controlcircuit for disconnecting the branch circuit from the control circuit.

15. Means for making and breaking an electric circuit to an electrically operated apparatus provided with a circuit having a switch in said circuit normally held in open position, a control circuit having electro-magnetic means therein connected to the switch and a manually operated switclitherein normally held in open position, means operable by the closing of the manually operated switch for establishing a circuit around the switch to maintain the control circuit in closed position after the manually operated switch has been moved to open position, a branch circuit connected to the control circuit 'and being normally de-energized and means operable upon energization of the branch circuit for breaking the control circuit, means operable upon' closing of the control circuit for connecting the branch circuit to the control circuit, means operable upon breaking the control circuit for disconnecting the branch circuit from the control circuit, and means for delaying the breaking of the circuit for an appreciable time after the control circuit has been broken.

16. Means for making and breaking an electric circuit to an electrically operated apparatus provided with a circuit having a switch in said circuit normally held in open position, a control circuit having electro-magnetic means therein connected to the switch and a manually operated switch therein normally heldin open position, means operable by the closing of the manually operated switch for establishing a circuit around the switch to maintain the controlv circuit in closed position afterthe manually operated switch has been moved to open position, a branch circuit connected to the control circuit and being normally de-energized and means operable upon energization of the branch circuit for breaking the control circuit, means operable upon closing of the control circuit for connecting the branch circuit to the control circuit, means operableupon breaking the control circuit for disconnecting the branch circuit from the control circuit, means for delaying the breaking of the circuit for an appreciable time after the control circuit has been broken, a normally open electric circuit and means for closing the circuit, means operable upon closing of the circuit for establishing an auxiliary circuit around the closing means.

17. Means for making and breaking an electric circuit to an electrically operated apparatus provided with a circuit having a switch in said circuit normally held in open position, a control circuit having electro-magnetic means therein connected to the switch and a manually operated switch therein normally held in open position, means operable by the closing of the manually operated switch for establishing a circuit around the switch to maintain the control circuit in closed position after the manually operated switch has been moved to open position, a branch circuit connected to the control circuit and being normally de-energized and means operable upon energization of the branch circuit for breaking the control circuit, means operable upon closing of the control circuit for connecting the branch circuit to the control circuit, means operable upon breaking the Acontrol circuit for disconnecting the branch circuit from the control circuit, means for delaying the breaking of the circuit for an appreciable time after the control circuit has been broken, a normally open electric circuit and means for closing the circuit. means operable upon closingof the circuit for establishing an auxiliary circuit around the closing means, a branch circuit and means operable upon closing of the circuit for connecting the branch circuit to the circuit.

18. Means for making and breaking an electric circuit to an electrically operated apparatus providedv with a circuit having a switch in said circuit normally held in open position, a control circuit having electro-magnetic means therein connected to the switch and a manually operated switch therein normally held in open position, means operable by the closing of the manually operated switch for establishing a circuit around the switch to maintain the control circuit in closed position after the manually operated switch has been moved to open position, a branch circuit connected to the control circuit and being normally de-energized and means operable upon energization of the branch circuit for breaking the control circuit, means operable Iupon closing' of the control circuit for connecting the branch circuit to the control circuit, means operable upon breaking the control circuit for disconnecting the branch circuit from the control circuit, means for delaying the breaking of the circuit for an appreciable time after the control circuit has been broken, a normally open electric circuit and means for closing the circuit, means operable upon closing of the circuit for establishing an auxiliary circuit around the closing means, abranch" circuit and means operable upon closing of the circuit for connectingthe branch circuit to the circuit and means operable upon closing of the branch circuit for opening the circuit.

` ERNEST Ks WHITENER.4

THOMAS F. sUGGs.