US1022644A - Remote control apparatus. - Google Patents

Description

W. M. SCOTT.

REMOTE CONTROL APPARATUS.

APPLICATION FILED JUNE 29, 1910,

Patented Apr. 9, 1912.

2 SHEETS-*SHEET 1.

W. M. SGOTT.

REMOTE CONTROL APPARATUS.

2 1 9 1 9 R p A d 6 +0 n 6. b a D x a 4 4 6 O 2 2 0 1 2 SHEETS-SHEET 2,

lmwmor Fig. 5.

Wmwmeo UM (FQZZM WILLIAM M. SCOTT, PHILADELPHIA, PENNSYLVANIA.

REMOTE CONTROL APPARATUS.

Specification of Letters Patent. Application filed June 29,1910. Serial No. 569,477.

Patented Apr. 9, 191 2.

To all whom it may concern.

Be it known that 1, WILLIAM M. Soon, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Remote Control Apparatus, of which the following is a specification.

My invention relates to electric switching or control apparatus, and particularly to electric switch or circuit breaker apparatus controlled from a more or less remote point and my invention relates to a system in which a switch or circuit breaker is moved to normal position (as circuit closing position) by an electrically operated motive device, such as an electric motor, the switch or circuit breaker being adapted to be tripped either automatically or at the will of an operator whose control switch is located at a point more or less remote from the switch or circuit breaker.

It is the object of my invention to provide, particularly in apparatus and in a system such as above referred to, means which shall insure the disconnection of the motive device from the switch or circuit breaker when the switch or circuit breaker has reached normal position, even in the case where the circuit of the motive device is not interrupted, or where the gearing or driving mechanism under the ordinary control sticks or refuses to become disconnected from the switch or circuit breaker, or in any other emergency.

\Vith this object in view, my invention resides in an apparatus and system such as above referred to, in whichv means are provided for guaranteeing or insuring that the motive device shall be positively disconnected from the switch or circuit breaker even in the event of failure of a switch to open the circuit of the motive device, in the event of the coupling between the motive device and the switch or circuit breaker failing to become disconnected under the usual control, or in any other emergency.

My invention resides also in other features hereinafter described and pointed out in the claims.

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

Figure 1 is a side clevational view of the switch or circuit breaker and its operating motor, portions being shown in section.

Fig. 2 is a side elevational View, on larger scale, of the motor control switch. Fig. 3 is a top plan view of the localizing and other control switches. Fig. 4 is a plan view showing the conducting and insulating parts of the movable member of the switch shown in Fig. 3. Fig. 5 is adiagram of the circuits and connections of one atrangement of my invention.

In Fig. 1, a base orswitchboard I, preferably of insulating material, such as marble or slate, has secured thereon the main terminal blocks 2 and 3 in electrical communication with the studs 4 and 5, respectively, extending through the base 1 and provided with nuts 6. Adapted to engage and bridge the main terminals 2 and 3, is the main movable contact member 7, here representing a laminated contact member, secured u on the arm 8 pivoted at 9 to the housing or Bracket 10. A spring 11, in tension in the position shown in Fig. 1, is connected at its one end to the pivoted arm 8, and at its other end to v the member 22. Secured upon and in electrical communication with the upper terminal block 2 are the stationary metallic shunt contact 12 and the stationary shunt carbon contact 13, the latter pivoted at 14 on the bracket 15. Carried by the arm 8 are the movable metallic shunt contact 16 and the movable carbonshunt contact 17 adapted to engage, respectively, the contacts 12 and 13. The contacts 16 and 17 are in permanent electrical communication with the lower main terminal block 3 by the flexible conductor 18. Pivoted at 19 on the arm 8 is the roller 20 engaged by the cam surface 21 on the cam member 22 pivoted to the housing or bracket 10 at 23 and having the outward extension 24 carrying the operators grip or handle 25. On a projection 26 on the lever 24 is pivoted a roller 27 adapted to be engaged by the latch 28 pivoted to the bracket or housing 10 at 29, the latch 28 having a rear extension formed as a jaw loosely embracing the pin 30 for limiting the movement of the latch 28. Pivoted at 29 is the latch actuator 31 similarly limited as to its movement and carrying an adjustable screw 32 adapted to strike upon the top of the latch 28. The latch 28 and its actuator 31 are urged in counter-clockwise direction by a spring or springs, not shown, coiled about pivot 29. The latch actuator 31 has a tail 33 disposed in the path of travel of the l'llGlllbGl 3i pivoted at and l crank S3 in a clockwise rotation of the carrying the armature 36 of an electrounaejnetic tripping overload coil, be any su ble windi g disposed either in the same cir uit with the main terminals and or in anyother circuit, the armature 3G beingresponsive to any pr determined electrical condition. Attached to the tail 83 of the latch actuator 31 is a rod 38 (llS- posed in the path of travel of the armature 39 pivoted at so and cooperating with the poles ll of another electro-magnet whose winding is Supported upon'the base 1 below the switch circuit breaker above descrilwd or in any other suitable position, a my tire device, such as the electric motor Til on the upper end of whose shaft 4:3 is

cured one member 44 of a universal joint" whose other member l5 l8 secured upon the shaft e6, whose upper end has a bearing in the member 47 carried by the link 4-8 pivoted at its lower end zit 19, and at its upper end at 50 to the toggle link 51 which is, in turn, pivoted at 52 to the second togg link pivoted at 54 to a bracket or housing Secured upon the shaft ,6 and rotated by motor M 15 the worm 56 adapted to mesh with the gear 57 pivoted at 58 on the bracket or housing 55. Attached to the gear member 51' is crank 59 to which there is pivoted at 60 a rod 61 having more or less lost motion with respect to the member 62 within which is inclosed the head 63 of the rod (31, a spring 6 t engaging under the head (1 and against the bottom of the member 62. The member 62 is pivoted to the operating lever 2sat 65 Supported on the housing or bracket is a jacketed solenoid Whose winding 66 surrounds the magnetizablc core (57 carrying the rod 68 having near its upper end the elongated opening 69 in which engages a pin 70 carried by the toggle link 53. ht the upper end of the rod (=8 is a stop or buit'er surface 71 adapted to engage the under side of the member 72 extending HCIOSS the bracket or housing 55, or any other part fixed to housing 55. Supported upon but insulated from the toggle link 53 are the conducting portions Tel aiid 75 (in electrical communication with each other) of the movable member of control switches, the insulating material 75 being provided for purposes hereinatter described Supported upon the member 72 extending across the top of the housing 55 and insulated therefrom by material 77 are the brushes 78, 79, SO and 81. all insulated from each other. i

Pivot-ed 58, independently of the gear wheel 57, is a bell crank consisting of the arms 82 and 83, :1 lug 8- carried by the gear wheel 57 is adaptedto engage the hell device which may be a simple 1 as 3? Fig. 5, or which may year wheel 57, as viewed in Fig. 1, and a lug 85 carried by the gear wheel 57 is adapted to engage the bell crank 82, Si) in counterclockwise 'moycmcnt oi the gear wheel 5T. The arm 83 of the bell crank is adapted to engage, under the conditions hereinafter rcici rcd to, the end Sh ol' the toggle link 51; and the arm 8-2 of the bell crank has pi ctcd thereto at a rod pivoted at Sil to the arm oo, connected to the spring winding member oi the motor control \\'ll(ll shown in Fi e. 2. llhelcng'th oi the rod 88 may be adjusted by means of men'iber fill.

The motor control switch 92, as shown in 2, is secured upon the side ot the housing 55 and C(llllPllFtX the moyalde contact member adapted to engage the stationary contact member tl-ilwhich may yield in opposition to spring 93. ll'hen the switch '02 is closed with the contacts 9 and it in engagen'ient, it locked, the actuating spring 96 being previously wound up by the opening of the main switch or circuit breaker. ready to snap the contact 93 away from con tact- 9 1 when released or unlockcth this switch being preferably locked only in circuit, closing position.

Between the main terminal blocks 2 and 3 of the main switch or circuit breaker there are secured upon the base 1 the separated contacts 97 and 98 adapted to be bridged by the bridging contact 99 movable with the main laminated contact member 7. llhen the main switch or circuit. breaker is open the bridging contact 99 moves away from the contacts 97 and 98 to interrupt the circuit of the tripping coil 4-2 controlled thereby.

Referring to Fig: 5 100 and 101. are the positive (for example) and the negative (for example) conductors, respectively, of a circuit or network from which energy dcrivedfor controlling the main switch or circuit breaker, whose terminals 2 and 3 communicate by conductors Q and 3 re- 'spectiyely with the sam network or with any other circuit or network. Andthc switchs or circuit broakei"s own tripping coil 37 may be connected in the r-tllllti circuit with the main switch or circuit breaker or in any other circuit. and may be responsive to 'any predetermined electrical condition.

From conductor 100 extends conductor 102 to the lever 103 of the operatofs switch D, which may be located at a point more or less remote from the main switch or circuit breaker which itis to control. The operating lever 103 carries the contacts 10-1 and 105 in electrical communication with each other and with the conductor 102 and adapted to engage, respectively, the stationary contacts 106 and 107. The contacts 101 and 105 are normally in the position shown in F ig. 5 out of engagement from contacts 106 and 107, a spring or gravity being uti lized to return the operators lever 103 to the central position shown. Between contact 106 and conductor 102 are connected the resistance 108 and the indicating lamp 100, it being understood that the resistance 108 may be omittedwhcn the apparatus is used in connection with a low potential circuit. Similarly, between contact 107 and conductor 102 are connected the resistance 110 and the indicating lamp 111, it being understood that the resistance110 may be omitted on low potential circuits. From contact 100 extends conductor 112 to'one terminal of the trip coil 12 whose other terminal connects to thc'contac-t 97, the contact 98 con nccting with conductor 113 connected with.

the negative conductor 101. The conductor 113 extends also to the contact 04 of the motor control switch, and the movable contact 93 of the motor control switch is con nected by conductor 11s with one brush 115 of the armature 116 of the motor M. The other brush 117 is connected to one terminal of the field winding 118 of the motor M and also to one terminal of the solenoid winding 66. The other terminal of the field winding 118 connects by conductor 119 with the brush S0. The other terminal of tlic solenoid winding 66 connects by conductor 120 with brush 81, the resistance 121 being connected across the brushesSO and 81 by conductors 119 and 120. Brush 79 is connected by conductor 102 with the positive conductor 1.00, and brush 78 is connected by conductor 122 with contact 107 of the operators switch D.

The operation is as follows: With the main switch or circuit'breaker in circuit closing position .as shown in Fig. 1, upon the occurrence of any predetermined electrical condition in the circuit in which its tripping coil 37 is connected t'he armature 30 will be'attracted and rotat! in a counterclockwise'direction about its pivot 35, as viewed in Fig. 1,. causing the member 34; to strike the under side of the tail 33 of the latch actuator member 31 to move the same in opposition to its spring and to cause the screw 32 to engage upon the top of the latch 28 to depress thesame in opposition to its springtorelcase roller 27, with resultant; unlocking of the switch or circuit breaker. The spring 11 being under tension, the main contact member swings outwardly on its pivot 9 away from contacts 2 and 3, the operating member 22 and its lever handle 24 rotating in a counter-clockwise direction about'thc pivot 23. After the main contact 7 separates from main terminal blocks 2 and 3, contact 16 separates from contact 12, and finally, contact 17 separates from contact 13,- the final are occurring at these carbon contacts. The contacts 7, 1G

and 17 continue to swing outwardly from the base but about pivot 0 until the circuit is completely ruptured, in which positim the operating lever is elevated, the lever 21 having carried upwardly with it the connecting rod (31 and rotated the gear wheel 57 in a counter-clockwise direction about its pivot 58 ear 57 being free to rotate inde pendently oi actuation or control by the motor M, since the worm 50 is out of mesh. W hen the main switch or circuit breaker is in the closed position, as shown in F 1, the switch 07, 08, 09, closed and there is a circuit from positive conductors 100 and 102 through lamp 109, resistance 108, contact 106, conductor 112, tripping coil 12, switch 97, 98, 09, conductor 11 53, to the negative conductor 101. Current flows through lamp 10$) causing it to glo and indicate at the distant switch I) that the main switch or circuit breaker is closed and maybe tripped by the tripping coil 42. l't' the operator desires to trip the main switch or circuit breaker he moves the lever 103 to bring contacts 10-1 and 106 into engagement with each other, whereupon lamp 100 and resistance 108 are short circuited, thus removing trom the circuit of the trip coil 42 considerable resistant: with the result that a greater current flows through the coil 412, such increased current being now suliicicnt to cause the up ward attraction of armature 30 about its pivot 4-0, causing the armature 30 to lift the rod 38 and, therefore, the tail 33 of the latch actuating member 31, which then depresses the latch 28 to unlock the main switch or circuit b16t1l(81,t1$ before described, whereupon the main switch or circuit breaker flies to open circuit position. I As the main switch or circuit breaker moves to. circuit interrupting position, switch 97,

.98, 09 is opcncd and, therefore, no current will .flow through lamp 100; the lamp being new dark indicatesthat the main switch or circuit breaker is in open circuit position.

As the main switch or circuit breaker opens, the gear wheel 57 is rotated in a counter clockwise direction, as viewed. in Fig. 1, due to the upward travel of the connecting rod (51 attached to the lever 21. The lug 85 on the gear wheel 57 engages the arm of the bell crank lover moving the bell crank in a counter clockwise direction about the pivot 58 rotating the arm 00 of the motor switch in such directiop' as to bring contact 03 into engagement: with con \tact 9-1, and to lock the same in engagement by detent 90?. There is, they, a closed path from the positive conductor 100 through I conductor 102, lamp 111, resistance 110, contact 107, conductor 122, brush 78, contact 74, contact 75, ( contacts 74 and 75 being in pet mancnt electrical. connection with ach other) brush 81, conductor 120, thence through winding 06 in parallel with resist- &

ance 121 and motor field winding 11-8, motor armature 116, and through motor switch 023, .11., which is now closed, as above described, through conductor 113 to the negative conductor 101. The lamp 111 now glows and indicates that the parts are in condition to allow closure of the same by the motor M.

To close the main switch or circuit breaker, the operator moves the lever 103 of the distant switch D to bring contact 105 into engagement with contact 107, whereupon the. lamp 111 and resistance 110 are short circuited, with resultant increase of current through the circuit last traced through the motor M. The resultant increased current sullices to energize the solenoid whose winding is 00 to a degree to lift the core (37 and to move the toggle link 53 upwardly, with the result that the worm 56 is brought into mesh with the gear 57. The upward travel of the core 07 is limited by the stop 71 engaging on the under side of the plate 72 extending across the housing 55. The toggle, however, has been raised to the position where the ,pivots 5 1, and are in the same stramht line, or the pivot 52 slightly above the imaginary straight line joining the centers of pivots 51 and 50. Simultaneously with the energization of winding 66 the motor field 11S and motor armature 116 have been energized and the motor starts to rotate slightly before the worm 56, rotated by the motor M, comes into mesh with the wheel 57.

As the toggle link 53 has been rotated in a counter clockwise direction about its pivot 5-1 by the solenoid core (37,as above described, the brush 78 passes off of contact 7% on to insulation 76, simultaneously brushes T9 and 80 pass off of insulation 76 on to the contact 75, and the brush 81 continues in engagement with contact 75. The result is that resistance 121 is short circuited and the contacts 105 and 107 of the distant operators switch 1) are robbed of control. That is to say, once the closing movement of the main switch or circuit breaker has been initiated by the distant switch, the closing movement continues in spite of the distant switch, since now the current will flow from positive conductor 100, through conductor 102, through brush T9, contact 75, conductor 120, through the solenoid winding 66, and through brush 80 and conductor 110 through the motor field 118. And even if the operator at the distant switch should immediately separate contacts 105 and 107 after having initiated the closing movement, the closing movement will continue without possibility of interferonce by distant switch D.

As the mot/orM continues its rotation, gear wheel rotated in a clockwise direction about its pivot 58 causing rod 01 to be pulled downwardly, with a resultant clockwise movement of lever 24: and cam meniber 22 in a clockwise direction about pivot 23, the cam surface 21 engaging main switch or circuit breaker in closing position. "With this movement of the gear wheel 57 the log 84 engages the arm 83 of the bell crank, rotating the same in a clockwise direction about its pivot 58 causing the arm 82 to push the rod 88 toward the left acting on the arm 90 to trip the snap switch 93, 9 1, with their resultant quick separationto break the circuit of the motor M and also the circuit of the solenoid winding 06. The motor M is accordingly de'e'nergizcd, as is also the solenoid whose winding is 66, and the core 67 drops. Inasmuch as the downward collapse of the toggle 51, 53, removes the worm 56 from mesh with wheel 57, the construction. shown is'such that the weight of the core and attached parts is exerted in a direction to move the worm wheel out of mesh, that is to say, to the safe position.

And inasmuch as the toggle 51, may be slightly overtraveled, as above stated, the core 6'? fails a short distance, due to the slot (39. before the pin 70 is engaged, delivering a blow to pin 70. When the pin 70 is engaged it carries the toggle downwardly across the dead center position, and the further collapse of the toggle is insured by the action of the. weight of core 67 and attached parts to positively remove the worm 56 from mesh with gear 57.

During the collapse of the toggle, the contacts 71 and 75 and insulation 70 are moved in a clockwise direction about pivot 51, with the result that brush 78 rides oil of insulation 70 on to contact 7 1, brushes 79 and 80 leave contact 75 and rest on insulation 70, while brush 81 continues in engagement with contact 75. The motor switch 93, 91 being now open, the circuit through the. lamp 111. is interrupted and as this lamp is extinguished it indicates to the operator at thedista'nt switch D that the main switch or circuit breaker has reached circuit closing position. And as the main switch or circuit breaker reaches circuit closing position, switch 97, 98, 99, is again closed with the result that lamp 109 will again glow giving a further indication that the main switch or circuit breaker is closed.

If,'for any reason the motor switch 93, 94- should fail to open, as the main switch or circuit breaker reaches full circuit closing position, the motor M would continue to rotate and continue to pull down on the rod -61, with the result, that some part of the apparatus would be strained or damaged,

even to the extent of making it impossible for the main switch or circuit breakerto open even when tripped by its own. tr pping mechanism. The niotor M becomes disconnected from the ear 57 however, due to the arm 83 of the bell crank being positively driven by gear 57, the outer end of the arm 83 engaginglt-he end 86 of the toggle I lever 51 to positively collapse the toggle and remove the worm 56 from mesh with wheel 57a moment after the motor switch 93, 94 should have opened. The bell crank serves in this case as a emergency device to positively mechanically disconnect the motor from the main switch or circuit breaker very promptly after the main switch .or circuit breaker has reached full circuit thus positively disengaging the motor M' from the main switch or circuit breaker when the latter has reached normal position, as, for example, circuit closing position.

Thelresistance 121, in circuit only at the initiation of. the closing movement of the main switch or circuit breaker, serves to force a greater current to How through solenoid winding 66, and,therei"ore, more power- :t'ully energize the solenoid. (56 at the moment 1 of starting than during the later periods of the closing movement; It is during the early moments of the circuit closing movement that the solenoid 66 should be most powerfully energized to start and lift the core 67 and attached parts. This resistance serves also to make the motor M start more smoothly and gradually. After the resist- 'ance 121 is cut out, the current through the solenoid winding 66 is still sufficient to hold the core (37 in the elevated position. Resistance 121 also serves to prevent the motor M from racing in case the motor switch 93, 94 fails to open.

The motor, switch contact 94 may be yieldingly mounted, as above described, so that with different adjustments of the length of the rod 61, or with different adjustments of other parts, the contacts 93 and 94 will nevertheless engage; and this yielding mounting of contact 94 obviates the necessity for nicely positioning the motor switch contacts.

\Vhat I claim is:

.1 The combination with a main switch or ing the circuit breaker, of a motive devicefor moving the same to-iiormal position, said switch or circuit breaker movable .to another position indepcndcht of actuation or control by said motive device, a disengageable mechanical connectionbetween said motive device and said main switch or breaker, a switch controllingsai'd motive device, and a member having post motion connection with said motive device through said mechanical connection for: iactuating said switch to deenergize said motive device when said main switch or breaker has reached normal position. i

2. The combination with a main switch or circuit breaker, of a motive device for moving the'same to normal position, said main switch or circuit breaker movable to another position independently of actuation connection with the movable member of said main switch or circuit breaker for actuating said switch when said main switch or breaker moves to said other position.

The combination with a main switch or circuit breaker, of a motive device for actuating the same, a discngageal'ile mechanical connection between said motive device and said main switch or breaker, a lswitch for breaking the circuit of said motive device when said main switch or circuit breaker reaches normal position, and, a member actu ated by said motive device for breaking said mechanical connection upon "failure of such switch to break the circuit of said motive device.

4. The coml'iination with a main switch or circuit breaker, of a motive device for mov same to normal position, electroresponsive means for mechanically connecting said motive device and said main switch or breaker, a switch for dcenergizing said electro-responsive means to disconnect said motive device from said main switch or breaker when the latter has reached normal position, and a member actuated by said motive device for disconnecting said motive device from said main switch or breaker upon failure of said motive device to be come disconnected from said main switch or breaker upon deenergization of said electroresponsive means.

5. The combination with a main swltch or circuit breaker, of a motive device for actuatlng the same, a discngagcablc mecham actuated by sa d motive device for breaking said mechanical connection when said switch fails to dec ergi'ze said motive device.

6. The combination with switch, of a motive device therefor, 11 diseng geablc mechanical connection between said motive device and said main switch, and a member driven by said motive device when said mechanical connection is in engagement, said member having lost motion with respect to said main switch and adapted to break said mechanical connection.

7. The combination with a switch, of a motive device therefor, a member driven by said motive device, a second member driven by said member, a third member driven by said second member and adapted to disengage said'first and second members from each other, and a switch for deiinergizing said motive device before disengagement oi said first and second members.

8. The con'ibination with a switch, oi a motive device therefor, a member driven by said motive device, a second member driven by said member, and a third member hav in; lost motion with respect to and driven b v said second member for disconnecting said first and second members from each other.

9. The combination with a main switch or circuit breaker, of a motive device therefor, a disengagezble mechanical conncetirm between said motive device and said main switch or breaker, a switch controlling; said motive device, and a member for operating said switch and for breaking said mechanical connection upon failure of said switch. to deeuergize said motive device.

10. The combination with a switch, of a motive device therefor, disengageable driv ing and driven members intervening between said motive device and said switch,v

and a member having lost motion connection with and driven by said driven member for disengaging said driving and driven memhers.

11. The combination with a niain switch or circuit breaker, of. a motive device. therefor, driving and driven members intervening between said. motive device and said main switch or circuit breaker, a switrh controlling said motive device, and a member having lost motion with respect to and driven by said driven member for actuating; said switch and thereafter disconnecting id driving and driven members from each other.

12. The combination with an electric switch, of a motive device for moving the same to normal position, a discngatfcable connection between said motive device and said switch. the movement of said switch to abnormal position being independent or" either actuation of control by said motive device, and a member actuated by said motive device for disconnecting the same from said switch when said switch has reached normal position.

The combination with a main switch, of a motdr for actuating the 'ttUlG, a worm and intervening between said motor and switch, means for throwing said worm into mesh with said gear, a switch actuated when said main switch reaches normal position for controlling said motor, and a member for throwing said worm and gear out of mesh when said switch fails to deencrgizce said motor.

1 The combination with a main switch, o a iatch for locking the same in normal osition, a motor for moving said main .iwiteh to normal position, disengageable caring intervening between said motor and aid switch, a switch for decnergizing said motor actuated when said main switch reaches normal position and is latched, and a member driven by said motor when said gearin is in en "a ement for disenga in .v D is, l) C) said gearing after said motorcontrolled switch has been actuated.

The combination with a switch, ot a motor for actuating the same, disengageable gearing intervening between said motor and said switch, and an independent member driven by said motor through said ,g'mirin; when in engagement for disengaging said gearing upon overt ravel of said motor.

16. The comliiination with a switch, of a motor, disengageable gea ring intervening between said motor and said switch, and a member having lost motion with respect to i and driven by the partot the disengage-able gearing connected with said switch for disengaging said gearing upon overtravcl of said motor.

11'. The combination with a main switch or circuit breaker, of a motor, disengageable gearing intervening between said motor and said main switch or breaker, a motor switch, and a. member driven by the part oi said disengageabie gearin connected with said main switch or breaker for actuating said motor switch and for disengaging said gearing.

The combination with a main switch or circuit breaker, of a motor, disengageablc gearing intervening between. said motor and said main switch or breaker, a motor switch, and a member having lost motion with respect to and driven by the part of said disengageable gearing connected with said main switch or circuit breaker for actuating said motor switch and for disengaging said gearing.

' 'l lhe combination with a main switch or circuit breaker. of a motor, disengagcablc gearing intervening between said motor and said mainswitch or breaker. a. motor switch, and member driven by the part of said dise igageable gearing connected with said main switch or breaker for actuating said motor'switch and for disengaging said gearing, the movement of said main switch or breaker when disconnected from said motor serving to actuate said memberto close said motor switch.

20. The combination with a main switch or circuit breaker, of a motor, disengageable gearing intervening between said motor and 'said main switch or breaker, a motor switch,

and a member having lost motion with respect to and driven by the part of said disengageable gearing connected with said main switch or circuit breaker for actuating said motor switch and for disengaging said gearing, the movement of said main switch or breaker when disconnected from said motor serving to actuate said member to close said motor switch.

21. The combination with a switch, of a motor, a worm and gear intervening between said motor and sa t switch, and a member driven by said gear for moving said worm out. of mesh.

22. The combination with a switch, ot a motor, a worm and gear intervening between said motor and said switch, and a member driven by said gear for moving said worm out. of mesh when'said motor overtravels.

The combination with a switch, of

motor, a. worm and gear lHtGl'VCHiHg between said motor and said switch, and a member having lost; motion with respect to and driven by said gear for moving said worm out of mesh.

2 The combination. with a switch, of a motor, a worm and gea r intervening between said motor and said switch, and a member having lost motion with respect to and driven by said gear for moving said worm out of mesh when. said motor overtravels.

Q5. The combination with a switch, of a motor, a worm. and gear intervening between said motor and said switch, a togglocontrolling said worm, and a member actuated by said motor for breaking said toggle to dis engage said worm trom said gear.

26. The combination with a switch, of a motor, a worm and gea r intervening between said motor and said switch, a toggle control ling said worm, and a. member actuated by said gear tor breaking said toggle to disengage said \Vtll'lltflOlll said gea 1 27. The combination with a main switch or circuit brcalm r,-ot a motor, a worm and gear intervening between saidmotor and said main switch or breaker. a toggle controlling said worm, electro-niagnetic meansv controlling said toggle, a switch controlling said electro'magnetic means. and a member driven by said motor tor breaking said toggle to disconnect said worm and gear and tor opening said. switch.

28. The combination with a main switch or circuit breaker, of a motor, a worm and. gear intervening between said motor "and said main switch or breaker, a toggle con trolling said worm, electro-inagnetic means controlling said toggle, a switch controlling said electromagnetic means, and amember having lost motion with. respect to driven by said gear for breaking said; tog" is to disconnect said'worm and gear and fol opening said switch. I

29. The combination with a switch, of motor, a worm and gear intervening between" said motor and said switc a pivoted level} I. fordisengaging said worm from saidigea'r, and means on said gear for engaging said lever. i

30. The combination with a' switch, of a motor, a worm and gear intervening between said motor and said switch, a pivoted lever for disengaging said. worm from said gear, and means on said. gear for engaging said lever upon over-travel of said motor.

31. The combination with a. main switch or circuit breaker, of a motor, worm and gear intervening between said motor and said main switch or circuit breaker, a motor control switch, a lever for actuating said motor switch and for disengaging said worm from said gear, and means on saidgear for engaging said lever in one direction to close said motor switch, and in opposite direction to engage said lever to first control said motor switch and thereafter disengage said worm from said gear upon overtravel of said motor.

32. The combination with a switch, of a motor, a worm and gear intervening between said motor and said switch, a lever pivoted concentrically with said gear, and means on said gear for engaging said lever to disengage said worm and gear.

33. The combination with a switch, of a motor, a worm and gear intervening between said. motor and said switch, in. lever pivoted concentrically with said gear and having lost motion with respect thereto, and means on. said gear for engaging said lever upon evertravel of said motor to disengage said worm from said gear.

34-. T he (.OIDbil'lZltllOll with a main switch or circuit breaker, ot' a motor, a worm and gear intervening between said motor and said main switch or circuit breaker, a motor. switch, a lever pivoted eomizentrically with said gear, and means on said gear for engaging said lever to control said motor switch. and to thereafter disengage said worm from said gear nipon continued move ment of said motor.

35. The combination with a switch, of a motor, a worm and gear intervening between said motor and said switch, a toggle for =l n mesh with said gear, and a member actuor aleing said toggle.

30. The combination with a main switch,

motor for actuating the same, a worm gear intervening between said motor worm, a mcinber for extending said toggle to over-traveled position to hold said worm in mesh with said gear, said member having lost motion with respect to said toggle, an electromagnetic winding for actuating said member, and an auxiliary switchcontrolling simultaneous energization of said motor and said electromagnetic winding, andmeans actuating said auxiliary switch after predo termined movement of said main switch, whereby said motor and said electromagnetic winding are de'e'nergized and said member strikes a blow to collapse saidtoggle. to positively disengage said worm and gear.

. 37. The combination with an electric switch, of a gear for actuating the same, a worm for driving said gear, a motor for driving said worm. a universal joint be tween the shaft of said motor and said worm, a toggle connected to said worm, electromagnetic means for actuating said toggle to bring said worm into mesh with said gear, and a member driven by said gear for disengaging said worm from said gear upon overtravel of said motor.

The combination with a main switch, of a motor for actuating the same, an operator's switch for controlling said motor, a worm and gear intervening between said motor and said main switch, means for shifting said worm into and out of mesh with said gear, a switch actuated by said worm shifting means for maintaining the circuit of said motor closed independently of said operators switch, and a member driven by said motor for disengaging said worm from said gear upon overtravcl of said motor.

39. The combination with a main switch, of a motor for actuating the same, a worm and gear intervening between said motor and said main switch, means for throwing said worm into mesh with said gear and out of mesh when said motor stops, a motor circuit switch actuated by said motor to interrapt the circuit of said motor, a connection from said main switch to said motor switch to restore the circuit of said motorupon the opening of said main switch, and a member for disengaging said worm from said gear upon overtravel of said motor.

id. The combination with an electric switch, of a motor, a worm and gear intervening between said motor and said switch, l a toggle having a link attached to saidj worm. and a member driven by said motor to engage a toggle link to disengage said iwrm from said sear.

zed by said motor upon its overtravel for i said switch, a toggle for moving said i i ii. The combination with an electric switch, of a driving motor therefor, a disengageable mechanical connection between said motor and said switch, electromagnetic f'means controlling said mechanical connection, a resistance in circuit with said motor, and the winding of said electromagnetic ancans connected in parallel with a conductor including said resistance.

2. The combination with an electric switch, of a driving motor therefor, a. disengageable mechanical connection between said motor and said switch, electromagnetic means controlling said mechanical conneclion, a resistance in circuit with said motor, the winding of said electromagnetic means connected inparallel with a'conductor including said resistance, and a switch controlled by said electromagnetic means after current has been admitted to said motor for cutting out said resistance.

The combination with an electric switch, of a driving motor therefor, a dis engageable mechanicalv connection between means controlling said mechanical connection, and a switch controlled by said electromagnetic means for cutting out said resistance.

4.4-. The combination with an electric switch, of a driving motor therefor, a disengageable mechanical connection intervening between said motor and said switch, electro-nnignctic means controlling said mechanical connection, a resistance associated with the field winding of said motor, and the winding of said electromagnetic means connected in parallel with said field winding and said resistance.

4-5. The combination with an electric switch, of a driving motor therefor, a disengageablc mechanical connect-ion intercleclro-magnetic means controlling said mechanical connection, a resistance associated with the field winding of said motor, and the winding of said electromagnetic means connected in parallel with said field winding and said resistance, and means for cutting out said resistance after said motor starts.

4:6. The combination with an electric switch, of a driving motor therefor, a discngagcable mechanical connection intervening between said motor and said switch, electromagnetic means mechanical connection, a resistance associated with the field winding of said motor, and a switch controlled by said electro- ,magnelic means 'for cutting out said resistance.

ii. The con'ibination with an electric switch, of a motor for driving the same, a discngageable mechanical connection be- 1 tween said motor and said switch, electrosaid motor and said switch, electromagnetic veiling between said motor and said switch,

controlling saidmagnetic means controlling said mechanical connection a resistance connected in series with a field windin of said motor, and the winding of said elec ire-magnetic means connected 1n parallel with and resistance and field winding.

48. The combination with an electric switch, of a motor for driving the same, a disengageable mechanical connection betweensaid motor and said switch, electromagnetic means controlling said mechanical connection, a resistance connected in series with a field winding of said motor, and the windin of said electro-magnetic means connected in parallel with said resistance and said field winding, and means controlled by said electro-magnetic means operative upon the starting of said motor for cutting out said resistance. 1

49. The combination with an electric switch, of a motor, a disengageable mechanical connection intervening between said motor and said switch, a toggle controlling said mechanical connection, and a switch controlling said motor having a movable contact carried by a member of said toggle.

50. The combination with an electric switch, of a motor, a disengageable mechanical connection intervening between said motor and said switch, a toggle controlling said mechanical connection, and a plurality of switches controlling said motor and the actuation of said mechanical connection having their movable contacts carried by a member of said toggle.

In testimony whereof I have hereunto afiixed my signature in the presence ofthe 'two subscribing witnesses.

WILLIAM M. SCOTT.

' Witnesses: I ELEANOR T. MCCALL, ANNA E. Srnmnocx.

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