US1585517A - Available cop - Google Patents

Description

BEST AVAfLABLE COP May 18 1926. 1,585,517

E. B. THURSTON SWITCH MECHANISM Filed July 13 1921 3 Sheets-Sheet l fi fimw BEST AVAlLABLE COP May 18 1926.

E. B. THURSTON SWITCH MECHANISM Filed July 13. 1921 3 SheetsSheet 2 BEST AVAiLABLE COP May 18 1926. r

E. B. THURSTON SWITCH MECHANISM Filed July 13. 1921 3 Sheets-Sheet 5 Patented May 18, 1926. T -ABLE COP. 1,535,517

UNITED STATES PATENT OFFICE.

ERNEST B THURSTON, OF TOLEDO, OHIO, ASSIGNOR TO THE HAUGHTON ELEVATOR & IlIACHINE 00., OF TOLEDO, OHIO, A CORPORATION OF OHIO.

SWITCH MECHANISM.

zpplication filed July 13, 1921. Serial No. 484,429.

This invention relates to electromagnetic motor operated switches.

This invention has especial utility when incorporated in connection with polyphase electric current torque or high internal resistance switch operating motors for elevator service.

Referring to the drawings:

Fig. 1 is a wiring diagram wherein the alternating current is three phase three wire, incorporated for elevator service, with the controller on the elevator car, disclosing an embodiment of the invention; I

Fig. 2 is a front elevation of the switch board for the wiring installation of Fig. 1';

Fig. 3 is a detail View of a flexible coupling; J j p p 7 Fig. 4 is a cross section of the accelerator switch cam shaft showing the general relation of the three cams thereon; v

Fig. 5 is a detail viewofthe stop carrying bracket for the weights;- c i. V

.Fig. 6 is a side elevation of the main motor switch cam, contact carrying arm, and cam engaging means; p

Fig. 7 is a section ofthe direction switch rock shaft with arm for picking up the weights; and I Fig. 8 is a View of the direction switch actuating cams.

In the elevator shaft 1 having landings 2 is operable elevator car 3 carried by hoistline 4: passing about drum 5 over idler 6 to counterweight 7. Alternating'electriccurrent supply is shown which may be sixty cycle, three phase, by way of supply lines 8, 9, 10. From the line 8 branch line ll extends past upper overtravel switch 12, thence by line 13 past lower overtravel switch 14., thence by line 15 past emergency switch 16 in the car 3, thence by line .17 past lower final or stopping switch 18 by way of line 19 to contact 20 on arm of controller 21 in the cal-'3. This contact 20 on the controller 21 when in off position connects across to line 21 past upper final or stopping switch 22 thence b line 23 to connect with the line 17 The emergency switch 16 is accordingly in the lines for both overtravel limit switches as to the supply from the line 8. From the supply line 10 is branch line 24 past upper over-travel switch 12, thence by way of line 25 past the lower overtravel switch 14, thence by line 26 past the lower or final or stopping switch 18, and thence-by way of line.

27 to controller carried bottom contact 28 on the controller 21. Should this lower final or stopping switch 18 be open, there is branch line 29 from the line 26 by way of the upper stopping switch 22 extending from thence by line 30 to the lower contact 28 of the controller 21. Accordingly, in shifting the controller 21 to the left, the contact 20 is moved away from the line 21 and the contact 28 is moved away from the line 30. This automatically cuts out the upper final switch 22.as to the controller 21, for this shifting of the controller to the left'is effective for operating the car 3 for downward travel, Reverse shifting for car travel upward cuts out the switch'18'.

The contact 20 is in this movement brought to connect'the line 19 with line 32 extending to line Simultaneously with this'shifting of the contact 20 of the controller 21, the contact 28 of the controller'2l connects the line 27 with line 34. These lines 33, 34, ex-

tend to main switch operating'motor 35, the

third line,tothi'smotor"bei1 ig connected by way of line-36 to line 37,contact 38 on the accelerating switch, and thence byline 39 to line 40 connecting with the supply line 9. This main switch motor has shaft 41 pro"- videdwith flexible connection 42 to'rock shaft 43' carrying cam 44' efiective for throwing switch contacts '45, 46," of the main switchj Further shifting of this controller 21 in thecar3 to the left brings the contact 20- to line 47 extending to line 48', while simultaneously the contact 28 is swung to line 50. These lines 48, 50, extend to direction switch operating motor 51 having a third line 52 therefrom connected with the line from the supply line 9. j This energizing of direction switch torque motor 51 operates its motor'shaft 53 having flexible coupling 54 with rock shaft'55'carrying direction switch operating cams 56, 57. The cam 56 for down direction travel of the car 3 throws contacts 58, 59. The contact 59 is effective by way of line 60 from the supply line 10 by the main motor switch contact 46 to line 61. Simultaneously the sup} ply line 8 is connected by contact 58 with line 62. The throw of the main switch contact IB-connects supply True? 9] withline .63. These lines 61,62, 63, extend to'thr'ee pham slip ring main elevator motor 64. From the line fi2 eXtends-the linefif) togcoil-fifl thenee by line 67 to line. 133-. Accordingly-simultaneously withfthe energizing of the field coil from the lines 61, 62, 63, of this inotor l, coil 66 releases bral-ze 68 so that this motor 04: may operate shaft 69, and through worm speed reduction gearing 70 rotate the drum in a direction to lower the car 3 in the Shaftl.

The line 61 has branch 71; the line 62, branch 72, extending to'accelerator switch motor 73 having a third line '74 therefrom connected to line 63. 'The accelerator switch torque motor 73 is on shaft 75 having pinion 7 6 in mesh wi'fligear-Tr for twoto one'speed reduction driving of camshattfifi carrying cams 1'79, 80, 81. The 'travel 'of. this .cain shaft 78 is resisted. This resistance is herein shownto embody a disk 82. having flexible connection 83 with piston 8. in cylinder 85 as a .dash pot device, the "le'aklageof "which may be adjusted. by yalveSS. Accordingly, the main. switch operatin torqiie motor 35 is first effective,- land ftheponti'olie'r 121' shifted to the second position, the "direction switch torque motorfril -'beconiesifiective. 'Simultaneouslyjwith the operationof this direction. switchmotor '51, i accelerating switch motor'73 i actuated. As the shaft 75, retarded by 'the' dash'pot dsviee' 82, 83, B 1, 85, 86, starts operation there 'ifsathrowingiot contact 87 for cutting ontgtlie first portion of starting resistance-.88 in the main motor 6 1. At the determined perio'dlof there'- after in the operationfo'f thej'shaft 78, coritact 89 cuts out an additional portion hfthe resistance 88 and this is foll ow'ed' contact .90 cutting out the balance of. the resistance 88 as the motor 16t thus comes to speed. I"

The movement o'fthe' contact. 87 I carries with it the contact '38, thereby opening the line initially effective for completing the pluralityof phases "for operating the main switch motor 35. However, inasmuchas the mainswi'tch is thrown, the-mama d5 carries with'it c'ontactlj91maintaining closed the circuit .betwe'e'ni lines '37, e0, so that the action of theaccelerating "switch-does not eiiect an opening of the mainswitch." The main motor 61 may accordingly stopped by cutting out thedirection switclrshort of coming to neutral position to out out the direction motor 51 and "the main switch will still be held in. However, 'anyother action of the controller, or action as to the lines which cuts out the main switch at once brings about a full stopping'of the main motor 64. and there may not be a restarting of this main motor 64; until after the accelerating'switch has come to starting position.

1,585,517 BEST V ABLE COP.

For upward direction of travel, the controller 21 is shifted to the right for direction switch contact 20 engaging with line 33, mummies with line 92, the latter extending to line 34. Further shifting of this controller 2l i'or eliecting upwa rd direction travelbringsthe contact .20 to line -19 and the contact 28't0 the line l8, reversing the throw operation of the motor 51.

The embodiment of the devices of this disclosure -2t'or electromagnetic or torque motor control for all of the switches is herein developed for-a main assembly control board embodiment in the remote control of the switches from the elevator car. Control board-93, Fig. 2, is shown as having contact arm carrying shaft 9% mounted in bracket 95. Mounted on this shaft 91 are contact arms 96 normally yieldably directed toward the contacts 45, 46, by springs '97. The shaft 41 has-arm's 98 staggered with arms 99 on shaft 213 to carry therebetween the 'llGXIDle disk coupling 42. Mounted on this shaft 43 isthe cam 44. The actuating regions for each direction of oscillation or rocking of the shaft "43 have uniform accelerating portiOIi lOOOfFthe cam 4-1, one for each direction',"each terminating in a less rapid accei crating portion 101. These portions 100 of the dam"4"a' j roX-iinate about 5 inward iiirctioii' from'tne'tangcntbit contact or" the roller 102 tobe' 'act uated by this cam Thisroller'102'is carried by arm 103 fast with the shaft 9&1 effective for simultaneous throwing of arms'96-on the shaft 9%. This arm 103 has extension 101 (Fig. 6) which in position of rest for thecani .1% is adjacent projectibn105 of the 'cam 14. The cam 11 is accordingly effective 'for holding the arms 96 outward so thatcontacts -15, 46,- are maintained open until the cam-Le is rocked.

In rocking theshaft 13, counterclockwise from tli e posit-i'on shown-in'Fig. 6, the roller 102*ridesupward approximately 55 upon the slow-up portion 101 'e'i'lectin-g a throwing in ofthe arms 96 'rapidly at first and then more slowly later on. As this throw is being effected bythe travel of the arm 103, the projectionlM'moves into recess 1106 of the cam/14? Should the operation of the torque motor 35 be inthe opposite direction, similar fthrow of the arms'96 is efi'ect-ed with the projection 10 1 riding int-o recess 10? of the 'cam 'Driven 'bythe motor shaft 41 or the torque motor 35 isarm 10S integralfivith coupling arm'99 carrying offset 109. The driven shaft {13 adjacent-the coupling =12. is mounted in bracket having bearing 111 (Fig. 5) for {theshaftQ and bearing 112 for the shaft 13. This bracket 110 also carries below the bearing 112 an abutment or stop 113. Loosely mounted upon the projecting portion of this shaft 13 towards the coupling 42 are weights 111, 115, designed as rights and 1,585,617 T AVAILABLE COP lefts. Each weight has a depending sound deadening felt pad 116 in a depending ear thereof. The weight 115 has a projection 117 for impacting with felt pad 118 in a recess in the opposing weight 11 1.

As the torque motor 35 is energized the arm 108, say in clockwise rotation from the motor moves to engage the pad 116 of the weight 114 infthe commencement. of rotation, throwing such weight 114. so that the felt seat 118 seats against the projection 117. The extent of rocking of the shaft 13 is limited by this weight 115 being held by the stop 113. This throw is adjusted to approximate in either direction. The load of the weight upon the shaft 43 is greater at starting and diminishes as the center of gravity is brought over theshaft 43. Accordingly, this resisting means of the weight 115 or 111 grows less, while the resistance of the springs 97 at the-arms 96 may remain approximately constant, but are not effective until there is contact and movement thereafter.

'At' once the motor 35 is deenergized the springs 97 tend to throw the arms 96 clear of the contacts 45, 16. This recovery is assisted by the' weights 11501; 114:, rocking the shaft section 11, now notinfluenced by electromagnetic energy, backto its starting position as detemiinedby-the weights 114, 115, bringing the arm 108, 109, into registry with and clear of the stop 113- which stop receiv'es the concussion-impaet.-

The direction switch motor shaftsection 53 is connected to cam shaft section 55 in a similar waya's to coupling and weights with armas the shaftseetion 41 is connected to the cam shaft section 43 at the main-switch motor 35. -The cams 56, 57, each have the uniform accelerating region-100 (Fig. 8) approximating about -5 away from the tangent for the rollers 102 and terminate in less active portions 101. As to these portions for action the cams 56, 57, are rights and lefts. However," the stop portions to be engaged by the arm 104: are somewhat differently disposed. The cam 56 has stop port-ion'119extending in the same semi-circular region as its active cam portion, while the cam 57 has its stop engaging portion 120 extending in the same semi-circular region as the active portion of this cam 57.

\Vhile in the operation of this device a one-direction throw cam similar to 56 or 57 might be used in connection with the main switch motor 35, such would thereby prove a phase reversal-stop device for the apparatus, precluding any throwing in of the switch motor 35 upon the reversal of phases. However, with the two-direction throw cam adapted to this main motor 35, there is an automatic provision caring for phase reversal in that should supply lines 8, 9, 10, as installed have the phases for operating .On the reversal of phase this motor 35 would operate counterclockwise and likewise on the same condition for starting still throwing the controller 21 would operatethe direction switch motor 51 counterclockwise, thereby throwing contacts 58, 59. This means that the indication atthe controller 21 in the car is good for the phase reversal because the reversal in the lines and one motor means a double reversal, thereby nentralizing the efi'ect for car travel direction indication of the controller 21. It is true that with this reversal, contacts 58, 59, now mean upward travel as against former meaning of downward travel. nis is a feature of automatic safety incorporated in this ap paratus due to the motor operation of the switches, the motors 30, 51, being polyphase and of the torque type. Furthermore, these motors 35, 51, at once there is a failure on any phase, lose their torque and the springs 97 are at once efimtive in conjunction with the weightslM, 115, in bringing the motors and likewise the switch contacts into open or initial positions. Accordingly these motors 35, '51, 73, because carrying energizing current when in thrown position, have this safety feature notwithstanding there is a-phase line. through each of the motors when but one phase is disturbed. In rendering possible this control of polyphase switch control devices remotely from the controller 21 in the car, the controller 21 in the car is connected to more than one phase of the supply lines.

The-automatic operation for self centering in 011 position is also true as to the accelerating motor 73 so pulled by the weight 84 dash-pot piston. The three switch controlling polyphase motors 35, 51, 73, may automatically return to off position. This return by these motors to off position may be on failure of one of the phases of the supply. Such return occurs from a non sealing position. As the accelerator motor cams 79, 80, 81, are bilateral, phase reversing motor 73 does not disturb the net result of the accelerating switch control. Each of these switch operating motors is dissociated from the power motor line as controlled by its switches. These motors are in addition to the power motor of the translation circuit. Furthermore, there is, due to this energizing action of the rotating field in the torque motor, constant pull action by the motor itself so long as the energizing current is therein.

There is symmetry as to the actuators 35, 51, 73. There is symmetry as to the arms 96. vAccordingly there is possible interchange of arms and auxiliary motors, one of each capable for replacement anywhere on the board.

The design of the cams has developed a proper timing for quiet and quick control operation by the remote controlherem disclosed. I

The extensionsJOl of the arms 1-03 not only coact 1 againstfth-rowing inof one switch arm before the cam is in position to hold such arm out but such extensions lO-i are effective on rotation of the cam back to off position for positively withdrawing the switch arm from contact or throwingin position. Accordingly in any quick reversal of operation of the torque motor, there is aninsured positive pulling out of the switch arm. The throw of the arms 96 as to the travel of such arms largely occurs as the rollers 102 ride along the canrregions 100. The slowing up ofthe travel of: the roller 102 by riding upon the cam portion 101 not only :quiets the tinal closing in action of the arm 96 at ltheiengagingposition of the contact in the-quick throwing. in switches, but this slowing: up of travel of the cam allows the motor-to -more ieadily compress the spring 97; as the period of motortravel or .dri-vixngw is beyond the throwing in of the switch :tlhereiszaccordingly a compressing-of the springewnfor holding the contact: =ofrlthe zswitch'iaga'inst vibration. This compression-of the spring operates as a safetywdevicei'inekiclcing:ozff for throwin the arm .awaydrom switch closingpos'itlon and :is of3 such effectiveness that even Without :the weights L114" 115; the arms may be released. i 3

\Vhat isclaimed and; ;it i is desired-: to secure by Letters Patentis: i n

1. A switch for v power :iappar-atus,' 'said switch being provided avith'immoviable arm, a cam for shifting thearm,='a springyield ably co'acting between the ca n andtlie arm, and, independent :of said power apparatus,- a switch motor for actuating'i the Learn, there being means, in addition to thesprin'g, for decreasing theload on the motor as the cam in its travel brings the arm toward fully thrown position to stall the motorwith current still energizing-said motor; i a

2. A s'witchprovided'with a movable arm and a camfor' shiftingthe arm-embodying a. uniform accelerating portion, a slowing up portion, and a-stop portion'as the cam in its travel brings the arni' toward fully thrown position. f 'i 3. A switch provided with a movable arm and a. rotary cam for shifting the arm embodying a first actuating portion of less than tangent from the starting point radial increase, a second slowing up portiomand a stop portion as the cam in its travel brings the arm to fully thrown position.

4. A pair of switches forthet/ranslation circuit of a power motor apparatus, said switches each having a movable arm, an actuating shaft, a switch motor in a control circuit complete in itself independently of said translation circuit, said motor being for actuating saidswitches from said shaft, and a cam for each switch mounted on said shaft, each cam provided with an arm shifting portion and an arm holding portion oppositely disposed, whereby the shaft in rotation in one direction throws one switch in and holds the other out and in rotation in the opposite directionholds the one switch out and throws the other in.

5. A sectional switch operating shaft embodying a. driving section having an actuating arm operable in either direction of rotation, a switch motor for actuating said driving section and a driven section having maintained transmission connection with said driving section and having one 'eightod arm to be engaged and then lifted in one direction of driving section rotation, and another weighted arm to be engaged and then lifted in the other direction of driving section rotation, a pair of switches 11 ving parallel arms, and means on the shaft driven section for throwing the arms 'of one switchin one direction of rotation and for throwing the arms vof the other switchin the -other direction of rotation.

I 6. -A; switch-operating sectional shaft embodying a driving section having an actuating arm effectivejin either direction of rotation; from a position of rest, a switch anotorlyforactuating said driving section, a driven shaft section aligned with the drivdug section; and having .maintained transmission-connection with-,said driving sectifonwand :havin'g a ypair of ,weighted arms loosely mounted-on; said driven-section, a

bracket :for -theidriven shaft section provid-' ingian:abutmentZ-adjacent: the position of rest oftsaid; actuating arm, said weighted airinsrnonmallyresting against the abutment clear 'ofsaid aactuating. arm, said driving shaft -as movable in one direction shiftable freely then to abut one of said arms to lift suchrarm in one directionof-driving shaft travel :and (to move and then'lift the other arm invthe other direction of driving shaft travel. V

7 A rock shaft having a driving section, a driven section alignedwith saiddriving section,1a flexible maintained transmission connection therebetween, a bracket for the driven section. providing a stop, an arm fixed with the driving section and registering with said stop, and spaced weights on the driven section normally hanging against the stop, said arm effective in one direction of rotation to move into'contact with and then lift 50136 of said weights against the other weight in such one direction of rotation to have such direction of shaft rotation Ill) stopped by the latter weight being held by the stop, and said arm eifective in the opposite direction of rotation to move into contact with and then lift the other of said weights to bring it against the one weight to have such latter direction of shaft rotation stopped, by the one weight held by the sto 8 A switch for power apparatus, said switch being provided with a movable arm having a first contact, a second contact to be engaged by the arm contact, a cam for shifting the arm, independent of said power apparatusa switch motor for actuating the cam, and a spring coacting for follow-up action after said contacts are in abutting relation, there being means in addition to the spring for decreasing the load on the motor as the cam in its travel brings the arm toward fully thrown position to stall the motor with current still energizing said motor.

9. Power actuation means for a switch including a rock shaft driving section, a maintained transmission driven section therefor, a momentum storing weight loosely rockably mounted on the shaft driven section, engaging means for angularly shifting the weight on shaft actuation, and sound deadening stop means for the weight.

10. A switch for power motor apparatus, a switch motor dissociated from the line controlled by the switch, said motor being.

for actuating the switch for a period of travel beyond the throwing in of the switch, and intermediate transmission change speed means between the switch motor and switch slowing up action at the switch in the final switch closing for quieting switch operation.

11. A switch for power motor apparatus, a switch motor independent of said apparatus for actuating the switch for a period of travel beyond the throwing in of the switch and to a stalled stop position for the switch motor with current still energiz ing said motor, and intermediate transmission change speed means between the switch motor and switch including a cam slowing up action at the switch in the final switch closing for quieting switch operation.

12. A switch for power motor apparatus, a switch motor independent of said apparatus for actuating the switch for a period of travel beyond the throwing in of the switch and to a stalled stop position for the ,517 BEST AVAILABLE COP:

switch motor with current still energizing said motor, intermediate;transmission change speed means between the motor and switch including a cam slowing up action at the switch in the final switch closing for quieting switch operation, and a spring opposing motor driving during slowing up action of the cam.

13. A switch for power motor apparatus, a switch motor independent of said apparatus for actuating the switch for a period of travel beyond the throwing in of the switch and to a stalled stop position for the switch motor with current still energizing said motor, a member directly connected and positively driven by the motor, and an arm for throwing the switch, said member being movable relatively to the arm and having means coacting to move the arm positively into and out of switch closing position.

14. A switch for power motor apparatus, a switch motor independently of said apparatus, a member positively driven by the motor, a two-part arm as to which the member is relatively movable, each part having a guide, a shaft providing a common axis for said two-part arms, an adjustable boltthrough said guide, and a compression spring on said bolt for abutting one arm and through the bolt effective for holding the other arm toward said member, said two-part arm being operable for throwing the switch as actuated by the member.

15. A switch for power motor apparatus, a switch motor dissociated from the line controlled by the switch, said motor being for actuating the switch for a period of travel beyond the throwing in of the switch, and intermediate transmission change speed means between the switch motor and switch slowing up action at the switch in the filial switch closing for quieting switch operation, said transmission means being provided with a movable lock out for the switch in opened position for the switch as determined by said means.

16. A switch having a movable arm, a motor having a shaft for shifting said arm to switch closing position, and means precluding operating said arm to switch closing position independently of operating said shaft.

In witness whereof I afiix my signature.

ERNEST B. THURSTON.

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