US1446631A - Elevator control mechanism - Google Patents

Description

W. 5. ATKINSON Y' ELEVATOR GQNTROLv MECHANISM Filed Apr. 29, 1921 5 sheets-sheet 1 Feb. 27, 19m

Ez Gf@ @@4221 fr INVENTOR. 75%,# Q. BY M 5f. @5w

* ATTORNEY 3i@ mi@ 37 Feb. 27, N231 \N. 5. ATKINSON` ELEVAI'IIOR CONTROL MECHANISM 5 sheets-sheet 2 Filed Apr. 29, 1921 INVENTOR. m ffm; .W

BY w @M ATTORNEY Feb. 27, w23, i Lmm W. S. ATKINSON ELEVATOR CONTROL MECHANISM Filed Apr, 29, 1921 5 sheets-sheet 5 INVENTOR.

BY M553@ y A TTORNEY.

l is pevided with eontiois, 'Whei'eiw l e .veig lor u higfjhe l cornes il in apparatus of the sind claimed. e vufious is eil embodiments of in die lovetionel view of' uontiol zip- 7 inten.4

S im p v of the s. sind addition e plain view of switch structuie oiled tiiei'ehy.

p' :E is un end eleva'ionzil view of the ich eiieiui'e of he e n diug'iemmutie View of one ol' of our diving and eonti'ollim` o unich my invention is applica- L ziginentaiy plan view, partly in weiifiui. oi tof ihe Stuciiii'e olf Figi. 5. i" ie e diagrammatic view olf' one oi ei'oiiil: :1 iiiinggeinents "irih `which my ble. Y

o p 1. ,i o inolisive, l is a 'hivh efe e-iiiied the poets oi oiovided with hearings; for

the shaft fl upon wiiioh is secured the sheave or Wheel 5., oveil which passes Jche safety 'faible G. Upmi Vthe shaft -l is'seouifed 'the bevel 7 'meshing with end dniving the hevel X'Izu 8 secured upon Jshe `governor shalt l0 haii g' a hearing 9 carried by one of the poste 2, 'Chiouoh which it extends vertically. it the uppei' end o'l the governor shaft l0 thoi'e :we pivoted at ll 'he iuins 12, l2 carrying at hei'i outei' ends the governor helle or Weighte 13, 13. Pivoted to the :wine l2 at M, l: are he links l5, l5, pivote/Ci at 76., 1G to the sleeve 1T movzihie longitudinally of the shaft l0. Clo-acting Wi'h "che sleeve 17 is the non-rotating Collin' 1S mov- :ihle longitudinally of the Shaft l0 Wih lie s Pivoied to Jrhe oolieir 'i8 at the level' Q0, which .is pivoted at 2i the in,v 22 pivoeii zii; 23 to u stationary memo-2., livoed 'to Ihe leve'il Q0 :le ivoed i6 to a level` ineinloei 27 secured, up in the shaft :ini/l havin the arcuate slot 29, thiouggjh which exenii. e pin 30 fo aol waiting the zii-m 31, loosel;7 pivoied upoil the ehe' 28 and havingr at its upper end the weight Pzuellel to Jdie shaft is disposed die shal' 33, upon which ie disposed the pinion oi) oothed Wheei Bei meshing' 'with the pinion o1' coothed Wheel 35, which latiei' nieves in fixed rela-tion wich the ain'i 3l and the eoeentiic cehie clamping nieinhei' 8G, heween which and the opposing eeceni'io cable cleinpiiwg' nieinheif 8'? ecime ed hy i'he pinion 35i may he gripped the safety oel-ele 6.

The link 3S, pivoed io the `levei Q() el; 39% ie pivoed at Ll() 'to the lever l Secured upon m sind having' vthe arcuate Slot 43,

es the post is :i link Q5 p the she-.ift through which extends e pin @A conneeted o the :iiin e5, loosel)v pivoted upon le shaft l2 and cari-ying et ite uppe" end Weighl e5. lziohed to the :ziin i5 is t ecoenii'io (fehle-engaging @lmnp 4J, oppose@ ivhiih is i siinilui f l i; i8 disposed upon the Sheff; i9

: nd niovuhie with the "oohed Wheel or gear 50i driven hv l'he toothed Wheel oi' d Yfih hv opposing' the outa'eii 1 VL 1 1 hulls i3 under she inhuence p terial, upon which are mounted two elec" Y for exainnle the inotor M Fie'. L7

Vboth the car and the counter ldi'uiii 6?' is secured upon shaft 73 gg i ifiie esi force when the shaft l() is rotating. lilou"- ever, additional Weighting means, 52, may be carried by the lever 20, on eltlici' side of the pivot 19, as inay be suitable or desirable. f

The Weight systeiii described constantly opposes the centrifugal torce actii'j upon the fly vballs 13, and thereby operates es a control as regards the upward nioif'ciiieiit olf the sleeve 17 and all the parts controlled or actuated thereby through the links 2 5 and 38. Y

Surrounding' the governor' sliail't l0 is a helical spring` 53, disposed between tli sleeve l? and a collar 54k, which is securer to the shaft l0 at any suitable posici-oi longitudinally thereoi". fis indicatei, the collar 54, with the governor s'ructui'e at rest, as shown in Fig. l, is disposed at simo distance above the upper end of the spr f 53, with the result that the soring 5 after predetermined range of upwird e nient of tlie sleeve l coiiies into nient with the collar 54., tl'iereavier cooperates with the Weight systein iii c( oi' the governor, as in opposing' tlie centrifuge, force er; rted upon tlie ily calls Referring to Figs. 2, 3 and el, bei shown mount-ed upon the base l tl 55, of slate or other suitable iiisulatiiioj inaswitch structures 'llie structure S coinprisesftlie movable c 56 pivoted at 57 and eiig=- jiiig the ary switch. Contact 58. uniilarly,

l comprises 'the stationswitch structure iu ary contact 59, with which co-acts the inox# able contact 60 pivoted at Secured upon the shalt is the cani Gi which corr trols the arni 03".' the switch S pivoted at A second cani 63, secured upon 'the shalt similarly controls tlie arm oi the switch b pivoted at 6l.

Referring` now to Fig'. 5, C represents '5 elevator car, to which is attached the main cable (Se driven by any suitable f ing over the slieave or di'urnL 65. L .L 7 .1. a. i, to the cable G4; is bhe couiiieriveigni sii-'u ture lill. rllie sainety cable 3 pas e; t sheavev 5, as a'l'oi'esaid, and also over t sheaves 6o, .the cable 6 i'unn sheave 66 is mounted, iii any iieijat tlie bottoni el the el Upon the bottoni oll tlic ce; the rotary drum 6.7, to 'whirl vat GS, one end ollv a crible 69 y c; the drum 6?' :uid over idlers 'T0 i the safety eab secured at 2 'to posee between the levers .f5x o im '.(f. 6., and tera iii ati' i i i disposed on opoosit of a rbar 78 paralleling the pat-li of travel of the car C and counterweiglit W. ii second nut 7e and coacting structure is provided along with a second Klf"i'all 73.

Siinilar structure is provie'ied upoii the countervveight structure TW ioi' co-acting with similar rails 73, 78 extending parallel to the path of traif'el or tlie coun weight. Referring to Fig. 7, T9 and SO indicate supply circuit conductors 'foi' upplyiiig current to an electric motor for driving' tlie iiiain cable (le and attached and (zo-acting parts. t will be understood that the inotoi' iiiay be oi' either direct or alternating current type. ln the example illustrated, the

Vinotor lil is or ene direct current type hav armature il and shuntV viield windings l?, 1 il relay, liavii'igg; 'the dingconnected across the supply conductors T9 a id 80 through the aforesaid switch ,55, is provided with the inoyable Contact ineniber Si?, which, when the 'Winding is energized when the switch S is close l, bridges the-'contacts S3, thereby bringt" into circi with one section lll of the s1 i t y eine ing a resistance practir ly equal to the rcsistsii .c oi" the shunt d :'-Jindingl When switch S opens, f ay is energized and the contact ine l n K i. .i o W 1 ano. bridges conracts oo, 8o, thereby ore ing` t ie n circuit through the resi 3e. an iii'iirggiifigg` the .tiel-l win-dino' F1 in place, ,'i'liercby t1 circuit lli is strengthened, cau

ne field o the motor sing` it to rend to run at lower speed.V

rlllie armature supply conductors tact member 8G vlieiiV relay Wliicl is is when tlie c whereby the Windingx S3 is e i the supply conductors 9, of", switchy S1 opens, *be

[Jl-JJ thereby completely hut the inotoi' lil, which tli liver power.

lt Will be understood that the controls illustrated in Fig'. T are fn addition to the i usual starting and sto'ugj ingr controls 'lor the be iiiiier nod i inet-or be e' l' n mi v-l in wiiicli else aA ilogous oniielli i i; sans qui Ami* I ne opera-ion is i s 'follow ums Ay u .L A against io- 'which the Weight system alone is actine motor occurs at a more deinitely determinable speed, since with the spring in actionV the governor at the higher speeds isino longer unstable, but is stable. And for still. higher speeds the governor continues to be stable, and may accordingly at substantially dolinite higher weed into action one or more oi' the safety cable grips or safety device releases. Such control at substantially definite speeds has been di'l'hcult, it not impossible, with governor structures previously employed, so far as l am aware. By employing only the Weight system control for the governor mechanism for the lower speed range, that range .is of suilicient extent readily to permit control of the field switch or other means for slowing the driving motor, any one of quite a number of different speeds. For higher speeds, when the spring or resilient system comes into operation, ad-

ditional controls are possible, and With a nic-ety of determination as to speed Which is not possible with governor mechanism controlled only by a weight system, which at the higher speeds tends to oscillate or is unstable. ln accordance -with my invention, the spring or resilient control stabilizesthe governor, especially in the highest Vspeed range. l

By adjustment of, the collar or abutment to diiilercnt positions upon the governor' shalt l0 is determined the speed at which the spring begins to co-actwith the weight system.

rllhough my invention is not limited thereto, it is preferred that at least the lirst control, as the-slowing of the driving motor, shall be eiiiected during 'the speed range in upon theV governor, and thereafter, 'lior the speed range Within which both the Weight system and spring' co-act in controlling the governor, the remaining controls are effected.

lihat l claim is: Y

l. 1Elevator control mechanism compristem controlling said governor throughout a low speed range, a control device controlled by said n^ fable member, a spring co.- acting with said Weight system incontroll ling` said governor in a higher speed range, and a second control device controlled by said movable member Within said higher speed range.

2. Elevator control mechanism comprising a governor having a member movable in response to changes ot speed, a Weight system controlling said governor throughout a losv speed range, a control device controlled by said movable member, a spring co-acting with said Weight system in controlling said governor in a higherspeed range, and a plurality or control devices a governor having a member movable inV nimeer controlled by said movable member and brought into operation in` succession in said higher speed range.

3. VElevator control mechanism Vcomprising a governor having a member movable in response to changes otl speed, a Weight system controlling said governor, ay resilient system controlling saidgovernor for speeds in excess ot' a predetermined speed, ,caroperating motor, and motor control switches controlled in succession by said movable member'upon attainment of different speeds, one of saidsivitches beingl actuated alter said resilient system has been rendered etifective. Y Y Y 4. Elevator control mechanism comprising a governor having a member movable in response to changes oin4 speed, a Weight system controlling` said governor, a resilient system controllingl said governor :tor speeds in excess of ay predetermined speed, av caroperating motor, motor control switches controlled in succession by said movable member upon attainment of different speeds, and a safety device controlled by said movable member upon attainment of asaid eX- cess speed.

5. Elevator control mechanism comprising a governor having a member movable in Vresponse to changes otspeed, a Wei-eht system controlling said governor, a resilient system controlling said governor iior 'speeds in excess ol? a predetermined speed, a caroperating motor, motor control switches ccntrolled'in .succession by said movable memresponse to changes otspeed, a Weight sy,-

tem controlling, saidhgovernor th oiiyzh loiv speed range,V a spring co-acting'vvith said Weight system in controlling said governor in a higher speed range,a car-operating motor, a motor control switch controlled bylsaid movable member in said lower speed range, and a second motor control switch controlled by said movable member inthe higher speed range. y Y f Y 7. Elevator Control mechanism comprising a governor having a member movable in response to changes of speed, a. eight system controlling said. governor through a low speed range, a spring (io-acting with said Weight system controlling id governor in a higher speed range, a car-operatmotor, a motor control switch controlled by said movable member in said lower speed range, a second motor control switch controlled by said movable member in the higher speedrange, and a safety device brought into action by said movable member after control ot said second motor control switch.

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S. Elevator mechanism comprising a governor mornin` a member movable in response 'to charmes speed, a weight system controlling' said overnor through a low speed range, a spi-ingr co-actingl with said weight t system in controlling said governor in a higher speed range, a car-operating motor` a motor control switch controlled by said movable mei-:uber in said lower speed ranfrm a second motor control switch controlled by said movable member in the higher speed range and saitety devices for the car and its counterweight brought into action y said movable men ber after control ot said second motor control switch.

9. Elevator control mechanism comprising a satety cable moving with the elevator car. centrifugal governor driven by said cable, a weight system controlling said governor in a lov: speed range7 a spring coming into action in a higher speed range to control said governor, and control devices brought into action successively by said governor tor speeds lying' within said low and higher speed ranges.

l0. The combination with an elevator car and a counterweight therefor, or guide rails ttor the car and the counterweight clamps carried by the car and the counterweic'ht. respectively. and adapted to `grip the rails, a safety cable normally movable synchronously with the car, connections between said cable and the clamps, and means whereby upon a too rapid movement et the car in one direction the movement ot said cable is retarded to etvect actuation ot the clamps which are attached to the counterweieht and whereby upon too rapid movement ot the car in the opposite direction the clamps carried by the car are actuated.

l1. The combination with an elevator and an electric motor for driving the same, ot control mechanism comprisingl a governor having a member movable in response to chauffes ot speed and actuated upon movement ot the elevator. a weight system controllingT said governor, a resilientI system controlling` the said movable member through but a portion ot its path ot movement, and a control device for the motor actuated by the said movable member after said resilient system has been rendered etfective.

l2. The combination with an elevator and au electric motor for drivingr the same, ot control meelenisni comprisinpj a grrrvcruor having a member movable in response to changes oit speed and actuated upon movenent of the elevator, a. weight system controlling; said governon a resilient system. controlling the said movable member through but a portion oit its path et movementn and a circuit interruptiosr device tor the motor actuated by the said movable member after said resilient system has been rendered effective.

i3, Elevator control mechanism comprising ay centrifugal governor, a member :novable by said governor in response to changes oi" speed, an operatingmotor, a motor control swtch actuated by said movable member at a predetermined point in its path ot movement, and a resilient system tor controlling; said governor only at speeds in eX- cess et a predetermined rate7 whereby the rate of speed of the governor at which the said switch will be actuated may be definitely fixed.

la. Elevator control mechanism comprisingr a centrifugal governor, a member movable by said governor in response to changes et speed.r an operatingr motor, two motor control switches respectively actuated by said movable member at predetermined points in its path oit movement, to tirst reduce the speed or the motor and to then interrupt the circuit therethrou eha and resilient Yter controlling' said governor only at speeds in excess ot a predetermined rate.; whereby the rate of speed at which one ot said switches will be operated lmay be definitely fixed.

l5. Elevator control mechanism comprisingr a centrifugal governor, member mevable by said governor in response to changes or speed, an operating; motor., a motor control switch actuated by said movable member at predetermined peint in its path ot movement, a resilient system tor controlling said governor at only speeds in excess et a predetermined rate, and means for adjust-inte; the position ot said system relatively to the said movable member.

16. The combination with an elevator and an electric motor tor driving; the same.y ot control mechanism comprisiimr a governor having a member movable in response to changes of speed and actuated upon movement ot the elevaton a control device act ated b v said movable member during comparatively low speed range, tor reducin the speed ot the motor, a control device tor interruptiim` the circuit through the motor and actuated by the sai r'iovr-.ble member during movement thereov a' hipjh s d range.v and a resilient system tor controllingr` the said movable member only during; its movement in said high speed range.

ln testimony wl'lereot l have hereunto hired my signature this 26 day ot @pril llO

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