US1768722A - Door-closure mechanism - Google Patents

Description

july 1, 1930. c. c-1oMK|soN E'r nu.` 1,768,722

DOOR CLOSURE MEICHANISH Filed .my 2. 192'/ 4 sheets-sheet 1 July 1, 1930. c. c. -roMKlNsoNErAL 1,768,722

DOOR CLOSURE MECHANI Sl July 1, 1930. c. C. vTowlKlwsolQ Er AL 1,768,122

DOOR CLOSURE MECHANI SM Fued July 2. 1927 4 sheets-sheet s .INVENTORS CC /mimfon July l, 1930. c. c. ToMKlNsoN E1' Ax. 1,768,722 l DORv CLOSURE MECHANISH Ptentecl Julyv 1930 ,i

` CHARLES moivLKI-ivsoirf.on1 IPili-leem:r1-Ema, ANnHoRAmoi-PWAN.CLVEQEGRANEQRDQ l f1 'NEW JERSEY, As'sIGNoRsV-f JiANY, ioFf mwnonngi. VY., Agr-conroeAqsIon ois NEW JERSEY' mism/and,paiticiilarljf to olosiies for elevalevels" by utilizingffan *elevtor4 having; two

fiiooifs oi d'eel s.*f -lhen such an elevatorjis weit-is desirable;@meansbeprovided `for opening and olosingfthedoorsvat ,the two levels served ibyntheelevlator siniultaneosly.

Furthermore, itiisl gdesiifahle'fthatfthe" door 'Control mechanismlbe Vso mmanged that the doors cannot bezopened u nlessthe elevator is v @ne ofY the objects oftheuinvention isto provide Simple andi pratiffil 1001" Qperlng ineehafnismjzpndmeensfor locking thedooin Closed positiong f e 7 f Anotheriebiect ]0f,.th invention 11S-@Oprov'ie @for @Peeing @11d Closihgmediansm SO onstnucted. rend `arranged that aiv .pln'raillty of i vided-.oor openingzind'elosing mechanism for Shtchne ofthe' Counterwight Cble ranged that the Acontrol deiiees iat allot the floors controlled or kserved -by the dQOITSlmust.

be. actuated below anyof. #11G/@vors 921111 be opened.`

Anather Obi@Ct i Vide door closure mechanism vyithloeking `:aleggia aii'engedf lfor o peratiomes Itlflejdoory in moving,thekdooifto olosedposition. Anotlfierfobgeet of theglnventlon :1s to pijovide .dooi closure inehanisin with'nnproved L and efficient ieoniiterbajlaneing mechanism` so aiinnged yas Ito eoinpensateffoi",Variation or Another object -zofw'theinifention Vis' to Yprovide loking mechanismfoij the vdoors Sowin- 1 tec'onneeted -Withtl door operating notor offthefinyention uis to pro! BYfm/.r-ESNE ASSIGNMENTS; imo .'J.- .EDWARDLOQDEN A noM'- vide ailrotatingcounterweightl opposed tojthe liftedbythe.motorftoyassist'the motor in .itsoperation.`

hei` vlojects ofthe invention will 'ap'-L y j lig is a fdiagijzmmatieviewillustrating i theeleotric'fcireuits 4for controlling the Yopezitioliiofthe'idoonlocks dooi1 oper-@itingi ff Figs enlngedelevational view p'sut-y ly hroken 'alwey showingV 4the oounterwyeight and a eombineddoorinqoving-deviceiand lo'ek l 'Controflledfby-the counterWeight;Vv f

jaeent parte; l y i 'fF-igis a detail sectional eleyationehowingthel dooi'look;

Fig-8 is aldetil sectional elet/@tion showing a modified Construction of'spiin'g-support for the .eeeiaeriyeigbtss Y ,Fig 9 1s anelevationfil yiew showing a slightly different/form -ofsdoor moving' '95nd is `athoiiz"ntal Vsection through the dooiiillustiatinga hinperse'oured to one faee itheidl.; ihd' v l f3 Fig/Allis alseotional elevation illustrating the location of the ushezwes for the counter- Y o eningsonglierent :floor levels and opertng l mechanism I vand control f -'devices forv the f @los rres soonstruotedandriangedthat a #Thelini'gention brieydeseribed-consists of Y ianplinzglity of door olosxuresfor `closingdoo`r p'liialitj ofrthee'losures' can be opened and. closed simultaneously. A veounterweigrght v1s povidedforjeafeh 7'door so constructed that 'ivhenthe oounterweight islowelfed andithe U9 `.and pthe oirouits thereo'fthat `Atheloeliing nieehanism-vwillfhe automatioally released'as themotoifstarts.. Y

Another object ofthe invention isto prodoor is unlocked, the door will be opened by the counterweight. The counterweights are controlled by-a single cable. having thereon a plurality of vertically spaced members adapt-- ed toen'ga ethe counterweights and cause the counterweights to be elevated when thecable is raised orlpermit the counterweights to be lowered when the cable is lowered. The doors 4are so arranged that when the'counterweight.Y

israised by the( cable, the weight of the door will cause the door to close.

The counter-weight control cable is raised and lowered by means 'of a crank 'so constructed and arranged-.that the rotation of the crank through 180 will cause the door t to ber raised or lowered as the case may be.

A The motor forr operating` the crank is so controlled that when a two floor or double .deck elevator Ais used, Vmanually controlled switches orboth floors must be closed before ,the motor circuit is closed and the motor will operate. i Furthermore, the closing of the two manually controlled switches also effects the release of the Vdoor locks lfor Vthe two doors Means isprovided for movin the doors to thcirinal closed position by lieV movement of the doors themselves as theyiapproach the closedposition or in conjunction with the .counterweights so that the door locks will :operate to Secure thedoor in closed position.

AThis means is automatically released by the upward movement of the counterweight and is automatically placed4 in operation by the downward movement of the count'erweight.v

. A rotating counterweight is provided upon theA same shaft 4or integral with the crank l which by gravity assists in raising thecounterweight control cable and thus assists the motor initsoperation. Y d Y AVarious novel features are incorporated 1n the door closure construction, operating mechanism for the door closures and circuit control devices for the motor anddoor locks and these will be brought out in more det-ail in the Vfollowing description.

Doma closure construction' In Figs. 1 and 2 there are shown a plurality `of iloor levels A, B, C and D. EachV of the floor levels has a hatchway doorjopening adapted to be closed by a door which in the form Y of the invention shown comprises a pair of sections 21 and 22 hingedly connected The lower section 21' preferably has `a bumper beam 24 secured thereto Vin position to be disposed opposite the rear .bumper on thecar to prevent the car bumper from engaging the door and to insure the positioning of the car in such a location that the door will notdengage the car when it is raised and lowere l The door sections are provided at their lateral edges with rollers 25, 26 and 27 posiraised.

tioned in channel tracks or guide rails 29 and 30. A The guide rails are provided with vertical positions vand intermediate portions 36 curved at 37 to lead the doors from the vertical portions 35 to horizontal portions 38.

",Ivn Fi s. 1 and 2 the doors at the floor levels B andV are open and the door at floor level A is closed'.

`Each doorfis adapted to be opened bya .counterweight' 40 Yhaving apair of brackets .41 andi-12y on .which4 arerotatably, mounted sheaves 43 and 44. A counterweight cable`45 has one end secured as shown lat 46 to a fixed support and the cable is passed under the sheave 44 upwardly over a sheave 50 and downwardly to a bracket or luo 51 secured to the lower endof one of the si e edges of the lower door section 21. A fusible ink 52 is preferably interposed between` the lower end of the cable and the lug or bracket 51.

Another counterweight cable 53 is also se- .cured to a fixed support and passes under the .sheavey counterweight upwardly over a sheave 55 across above the door and around a sheave/,56 and ldownwardly to a bracket yor lug57v projecting laterally from theopposite edge of the door section 21. A fusible link 58 is `interposed between the bracket or lug 5'( and the lower end of the cable 53.

The counterweight 40 is of suiicient weight to raise the door sections to open position when the weight is free to fall and by reason of the counterweight cable connections above described, it willbe clear that the counterweight will move only onelhalf'the distance of movement of the door sections.

It will be clear from the showing in Fig. 2 that the door setcion 21 in its wide open posivtion is in inclined position. Since there is comparatively little friction and comparatively little force required to move the section 22 alongthehorizontal portions of the guide rails when the ounterweight 40 is lifted, the door. sections will move of their own weight to closed position.

Operating mechanism for door closures The operating mechanism for the door closures is particularly designed for use with a vention illustrated is secured at its upper end to a crank 61 and passes over a sheave 62 and downwardly through openings 63 in the floors andlthrong-h centralmpeningsl in the coun- H terweights and betvveen the sheaves 43 and f Aio $14.'k 2 TheV cable 60 has secured 'theretol ver- Y ytically spaced clamps 684 and a springf69is in-vr terposedbetween eaohclampand asupport or plate adapted to engage and support the connterweight. l The elamps,springs and Vsupporting plates are f so relatively arranged that when the1crank-- 61 is ymoved in a clock- Wi'se direction Fig.` f1 throughV Y 1870o the countervveightsiof the open doors will be lifted a.sP-cient; extent topermit the doors to close.v l/Yhen thefcrankis then rotatedfaigain jin, a Aclockwise :direction through,180,the cable 60 willwbelowered, permitting the counterweights of-the `unlocked dOQrSlto fall, thuSJOPeH-He' the doors. x Y a Y Each of the springs is preferably so proportioned that it Will support, forexampla twice the Weight required to reversethe bal- .ance and eloseZ-the door controlled thereby.

if itis'assumed that'y the spring is half compressed by the conntervveight when the connjterweight is supported thereby, between this halfcompresson-and the full compression, thespring has'arrange of movementfdnring which thedoorwillfbe operated to close when the clamp and cable is raisedi lfthe clamps `and springson all the floors :are adjusted Within this range,-.all of thedoors` Will -be properly operated.v .11n oase they coiinter- Weight. cables orl cable stretch, they doors will still be operative ask long; as fthe` yamount of stretch is Withinthe rangeof the springs.

. The springs, 69 alsoprovide eushionsfor the eounterweights andl relieve 1 the :lifting cable and lifting'inechanlsm Jrrom shocln Fig. 8 illustrates onemanner of `mounting the' springs betweenfthe folamp--68 andthe y. Vbearing plate or supportA 70. n this'iigure there' is shown aqpai'r or' platesf 1 nand 72 Springs 74 are: interposed between .the plates Y 71 andv @27 ,being disposedin'soclets formed ionthe inwardly Vfacing surfaces ofthe. plates. itvvill be evident that the springsgYfL-canbe Y readily'reinoved and replaced, if desired;

yllhe crank 61 is mounted` on shaft- 75supported iii-brackets 7 6. `The shaft has secured thereto a eounterweight 611 which has :its center of gravity'in a line atright]anglesy to the longitudinal axis. of the crank."4 rlhis geomite'iwveight may bef made integral iviththe cranlejandthnsfavoid *strains on the shaft` l ifastenings and tortional strains Within the shaft 75.

,iShaftT 5 also has 4securedthereto a ivorm gearYS driven by a Worrn9 carried by a shaft havingsecuredtt'o its other end a xvorm l gear.. 81 f 4vvfhic'hV in turn lis 'driven by a Iworm A62 carriedtby a shaft`33dr1ven by a jmotor'zScQ. During leach opening or closing movement of oneor more doors,-thefcrank`61 ismoved'through 180. .f For instance, as a i above 'stated when the crank is movedlthrough 180o from the position shovvngi'n I1`ig.f-1,;the counterrvveightsfor the open doors'wvilljbe raised", .thus permitting `.the doors'toy close. W'hen the cranlris moved through the other half revolution, -the cable l 60 Willbeloiv'eredk andthe' counterweights of the unlocked doors Willbe lowered and the doors opened. 2 Y

The crank eonnte'rwfeight, by its Weight assistsvthe motor in raising the cable-v60 and its load, thusfmaking the load more uniform land permitting use oi' avlsmaller motor. itis obvious that the crank could beset to.

operate on 'vertical centers, in ,Whichease the Y rotating countertveight would kbe pla'eedldi- ,this object is' shown in Adetail in Fig. 5in

which there vis illnstrated a 'forli-shaped lever pivoted at'90 on a iixedpivot inonntedonlone kof the guide rails.A This lever has" a pair of arms 91 and 92 projecting` from one side of the pivot and av eurvedarm 93, prejecting y 'from the'opposite vside of the pivot.v Each noi? the counteriveights hasrpivotedto lugs 95 depending from the lovver end thereof an arm 96 adjustable between loch nuts 9'? on a threaded stud 98. Thefree end of the arm hasalaterally projecting end 99 adapted to` engageons or the other ofthe forl arms 91 or 92 a'sihereinaitersetfforth. @ne of 'the lloe doorV sections liasjjprojeeting'laterally from one .'.acethereoi a stud 100`V adapted to be engaged by the curved arm 93 of the lever.

An relatively heavy-spring V101 has one end 102 secured to the guide railV andthe other 'en'dsecured at`103 to the arm 93., In Figs; 4 ,and'the spring 101 isl exerting a force tending'to rotate the leverfin a clockwise direcf tion and since the lever engages the stud 100,

this forcetends to depress the door and-assist in movingthe door to completely closed position.r kvWhen the door is to beopened and 4the control mechanismy is op'eratedto start.- v.the motor and lower the ycable 60,*,pe'rmittingv theconntervveight to move downwardly, the

end 990i the arm 96 by'reason of its engagement With the arm 92 ofthe lever Wil-l swing the lever in'an anti-cloclwvisedirection untilr 'thelever reaches the position shown indot- Vted lines in Fig. 5. It should be noted that inthisposition of thelever, `through thepoints 102 and 103 is disposedto passing the lei'tof 'the pivot 90 and thespring 101,

ted line position in Which it engages an ad* *justable stop 104. Inthis position of the,

lever, the arm 91 is disposed in. the path of therefore, tends'to'rholdthe lever in the dot- `nfimfementofthe end 99 of the arm 96 so that Whenitheicountervveight is again raised tov permit VAthe door-to close, the lever Willvbe swung in a clockwise direction about Vits pivot 90 and after the lever has been swung to a suicientextent for the spring 101 to'be dis'- posed vin a line "to the right Vof the pivot 90, the spring will exert a downward pull against the stud- 100,v thus assisting in closing the door.

Fig. 9 illustrates a slightly different form of lever. In vtliisiigure the lever is pivoted at 90 and "has a fork-shaped portion 105 and an arm 106 disposed on the oppositeside of the pivotfrom the fork-'shaped portion and at an angle thereto. The spring 101 is connected to an arm 106 of the lever at 107. stud 100 on the door is positioned between the fork tines or legs 108 and 109 of the portion 105 of the lever when the door is closed.

`AOnjopening the door, the stud 100 will engage the fork leg 108 and swing the lever in an anti-clockwise direction to a position in which the spring 101 will act on the opposite sideofpivot 90 and hold the leveragainst stop 104. jWhen the door closes stud 100' will engage leg 109 and when the lever has moved ina clockwise direction a slight extent spring 101 will pull the lever down and assist in moving the door to closed position.

Circuit control devices for motor'am door i .Zoo/c3 In Fig.y 3 circuits are illustrated for controlling the' operationof the motor and the door locks which lock the doors in closed position.` The elevatorE is shown as disposed opposite the` floor levels Band C. The positive control main is shown at X and the return or negative side of the control main is shown at Y. f

' In order lto start the motor in operation and open the doors at'the two floor levels B and C, a separate manually controlled switch,

such as a; push button self-holding switch is provided for each floor level and itis necessary that both of these switches be closed rbefore the motor can be started inoperation. Such switches are shown at floor levels B and C and are indicated as switches 110 and 111, but these switches may be remotely located on a dispatchers switch board, if preferred. Each switch is surrounded by a solenoid or -magnet winding l112, the winding of the switch 110 being connected at 113 to the positive control main The opposite end of the solenoid winding of switch 110 is connected toa switch contact 114 which is adapted to engage a contact 115 when the switch is closed.'r Contact 115 is connected by a wire '116 to a contact 117 adapted to slidably en- 'r'age and close Contact with a contact cam 118 carried by the elevator car. The cam 118 is connected by a wire 120 to a cam 121 also carried by the elevator car but disposed at the floor level C. Manually operable switches 123 and l124 are interposed in the wire 120 by The means of which the circuitthrough this wire can be broken. The magnet or 'solenoid winding 125for the switch 111 is connected at one endv to an intermediate positive control 119V and atV its opposite end to a'contact 126 to engage contact 127 connected by a wire 128 to a contact .129 which in turn' is adapted to slidably engage the contact cam 121. j

An electrically controlled spring actuated tor car are connected by wires 140 and 141 to a` wire 142 connected by wires 143 and 144 to contacts 145 and 146. The contact 145 is adapted for engagement with the contact 150 which is connected by a wire 151 to amagnet or solenoid winding 152, the other endof the winding being connected bya wire 153 to an arcuate contact 154. The magnet winding 152 is adapted to actuate a switch member 156 which forms the core of the magnet and has at one end thereof a contact 157 adapted to engage the contact 146 and at its opposite end a contact 158 adapted to engage a contact 159. Contact 159 is connected by a wire 160 to a contact 161 which in turn is connected by a wire 162-to one side of the motor 84.`

The contact 157 is connected by a Wire 170 to a magnet or solenoid winding 171 of a switch 172 having the Contact 150 at one end thereof and a contact 173 at the opposite end thereof adapted to engage the contact 161. The other end of the magnet or solenoid winding 171 is connected by a wire 175 to an arcuate contact 176, the arcuate contacts 154 and' 176 being concentric but having different radii.

. A yswitch blade 180 is mounted on the shaft and is adapted to engage one or the other of the arcuate contacts 154 or 176. f The blade 180 is connected by a wire 181 to the negative side of the power main.

Contacts'158 and 173 of the switches 156 and 172 are connected by a wire 183.which in turn is connected to the negative side of the power main. A

In order to permit the operators on the two floors being served by the elevator f to signal each other when they are ready to depress the control buttons 110 "and 111 and open the doors, signal bells are provided at each floor landing. In Fig. 3 there is shown a batteryZ connected by a wire 190 to switch terminals 191 and 192 disposed at different floor levels.

:The eievairfis pmvideawah demas 194, 195, 196 an'd1-97'ada'pt'ed to engage Aand coaet with 'contacts '198, 199, 200 and'12`01v dis-v posed in ,thel hatcl'iway-when theelevator is disposed opposite Lthef floor le'v'els y"served thereby. n r if Contacts 198 and 200 are-conneeted -by bya wire 216. f i Y, y

'l/hen the switch 191 is closed, the circuit is completed fro'mithe batte'rythrough Wire l190, switch 191,-conta'cts-199, 195,-wi`re 216, conback tothe battery, `4 Thus, when the switch onfloo'rl'evelB, for instance, is closed, the

bell on floor-level @will ring.

Similarly, when switch 192 is closed, the circuit will becompleted from the'battery throughwire 190, switch`192,`contacts 201,

197, wire 215, Contacts 194, '198, bellaoa'wire 210 and wire 212 back kto the battery.

It lwill be seen, therefore, that in'orde'r for vthe signal kbellsto operate, it is necessary y thata'fcarbe positioned opposite the ioor levels on which the bells arelocated andwhen .this condition' is met, the 'closing of theswitch or pushV button on'y one oftheoors served by the elevator will-,signal the operator at the j other door, 'thus indicating that the operators are ready to close ythe self-holding switches' 110` and 111,'andv set in operation ,I

" and door operating mechanism and ythat `the "closing of the switches by the operators at the twojrtloor levels served iby the 'elevator will'lresult'in the loperation ofthe motor to the idoor operating mechanism. Opeml'z'on of-door control circuits After' the operators ofthe two floors have signalled -thattlrey-are readyto 'closel the switches 110 and 111, these switches will be closed and will be heldin closed position by f `the magnet coils 1&12 and 1 25 as longas the Vmotorcircuit' is closed After themot'or l*has rotated the arm G1 and the switch blade 180V through 180?, the circuit will be automatically opened-andthe switches 110 'and 111 will be released*tromtheY action of the niagnet coils. I `1 Whentheswitches are closed,a circuit will be completed from the' vpositive A*main X' through wire 112, contacts 114 and 115, wire 116, contacts117 and 118 wire 120 contacts 121 and 129, wire 128, contacts 127 and 126, wire' 125 to the wire 119. -The circuit will also pass from wire 119 through the 'magnet f coils 133 oi the door locks, releasing the door locking means andyfrom rthese coils through contacts 185 and 136, wires 140 and 141, wires 142andi144, contacts 146 and '157,`wire 170, magnet -or'solenoid winding 171, wire' 175, arcuate Contact [176, switch blade 180 and wire 181 to the negative side Y-ofv the power main. The, energizing-.ofthecol' 171 will inigfo'ff'the"contactsl178 Vand1`61 will connect "been opened if it -is desired to close theldo'ors;

i close the contacts 173; andy :161, thus complet#- `ing""thelmotor 'circuit of motor 84 since the ofther-side ofth'emotor is connectedtothe positive side' ofthe' power main and-the closand the blade is in engagement withthe'- arn cuate contact AV1154, the closing ofthe switches tacts 196, 200, bell 208, wire 211%and ywire 212 110 and `111 'willcause the circuit to pass from the wire1'42 through wire 143, contacts 145 'and 150, wire 151, ,magnet coil 152,5 arc'u-f/ @recencies-154 and blade 180i@ the negative side Yo'f the powermain. The energizing "of the-magnet ycoi-1 152 will cause the'conta'cts "contacts 158k and 159gopens the contactsf146 VVVand 157'and `the closing ofthe contacts 173 -and 161 opens the 'contacts 145 and `150.

Thus, only one Aofthe circuits can bein operf ation at! aL time.

` Fromthefforegoing'description iit' be seenthat simple and practical control circuits have been :provided forA controlling` the motor open or close the doors disposed at the floor vention is notlimit'ed to' the particular-cir cuits illustrated and-those shown have been Y 'illustratedmerelyforthe purpose of showingv one Iway infwhich theoperation can be carriedout. l, u

l-twill be evident from the Vforegoing description thatlthefmotor is operated in one ldirection 'only and that the operation oil-the"V -motoritofmove the crank through 189"v in one trol cable ftobe lowered,thus lowering the Acounte'rwe'ights off the unlocked doors and causing" the doors to open.

Incase of rethe fusible links 52 and 58 melt and release theopen doors `from theac- `ftionof the counterweights 'and' permit them to-close;` v Y f I Although certain specific embodiments of the invention-have been particularly shown arid described, it will be understood that fthe,

levels; t It should beunderstood that theint Al5 Y in the followin invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts `crank through the rest of the revolution Will lower the counterweight.

2.` Door closure mechanism comprising a door, a counterweight connected to open said Y i door, a motor, a crank rotatable by said motor and connections so constructed and arranged that the `'rotation otsaid crank through a portion of a` revolutionl will raise said counterweight and fpermit the door to close andthe rotation o the crank through the rest `of the revolution will lower the counterweight and cause the door to be opened thereby.

`3. In combination, a plurality of door openings, a door for each opening, a counterweight connected to each door and adapted to open said door, a member having means adaptedto engage and support saidcounterweights, said counterweights beingmovabley v relative to said means, and means connected to said member for lifting said member and said counterweights, thus permitting the doors to close. Y y

4. In combination, a plurality ofy door openings, a door for each opening, a counterweight connected to each door and adapted to open said door, a cable having resilient means connected to said cable for lifting said counterweights, thus permitting the doors to close i. combination, a plurality of door openings, a door for each opening, a counterweight connected to each door and adapted to open said door, a cable, resilient supports on said cable adapted to engage and support said counterweights, and means connected to said cable and adapted to raise and lower said cable and supports. l

6. In combination, a plurality of vertically spaced door openings, a door for each openin movable to open and closed positions relatlve thereto, a `lock for holding each door closed, a counterweight operatively connected to move each door to open position, a cable, means `for raising and lowering said cable and vertically spaced supports on said vcable engageable Vwith said counterweights to lift Vsaid counterweights as the cable vis raised. i l

7. `In combination, a plurality of vertically spaced door openings, a door for each openincapaz ative thereto, a lock for holding each door closed, a counterweight operativelyy connected to move each door to open position, a cable, means for raising and lowering said cable and vertically spaced, resilient supports on said cableengageable with said counterweights to lift said counterweights as the cable is raised. f 8. In combination, a plurality of vertically spaced door openings, a door for each opening movable to open and closed positions relative thereto, a lock for holding each door closed,-a counterweight operatively connected to move each door to open position, means for raising and lowering said counterweights, and means controlled by each'counterweight `for moving the door Vconnected thereto to closed position.

, 9. Invcombination, a door movable to open and, closed positions, door operating mechanism for said door including a counterweight for opening the door, and means controlled by the counterweight and engageable with the dooras the door approaches closed position for moving the door into closed position. A

l0. In combination, a door movable to open and closed positions, door operating -mechanism for said door including a counter- WeightV for opening the door, and pivoted 9 means engageable with the door only as the door approaches closed position for moving the door into closed position.

,11. In combination, a door movable to open and closed positions, door operating mechanism for said door including a counterweight for opening the door, and means pivoted on a fixed support and controlled by the counterweight and engageable with the door Vas the door approaches closed position for moving the door into closed position.

l2. In combination, a door movable to open and closed positions, door operating mechanism for said door including a counter- Weight for: opening the door, and s ring actuated means engageable with the oor only as the door approaches closed position for moving the door into closed position.

13. In combination, a plurality of hatch- Way doors disposed at different fioor levels and movable to open and closed positions, a counterweight connected to each door and adapted to move the door to open position, a crank, a cable connected to said crank, means to rotate said crank, and spaced members carried bysaid cable and adapted to support said counterweights and permit the doors toV close.

14. In combination, a lurality of hatchway doors disposed at dl'erent floor levels and movable to open and closed positions, a counterweight connected to each door and adapted to move the door to open position, a

crank, a cable connected to said crank, means to rotate said crank, and spaced members carcircuits so constructed and arranged thatthe j motor circuitWillnotibeclosed unless ftheriad by? said-1 cable-zand'- adapted to= support said counterweizhts'fand permit-the doors to close,A v said cable, Y crankY and; cunteriveifght supports being so relatively; constructed and arrangedy that thev cuntervveightsf Will be raised' permittingthe1 doors to close, in Vone positiony of theV crank and Will'- be' lowered, thus-'opening tledoorsin fanotflfier.position ci:V the crank. 7 l, ff K i l5. .in -coinbinaticm a l .plurality of: hatch^ ivay doors disposed at? different Hooi' levels;r

an elcvatorhavingga'pluralityf-of decksfv door` operating means including moton'control me chanisrn including manually f op eratable switches"V for the different floor lev'els,fand:

switches .for Athelevelsjserved by-f tlfie'glelfeva-u tor-decks are -closed. 1 *Y p l. c

i6.Y in combination,- yay plurality i of hatchdo'ors disposed ati different floor: levels,' an elevator having fa plumllityoi decks', electrically controlled'locksfor-lockingfthe doors,

door operating meansincludi-ngamotor@ con-` trol mechanism. for" said-f operatiings:V means, said control mechanism including manually operatablel switchesy for the different ,o'o'rf levels-, and circuits so constructed'- a-nd TAVai ranged that the doors'oppositeI Ethe elevato-r;

decks will be unlockedandtheinotor circuity will be closed-When? th e'l svvitclh'esfor said lvelsfare closed@ l L I i 17.' In combination,"afhatchwajy door Inovableto open and closed-positions,an electri-- cally controlled lock. kforftheV door,V doorfoper# ating 'mechanism includi-nga motor 3andcircuits inclndiiigthe-locl; and motor andfs'ofconstructe d and yarrangedt iat the closi-ngfoifftlie' circuitYV will release ft-he (lock andJ operate fthe mctofrandla'lmanually operableA svvitclif'cone trolled when' closedby the-.motor circuit for' closing nthefmotor and L lccklcircuits Y '18. In,combination,ca-vliatchway'fdoormcw able to open andclosed positionsfan-eleva i tor car, an electrica-lly-, controlled)loclcforf the door, door operatingJinechinismfincln'dingav motor and circuitsqincludifng thei'lock and ifmotoi and Aso constructed and larranged that the clcsin-goffthe circuit Will-release the:y

v andmoto-r fand so'f cnstructe'drand arranged tliatitlreclosiiigiroifthef circuitwillreleasef the? lifting'the door countervveight. 2l.- In" combination; a vertically moving disposed at the-:floor level and a manually operablesWitCh controlled When closed by' the-1 motor: circuit lfor closingy the motor'.V and *fio locl; circuits. Y rf K 20. yDoor 'closure mechanism' comprisinga'f door, a'fcounterweigh-tfconnected' to open saidl ,andfadaptedto be closed when thecari-"is i,

door;` amoton'a' crank shaftdriven' byth'e motor, crankfca'rried' b vsaid crank` shaft Vand rotatable said motor fand connections i so constructed and arrangedthat the rotation oi'fzsaid crank through a portiono af'rev'olu' tions Will raise said counterweight and :the rotation 'ofthe cranlrthroughfthe rest 'of :the revolutionW-ill lower the counteriveight; and countervveightingimeans operatively vconnectiedtosai'd crank shaft orassistingthe motor' ini rotatingthe" cran-lr= inf one directioni and door motero erated mechanism? includinfr-raf Y crank shaft and acr'ank for' Controlling:the`

openingh and closing' off thev door, fmanually controlledrneansi includingr afs'witchf 'fori settingthe motor operated mechanism iii-op? l.

eration, and switch means controlled by the crank. shaft for discontinuing the operation' Sii off; said-l mechanism vwhen ithe doorhas'tbe'enig 1 22.1 fDoor closure mechan-isincomprisingt ar d door, ,motor operated mechanism including; .a-1 crankk anda switch rotatablegwith said'crank for controllingthe motor' circuit andeffecting-` the .openingand closing` fof .theg door, f sai-d` mechanism being constructed ,v andA arranged 'tofeifect thezopeningof the doorduringy the4V movement fof the crank. through; aportion of.

its irevolutionandlto eil'ectjthe closingfof lthe Y door ias the crank moves through l thefrest of 'itsfrevolutioir Y 2B'. Door closurek mechanism .comprising.a

door, linotor operated meclianisiiiincluding af crank and a switch rotatablewith saidfcranlry for' controlling the motor, circuit andfefect ir'i'gthecpening and'closing of-tlie doorf, said mechanism' being constructed andarranged to effect thefopening of the doorl during ,thei` movementof :thecrank through a portion of its revolution and` to eect the 'closing ofthe doofraasthe crank' movesthronglnthe rest'V of its revolution, said switch being' construct-- ed: andflarrangedfto openthe' inotorf circuit f Wheirtle motor'ha'siinoved'the crank'th'rough' the door'opening'or"dor'closing:portion Vof' its revolution'- c Y *Y Y. I

24;' `Door,"closurel mechanism comprisingl a door;v a motor,y aJ cranlrrotatable th'e'n'i'cito'r2 operative' connections controlled by thel crank and so constructed andarranged that rota-tion ofitliezcranl` 'thro'ulgli- 'one-half of la 'revolution will effect the opening'offtlie door and vrotalill() 8 l iyzeefzaaV 25. Door closure mechanism comprising a door, motor operated mechanism including a crank for effecting the opening and closing of the door, said mechanism being constructed and arranged to effect the openingV of the door during the movement of the crank through 180 and to effect the closing of the door during the movement of the crank through 180, and means for opening the motor circuit when the crank completes eachl half revolution.

26. 'Door closure mechanism comprising a door, a motor, motor operated mechanism including a crank for effecting the opening and closing of the door, said mechanism being constructed and arranged to effect the opening of the door during the movement of the crank v for said lifting means movable through onehalf the distance of movement of the door from closedt-o wide open position, for effecting the opening and closing of said door.

28. Door closure mechanism comprising a door movable vertically to open and closed positions, single lifting means operatively connected to both side edges of the door for mov-l ing the door to open position, said operative connections being so constructedv and ar- 'ranged that the lifting means in effecting the movement of the'door from closed to open pof sition moves one-half the distance of movement of the door, and means for raising and lowering said lifting means.

29; Door closure mechanism comprising a door movable vertically and laterally to open and closed positions, single lifting means operatively connected to the door for moving the door to open position, said operative connections being so constructed and arranged that the lifting means in effecting the movement of the door from closed to open position moves one-half the distance of movement of the door, and means including a crank for raising'and lowering said lifting means.

30. Door closure mechanism comprising a door movable vertically and laterally to open and closed positions, single lifting means operatively connected to the fdoor for moving the door to open position, said operative connections being so constructed and arranged that the lifting means in effecting the movement of the door froml closed to open position moves one-half the distance of movement of the door, and means including a crank for raising and lowering said lifting means, said crank being movable through one-half a revolution to raise or lower said lifting means.

y3 1. Door closure mechanism comprising a plurality of doors movable vertically to open and closed positions, lifting mechanism for effecting the vertical movement of the doors to closed position, said mechanism including a driven member, and operative connections between said driven member and each of said doors, said connections including means providing for-'variations between the amount of travel of the driven member and the doors operated thereby.

' 32. In combination, a door, closing mechanism therefor, operative connections between said closing mechanism and said door, said connections including resilient means to varythe length of said operative connections, and spring actuated means operatable only as the door approaches closed position for moving'the door into fully closed-position.

83. In combination, a door, closing mechanism therefor, operative connections between said closing mechanism and said door, said `connections including resilient means to 'vary the .length of said operative connections, and spring actuated means operatable onl as the door approaches closed position an vengageable with the door for moving the door into fully closed position.

34. In` combination, a door,closing mechanism therefor, operative connections between said closing mechanism and said door,

vand spring actuated means operatable only a'sthe door approaches closed position for moving 'the door into fully closed position.

A35; In combination, a plurality of floor levels having a hatchway door opening at yeach floor level, a hatchway door disposed at each floor level and located out ofthe hatchway, each door being movable vertically and laterally to open position, lifting means connected to each door, and means extending through the floors at said floor levels for controlling said lifting means.

36. In combination, a plurality of floor levels having a hatchway door opening at each floor level, a hatchway door disposed at each loorp'level and located out of the hatchway, each door being movable vertically and laterally to open position, and lifting means connected to each door, each lifting means beingV movable through one-half the distance of movement of the door` moved thereby from closed to open position in' effecting the opening of the door.

37.. In combination, a plurality of floor levels having a latohway door opening at each floor level, a hatchway door disposed at each floor level and located out of the hatohway, each door being movable vertically and laterally to open position, lifting means connected to each door, and means extending through the floors at'said floor levels for controlling said lifting means, eachV lifting means being movable `through one-half the distance of-y movement of the door moved thereby'from closed to openpositionfin effecting the opening of the door.Y`

38. Incombination, a plurality of floor levels having a. hatchvvay door opening at each floor level,'a hatchway door disposed ati each iioor level and located out ofthe hatch-N Way, each doorbeing movable vertically and laterally to openposition, lifting means con'- nected to each door, and single means eX- K tending through the floors atsaid floor levels for controlling said lifting means.

39. In combination, a'plurality ofifloor levels having `Vafhatchvvay door opening at each floorlevel,ra'hatchvvaypdoor disposed at each Hoor level'and located out of the hat-chmeans tofopen the doors.`

openings,l a door for each opening, counterv balancing means connected to each door for openingrthe door, andV a member-having means engaging said couterbalanoing means` and movable to ypermitsaid counterbalancing 41. InY combination, a plurality of doorV openings, la door for' each'opening, countere balancing means connected to each door for opening the door, and a-cable havingy abut-v mentsthereon engaging said counterbalancing means and 'movable' to permit said coun.- terbalancing'mea'ns'to'openthe doors. v, .n y

42: In combination, a plurality 1 of door openings, a doorforf each opening, a counter- ,balancing means connected toeach door forV moving the door, and-a member having t door, sheaves carried thereby, ieizible means I connected to the sides of each door and passing around saidsheaves, and lifting means ,for said counterweights passing through the counterweights and between said sheaves.V y

"46. In combination, a plurality, ofhatch- Way-doors vertically movable to open and closed positions,` a counterweight operatively connecte'dto each door, and lifting means for said counterweights passing through theV n counterweights. I

'47. In combination, al kplurality yof door "openings,.a door for each opening, counter-v balancing means connected' to each door for opening'the door, and a `member havin means engaging with and controlling the operation of Isaid counterbalancing means to movethe door. p e 48.. In combination, a plurality of door open1ngs,adoor for each ope'ning,'a counter- Vbalancing means connected to each door for opening the door, and a member having means engaging. with and selectively con? trolling the operation of said counterbalanc- Ying, means to movethe door. l

n 49. Door operating mechanism comprising@ gr. so

a door movableto openv and closed positions, i

in unison with said vcrank for counteract- Aing the, Weightoffsaid tension member. Y ,Y I In-.Witness `whereof, I havehereunto set my hand this 27th day of June,'1927.` CHARLES C. TOMKINSON. InWi-tness'whereof, I have hereunto'set.

Vmy handf'this 27th day of June, 1927. I, HoRATIo P YvAN oLEvE. y i

means engaging and. controlling the operation of saidconnterbalancmg means to move f the doorssaid counterbalancing means be- Ying movable relativeto said means.` r v 3,43. In combination, a-plurality of doorv openings, a doorfor .each opening, counterbalancing means` connected to each door lfor moving the door, andafmember passing f through said Vcour'iterbalancing lmeans ,and

having means V:rjaovablewith said member- Y and engaging andcontrolling the 'operation j Y of said counterbalancing means to move the vvdoorspVU j Y @1,1"

44. In combinatiomla plurality-'of *doorl f openingsa.door foreach opening,acounter L Weight 'connected 'to each door for .moving thedoor, and a'member passing through the l center ofk gravity ofsaid countervveight and having means movable with said. member l y and engaging and` controlling the operation of said countervveight to move the doors. 1

45; In combination, a plurality -of hatch- Way doors vertically ,movableV to openand closed positions, a `countervveight for each 'a motor, a crank rotatable by said ymotor,'a tension ,memberl operatively iconnectingsaid f crank and said door, and aweight rotatable

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