US1468981A - Interlock mechanism for elevators - Google Patents

Description

Sept. 25, 1923. 1,468,981

- T. H. sTRALEY INTERLOCK MECHANISM FOR ELEVATORS Filed March 2l 1921 8 Sheets-Sheet 1 ill Illu".lllllllmlnlllnhl lull Hmlullhlm l 43 Sept. 25, 1923.

T. H. sTRALEY INTERLOCKMECHANISM FOR ELEVATORS Filed March 21. 1921 8 Sheets-Sheet 3 sept. 25, 1923.

R 1,468,98 T, H. STRALEY INTRLocK MEGHANISM FOR LEvA'roRs Filed` March 21. 1921 s sheets-sheet 4 Q l, vl .illl

U5 LO o l ifi; Fll* iin -TH .mil d, H |11 l u: *if 1 ,m4 wie@ Ar off/viv sept. 25, 1923. 1,46s,981

TQ H. STRALEY INTERLOCK MECHANISM FOR ELEVATORS FledMarch 21 '1921 8 Sheets-Sheet 5 Q C) nvm/Tof? Ar onf/vir Sept. 25, 1923. ,468,98l

` T. H. STRALEY INTERLOCK MECHANISM FOR ELEVATORS Filed March- 2l. 1921 8 Sheets-Sheet 6 MVM@ ATTO NEY nept 25,1923. 1,468,98l

. T. H. s'rRALEY INT-ERLocK MECHANISM FOR ELEvAToRs Filed March 2l.' 1921 8 Sheets-Sheet '7 l A T; OHNEY sept. 25,1923. 1,468,981

T. H. sTRALEY INTERLOCK MECHANISM FOR ELEVATORS Filed March 2l. 1921 8 Sheets-Sheet 8 Patented Sept. 25, i923.

THOMAS E. STRALEY, F PHILADELPHIA,

rniiiisriivenie, .essie-Noe To; STANDARD nina-veroniNTnRLociz coiiiiuiiri,l or Parisiens-nerim, riiNNs-Yiivniirii, A con-` Yroii-A'rioN or PENNSYLVANIA. Y f

in'rnnloor; irnoiieNisi/i :ron ELEvA'rons,

Appiicatipii inea Nami 2i,Y isai.Y serieu No.'lisiieaV Be a citizen ot the United States of America, residing iirljliiladelpliia, in thecounty of Philadelphia.and State .of Pennsylvania., haveiiivented a new and useful Improvementir; Interlock Mechanism for Elevators, of Vwhich the "following is a Vspeciication.

T he object of the invention is to construct an interlock mechanism for use iii elevators operated by diiierent kinds of motor'and control mechanisms; the interlock `mechanism being Vso designed and constructed las to prevent opening 4ot the enclosure doors at the. i'ioor landings until the car is at the desired landing, yand the carfcontrol mechanism is inits stop or o i position. When Athe cir-isv at rest ata landing, and the en closure door unlocked, and'open, the interlock mechanism also renders it impossibleV to operate the car control mechanism. Conversely. it alsoV prevents the operator ofthe cui' from starting liiscar until the enclosure ldoorlias'been `moved to its closed position,

and securely locked. c Y

Y'The ypresent interlock' mechanism is easily and readily attached to the Well structure at the Yiandingsand connected to the ein. Vclosure doors and Vcar control mechanism,

and does not alter the appearanceof the elevalor in any Waytm. Y

Furthermore, in case the Vinterlock mecli- :mism-at any of the'laiidings is damaged, it does not interfereivith theoperation ot' the interlock mechanism at the' otlierlandings noiyivith the normal operation of the lt is atlantedvto-.be used With either hydraulic or electric elevators; sWitch'con-- trol. mechanism generally, with horizontally sliding enclosure doorscperable eitherirom the right or left hand;fvertically`sliding up-aiid-doivn doors; vcar lever control mechanism with ,toot button operationA oi the interlock mechanism,Y car hand Wheel control mechanism, With foot button operation of the interlockV mechanism; andk car i hand ,rope control mechanism, with foot button will t known Vthat I, -Tiioiiiis' LSTRALEY,

yFifgfure .7', on line 7-7.-.

described fin the speciiication, c and Y pointed out in the claims, arid illustrated iiilthefaccompanying` drawings, in wvhich-v Y* A,

f lFigure isa viewiii elevation ot the interlock mechanism, looking at its front side as it appears in the igure,its parts being in the position theviassumeyvhen the inerch .anism is unlocked, `and the enclosure! o r Y Aliatcliway door isfully opened. 3

Figure?J a front view, Withthe parts iii the position they assuineivhen themech- ".anism is locked,and theV door lfully closed.

Figure 3 is a view in elevation, taken on Y:the4 dotted :line'B-S in Figure l, looking in' fthe direction the arrows are'pointed.V

Figure 4C' isY al View inV elevationV ot,y a bracket, 4adapted toA be fastened to the botvtom .of theV car, a link1 a fork, a roller, and a coupling to connect the link tothe car con-l trolY mechanism, and for' other purposes hereinafter described, 2 v :ligu're-V is a view iii elevation of the interlock mechanism, looking at itsfroiit, and assembled with theparts mentioned in Figuro et. Figure 6 is an end View in elevation of Figure 5, but withoutshoiving the bracket. Figure .7 `is a View in: horizontal sec-tion, theinterlock mechanism,

taken through Figure 8 a view in horizontal .section` taken through the interlock fmechaiiism,

with themechanism .locked by itsYlatch engaged with the channel `piece.

Figure `9 is aY general arrangement view in elevation of the interlock mechanism,

looking' at itsend as it-appears on the ligure,

appliedfto a horizontally sliding doenniith car Aswitch. lever lockedf i, i p .i

Figure l0 isa view-in elevation` ofthe front side or" the interlock mechanism, .as it Jspears in, the ligure, applied to a horizolijr tallyV sliding door, closed, and tlie'interlo'ck and 1car control mechanism locked,and unlocked respectively.

igures llk and l2 are views` similar to 'those of Figures andrlO, except that the t oor verticallyY sliding, andi the part "on Y i thedoorWhicliconnects the latter is shown as a', bell-.crank .control mechanism uii` AFigures 13 and 1,4, are ivieiyslsimilar to Y Figures 11 and 12, except that the door is shown as divided horizontally into two parts, land which are slidable vertically upand-down to open and close.

Figures 15 and 16 are general assemblyA front and end views, with hand lever car control mechanism, and toot button operation. Y

Figures 1T and 18 are general assembly views vwith hand wheel.r car control mechanism, and a toot but-ton operation, kand means to lock the hand wheel.

Figures 19 and 20 are general` assembly viewsfwith hand rope car control, and foot button operation, and a vertically sliding ldoor.

Similar numerals refer to similar parte` throughout the several views.

The parts constituting the invention may be secured immediately to the Vfloor landing; but tor convenience they are mounted on a base plate, 1, having at its lett hand edge, looking at' its front tace, as it appears in the ligures of the drawings, two vertically perforated lugs, 2, spaced apart VVtrom each other, and between rwhich is mounted a vertically perforated knuckle, 3, of a latch bar, L1 on a pin, 5. The latch bar in its normal position lays across the front tace oi and against the base plate, with the ends ot the knuckley spaced aparttrom the lugs, to allow the knuckle to move up and down on the pin, as well as turn thereon, both to swing and move up and down on the pin,

" tromits normal or retracted position to its extended position and vice versa. as will be referred to again later on. Projected -from the front tace ot the base plate` at one side of theknuckle, are two additional lugs, 6, spaced apart from each other, and between which the latch bar is designed to lay in its normal or retracted position. The opposing faces of the lugs, 6, are inclined or beveled outwardly. As the base plate is intended to be atlixed to the floor landing with the knuckle, 3, in substantially a vertical position. gravitational force will tend to' cause the knuckle to slide down on its pin, 5, until it is arrested by the lug, 2, beneath it and the bar, 4, will likewise tend to fall down. and as the inclined face ot the lug, 6, is beneath it. and in its path, the bevel will guide the bar outwardly'to an extended position, and conversely, when the bar is in thatl position, and is thereupon pressed inwardly in the direction towards the base plate to itsretracted position, it will, in such inward movement, be guided upwardly as well ,in consequence of its contact with the bevel tace ot the lug, and the knuckle be restored to its position away from the lug, 2. As the interlock mechanism isdesigned to be used with doors which open either trom the right Vhand or the lefthand, and to invert the base plate to meet that condition, two lugs, 6,

arerprovided; itis evidentv that each lug will function substantially alike, so it is deemed unnecessary to describe the operation of the latch bar and knuckler in connection with both of the lugs,.6; the description ot one being enough to coverv both. of them. one side ot and in a line drawn between them, is a short stud, 7, on thebase plate.l adapted to hold a coiled expansion spring. 8. 1n the latch bar, on its under side, and opposite the stud, is a recess, 9, adapted to receive the stud and spring, and also allow the latter to extend against the latch bar,

is a depression, 10, with its bottom on a slant in the direction ofthe free end ot the bar, adapted to receive the bar in its Yretracted position against the plate. Along what are called the topand bottomy edges ot the base plate, are horizontally-placed open slots, 11.y VIn the slots, shoes, 12, are guided, to which are secured flat slide pieces, 13', which arev held to the base plate by the overhanging heads of bolts, 14, let into the base plate. Between the edge ot the same and the yfree end ot' the flat slide pieces, are tension springs, 15, which serve to Vtend to move the tlatpieces toward the lett hand and the middle line ot the plate. and retain the flat pieces-in that 'central position. is secured to the upstanding side, 16, next The other Yend oithe tl'at pieces to the base plate, oit a channel piece, 17, Y

the other side, 18, of which is virtually parallel with the front ltace of the 'base plate. In the edge ot the side, 16, is a notch, 19, in line withY the tree end ot the latch bar, and of sufficient dimensions to allow it to protrude through the notch when the side, 16, and the channel piece are moved across the front face of the plate towards vits towards the knuckle of the bar, in which position the tree end ot the latch bar is in the notch, 19, in the side, 16, ot the channel piece, 17. In the angle or joint between the sides, 16, and 18immediately over the notch', and in line Vwith theflatch bar, is a triangular shapedY block, 20, with its base line'or outer taceV rounded, more or less,which block is designed to be engaged by the end of the bar when the lat-ter is in its extended position. The rounding of the base line .of the block is merely to facilitate middle position thereon orV the engagement between the block and bar.

It will be perceive-d that, if and when the plate. or, if for any adventitious reason,

gravitational Vforce is not suthcient to cause the said movement ofthe bar, the spring,

8. will add its force to move the barnaway from the plate. At the instant the free end of the bar becomes .free of the notch, 19, its end will bear against that, portion of the side, 16, immediately over thenotch, and between the latter and thev block, 20.

'It the movement ofthe channel piece be arrested at that time, it will be locked against anv4 opposite or reversal movement by the -iact'of the "engagement between the abutting end of the latch bar against the side, 16, of the channel piece. That position ofthe channel piece andV bar may be assumed to represent the lcondition of the interlock mechanism when -the hatchway door is not closed over the ventire opening of the hatchway door opening; but, instead, is only partiallyT closed over the opening. In the use of interlock mechanisms, it is sometimes the practice not to arrange to close the door entirely across the opening, but only to close it part way, thereby leaving an open space between the door and the j amb, but not suiiiciently wide to allow a person to thrust through the open space. It may be explained that such practice is based on the consideration that the use ofVV an interlock mechanism may tend to slow up the operation of the elevator in service conditions, since the door must be in a closed position before the car may be started awav from the landing and the `latter must i be at the landing before the door can be opened, which means in e'ect that the time taken to open and close the door must be,

added to the running time of the elevator. By having the closed and locked position ot the door to correspond to a. partially closed position, say. two, three or four inches left open when the door is in its closed Vand locked position, and the time'taken in opening and closing the door be accord`- ingly lessthan if thedoor be moved across the entire width of the door opening.

`Returning to the descriptionof the interlock mechanism with the free end of theV .latch bar abutting against the 'side,16, over the notch, 19; afurther movement of the channelv piece, 17, in the same direction last above referred to, will serveto free the end vand the block 2O nearest to the base plate.

of the latch bar from that portion of the side, 1.6,.over the notch, and allow the end of the bar to' ride over the rounded surface vof theblock, 20, and'rest in the angle ori-jointV In that Y between the kblock and side, 18. position, the barV locks the channel piece againstpbeing moved in a reversed or opposite direction, which position of latch bar and channel piece denotes the vp'ositionlof the dooras beingtight shut, closed or substantially so,'across the entire width of the hatchway door opening, and locked fin-that interlock mechanism will care for either case ofa door adapted to be shuttight'closed position against being moved `to open it. l'It willbe ieected, therefore, that the present sof across Ythe entire width of the hatehway door opening and thenbe'loc-ked'in that positiony by theA free endof the latch bar 4 engaging the channel piece 17 in the angle betweenit Y and the .triangular shaped block 20 'furthest from the base plate, which engagementk wvill serve to lockthe doorwhen it is tight shut; against being opened in its tight'shut position or adapted to bepartiallyclosed l across'rthe width of the door opening, and

then be lockedin its partially closed position Aby the free end of the latch bar i engaging the channel piece 17 in the angle between it Een plate. `In theend Vofthe other arma27, ofv the Ylever is anotherlfork,2,8, with tine, 29, Y

in a straight line with the-lever, and another tine, 30,` outwardly flared and shorter, than its fellowV tine, 29'. ,The purpose ofthe lever, 25, isto'move the channel piece, 17

across the base plate,from over the free end ofthe latch bar, 4f, bythe closing movementof the door, the tine, 29, serving as a means to vbe engagedby ai projection from the door, as will be explained more fully later on.

The projection -fromthe door is shown in the A caseof the present interlock mechanism as aV bar, 31, and is Vadapted tovbe rigidly fastened to the door,jin a dependent position to have its Afree endstrikeV against the tine, p `V 29, in the closing movement of the door.V

The side Vof the bar which strikesagainst `the tine. 29,v is straight throughout gits length; but the r other side at the end i isv beveled,V` as at32, vforming otthe end of the bar what ,may be generally 'termed a conical point. Asthe tork,j23 swings in the are of circle,:and thebar,-31, moves in, a horizontal straight line, it will 'be perceived that byV makingthe--tine, 30, shorter th'anlthetiine, 129,. Y k.morezbearing. surface is obtained between the 'bar vand tine, 29, than could be obtained were the Vvtines of'e'qual length. VByiflaring theV tine, 30 outwardly, wear Vis lessened between the tine', 30,' and' the bar, 3l, i'n-their operation of separating from each other;- but the gist of the matter of incline or bevel, 32, in connection withthe iarediltine,130, is that when the door, by the contact of the straight side of thebar, 3l, against the tine, i9, turns the lever, 25, to its locked position, of the latch' bar engagedkv with the' channelV piece, and the door reaches its closed position, the door may rebound therefrom slightly, and in such event, there is room' enough'vfor the in-' clined or beveled point of the bar to ,moveV Vslightly in the space left Abetween the bevel and the flare, by reason ot thebevel and flare oli-,the tine, 3f). straight lever, 25, and straight bar, 3l, are ordinarily used when the door is hori7ontall5y sliding; but where thedoor is verticallysliding, a bell-crank lever, is resorted to, and` the beveled 'point ot the bar is set at a right angle to the straight side ofthe bar, asindicate'd in the figures or' the drawing. In the case of Vthe single door, vertically opening, the'ia'red tine. 30, andthe bevel,-32,- of the bar, 3l. are set in an upward direction, as shown in Figiiresfll. and l2 ,and in the case oi a two-part. vertically openino door, one part to be moved upwards and the other part downwards, the bevel andg flare directed down'- wardly, as shownV in` Figures 13 and let. As the interlock mechanism is designedl to be Vusedl vfor Vhorizontally sliding doors which open either from' the right hand or left hand simply by inverting tie baseVV plate, l,

Ltwo bevel pieces; 6, have been'provided, one

oneach side of the latch bar, 4l, as has been sta-ted, and tivo holes 34, inthebase plate are provided, in either one otwhich the pin, QG, can be fixed on which to mount the lever, 25; but inV the case of either right hand or lett'hand opening door therstraightV side ot the bar, 3l, shouldl be set to engage the straight tine, 29.

The description will now proceed to describe the connection betweenV the lock mechanism, already described, and adapted, to be secured to the door landing, andthe car control mechanism and the means whereby the latter isl interloclred 'with the door when the latter is in its open position. There is a'braclet, 35, which is adaptedtto be fixed to the bei l with perth itsplattorni, C, ated lires. w3, in whichis apin, 3l-on i liich is pivoted alink, 38,' with a perforati *L 39. n ar its 'middle'.andfat its tree end,

l. etended'troni ne side thereof, is a forli, con! stitnted of two lugs, 40, with inclinediopposite side walls, 'forming a 'flared opening be# tween t Le.n; On the otli'erside ottheflink-is a rollen-All..V The side, 18,0113 the channel piece has already been inentioned',but itis designed that the forli shall'enibrace the free edge of the side, 18, and oneV of its lugs, 40, bear against the, inside 'of the side," 18, tol prevent the vcar control. mechanisml from; bein g operincensi ated whenthe door is open (see for convenience, Figure l), as will he presently described. On aceiint or the act that it is not always the case that the car stops level with the Hoor landing or remains level therewith, the side, 18, is made or" suicient length to insure th at'it will invariably present a point* ont engagement therewith of the-lug, 40, and its ends rounded to allow some llexibihty of contact between the lng and the free ends ofv the side at the beginning of their engageso remain therewithy when stopped thereat, f

the latch bar is widened, by means of wings, 42; and the tips, 43, are rounded to faciliktate ease ot engagement between them and the roller. ln the perforation, 39, in the link, is a: pin, dit, pivotally securing thereto a' coupling, i5, :which is connected to a rod, itl, theotlier end of which is connected to one arm, 47, otabell-crank lever, 48,

fiilcrinned on '1W-'a fixed to a car, iineath its plattform, C, and theother arm, 50, vadapted to be pivotally ected to ai. rod, 5l, and the other end of fred to be connectedby a pin, 52, to ,svvitc i lever, 53, and adapted` to ie movement ot the car leciv controlling the. car.

ver i, See E mechanism is so'sinall that its addition to the inertia o the car control. mechanism is hardly perceptible to the opcratorof the car,y especially se, when,vas is iisiiallyth'e case, the car switch lever isprovided with the 'conventional spring to return the lever to ii's'ccntered or off position. der to tale care ot the iiicr'ivia` of the movable parts or the interlock'mechanism, in the operation of r etiirning thein to the position they are caused 'to' assiiinewhen the door is fully opened,l a tensio` spring, 54, may be employed wi ,zone ends :tast to the arm, It?, ot tne hell-crank lever 48'., and its other end :ist to the car. VVlt willybe ob-r served that', lever controlY mechanism, I thev spring, 53,-v is relatively locatedvrso asy to accelerate the roller, fil, in being moved to engage the latch bar, see Fie'iireslmll, l2, 13 and 14.-. i t. t the car switch lever, 53, fi, e drawings, vis providedwitlr a spring, it will be perceived' that theV spring miiclrets, 49., anapted to beY igiires l0, ll, i2, 1S and 14'. The incr-rV tia or the vmovable parts of the interlock in the'ease of the carV switch.

But in orincase; .i i. Y Y i Y 55 54 andI the springen the car switch mayinutually aidV each other in the movement of the lever to its centered or off `'position and the roller to its position of unlatching the I'latch bar. Asqthecar switch lever and'roller are positively connected together, any movement of the lever serves to move the rollenand, therefore, in that sense, it maybe properly said that the operation ofboth unlocking and locking the latch is automaticjwheii the interlockingincclianism is used with apar switch lever control mechanism. ...See Fig- -ures 9, l0, ll, 12,718 and 14. 1 Y Y In thezcase of an elevator, with aliand lever, 55, control mechanism, adaptedto be swung over a 'quadrant,f56 for instance, -as'l shown in VFigures 15and 16, with'agvertr. cally reciprocal catch, 57, on the lever-,land

notch, 58, in the center, of the quadrant,

adaptedto receive the catch, when the lever,

is in its centered or OHV-position, theend of the rod, 5l, next to the car lever, is pivoted to one end ofa link, 59, and the other end of the link pivoted to the'catch, 577'; but

the movement of the car lever `will not move the roller,` 41;,however, afoot button rod, 60, is provided and verticallymounted in the carzplatform, C, Awith its end projected therethrough, and pivoted to the arni,

50, of the bell-crank lever 48l The spring, 54, is relatively located so',v as .to tend to move the roller 4l out of thev path of the latch bar,

and thereby lock the car lever against beingoperated 'at thatV time, and the vroller be moved against the latch bar, 4, and unlock it, and consequently, the door. AUpon-step ping offof the button, it will be caused to rise to its former position above' the floor, and the catch, 57, also be moved out of the notch, 58, in the quadrant, and the car lever be unlocked; but the door Vbe closed, and locked. The Figures yl5 vand l-showl the parts just mentioned in the relativeposition they assume before thev foot button is stepped on, and while the door is closed and locked. l f

In the case of an elevatorcontrolledby a hand wheel, a third arm, 6l, is added to the bell-crank lever, 48, and the foot buttony push rod,`60, connected to the third arm, and

the free end of a rod, 62,'adapted to enter a notch,` 63, in the hand` wheel, 64, when moved upwardly `by steppingon the foot buttonrod. In this casefthe rod, 62,-locks theV wheel, and",y the roller, 4l, unlocks `the latch bar, 4; In the Figuresl and 18 the rod, 62, is shown out of the notch, the roller swung clear of the path of the latch bar, and

the'foot buttonabove the'ilioorof the car inv position to be depressed'by the foot, and

cause "the rod, 62, to move into thenotch and Y the roller to move-the latch bar tounlock itp type ofy rope lock ,for instance, that which generallyknown inthe art zas the VCjochj ester rope lock, whichisadapted tofbe Se- Y cured to the car vplatformloy a bracket, '65L to: which `is affixed thefrope lock, comprised of a block or piece, 66, havinga perforation therein, through'which vthe control rope is passed,and a lock plate,'67, adapted to be moved acrossv the perforation, to-,n'ar row it ineffect,'so that the-,usual stop'balls on the rope cannot pass throughtheopeningwhen so narrowed, when thek caris stopped at a landing. usual stop vballs on it, as already implied,f spaced apart from-eachV other, so that when;

the car is stopped at a landing, the balls will f3 The rope has Vvvt-hef be one o n each side offthe perforation inthe' f block. rlhe opening in the blockis large enough for the balls to. pass through it in the movement ofthe car. rope-lock shown in the drawings, fthe` walls of the perforation are iaredfoutf` wardly, to facilitateithe movementof the` rope and balls, in enteringI 'and leaving the perforation,.- and vone end of theliat slidev lock plate, 67, Vis'made in the vform of an. open ended slot or fork off .two xprongs, joinedV together at-their base ina lhalf cir-.-

Inv the' forni of f ico Y cle, corresponding to the circular `outlinefof Y the perforation in thel block, 66.' Then the` vr,

lilo

plate.A is movedfto the'rope, the vspace y*or opening left between the platey and ywall off the perforation is more or less elliptical,l and end of. aY shaft, 7l, supported iniibearings,

lsina ler than the stop balls, andtherefore i they cannot bepassed through the block,'66,

49. Theshaft'has"an arm,y50, connected to` the `foot button, 60, and an arm,r4'7, coii-^ nected byrod, 46, to the coupling, 45,*0nV

the link, 38, carrying the roller, 4l,V and a spring 53, betweenthe' arm 47 andV vthe'car platform.v See-Figures'll and=20` While af particular formfof ropeflock is f dis!k closed, it will bel understood that theadapta tion of the interlock mechanism isnot con-V yfined to it, butthat itis' expected that any person skilled in the ait'can 'adapt the inter-j lock `mechanism and a rope-lock of any other kind,`generally speaking?, to eachother. Y -In 'describing Vthe construction ofthe terlock mechanism and litsconnection'with the ear control mechanism, itspri-noiple and mode of operation valso were more or less described; and -therefore,it is thoughtthat it is not desirable or necessary -to add l.to the length of the specification' by consecutively describing its operation.

IVhile the construction of the interlock mechanism hasl been shown, and its principle and model of operation, described more or less in detail, it will be understood that it is desired that the invention shall not be considered to be confined to its present embodiment, but shall include such mere changes in the number, design and relative arrange.- ment of parts as may be'rfound to be still within the scope of the invention.

Having disclosed the invention, 'what is desired to be claimed is:

l. In the art of elevator hatchway door mechanisms for locking the doors in lclosed position, the combination of a latch bar, adapted to be moved both vertically and horizontally the two being compounded'into a resultant motion; anda lug, with an inclinet face. adapted, when the bar is being moved vertically, to direct the bar outwardly as well, to effect an engagement between it and the catch therefor.` f

2. In the art of elevator hatchway door mechanisms for locking the doors inclosed position, the combination of a latch bar, having a knuckle; a vertical pintle; an eye, in which the lower end of the pintle is held; the knuckle being hinged on the pintle, at a distance above the eye, andadapted to fall along the-pintle until it rests on the eye; and a downwardly inclined lug,l .in contact with the bar, adapted to force the bar outwardly in its falling movement,- and an emergency spring, adapted to apply its forcev to the bar in its movement to engage a catch or keeper therefor.

3. In the yart of elevator hatchway door mechanisms for locking the doors in closed position, the combination of a longitudinal latch bar, and a catch or keeper therefor; the latter and the end ot the bar adapted to engage each other and lock the door in closed position, and the keeper havinga notch in it, through which the end of the bar may protrudewhen the said parts are disengaged from each other and the 'door is in an open position.

4. In the art of elevator hatohway door mechanisms for locking the doors in closed position, a catch or keeper for the latch bar, comprised of an angle piece of two sides, and a part projected'from the angle between the sides; the two sides and said part adapted to be abutted by the end of the latchv bar to lock the door in positions against being opened. Y Y

5. In theart of elevator hatchway door mechanisms for locking the doors in closed position, the combination of the locking 1 ,sessel mechanism, comprising a lockingmember,

having a pivoted fork, with two prongs, one

shorter Vthan the other, and flared; a bearingv member,-adapted to be connected to the door,

andi moved thereby rectilinearly, to engage the prongs in the operation of` closing and locking thedoor and opening and unlock` ing the door.

6. In the art of locking elevator hatchway Ydoors in closed position, the combination of a locking mechanism, adapted to lock the door in closed position, comprising a mem` ber having an enlarged opening, and means, i

adapted to be connected between'the locking mechanism and the door, comprising a bearing adapted to be entered into the said opening, and bear against one wall thereof in the movement of thek door in the operation ofimoving it tov aclosed position, but leave a space between the saidbearing and theopposite wall of the said opening, where by, if thedoor rebound from its closedposition inthe operation of closing it, its re-` one straight side to bear againstthe straight tine, 1n the movement of the'door in closing,

and a beveled side, opposite the flare ot the tine, with a. space between the bevel and flare` whereby if the door rebound, its rebound movement will not be transmitted to the locking member, yet, nevertheless, prevent the door from being further opened.- Y

8. In the art of elevatorV hatchway door mechanisms for locking the doors in closed position, the combination of the locking mechanism, comprising a locking member. having an openingtherein` and a bearing, adapted to be connected to the door, and by the closing movement of the door to be en tered into the said opening, and to move the locking member into position to lockthe door when it has reached its closed position against being opened, the lit between the said opening and bearingl member being loose, so as to allow lost motion of the bearing member relatively totheloeking member in 'the rebound movement of the door. Y

9. In the art of elevator hatchway door and car control mechanisms for locking the doork in closed position and the car control mechanism when the door is open, the combination of a latch bar, and keeper therefor, adapted to be engaged with each other to lock the door in closed position, and a lug,

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connected to the car control mechanism, adapted to be held by the keeper when the car is at a landing and the door is in an open position, to prevent operation of the car control mechanism at that time.

l0. lnan elevator car hatchway door and hand opening door, and connected to the con? trol mechanism; and a part or element at the landing, and adapted to bear against.

one of the lugs, and prevent the control mechanism from being operated when the car is at a landingl and the door in an position. Y

ll. ln the art of elevator interlock mechanisms, adapted for use with hand rope-car control mechanism, the combination of a rope-loci.: mechanism, .to be car `ied by the car, and having a. vertical perforation, adapted to receive the rope and stop balls; and a plate, operable to narrow in eilect the gieriaoration7 to prevent the stop balls from being *,'iassed therethrough; a pedal, adapted to be mounted on the car and depressed to the plate to narrow in eiiect thepereration, and mechanism adapted tobe fixed to a l vndingv, and lock the plate against being opened when the car is at a landing and the hatcliivay door is in its open position; and connections between the pedal, the plate and the locking mechanism, whereby, by depressing the pedal, the plate is operated to lock the rope between the stop balls, and unlock the latch bar of lthe door-locking mechanism, and, upon the door being opened. the door locking mechanism to lock the plate'against being operated to release' the stop balls until and unless the door be rst closed.

if. ln an elevator, the combination of the car, cai' controller ending door, or' means at thelanding floor and mechanism on the car, adapted to be operated by .le saitpedal, said mechanism comprising a part on the lever, adapted' to lock the lever in its neutral position and another part, adapted to be operated by the pedal to unlock the said d0or-locking means,

and another part to engage the door locking means to preserve the locked condition of the lever.

l2.L ln an elevator, the combination of the 'open lever, and hatchivay i to effect the locking of the said door, apedal,

car, car controlling lever, and a landing door, and apart or 'projection ai'iiXed to the door, mechanism at the landing, to effect the locking ofthe door, said mechanism embracing a part,ada.pted to be reciprocated, positively in both directions, as the result of an engagen'ient betrveenfit andthe said projec- Vtion onthe door,y andmechanism on the car adapted to be operated bythe movement of the car controller lever, comprising a part adapted to lock the lever in its neutral position and a. part adapted to unlock the door locking mechanism, and become engaged With the saidreciprocable partthereof, to

continue the locked vcondition of the doorV locking mechanism.

lll. In an elevator hatcliivay door locking system, means adapted to lock the door when closed or in a predetermined partially closed position, comprising a latch, a movable keeper therefor, meansV between the door and keeper, whereby the doorin movement to a closed or said partially closed position el iects a movement ot the keeper, the latter characterized vby having detents adapted tov be engaged by the latch, the location of the detente relatively to each other corresponding in effect to the closed Vand said partially closed positions of the door, andto checkor prevent the operation of 'opening the door when itis in its V`closed position and further opening the door when it is in its said partially closedgposition.V

l5. lnan elevator' safety"systemvherein Y the hatchivay door and the car control'mechanism are adaptedYV to be interlocked with each other when the car is ata desired landing, the combination of means adapted to lock they door when closed, a movable keeper therefor, means between the door and keeper whereby the door in its movement to a closed or said partially closed position effects a movement ot the keeper, the latter provided With detents 'adapted to be engaged by the latch, the dete-nts being relatively locatedto each other Vto* closed and the door, and to lock the door against being opened when it is in its closed orsaid partially closed positions, and mechanism whereby the latch can be disengaged from the detents and the ldoor be thereby iinlocked, and, npon opening it'trom its closed positions, the car control mechanism be, prevented from being operated. Y Y

In testimony whereof, I have signed my naine to this specification.

`Tiioims ii.. sfrniiiinv.- l

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