US1892420A

US1892420A - Closure operating mechanism

Info

Publication number: US1892420A
Application number: US426034A
Authority: US
Inventors: Brady Thomas
Original assignee: Otis Elevator Co
Current assignee: Otis Elevator Co
Priority date: 1930-02-05
Filing date: 1930-02-05
Publication date: 1932-12-27
Anticipated expiration: 1949-12-27

Description

Dec. 27, 1932. BRADY 1,892,420

CLOSURE OPERATING MECHANISM Filed Feb. 5. 1950 3 Sheets-$heet 1 "'7 May d 1 W 03 INVENTOR BY ATTORNEY Dec. 27, 1932. BRADY 1,892,420

CLOSURE OPERATING MECHANISM Filed Feb. 5,1950 5 Sheets-Sheet 2 \llllllllllllllu ,a@ a is :4

WM (13% INVENTOR MW ATTORNEY Dec. 27, 1932. BRADY 1,892,420

CLOSURE OPERATING MECHANISM Fi'led Feb. 5. 19:50 5 Sheets-Sheet s INVENTOR ATTORNEY Patented Dec. 27, 1932 UNITED STATES PATENT 'FifiE 'rnoMAs BRADY, or EAST ORANGE, new] JERSEY, 'assreivcr. T0 OTIS ELEVATOR COMPANY, or nnw YORK, N. Y., A oonronnrron or new JERSEY CLOSURE PERATING MECHANISM Application filedlebruary 5, 1930. Serial No. 526,034.

The invention relates to closure. mechanism and particularly tomechanism for operating closures controlling access to an elevator car and to mechanism for interlocking 5 closures with the control of the elevator car.

It has been found desirable to operate the hatchway doors and the car gates of elevator plants by power mechanism, particularly in installations vin which such closures must be 0 frequently-operated or in whiehtheir manual operation is inconvenient. 1 Such power mechanism maybe employed to effect both the openingand closing of the closures or may; be employed to effect, operation of the closures i11' only one direction. Also, such mechanism may be employed to operate both the hatchway doors and the car gate or to operate either of them. In the case of the hatchway doors, it is of considerable advantage that the same power mechanism be employed to operate all of the doors of a particular installationas this avoids duplication of power devices at each of the landings served,- ;In such cases it is of advantage that the doors be disconnected from the power device and the operation of a hatchway door be efi'ectedbycoupling the door at the landing at which a stop is made to-thepower mechanism. It is also of advantage, in cases where both the car gate and hatchway doors are power operated, that the same power device be employed for operating the car gate that is employed for operating the hatchway doors When the mechanism for; operating the hatchway doors and car gate is common to the doors and the gate, it is desirable that such mechanism be carried by the elevator car, particularly as such arrangement lends itself to simplicity of construction of door and gate operating mechanism. Where the same power device is employed to operate the car gate as well as the hatchway doors, it is also of advantage that'the car gate be disconnected from the power device and coupled thereto when the operation of the gate is to be effected. The invention, in part, is directed to power operating"1nechanis1n for a closure of an elevator system in which the mechanism is disconnected from the closure 3 and in which the operation of the closure by the operating mechanism is effected by coupling mechanism and closure together.

It is also advantageous when power; devices are employed to operate the closures affording access to the car that checking devices be provided to bring them to rest easily and quietly. It is preferable that such checking mechanisms may be readily adjustable to suit-the requirements of the closure in various installations in order that a separate checking mechanism need not be designed for each installation. s It is also desirable,particularly in elevator installations in whichthe operation of the elevator car is under the controlof the passengers or intending passengers themselves, that suitableinterlocking mechanisms be provided to prevent the operation of thecar when the car gate or any of the hatchway doors are in open position in order to lessen the possibility of injury to passengers or prospective passengers. Such interlocking mechanisms for the hatchway doors comprise a locking mechanism for each hatchway door arranged to lock the door in closed position and switching mechanism controlled by thelocking mechanism for preventing the operation of the elevator car except when all the doors are locked in closed position. In connection with such interlocking mechanisms it is preferable to provide suitable operating mechanisms therefor arranged to unlock the hatchway door at the landing at which a stop is to be made upon arrival of the car thereat.

Due to faultsthatmay occur in the construction of buildings it is sometimes discovered in installing elevators that the clearances between the edge of the car and the hatchway doors are not uniform at various landings. present difficulties to the installation of auxiliary equipment, such as closure coupling and operating devices, on the elevator car and on the hatchway wall in that they reduce the available space for such equipment and tend to interfere with the uniformity and positiveness of its operation. The invention is further directed to closure coupling and operating mechanisms adapted to overcome these constructional defects and assure uni- These variations in clearances O erating. motor on the car.

formity and positiveness of operation of the closures.

One feature of the invention resides in the provision of a power driven closure operating mechanism carried by the elevator car and normally disconnected from the car gate and hatchway doors in conjunction with electromagnetic means for coupling the car gate and the hatchway door at the landing at which the car is positionedto the closure operating mechanism for operation thereby.

A second feature resides in the provision of magnetic means for establishing and maintaining the coupling of aehatchway door to a closure operating mechanism carried by the elevate-rearregardless of variations in clearance between the hatchwaydoors and the elevator car.

third feature resides in magnetically coupling a-car'gateto a powerdriven closure hatchway door to the closure operating mechanism for operation thereby.

A seventh feature resides in preventing the operation of a closure operating mechanism to operate a closure unless and until the control circuits for the elevator'car are interrupted to prevent its'operation' during the operation' of a: closure.

An eighth feature resides in the provision of an adjustable checking mechanism, and

operatingrmechanism therefor, for retarding a closure in the final part of its movement.

Other features and advantages will be.- come apparent from the specification, taken in connection witlrthe accompanying drawings wherein one embodiment of the invention is illustrated.

In the embodimentof the invention to be described a closure operating motoris carried by the elevator car. This motor'drives a carriage slidably mounted on the car for movement transversely of the entrance of thecar. The hatchway doors at each landing are provided with movable armatures. Electromagnets mounted on the carriage act, uponenergization, through their magnetic fields to attract the armature on the hatchway door, at thelanding at which the car is positioned, to couple the hatchway door to the carriage for operation by the closure op- The invention by the motor to operate the hatchway door.

A switching mechanism mounted on the carriage isarranged rate operated by the JIIOViLbllQ armature on the hatchway door upon its attraction to the carriageby the electromagl'iets. This switching mechanism controlsthe operation of'tli'e closure operating motor to prevent its operation except when the hatchway door is coupled for operation to '-tl1e -carriage. Suitable limit switches operable by the carriage are provided to terminate the operation of the'motor for drivin 'the'ca'rriage when the door'and gate'ha'v'e eenmovedftoopenjor c'losed p'osition. 1

The armatures onea'chhatchway do'orare arrangediwhen in nna ttracted position to lock the hatch-way 1 door in closed position and to control switching mechanism in-the control circuits of the elevator car for preventing the operation of the elevator-car-when any I hatchway-door is unlocked. The int'errup' tion of the control circuits'forth'e elevator car and the unlocking of the hatchway door at the landing at' 'which the car is positioned is effected by the movementof the armature onthe'hatchway doorupon it's attraction by the elect'roma'gnets to couple the hatchway door for'operation to'the motordriven carriage on'the car.

Checking mechanism is also providedt'o re- 3 tardth'e gateand door in the-final'part'of their opening and closing movementsto insure that they will-be broughtto resteasily and quietly. This checking mechanism is adjustable to accommodate'varying requirements of closure operation, such as variations in 'the extent of closure movement, in different-elevator installations In the drawings i Figure'l' is a View, partly in section, of a I portion of an-elevator installation embody mg the present invention illustrating the elevator car posltioned ad acent a hatchway door, the couplingdevice beino showni'n inoperative position Figure 2 is a view of a portion of the elevator car'and the adjacent hatchway door illustrating the coupling-device in operating 'position and the hatchway door locking mechanism in unlocked position, parts' heing'shown in section to illustrate'details of construction; a

Figure 3 is a view taken along" the line 3-3 of Figure 1 of a portion'of the front of an elevator car embodying'the coupling device of the present invention, with the movablecarriage displaced from its operating position-to facilitate illustration;

Figure 4 is a sectional view taken along line HofFigur'e' 1- and illustrates there:-

.lation of the coupling device of-thepresent invention to the car gatezand a hatchway .door and :showsthe hatchway; door locking mechanism in locked positionp k A i Figure-5 is an enlarged view ofthe switch on the carriage, parts being shown in section;

Figure 6 is a; section on line, 66 of Figure 5; i Figure 7 is an enlarged view, with parts in section, of one of the limit switches for controlling the a closure operating motor l Figure 8 is anenlarged view ofthechecking device illustrated in Figure 1, parts being shown .in,,s ection; v r EigureQ atsectionalyiew taken along line 9-9 ofFigure- 8, illustrating details 0f construction; and x j i ignite-.10 is a diagram of a part of the control circuits of an elevator system in whichthe operation of the car is controlled by an attendant illustrating ;the adaptation of the g closure coupling and operating mechanism,to suchasystem.

.Referring to the drawings, the elevator car designatedfll, raised and loweredin .thediagtchway by cables attached to p the car s n esis a ede ia h by 2 As n- ,port ee, substantially U-shaped form, is secured. to and extends ,betwe en the side members I of, the; carsling above the car and parallels the sides ,and frontof thecar. A gate 26 extending across the entrance of thegcar is suspended from .hangers '27 provided with rollers 23engaging a track 30. The track, is carried by :a plateQS, mounted onsupport 24andacts-to uidethe gate in movement transverse of at e car entrance. Another support 31 is secured to channel members 32fastened: to. the cross-head 33 of the car-sling and supportsa guide 3 t extending across the car entrance. {A third support 39 ismounted on plate 29 and carries a' guide 20.. A carriage 35,- provided with rollers 36 engaging the guides 20 .and 3%, is

' adapted to be moved relatively-to the car entrance by a motor 37 mounted on the members 32. The shaft of motor 37 is provic ed with a sprocket 38. Sprocket 38 drives a second *sprocket 4.1 through a chain Sprocket 41 is mounted on a shaft 42 journalled 'in a bearing support 43. The shaft 42 extends through bearing support 43 and carries a sprocket 44 connected to, a similar sprocket 45 by a chain 48. Sprocket 45 is mounted on a shaft 46 journalled in another bearing support 47. The bearing supports 43 and 47 are secured to the

supports

31 and 39 andalso serve as spacing members therefor. The upper tract of chain 48 is attached to carriage 35 so that,v upon, operation of motor 37 in either direction, the carriage is moved transversely of the car entrance.

Electromagnets 50 are mounted on plates 22 secured to angle members 51, preferably of non-magnetic material such as brass depending from carriage 35. The magnets 50 are mounted with their pole pieces positioned between the angle members 51. A plate 52 of magnetic material is mounted onasupport 49 secured to the upright bars 59 ofthe-sliding gate '26 and is positioned so a'sto be opposite magnets 50. Thus, upon energization of the magnets 50 the lines of force'e'manating from the magnets permeate-the plate 52 to establish 'a magnetic coupling between the gate and carriage 35.

- which serve as pivots for bell cranks 62,-; gOne arm of each bell crank is-pivotally connected toxa member .63 whichis of nuignetic'anate- -rial.-.--. Member 63. serves as an armature for magnets 50 and is adapted to be attracted into close juxtaposition with the pole pieces of the magnets, as illustrated in Figure 2, whenever the magnets are energized. The other 'armsof, the bell cranks. are pivot-ally connected to members 64 and 65' which are connected by a rod 66 guided through a lug 67 on plate The arrangement of the connections of the farmature 63 to plate 60 issuch that the weight of the armature normallv mainta ns the latter in the position illustrated in Figlure 1.; Member extends through a guiding lug 7,0 on plate 60 and-isconnected at its lower end to a rod 68 whichserves as a grip wherebv the armature 63 maybe manually raised when desired.

The angle members 51 which are mounted on and project from the carriage receive'the armature 63 therebetween when the armature is attracted. This arrangement prevents the coupling of the door 54 to carriage 35 be ng broken due to the possible occurrence oflateral mot on of carriage relatively to the armature on operation of the carriage by motor 37. -Toothed rolls 80 are supported by brackets 69 mounted on the angle members 51. The rolls 80 arepositioned between the angles 51 with their axes parallel to the path of movement of carriage 35. These rolls maintain the face of the armature a slight distance away from the pole pieces of magnets 50. They also reduce the friction that would result in the movement of carriage 35 longitudinally of the armature if the car is raised or lowered. as in a levelling operation, after attraction of the armature by the magnets. The face of the armature is covered by-a leather strip 78 to'obvi'ate'the possibility -of"noi'se' due to contact of the-armature with the rolls when the magnets-attract the armature. Theteeth-of rolls 80are'out transversely'of their axes and are adapted to be imbedded in theleather strip 78 to aid in obviating the possibility of breaking the coupling due-to side slippage of carriage 35 relative to the" armature. The armature 63 operates switching mechanis'm arranged'in' the control circuits; an operating roller 821 for the switching mechanism being positioned in the path of movement;- of the armature to be struck thereby when the armatureis drawn to'attractedpos'ition, see' Figure 2. The construction of the switching mechanism is illustratedin 'Figu'res'5 and 6. This mechanism is arranged on a support 81' mounted between the plates 22. The operating roller 82"is carried by a member 83 pivoted at 84 to support 81. The'member 83 is'connectedby' an insulated link 85'to one arm of'afbell crank 86; Bell crank 86 is pivotally mounted iI'1'- 'a; housing 89' which is preferably of'insulating material. The other 'arm'87 of the bell'crank carries a contact'88. A spring 90 is electrically connected'fto a terminal 99"and actson arm 87 to force'contact 88 into engagement with a fixed" contact 91 mounted in housing 89. Contact '91is connected to a terminal'93l A secondfi'xed contact 92 connectedto'a'terminal 95 'is yieldingly mountedin the housing '89 and is positioned to be engaged by contact 88. The armature 63 upon'attraction by'magnets-50 strikes roller 82, causing'the contact 88 to be moved from engagement with contact 91' and into engagement with contact 92; Upon the return of the armature to unattracted positio'n',spring 90 causes the disengagement of contact" 88 from cont-act 92and its reengage'ment with contact 91. Contact 88, in conjunction with conta'ct '92, controls-the circuit for motor37 and, in conjunction with contact 91, controls the circuit formagnets 50, as will be described'later. The movement of carriage 35 to open and close-the gate and door is terminated by the separation'of contacts of

limit switches

160 and 170, respectively adapted to control'the circuits for motor 37. These switches are similar, the construction of switch 160'being illustrated in Figure 7. Referring to Figure 7, a lever 161 is pivoted on a support 162 mounted on base 163 of insulating material. A contact 1'64'carried by one end of lever 161 is adapted to be forced into engagement with a contact 165 on base 163 by a spring 166 mounted between the support 162 and a lug on lever 161. Binding

posts

167 and 168 are electrically connected to contacts 164 and 165 respectively. A roller 169 mounted on the other end of lever 161 is positioned to be engaged by a'cam 171' on carriage 35 when the gate reaches open'position. The engagement of the cam and roller rocks lever 161 about engagement with contact 165. Switch 170 also is operated by cam 1-71,=its roller 179 being positioned to be engaged by the cam when the gate and door reach fully closed position, see Figure 3.

An interlocking mechanism, designated as a whole by 71, is provided for each hatchway door, the interlocking mechanism being arranged to prevent operation of the elevator car except when all the hatchway doors are locked in closed position. Each interlocking mechanism comprises a casing 72 mounted in door casing 58 above thehatchw'ay'door. Gasing 72 is positioned so that armature 63 is aligned therewith when the h'atc'hway door "is in closed position. Armature 63 is provided with projections 76, lugs 77 being provided within casing 72 forfcooperation with pr'ojections 76 to prevent armature 63' being moved la'tera'llyk with respect to casing '7 2 when the hatchway door is-closed and'arma ture 63 is in its lower position, see Figures 1 and 4. Thus,-it ,willbe seen that under these conditions the hatchway door can not be opened. bridging contact 73 carried'by the armaturenear its upper end engages a pair of; contacts 75" when the armature isin its lowerpo'sition'. The contacts 75 of each of the interlocking mechanisms 71 are arranged in a control circuit for the elevator car, such as the starting circuit, to prevent the operation of the car when any hatchway'door is unlocked. I The operating lever 158 of a gate'switch, designated as a whole by 159, isarranged to be engaged by a roller 148 carried by the gate to effect closing of gate switch 159 when the gate is in closed position. Gate switch 159 is also arranged in a control circuit for the elevator car to prevent operation of the car when the gate is opened.

Checking mechanism is provided to retard the gate and door in the latter part of the opening and closing movements thereof by motor 37. This mechanism is illustrated in Figures 1, 3 and 8, the details of the mechanism being shown in Figure 8. Referring to Figures 1, 3 and 8, a shaft 46 extends through bearing support 47 and is provided with a sprocket 96. This sprocket drives a chain 97 to operate shaft 98 through sprocket 100 thereon. Shaft 98 is journalled in bearings 101 on a plate 102 secured to support 24. A worm 103 is formed on shaft 98 between the bearings 101 and is adapted to cooperate with a traveller nut 104 carried by an extension 105 of a walking beam 106 pivotally supported on plate 102 at 107. Studs 108 secure the travelling nut 104 to the extension 105 to prevent the rotation of nut 104 with shaft 98 as the shaft is rotated. The nut, however, is free to turn upon the studs as beam 106 oscillates, The slots in extension 105, through which the studs extend, permit movement of the nut longitudinally of the extension as the support 162 -and moves the contact 164 from through-provided' witha ball-check: 116 which.

permits the liquid in the cylinder to flow from the "side ofthe piston 113 to which the P15130114 rod 111- is connected but prevents a reversal of theflow; The 1innerwall ofcylinder .112 is provided with-spaced longitudinal grooves 117. l'A- by-pass 120: connects one 1ongitud1 nal groove with the ungrooved portio'n'of theoylinder at azpoint adjacent aplug=118 which closes-the Blower end of piston cylinder 112. An adjustable .needle' valve 121 is provided near the .upper end of by-pass 120to regulate 3 its"eifective area-'- A non-compressiblefluid such asioily'is provided in piston cylinder 112,

being introducedxtherein through a filling aperture closed by. a :plug i .The bottom plug 1:18 of the 'piston cylinder has a tongue '125'i'7pivotally supported between 'lugs on plate 102. 1 he other end of beam 106 is similarly connectedv to the piston rod of-a check device-1 27. Checkdevice-127 is of the same constructlon as check device109 and willnot be described.

The-lock nuts 1'26 and coupling members 110-afiord a'means for adjusting the check ng mechanism to accommodate closures having varying degrees of movement without changing the gear ratio of

sprockets

96 and 100 or the pitch of worm I103.

Thezopcration is as follows :-When magnets-50 are energized the lines of force emanating therefrom permeate plate 52 on the cargate to establish a magnetic connection between gate 26 and carriage so that upon movement of the carriage the gate is moved therewith. The lines of force emanating from the magnets also act upon armature 63 on the adjacent hatchway door to attract the armature toward the carriage 35. The initial movement of armature 63 removes the bridging contact 73 from door lock contacts 7 5' opening the control circuits of the car to prevent operation of the car 21 by the hoisting motor during-the gate and door opening operation. As the armature continues to move toward the carriage'the projections 76 are moved away from the lugs 77 in the interlock housing, unlocking the hatchway door. -The armature then enters the space between angles 51 and its leather surface 78 is drawn against the toothed rollers 80. As the armature is coupled to carriage 35 it strikes'roller 82, rocking the bell crank 86.

Contact 88 is thus moved from engagement with contact 91 and. into engagement with contact 92. The engagement of

contacts

88 and 92 completes a circuit for causing motor 37 to operate the motor in a direction to move he carriage 35 to open the gate and door. The motor .uponoperation moves carriage 35 on track 30 and, through the lines of force emanating from magnets which permeate plate to establish a magnetic connection between the gate and carriage 35 and which maintain armature 63 coupled to the carriage, cause the gate 26 and door 54 to be moved toward open position. While the angles 51 and the teeth of rolls 80 on carriage 35 have beendescribed as acting to insure against .lateral motion of the carriage relatively to armature 63 as the carriage is moved, it isto be understood that these are precautionary features and that the lines of force emanating from magnets 50 act upon the armature "63 to cause movement of the hatchwaydoor with the carriage as well as to attract the armature to the carriage.

(In theinitial movement of the carriage cam 171'rides from under the roller 179 al lowing thecontacts of switch 170 to engage. The initial movement of gate 26 causes'the roller 148 to'move from engagement with operating lever 158 permitting gate switch 159 to open.

At thebeginning of the gate and door opening movement piston 113 is at the upper end of cylinder-112 adjacent the grooves 117. As the gate and door are opened shaft 98 is operated by chain 97. Rotation of shaft 98 moves travelling nut 104 to the right along worm 103. As nut 10 1 is secured to the walking beam 106 the latter is rocked clockwise about its pivot 107, thus moving piston 113 downwardly in cylinder 112. While the piston is moving in the grooved portion of the cylinder the liquid flows freely in the grooves from one side of the piston to the other, thus permitting free movement of the gate 26 and door 54 toward open position. When the gate and door are within a short distance of their fully open position piston 113 enters the ungrooved portion of cylinder 112 and its movement, as well as that of the gate and door, is immediately retarded. This retardation is due to the inability of the liquid to continue to pass around the piston through the grooves and to the-action of ball check 116 which prevents the flow of liquid trapped between piston 113 and bottom plug 118 through the piston by-pass 115. As piston 113 continues to move, the trapped liquid must flow to the other side of the piston by way of by-pass 120. As the by-pass is restricted by needle valve 121 the flow occurs slowly and the gate, door and piston are retarded in their movement.

As the gate and door reach open position cam 171 on carriage 35 lifts the roller 169 of H switch 160, rock-ing lever 161 against the force of spring :166 to separate=:the contacts 164 and 165. This causes the circuits .for.motor 37 to. be interrupted. As a result, the gate anddoorare brought to aistop, the checking device 'causin .them to. be brought to rest easily'and quletly. Theusual bumpers are provided to prevent undue coasting of the gate randdoor after-the circuits of. motor37 are interrupted.- ,,,Magnets are also deenergized. as switch 160 opens. .As a result armature 63 moves by gravity toward the hatchwayzdoor, thus interrupting the. cou-. pling-ofthe doorto carriage 35. Movement ofarmaturez63 away from the carriage also results in movement of contact 88 from engagementxwith contact 92 .into engagement with-contact 91, aspreviously .described.

heniit isdesired-to close the car gate and hatchway .door magnets v50 are energized to couple the gate and :door tothe carriage. The. attraction .of. armature 63 by 'magnets 50 causes ,contact.=88. to move from engagement with contact 91 into engagement withcontact 92,..asp'reviously .described. .;Upon the engagement of. contact 88 with contact 92 a circuit is. completed to cause the energization of the motor 37-forsreverse operation. The carriage 35 ;-is movedby motor 37 .and, as the carriage is magneticallyzcoupled-to gate v26 and door 54, the car gate and hatchway. door move with. the carriage toward their closed position. The initial :movement of carriage 35 causes cam. 171 to ride from under the roller 169 o'fswitch 160 permitting contacts 164 and 165, of the switch to engage. I

At the beginning of the gate and'door closing operation piston 113 is adjacent plug.l18 with its cylindrical portion in contact with the ungrooved portion of the cylinder wall. As thegate and door close the travelling. nut 104 is moved to the left rocking the walking beam 106 counterclockwise and the piston starts tomove away from plug 118. The resulting reducedpressure in the space between.

through the by-pass 115 therein. At the same time a limited quantity of liquid flows into this space through bypass 120. Thus, the resistance offered to the initial closing movement of the gate by the action of piston 113 within the ungrooved portion of cylinder 112 is negligible. When the piston is moved into the grooved portion of cylinder 112 the liquid flows freely through the grooves. Free movement of the gate and door toward closed position 'is thus permitted. However, as the fully closed position is approached, the gate and door are checked by the action of checking device 127. This device acts to retard the gate and door atthe end of the closing operation in the same manner previously described for-checkingdevice 109 intheopen ingl operation. i

When the gate and door reach: closed position the 5 contacts of switch :170. are separated byLengagement .of the cam 17.1 .with :roller 7 179 causingthecircuit for motor 37 to be ins.

terruptedand the movement of carriage 35 ceases. The gate in itsfinal movement causes roller 148;:to-engage lever 158 effecting en..

gagemen-tof thecontactsofgate switch 159.

When magnets 50.are deenergized armature- 63-is no .*longer' attracted :and tails-back against.-the1door.54. .As armature 63.nioves from between-angles 51 it moves out of engagementiwithroller-82 permitting spring to =move contact '88 from engagement with contact-92 and'into engagement with contact 91 in preparationfor a subsequent operation. As 1 the armature continues: to fall back, its projections76 realign with thev lugs 77 of the interlock; housing :to lock the hatchway door' though due tobuil ingconstruction or other causes variations in clearance mayexist be-' tween the car and the door sills at thewariQus floors; The magnetic .gap between magnets 50 on the carriage and plate 52 on thecar re? mains constant, unaffected by such variations in :clearance,owingtothe fact-that both the gateandca-rriage 35 are carried by the car. In case of the hatchwaydoors, however, such variations in clearance'cause a corresponding variation to exist in the amount of magnetic gap between magnets 50-and armatures 63 on the hatchway doors at the various-floors. The arrangement of movable armatures effectively obviates any possibility of-faulty' operat on .of the hatchway. doors, the armatures simply being moved a greater distance in case of large clearances and a less distance in the caseof small clearances. The armatures are moved to-full attracted position in every case, sothatthe coupling of the doors to the closure operator on the car is positively effected and firmly maintained regardless of'variations in clearance which may exist.

It is also to be noted that each armature 63 also serves as part ;of the interlock mechanism for the hatchway door for which it is provided. Thus, not only is the construction of the door operating and interlocking mechanism for each door simplified by such unitary arrangement but also an electromagnetic interlock is provided for each batchway door witha single actuating electromagnet carried by the car for operating the various interlocks. Such arrangement is of particular advantage in present day electric elevator systems because of the .resultant economy in space, low cost of manufacture, installation and operation, and the positivefore. the hatchway door is connected tothe hatchway door operating mechanism. Thus,

any possibility of damage to the installation or injury to'p'ersons, due, for example; to the operation ofthe' doorand gate-operating mechanism before rendering 1 the control circuits ineffective and unlocking the hatchwa-y door,isobviated.

1: The adaptation of the closure operating and interlocking mechanism to *an' elevator system iniwhich the elevator .car is controlled by'an operator in thecar is illustrated Iin' Fig-- ure 10. A direct current zcontrol'is' shown although it is to be understoodtha't the invene. tion is applicable to "alternating. current systems.. .For convenience, a threefloor installa-X t-ionwillbe described; 5 "1;

- In F igure lO'thovamoUselectromagnetm switches employed in thefsystem are .desig nated as follows an: 1

.-'AUp. direction switch, B'-Down direction switch,

; P--Coupling .magnetswitch, I

XDoor and-gate opening. switch, Y-- Door. and'gateclosing switch,.. ZDoor and gate control switch.r

Throughout the following description'these letters in addition to the usual reference numerals will be/employed whenreferring to parts related to the respective'switches. For example, Y 183 designates contacts of the door and gate closing switch while coil B 155.

is. the actuating coil-,ofxthe down direction switch for theelevator-moton The'hoistingimotor for the elevator car and its associated mechanisms and :thecontrol circuits therefor have been omitted to simplify the description. The actuating coils of the elevator motor direction switches and the direction switch interlock i contacts are shown to illustrate the action of the hatch- L way door. interlock contacts and gate switch eration of the car switch. The motor 37 which moves the carriage 35 to operate the gate and door is, for simplicity of illustration,

shown as a series wound direct current motor. Its armature is designated 130 andits series field winding is designated 131'.v The numeral 132 designates a selector machine or similar mechanism actuated in accordance with car travel. Selector-machine 132 is provided with cams 133,-.134 and 135- adapted to cause the separation of the contacts 136 of a switch 137 when the elevator car is -positioned within a certain zone with relation to the various landings, as for example, when the platform of the elevator car is three inches above or below the level of the landings. This zone will be hereinafter referred to as the door operating zone. One of the con tacts 136 is biased to engaged position with theother contact by a spring 138 acting on the switch lever. The numeral 140 designates a switch controlled by a governor responsive to car speed. Governor controlled switch 140 is arranged to prevent the coupling of the hatchway doors to carriage 35 when the'elevator car is moving, as in or through the door operating zone, above a predetermined speed. The car switch is designated 141. The car switch is provided with the usual bridging segment and control contacts for the elevator motor control circuits and also with a member=144 having a pair of arcuate cam surfaces separated by a depression for receiving the roll'er'145 of an auxiliary door control switch in series relation and represented in Figure 10 by a single pair of contacts 75 together with the associated bridging contact 73. A

manually operable switch 128 is provided in the car for effecting the deenergization of magnets when desired. The numeral 149 designates a resistance the purpose of which will hereinafter be described.

ires

200 and 202 are connected to a suitable source of power supply.

The operation is as follows: Assume that the elevator car is at rest at the third floor with the car switch 141 in neutral position. The cam 133 on the floor controller which corresponds to the third floor is in engagement with the lever of switch 137, causing contacts 136 to be separated. As the car is at rest the governor controlled switch 140 is also open. Assume further that the car gate and the adjacent hatchway door are in open position. As a result, door limit switch 160, gate switch 159, and third floor door interlock switch 73, are open and limit switch 170 is closed. The switches are illustrated in this condition in Figure 10.

Assume that a trip is to be made to the first floor. The elevator operator moves the car switch 141 in the counterclockwise direction from neutral position. The initial movement of the car switch causes the right-hand cam surface of member 144 to raise roller 145, thereby effecting the engagement of contacts 146 of the auxiliary door control switch. The engagement of contacts 146 completes a circuit from wire 200, through contacts 146, coil Z 1.78, to wire 202, for actuating coil Z 178 of the door control switch. The energization of coil Z 178 results in the engagement hatchwayj-door, the armature isattracted upon-energization of the .-magnets coupling the .hatchway door to the: carriage .as ,previ-' ously described. As thearmature moves'into position between @the angle: members 5,1L it, rike the o ler; 82.m. v g c a t.8 -.from.

engagemcntwith n a 91. n o'engag m nta with ()1[1,ta(; l]- -92-., The .separ-atin. of contacts .8-. 9 1 rem ve ort ci a nd; resistance 5149; thereby placing this resistance,

- in seriesflwith -the;:magnets 0. Resistance 1.49.;1ctsto reduce the; current passing through magnets 50, preventing overheating 0t the 1 magnets and reducing current consumption, Theengagement of contacts 88.and 92 comu iletesfthe circuit tor, actuatingv coil Y 181 of the gate :and doOr closing ,switch. This circuit may be traced from, wire 200, through contact 88, contact 92, contactsgX 192 of. the door. opening switclncoil Y181, contacts Z .172, contacts 180, to ,wire .202 Coil' Y l-81 qn energization efi'ectsthe separation of contacts Y 182 and the engagement \of contacts and Y :184. Contacts Y 182 togetherwith contacts Z 173 arein-the circuit. toractuating flcofl X191 of. the door opening switch, tlie. separation,:.0f these contactspreventing energization of this coil. Contacts Y .182 together with contacts X 192 function as electrical interlocks. The engagement-of contacts Y 183 and 1 7,184 completes-the circuittor'the armatureand series field winding ofthe gate and door operating motor This circuit is from ,\Vl16,200, through 'con tacts Y 183, armature130, contacts Y 184, series field winding 131, to wire 202.

Upon energization of its. windings, .motor- 37 is operated to move the carriage in a direction .to close the gate and hatchway door. As the car gate and hatchway door are coupled .to carriage 35 by the lines of force emanating from magnets they are moved with the carriage towards closed position. As the gate and door move from. open position the cam 171 on carriage 35 moves from under the roller 169 permitting limit switch 160-.to close. The closing of switch 160 establishes an additional circuit for magnets 50, this switch paralleling-contacts Z177 of switch Z. 'VVhen the gate and door reach closed position the cam 171 on carriage 35 engages the roller .179 causing-limit switch- 17 ()to-ojpen.- Upon the opening of-switch 1-70 magnets 50 become deenergized thereby interrupting (the :magnetic ,connection of the gate and doorto thecarriage.

- As thearmaturez63-is nollonger attractedby magnets=50 it=movesby gravity away fromthe carriage 35 and out of engaging relation with the. roller. :82 resulting in the movement of contact 88a:from-.engagement with contact 92 intoengagement with contact 91 as previously described; .The separation of

contacts

88 and 92. results in the deenergization of actuating'coilY 181 of .the1gate and'door closing.

switch." @Upon {the deenergization of coil Y 181, contacts Y 182 engage and-contacts Y 183 and Y 18.4.separate; Theseparationaof contacts-13 183 and Y 18 1results in the interruption of the circuit for armature .130 and-series field 131 of gate and door operating motor. 37 and :themotor stops. The engagement of:eontacts.'Y 181 prepares the aircuiteofvactuating coil 191 for-a gate and door-opening operations The engagement of

contacts

88 and 91 short-circuits the resistance 14:9 to permit the :fullcurrent value to pass through magnets 50 upon the initiation of a subsequent gate and door operation.

The armature. 63 continues'to move away from carriage35 .into juxtaposition with the rear surface of'the hatchway door 54 and successively locks-the hatchway in closed position and moves contact 73 into bridging relation withithe door contacts 75 as previously described. As the car gate reaches closed position gateswitch 159 closes. The closing of gate switch 159 together with the bridging ofdoor lock contacts 7 5 by contact 73 prepares the circuits for the actuating coils of the direction-switches of the hoisting motor.

Upon further counterclockwise movement of car switch 141 from neutral position segment 142

bridges contacts

153 and 154; completing the circuit for the :actuating coil B 155 of the elevator motor down direction switch. The circuit for coil B155- may be traced from wire 200, through door lock contacts75, gate-switch'159,-coil B 155, contact 153, segment 1 12, contact 154, contacts A 156 of the up direction switch, to wire202. The energization of coi l B 155 efiects the separation of contacts B 157. The separation of contacts B 157 of the down-direction switch opens the circuit for the actuating .0011 A 152 of the up direction switch. These contacts together with contacts A 156 serve as electricalinterlocks for the circuits of the actuating coils of the direction-switches. Other contacts, not shown, are provided on the down direction switch, the energization' of coil B 155 causing these contacts to assume positions efiectingthe starting of the elevator car in the down direction. A sequence relay may be provided, if desired, to prevent the starting'of the car on the door and gate contacts.

Such a: relay is knownin the 'art and is arra'ged to prevent the starting of thecar in the event that

contacts

153 and 154 are bridged beforet'the door and'gate are closed and the related-contacts are engaged. To simplify the description such aniarrangement is not shown.

With the carswitch in the full on'position control mechanisms are operated to cause the car to be brought up to full speed. As the car leaves the third floor and passes beyond the door operating zone the "lever of switch 137 disengages cam 133 to permit spring 138 to effect the engagement of contacts136. The engagement of contacts 136 completes a circuit for actuating coil P 190- of the coupling magnet switch; The energization-ot coil P 190 results in the separation oi contacts P- 180,'further opening thecircuit for'co'upli'ng magnets oo. When the elevator car: reaches a predetermined speed," the contacts of'gow ernor controlled switch 140 are brid' ed to establish an: additional circuit for coil 190.

'When the elevator-car arrives within the door operating zone at'the secondfloor: the operation otselectormachine 132 efl'ects the separation of contacts 136by the engagement of cam 134 and the lever of switch 137. A As a stop-is not to be made at the second floor the car'is moving above the speed at which: (iv-- ernor switch 140 opens so that coil P1 0 is not deenergized by'the'separation of contacts 136 as the car asses the-second floor.

Upon approaching the first floor the op eratormoves the car switch from full on position to neutral position causing the stopping of thecar. When the car switchis moved to neutral position, the roller 145'of-switch 14:7 falls into the depression between the cam surfaces of member 1 14; resulting in'the separation of contacts 146. Upon separation of contacts 146,'coil Z 17 8 is deenergized and contacts Z172 and Z 177 separate while oon-' tacts Z173 and Z 176 engage; The separation of contacts Z 172 'interru ts the circuit for coil Y 181 of the gate and cor closing switch. Theengagement of contacts Z173 prepares the circuit for actuating coil X 191 of gate and door opening switch. The separation of contacts Z 177 interrupts the circuit bypassing the limit switch 160. The engagement of contacts Z 17 6 by-passes limit switch 170.

It will be assumed that on or before reaching the door operating zone at the first floor the speed of the car'has decreased sufiiciently to cause governor controlled switch 140 to open. As the car arrives within this zone, switch 137 opens as the switch lever engages cam 135. The opening of this switch to gether with the opening of governorswitch 140 causes the deenergization of coil P 190. Contacts P 180 engage and complete a circuit for coupling magnets 50 through contacts Z 17 6 and limit switch 160.

Magnets 50 upon energization attract armature 63 to move contact 73 from engagement with door lock contacts 75, unlock the hatohway door at the first floor, couple the h'atchway door to carriage 35 and effect the movement of contact 88 from engagement with contact 91 into engagement with contact 92, all as previously described. When contact '73 is moved out of engagement with con-' tacts 7 5 the circuit for the actuating coils A 152 and B 155 of the'direction switches of the elevator motor is opened. Upon engagement of

contacts

88 and 92 the circuit for coil X 191 of the gateand door opening switch iscom pleted through contacts Y 182, Z 173 and P 180, resulting in the separation of contacts X 192 and the engagement of contacts X 193 and X19 1; The separation of contacts X192 opens'th'e-circuit of coil Y 181 to prevent op eration of the gate and door closing switch; The engagement ofcontacts X 193 and X 19 1 completes the circuit for the armature 130 and series field winding 131 of the gate and door operating motor 37. This circuit may be traced from-wire 200, through'contacts X 193, armature 130, contacts X 194, series field winding 131, to wire 202.

The circuit forthc armature of motor 37 being reversed from that previously traced the motor operates to move carriage 35 and the car gate and hatchwa-y door toward open position. As the car gate and hatchway door are moved from closed position the cam 171 on carriage 35 moves out of engagement with roller 179 permitting the switch 170 to close. Theclosing of switch170 completes an addi tional circuit for magnets 50 paralleling contacts Z 176. As the gate is moved from closed position the roller 1 18 carried thereby moves out'of engagement with lever 158 and gate switch 159 opens further interrupting the circuit for coils A 152 and B 155.

When the gate and door reach open posi tion the cam 171 engages roller 169 thereby causing limit switch 160 to open. The opening of switch 160 results in the deenergiza tion of the coupling magnets 50. Armature 63 on the hatchway door at the first fioor, no longer held against carriage 35 by the'field of magnets 50, moves by gravity away from the carriage into juxtaposition with the rear surface of the door. As the armature 63 moves away from the carriage 35 it moves out of engagement with roller 82 permitting contact 88to move from contact 92 into engagement with contact 91. The engagement of

contacts

88 and 91 by-passes resistance 149 as previously described. The separation of

contacts

88 and 92 results in the deenergization of actuating coil X 191. As the coil X 191 is deenergized, contacts X 192 engage and contacts X 193 and X 194: separate. The separation of contacts X 193 and X 194: interrupts the circuits for the armature 130' and series field winding 131 of gateand door operating motor 37 and the latter stops. The

engagement of contacts X 192 prepares the circuit for coil Y 181 of the gate and door closing switch.

After initiating the operation of motor 37 to close the car gate and hatchway door, the closing movement may be interrupted and the gate and door returned to open position by moving the car switch back to neutral position; This effects the deenergization of switch Z 178 breaking the circuit for coil Y 1810i thedoor closing switch and completing theicircuit for coil X 191 of the door opening:switch. 'This causes the door operating motor to be reversed to return the door and gate to-open position the circuit for coupling magnets 50 being maintained through

limit switches

160 and 170 to maintain the door and gate coupled to the carriage. Similarly, after-initiating the operation of motor 37 to open the'car gate and hatchway door by movement ofthezcar switch to neutral position. the opening movement may be interrupted and the gate and door returned to closed posi tion by moving the-car switch in either direction; from .neutralposition. This effectsthe energization of switch Z 178 breaking. the circuit-for.:coil 191 of the door opening switch and completing the circuit for coil Y 181 of the door closing switch. -As a result; motor 37'is reversed, returning the door and gate to-closed position, the coupling magnets .being maintained energized. as before, through

limit switches

160 and 170.

"If it is desired to maintain the car gate and h'atchwaydoor coupled to carriage while the gate and door are in open position, the limit-switchlGO. which is opened when the gateand door reach open position, may be removed from the circuit of magnets 50. The contacts Z 177 .maythen be omitted from the circuit of magnets as their function is'to by-pass the switch 160 to permit the gate. and door to be coupled to the carriage 35 and moved from open position. When this arrangement is employed to maintain the magnetic coupling between the car gate. hatchway door and carriage limit switch 160 is arranged. to interrupt the circuit for coil X 191 of the gate and door opening switch tostop motor 37 when the gate and door reach open position.-

The manually operable switch 128 in the elevator car is provided to permit deenergization of coupling magnets 50 when desired. Thus. by operating switch 128 and deenergizing the magnets. the gate and door may be operated by hand. without manually exerting additional force to operate motor 37 and the mechanism connected thereto. In case of manual operation the interlocking mechanism may be released by upward movement of armature 63 through the intermediary of rod 68. The provision of the arrangement for permitting deenergizaticn of magnets 50 is of particular advantage in case motor 37 becomes out of order'an-dis also of advantage in that it permits the door and gate to be maintained in open position-for aconsiderable period without having the magnets energized in cases where the deenergization ,of magnets 50 when the gate and door are in open position is not normally effected.

. It is to be understood that levelling mechanism may beprovided to effect exact landing stops,';and the controlrircuits may be arranged .to permit the openingofthe door and gate during the levelling. operation. In caseof systems in which the stopping of the car at the la-ndingslis underthe control of the passengers t11emselves,-the control circuitsmay be arranged to prevent the opening of the door. andgate until thecar has been stopped at the landing, such as by controlling the door and gate-operating mechanism in the stopping operationby a selector ,machineor other mechanism actuated in accordance with car-movement.

y v It isto benoted that the operation of motor 37 to move carriage 35- to open or close "the gate and door-is dependent :uponthe operationof thegswitching mechanism on the carriage by the armature on the hatchway door. Thus. the motoro37 is ineffective to operate the carriage and the dooivan'dgate unless the door is properly connected to the carriage. While the invention has been described as applied to-an elevator system in which both the starting and-stopping of the car is under the control of an operator in the car, it is to beunderst-ood that such system' has been cho'senmerely to illustrate the principles of operation of the invention. 1 The invention is also applicable to systems in which the starting of the car is under the control of an operator in the car'with the stopping of the car automatically effected, and to systems in which both the starting and stopping of the car, or only the stopping thereof, is under the control of the passengers and intending passengers themselves. Also, manually operable control. switches may be provided for controlling the operation of the gate and door operating mechanism.

According to the embodiment of the invention described, the carriage, car gate and hatchway door have been described as operated by the motor 37 in both the opening and closing direction. It is to be understood, however, that other arrangements may be employed such as utilizing motor 37 for the opening operation with the mechanism biased to closed position and such as employing other forms of motive means in place of the operating motor illustrated.

As many changes could be made in the above construction and many apparently widely difi'erent embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown ..in..the accompanying drawings. shall be "interpreted as illustrative andnot in a limiting sense.-

What is claimed is:

1. In an elevator installation; and elevator car; closure meansfor affording access-to said car; an armature :carriedby said closure means anelectromagnetfor said armature; means for moving said: electromagnet :in the direction of movement of said closure means; and means responsive=to said electromagnet, upon energization thereof, forcausing a the operation of said moving means to move-said electromagnet, said moving means,- upon op-- eration; acting solely-through the lines offorce #between said electromagnet I and said armature-to move said closing means.

2. In anelevator-installation; an elevator car; closure means which-when open afi'ords access to said ear; means for operating'saidclosure-"means; said operati-ng means being disconnectedfrem said closure means; an electromagnet connected to :said operating means fonrmovement thereby; an armature for'saidelectromagnet connected to 1 said closuremeansand attractable' by said electromagnet to couple said closure-means to said closure operating means; .and circuit con-- trolling; uneans operated i by said I armature upomattractionthereofibysaidelectromagnet.

' '3 In an elevator installation an elevator car closure means i which when open afiords access to .said car; -means 2 for operating said closure means; said. operating means comprising a'magnet; :a movable armature for said magnet'carried bysaid-closure means, said :a'rmature -being movable by the attraction'of said magnet intoi a=-positi-onto couple saidclosure means "to said loperating means for operation thereby; rand mea'ns operated by :said armature,-upon-itsmovement :to said position; for causing saidoperatingmeans to operateasaid closure means.-

4.- In an elevator installation; an elevator car; closure means-which when-open .ailords access to said car; means-for operating said closure means; said operating means being disconnected from said closure= means; an electromagnet conneeted tosaid operating means -for movement thereby; an armature for said electromagnet connected. to said closuremeans and. movable by said electromagnet to couple said closuremeans to said closure operating means; .andzmeans controlled by said armaturefor preventing the operation of said operating means until said closure means has been coupled to said operating meansbythe attraction of said armature by said magnet.

5. In an elevatoivinstallations; an elevator car; a car-gate; a hatchway door; a motor carried by said car; a carriage. carried by the car; said "carriage being' movable transversely offthe openings closed by said gate and door-and being disconnected .from said gate and door; means for connecting said carriage to said motortto be moved thereby; an electromagnet carried by said carriage; an armature carried by said gate and an armature carried by :said door, said armatures,. upon energization of .said' electromagnet,. being acted upon-by the magnetic field ofi said: electromagnet to .couple said gate and dOOIZlZO said carriage for movement therewithzby said motor; and circuit controlling means. operated by said electromagnet upon the;coupling of said gate and door tosaid carriage'for causingthe energization of said motor..

6. In an elevator installation; an elevator car; closure means which when open affords accessto said car; means for operating said closure 'means, said. opera-ting means comprisinga motor and a magnet; a movable armature for said: magnet carried by said closure means,- said armature being-movable by the attraction of said magnet to a-position. to couple said. closure means to said operating means for operation .thereby and circuit controlling :means :for said motor operable by said movable armature, uponv its movement to said coupling position for causingenergizationrof said motor :to operate said closure means.

7. In an elevatorinstallation; an elevator car; closure means which when open afi'ords accessto .said car; means for operating said closure means; :couplinggmeans operable to couple and uncouple said closure means to said closure operating means; and interlocking mechanism for said :closure .means, said interlocking-mechanism comprisingcircuit-controlling means and means for locking said closure means. and being: operable by said coupling means to open said circuit con trolling means and to unlock said closure means prior to the couplingv of -said closure means-to said closure operating means.

8. In an elevator installation; an elevator car; closure means which when open affords access .to said car; means for operating said closure means; coupling means operable to couple and uncouple said closure meansto said. closure operating means; and locking mechanism for said closure means operated by'said coupling means to=unlock said closure means prior to the coupling of said closure means to said closure operating means.

9. In an elevator installation; an elevator car; closure means for affording'access to said car; means foroperating said closure means, said operating means being uncoupled fromsaid closure means; a magnet for coupling said closure means to said operating means, for operation thereby; and interlocking mechanism for said closure means, said interlocking. mechanism comprising circuit controlling means and means for locking said closure means and'being operable by said magnetto open said circuit controlling means and to unlock said closure means prior to the coupling of said closure means to said closure operating means.

10. In anelevator installation; an elevator car; closure means for affording access to said=car; means for operating said closure means, said closure means being disconnected from said closure operating means; a movable armature carried by said closure means; means cooperating with said armature to lock said closure means; circuit controlling means operable by said armature; and'a magnet for causing movement of said armature to operate said circuitcontrolling means, unlock said' closure inean's'and connect said closure means to said closure operating means.

11. In an elevator installation; an elevator car; closure means for afi'ording' access to the car; a movable armature carried by said closure means; operating mechanism for said closure means disconnected therefrom; an electromagnet connected to said operating mechanism for movement thereby, said electromagnet upon'energization attracting said armature to a position to couple said closure means tolsaid operating mechanism; switclr ing mechanism operated by said armature upon attraction'thereof by said electromagnet prior to the coupling of said closure means to said operating mechanism; and locking means for said closure means'operated by said armatureupon attraction thereof by said clectromagnet to unlock said closure means, said locking means also being operated prior to the coupling of said closure means to said operating mechanism but subsequent to the operation of said switching mechanism.

12. In an elevator installation; an elevator car; closure means for affording access to the car; a movable armature carried by said closure means; operating mechanism for said closure means disconnected therefrom; an electromagnet connected to said operating mechanism for movement thereby, said electromagnet upon 'energization attracting said armature to a position to couple said closure means to said operating mechanism; switching mechanism operated by said armature upon attraction thereof'by said electromagnet prior to the coupling of said closure means to said operating mechanism; locking means for said closure means operated by said armature upon attraction thereof by said electromagnet to unlock said closure means, said locking means also being operated prior to the coupling of said closure means to said operating mechanism but subsequent to the operation of said switching mechanism; and additional switching mechanism operable by said armature upon attraction thereof by said clectromagnet when the coupling of said closure means to said operating mechanism eil'ected.

13. In an elevator installation; an elevator car; closure means for affording access to said car; a motor; a carriage movable transversely of the opening closed by said closure means said carriage being disconnected from said closure means; means connecting said carriage to said motor for operation thereby; a movable armature carried by said closure means; an electromagnet for said armature on said carriage; said electromagnet, upon energizatio-n, acting through the intermediary of its magnetic held on said armature to move said armature to couple said closure means to said carriage for movement thereby; and angle members on said carriage for receiving said armature tl'ierebetween, each of said angle members; being adapted to be engaged by said armature, in the event of lateral motion of said carriage relatively. to said armature, for preventing breaking of the coupling of said closure means to said carriage once said coupling has beeneflected.

14. In an elevator installation; an elevator car; closure means for affording access to said car; a motor; a carriage movable transversely of the opening closed by said closure means, said carriage being disconnected from said closure means; means connecting said carriage to said motor for operation thereby; a movable armature carried by said closure means; an electromagnet for said armature on said carriage, said electromagnet, upon energization; acting through the intermediary of its magnetic field on said armature to move saidarmature to couplelsaid closure means to said carriage for movement thereby; angle members on said carriage for receiving said armature therebetween, each of said'angle members being adapted to .be engaged by said armature, in the event of lateral motion of said carriage relatively to said armature, for preventing breaking of the coupling of said closure means to said carriage once said coupling has been effected; and anti-friction means mounted on said carriage between said angle members, said antifriction means cooperating with said armature, to permit up or down movement of said carriage relatively to said armature Without undue friction, when said closure means is coupled to said carriage.

l5. In'an elevator installation; an elevator car; a hatchway door; a gate on said car; an electric motor carried by the car; a carriage slidably mountedon said car for movement in the direction of movement of said door and gate. said carriage being disconnected from said gate and door; means connecting said carriage to said motor for movement thereby; an armature carried by said gate, an armature pivotally mounted on said door; angle members mounted on said carriage for receiving said pivoted armature therebetween: a switch on said carriage for controlling said motor; a lever for operating said switch having a. roller positioned between. said langle members; 'el ectromagnets pieces positioned between said angle members, said electromagnets on energization acting through the intermediary of the lines of force emanating therefrom to said armature carried by the gate to couple said gate to said carriage and acting to attract said armature on said door to a position between said angle members, said armature on said door, upon being removed to said position between said angle members, engaging said roller to operate said switch, said angle members preventing breaking of the coupling between said carriage and door in the event relative movement of said angle members and said armature on the door occurs; sound deadening ,means on the face of said armature on the door; and anti-friction rollersmounted on said carriage between said angle members to be engaged by said sound deadening means on said armature, the faces of said rollers being serrated in the direction of movement of said car to permit movement of said car with respect to said door without undue friction and to aid in maintaining the coupling of said armature on said door to said carriage.

16. In an elevator installation; a hatchway; an elevator car therein; a landing served by said car; means for moving said car in said hatchway and for stopping it at said landing; a hatchway door at said landing which when open ail'ords access to said car; means for operating said hatchway door, said operating means comprising a carriage slidably mounted on said car and being disconnected from said door; a motor for moving said carriage; a lock member for said door; an armature pivotally mounted on said door for cooperating with said lock member to lock said door in closed position; a switch operable by said armature, when said door is locked, for enabling movement of said car moving and stopping means; an electromagnet adapted upon energization to move said armature for unlocking said door, for operating said switch to prevent movement of said car by said car moving and stopping means and for coupling said door to said car for movement therewith; a switch operable by said armature, when the coupling of said door to said carriage has been effected, for energizing said motor to move said carriage; said first mentioned switch being operated prior to the operation of said second mentioned switch; and means for energizing said electromagnet upon the arrival of said car to stop at said landing.

17. In an elevator installation; a hatchway; an elevator car therein; a landin served by said car; means for moving sai car in said hatchway and for stopping it at said landing; a hatchway door at said landing which when open affords access to said car; means for operating said hatchway door, said operating means comprising a carriage slidably mounted on said car and being disconnected from said door; a motor for moving said carriage; a lock member for said door; an armature pivotally mounted on said door for cooperating with said lock member to lock said door in closed position; a switch operable by said armature, when said door is locked, for enablin movement of said car by said car moving an stopping means; an electromagnet adapted upon energization to move said armature for unlocking said door, for operating said switch to prevent movement of said car by said car moving and stopping means and for coupling said door to said carriage for movement therewith; a switch operable by said armature, when the coupling of said door to said carriage has been effected, for energizing said motor to move said carriage; said first mentioned switch being operated prior to the operation of said second mentioned switch; means for energizing said electromagnet upon the arrival of said car to stop at said landing; and manually operable means for operating said first mentioned switch to prevent movement of said car, for unlocking said door and for operating said door.

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

THOMAS BRADY.